TM 9-745 90MM MOTOR GUN CARRIAGE M36B2

7/28/2019 TM 9-745 90MM MOTOR GUN CARRIAGE M36B2

http://slidepdf.com/reader/full/tm-9-745-90mm-motor-gun-carriage-m36b2 1/529

CALMANUAL

P u b l

i c D o m a i n , G o o g l e - d i g i t i z e d

/ h t t p : / / w w w . h

a t h i t r u s t . o r g / a c c e s s_

u s e # p d - g o o g l e



NICALMANUAL

nsotWDTBORD12,12 Jan44;WDTBORD20.24Jan 44-

WDTBORD83,25 Apr44;WDTBORD88-4 May44;WDTB

BORD126,19Jul44; WDTBORD133,3Aug44-OFSTB

RD161,28May43;OFSTB700-66,11Jun 43;OFSTB700-67

5 Jun43;OFSTB700-71,28Jun43; andOFSTB700-9O,

eTB'sremainin torceuntilincorporatedinallotheraffectedTM's

LY1945

IONOFRESTRICTEDMATTER.

byvirtueofhisgrade orpositiontoknowledge

matter.Suchmatterisentrustedonly tothose

dutiesrequiresuchknowledgeorpossession.

AR380-5,15March1944.)

P u b l i c D o m a i n , G o o g l e - d i g i t i z e d

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y 1945

orCarriageM36B2,ispublishedfor

nceofallconcerned.

8-45)J

TARYOFWAR:

ral.

GF(5);ASF(2);TofOpn(10);AAF

;SDivASF(1); Tech

U(1);PE(OrdO)

2);Decentralized

nts,9(5)exceptAmm

SpSv Sch(10);USMA

2);AF(2);Bn

(3); 9-37(3);

;9-76(2);9-127(3);

(2); 9-327(3);9-328

ls,seeFM21-6.)


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ON

55—9

sories6— 910— 21

GINSTRUCTIONS

equip-

ts14-1628-44

arycondi-

eration....19-2052-55

quip-

alcondi-

nemy

ANCEINSTRUCTIONS

1

ltoolsand

90

nceservices36— 4290—124

2125-147

nand

3— 55148—159

ndinstal-

lvemech-

onsys-

87228-239

2239-245

brication


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ANCEINSTRUCTIONS(Contd)

enginelubrication

7-127264-280

dclutches128-134280-300

universal

erential,and

1

gsuspen-

42-379

chometer164-165379-381

-170382-386

tingsystem171-176386-395

dhorn177-184395^05

-193405-421

-441

esuppression204-208441-448

458

tor224-228458-464

ystem229-232465-469

QUIPMENT

470

equip-

on237-238478-480

ginstruc-

trolequip-

6498-502

andlimitedstorage257-259503-506

2507-511


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nsotWDTBORD12,12 Jan44;WDTBORO20,24Jan 44;

WDTBORD83,25 Apr44;WDTBORD88,4May 44;WDTB

BORD126,19Jul44; WDTBORD133,3Aug44;OFSTB

D161,28May 43;OFSTB700-66,11Jun43;OFSTB700-67,

5 Jun43;OFSTB700-71,28Jun43; andOFSTB70O-90,

eTB'sremainin torceuntilincorporatedinallotheraffectedTM'i

ON

epublishedfortheinformationandguid-

ycontaininformationonoperationand

ment,aswellasdescriptionsofmajorunits

onto othercomponentsofthisvehicle.

mmgun motorcarriageM36B2,wetand

arrangedin fourparts:PartOne,Intro-

ngInstructions;PartThree,Maintenance

xiliaryEquipment.

ofthemanualcontainsinstructions

orage,anda listofreferencesincluding

sts,technicalmanuals,andotherpublications

cableforusein performingprescribed

wwithabrief explanationofeach:

.9-74(OLDW.D.,O.O.FORMNo.

ICLEOPERATOR'SPERMIT.Thisformwill

officersofposts,camps,stations,ororganiza-

litaryvehicleswhohavepassedthedriver's

ndTM21-301)andarequalifiedto drive

donthepermit.

BRICATIONORDER.WarDepartment

45prescribeslubricationmaintenancefor

orderisissued witheachvehicleandis

mes.

26,DRIVER'SREPORT— ACCIDENT,

N.Onecopyofthisformwillbekeptwith

caseofanaccidentresultingininjury or

ructionswiththemateriel,thistechnicalmanualhasbeenpublished

chnicalreview.Anyerrorsoromissionswillbe correctedbychanges

revision.


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http://slidepdf.com/reader/full/tm-9-745-90mm-motor-gun-carriage-m36b2 7/529 P u b l i c D o m a i n , G o o g l e - d i g i t i z e d

/ h t t p : / / w w w . h





filled outbythedriveron thespotoras

ereafter.

RMNo.48(OLDW.D.,G.M.C.FORM

CKETANDPREVENTIVEMAINTENANCE

m,properlyexecuted,willbefurnished

is dispatchedonnon-tacticalmissions.

ser ofthevehiclewillcompleteindetail

rm.Theseformsneed notbeissuedfor

cticalmissions.Thereversesideof this

dailyandweeklypreventivemaintenance

mandatory.

.478,MWOANDMAJORUNITAS-

ECORDANDORGANIZATIONEQUIPMENT

for usewithallmotorvehicles.This

ssessionofsecondechelonpersonneland

pontransferandevacuationtohigher

ingmodificationormajorunit assembly

ecordclearlydescriptionofworkcompleted

rovided.•Whenmodificationiscompleted,

mileage,andMWOnumber.Whenmajor

ansmission,transfercase,andtracks)are

ursand/ormileage,andnomenclatureofunit

arts,andaccessoryreplacementswillnot

ormsandrecordsonvehicleswill befiled

478.

RMNo.30(OLDW.D.FORMNo.39),

CER.Thisformisused bytheclaimsofficer

onofmotoraccidents.

.9-69,SPOTCHECKINSPECTIONRE-

KANDTANK-LIKEWHEELEDVEHICLES.

llcommandingofficersortheirstaffrep-

otcheckinspectionsonfull-trackandtank-

9-73(OLDW.D.,O.O.FORMNo.

RATION—MOTORVEHICLE.Allvehicleswill

epartmentMotorVehicleCentralRecords

dnance—Detroit,Michigan.Registration

hingthisformin accordancewithAR850-10.

.9-75(OLDW.D.,O.O.FORMNo.

GRECORDOFMOTORVEHICLES.Thisform

yrecordofall vehiclesdispatched.

o.9-81(OLDW.D.,O.O.FORMNo.

ORUNITIDENTIFICATIONTAG.Thistagwill


/ h t t p : / / w w w . h





unserviceableparts,assemblies,subassem-

orlikeserviceableitems.

o.460,PREVENTIVEMAINTENANCE

OFORMNo.6,DUTYROSTER).Thisform

gandmaintainingarecordofmotorvehicle

monthlyandsemi-annually).Itmaybe

s.

o.462,PREVENTIVEMAINTENANCE

LINSPECTIONWORKSHEETFORFULL-TRACK

DVEHICLES.Thisformwillbe usedforall

ntenanceservicesandforalltechnical

es.

d4).The90-mmgunmotorcarriage

track-layingvehiclepoweredbyatwin

nd 39).Thepowerunitconsistsoftwo

-cooledDieselengines,mountedside-by-side

rtmentattherear ofthevehicle.The

wardandonereverse.It issteeredand

rticalleversin thedriver'scompartment

dentifiedby itsflattophull withsloping

gturretsides.Bossesweldedto thehull

orattachingauxiliaryarmorplate.Ver-

ed,with4Vi-inchspacersattachedtothe

extendedendconnectorsontheinside of

outside.Thecastarmorsteel turretis

topcoverandan extraplateofarmor

eld.Theturret canbetraversed360

rbyhydraulicpower.

entofthe90-mmgunmotorcarriage

mgunM3 andacaliber.50antiaircraft

personnelarmamentconsistsofcaliber

M1928A1submachinegun,andfrag-

nicationSystems.Thevehicleis

mitterandreceiverforcommunicatingwith

anintercommunicationsystemispro-

andcrew.


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/ h t t p : / / w w w . h





NMODELS.

iclehasanidentificationplateinthe

achedtotheleftsideofthe hull.Thisplate

umber,manufacturer'sname,andoperating

berisstampedon allfourtowingbrackets

identificationplate.

ences.Thevehiclemaybepowered

sumpengines,thewetsumpenginecarry-

oilin thesumporoil panoftheengine,

quiring separatelubricatingoiltanksto

goilsupply.

n.

shield)10ft

n.

91in.

)66,000Ib

d(onhardroadsurface)2 5mph

nespeed(noload)2,100rpm

gability50pet

ngability50pet

attankwillcross 90in.

e,suchaswall,thattank

tlowestforwardspeed)42in.

x).7mipergal

city164qt

20qt

only)'. 28qt

0

-99


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SSORIES

reforinformationonlyand mustnot

isition.Whenorderingon-vehiclematerial,

ORD7SNLG-237.

-1277)

ch-point

carrier

1286)

outhandle)

(41-S-3170)

e-face,10-lb

C-1124)

rip,Vi-in.sq

-200)

drive,10-in.

45-205)

545-210)

(41-F-1028)

41-F-1572)

ectingand

997-86)

allpeen,32-oz

ee,Vi-in.sqdrive,

)


/ h t t p : / / w w w . h





aries

ceMark

3/4-in.sqdrive,

)

drive,12-in.

ble,Vi-in.sq

qdrive,17-in.

rive

oint,8-in.

(41-P-1839)

s,5-in.blade

rpose,I1/?-in.

rpose,l3/4-in.

etic)

gle-end,8-in.

gle-end,12-in.

e-hd,alloysteel,

0)

e-hd,alloysteel,

0)

e-hd,alloysteel, P u b l i c D o m a i n , G o o g l e - d i g i t i z e d

/ h t t p : / / w w w . h





rawingStowage

e MarkLocation

%^-in.hexIntoolbag

Vs-in.hexIntool bag

*i,;-in.hexIntoolbag

Vi-in.hexIntool bag

%,.,-in.hexIntoolbag

3/s-in.hexIntoolbag

s/s-in.hexIntoolbag

qdrive,%-in.Intool bag

qdrive,7i,;-in.Intool bag

qdrive,Vi-in.hexIn toolbag

qdrive,'/^,|-in.Intoolbag

qdrive,5/s-in.hexIn toolbag

sqdrive,%-in.Intool bag

qdrive,%-in.hexIn toolbag

qdrive,1% (i-in.Intoolbag

sqdrive,1-in.hexIn toolbag

qdrive,I'/in-in.In toolbag

qdrive,IVfe-in.In toolbag

.sqdrive,IVi-in.Intool bag

gOnrearplate


/ h t t p : / / w w w . h





ries

rawingStowage

ceMarkLocation

removingIntoolbox

oving(B163479)Intoolbox

GUNM2.

M2(D28242)Intoolbox

T.

hCOVERBlanketrollrack—

earoftank

sedof:Rightturretwall

ksonly),Inbox—mounted

ox

flare,

e,M18A1

,flare,

e,flare,

nsistingof:Onturretbustle

hand,M9Underfloor

mmandtanks


/ h t t p : / / w w w . h





10orBritish

C-99

consistingof:

CO.,

rationsfor5men

onsfor5men

verbreech,

FormNo.5825

6866)

4)W/STAFFand

1980)

667)

C87666)

(C106252)

05)

CLAX7)


/ h t t p : / / w w w . h





ries

rawingStowage

ceMarkLocation

.AXS-808)(inIncan

ssD, Spec.

nloadingBracketonengine

6535)Intoolbox under

Muzzle— Intoolbox,right

Brearlowerhull

Instructionbag

Intoolbox,right

1669)Intoolbox,right

GUNM2,HB,FLEXIBLE.

34338)In toolboxunder

-rd,cal..50Bracketunder

0,M4(C4037)In toolboxunder

(C64274)Intool boxunder

,Ml(C61331)In toolboxunder

91031)Onsparebarrel

egun(D91030)Oncal..50

al..50,M3Bracketonturret

Ml(w/ocon-Intool boxunder

artridgeIntoolboxunder

gunmountOnmount

machinegunM3Strappedto topof


/ h t t p : / / w w w . h





rawingStowage

ceMarkLocation

8514)In toolboxunder

M7(D35441)Intoolbox under

(82-0-41)Incal..50M2

1)Rearofdriver

36-1-1)Inlongitudinal

670752)Ongunmount

ete,composedof:Oneinsponson

rightofassistant

44160)driver,onein

nquadrant)Inbox(CIO1039)

690527)Onhullsubfloor

squadrant,MlBracketinturret

ope(D40871)Onturretbasket

26208)Ontelescope

(spare)In boxesnearas-

stantdriver

opereticleInbox(C101039)

complete,com-

D46089)

A179389)

4(D43977)


/ h t t p : / / w w w . h





rial

forelevation

D105285)(for

)

D84221)(for

orM39C(for

scope,T104E1

(90-162)

2-331)

ete,composed

401

2)

M9(92-31)

Ml(15-12M)

S-393A-1)

dard)orM76D

-231)

,M12(91-92)

osetype,lubricat-

nating,1l/2-qt,M2


/ h t t p : / / w w w . h





rawing

ceMark

cable

936(2-3-16)

putin flash-

mentlights)

dbulbstowage

18-qt(1-8-9)

0-ft(B208591)

UPandCOVER

NLG-237

QMCstandard

TL-122)

,A.G.O.,in

ntrack


/ h t t p : / / w w w . h





ries

670)

297)

flashlight)

epartsand

0machinegun

90-mmgunmotor

5)

n,shrimp,45ftx

(B169931)

D.(LO9-745)

7589)

ompass

179)

e,Ml941,1

manmili-

cessory

x50 in.(QADX1)

ab,4-in.width,

1)

de,30-ftroll

rriageM36B2


/ h t t p : / / w w w . h





rawingStowage

ceMarkLocation

63936)In toolbox

,10-ftrollIntool box

RTS.

ox

llingplugIn toolbox

n,assemblyIntoolbox

449)

s/s-in.,firing

ting)

5634)

.(BFAX1)Intoolbox

oolbox

lbox

der(A245998)Intoolbox

r(A25830)Intoolbox

1)In toolbox

unger(A25833)Intoolbox

er(A12535)Intool box

ng)(A25835)In toolbox

ntool box

tool box

GUNM2,HB,FLEXIBLE.

8269)Inbracketonturret

tool box

sembly(B8976)Intoolbox

B8959)Intoolbox


/ h t t p : / / w w w . h





ries

rawing

ceMark

r pivotstud

AX1)

BFAX1)

r(A13515)

PRINGASSEMBLY

onsistingof:

8914)

bly(B8961)

embly

bly

(A9351)

unger

l(A9522)

(B9741)

8908)

omatchtrack

3667)

55184)

nishedinaccord-

3(furnishedin

BSX4)

cordancewith


/ h t t p : / / w w w . h





NSTRUCTIONS

ationfortheguidanceofpersonnel

onofthis equipment.Itcontainsinforma-

elwithdescriptionand locationofcontrols

OFEQUIPMENT

tionedvehicleisfirstreceivedbythe

essaryforsecondechelonpersonnelto

hiclehasbeenproperlypreparedforservice

ion,andtobe sureitis inconditionto

chitmay beassignedwhenplacedin

nspectallassemblies,subassemblies,and

yareproperlyassembled,secure,clean,and

ubricated.Checkalltoolsandequipment

arts,andAccessories)tobe sureevery

ondition,clean,andproperlymountedor

ganizationwillperformarun-intest

0milesas directedinAR850-15,accord-

edinparagraph13below:

firstechelonpersonnel(driverorcrew)

nceoftheseservices.

ICIENCIES.

uringthecourseoftheseserviceswill

eswithinthescopeofthemaintenance

nizationbeforethevehicleis placedin

ondthescopeofthemaintenance

nizationtoa higherechelonforcorrection.

eriousnatureto theattentionofthe

oughproperchannels.


/ h t t p : / / w w w . h





quipment

S.

forethevehicleismovedtomakethe

nspectionsandserviceswillbeperformed

Seethatportableandfixedfireex-

rsarefullychargedandsecurelystowed.

,examinewiresealtoseethatit isintact.

,examinecontrolheadstomakesurethey

rshavebeendischargedorare damaged,

ders(pars.232aandb). Examinelines

mtosee iftheyarein goodcondition,and

medandnot clogged.

R.Fillmainengineandauxiliarygen-

hat engineoilisat theproperlevel.If

chedtothe engineoilfillercap,followthe

orestartingthe enginewhenitem19is

tlevelinwaterexpansiontanksandre-

periodwhenantifreezeis used,have

edandaddasneeded.

faccumulatedsedimentandwater

move,clean,andinstallfilterelement

ableamountofdirtorwateris present,

efueltank filter(par.68c).Washtank

landinstall(par.68 d).

vityandvoltagetestofbatteries

eras necessarytobringelectrolytelevel

pectterminalconnectionstobesure

and secure.

ANKCASEVENTILATOR.Removeen-

diesandelementsin Dieselfueloil,and

oirstocorrectlevelwithfresh engineoil

l.Install,makingsurecleanersarein good

ounted.Removeauxiliarygeneratorengine

elfueloilas prescribedinthelubrication

kingsurefilter isingoodconditionand

LTS.Inspectallaccessibleaccessories,

generators,regulators,startingmotors,

ors,andoilcoolertosee iftheyarein good

mbled,andsecurelyconnectedormounted.

beltsfordamageandbesure adjustment

ressuredeflection.

Examineallaccessiblewiringand

ingoodcondition,securelyconnected,


/ h t t p : / / w w w . h





uctions

gnmaterialfromtracksandsuspen-

blocksfordamage,loosewedges,nuts,or

onhardlevelsurface,seethattracksare

djusted(par.156b).Tracksagshouldbe

rethan3Ainch asmeasuredmidwaybe-

dsupportrollers.

DFLANGENUTS.Seethatsprocket,

portrollerassemblies,mountingandflange

e.

enders,horn,andlightguardstosee

ditionandsecure.

ONS.Inspectpintlehook,cables,andall

ditionandproperoperationoflatchandlock.

NDCAMOUFLAGENET.Seethatall

re,liftloops,doors,hatches,andtheirrelease

reingoodcondition,secure,andoperating

nandcamouflagenetarein goodcondi-

CAUTION:Donotfullyreleaseescape

ethathulldrain valvesopenandclose

o brightspotsonhull tocauseglareor

ble.

ectmountedperiscopeheadsand

ght,aswellasspares,to seethattheyare

n.Testeachperiscopetosee thatitwill

s,andlockthroughfullrange.Inspectperi-

sclean,ingoodcondition,andcontacts

eriscopesandwindowsusingonlya soft

acompletelubricationofthevehicle,

rdingtoinstructionsinthelubrication

rcasesandunits lubricatedorservicedin

gearcaseoillevelsandadd asneces-

vels.Changeonlyifconditionofoilindi-

isnotofproper gradeforexistingatmos-

E:Performitems(15)to(17)during

DSUSPENSION.Inspectallsuspension

nks,andguidesfordamageandsecurity.

supportrollers,andidler wheelstoseethat

sivelyatseals.Inspectall suspension

eparationfromwheels.Thevehiclesmay

ars withshippingbracketsandhold-down

odsmustberemovedbeforeoperationto


/ h t t p : / / w w w . h





pment

ension.Removethebracketsandrodsfrom

wospecialhex-headboltsin eachsuspen-

x-headboltsarecarriedina baginthe

nspectallshafts,arms,rods,connec-

ee thattheyareingood condition,correct-

d(par.142).Checkreleasedpositionof

stbeparalleland7 to7Viinchesfromface

.137).

NDUNIVERSALJOINTS.Inspectpro-

ointsto seethattheyareproperlyalined,

tleakingexcessivelyatseals.

erentialandtransmissionbreathers

condition,secure,andnotclogged.

artengines,observingallprecautions

fstartersengageand disengageproperly

dhaveadequatestartingspeed.Release

tlestoidleenginesat 1,000to1,200revolu-

rm-up.Startandtest auxiliarygenerator

sproperly.Whenenginesarewarmedup,

400 — 450revolutionsperminute.Accel-

makesuremaximumgovernedno-load

50revolutionsperminute.

the engineswarmedup,oilpres-

undsat1,500to 2,100revolutionsper

nimumatidle speed.Ifoilpressureis too

on,orif redlowoilpressurewarningsignal

e1,000revolutionsper minute,stopen-

rrectconditionorreporttoproperauthority.

age.CAUTION:Donotmovevehi-

reshasreached60° F.Idealoperating

er normalclimaticconditions.Maximum

reis225° F.Highwatertemperaturered

htat temperaturesabovethemaximum

re,andenginesmustbestoppedandcon-

edtoproperauthority.

ermayshowahighcharge(+)after

eratorhasrestoredtothe batteriesthecur-

hchargingrateforan extendedperiod

,orfaultygeneratoror regulator.With

dalllampsand electricalaccessoriesturned

zeroreadingisnormal.


/ h t t p : / / w w w . h





uctions

torswitchismovedto "R"or"L"

uldregisterthe leveloffuelin thecorre-

etankswerefilledbeforeoperation,the

hometersmustregistercrankshaft

umulatingrevolutionswithoutexcessive

needlefluctuations.

Observewhetherenginerespondsto

torpromptlyandproperly,andnote

eloosenessorbindingin controls.

ELDWIPERS.Seethattheseunitsare

alsituationpermits,testhorn forproper

shield(driver'shood)is inuse,besure

;testwipertosee ifitoperatesproperly

assevenlyandfirmlythroughits fullstroke.

r.

thatallunitsare ingoodcondition

tionpermits,openandcloseall switches

ndproperly.

okundervehicle,inengine,andin

artmentsforindicationsoffuel,oil,or

eaksfoundtotheirsourceand correct

her authority.

ENT.ChecktoolsandOn-vehicleStow-

tobe sureallitemsare present,andsee

ndproperlymountedorstowed.

efollowingprocedures(1)to(11)

estof thevehicle.Onvehicleswhich

or moreinthecourseof deliveryfromthe

ation,reducethelength oftheroadtestto

rytomaketheobservationsfollowing.

testofthevehiclecontinuousoperation

speedsbeyondthoserecommendedonthe

oided.

AGES.CAUTION:Donotmovevehi-

reshavereached60° F.Checkallperti-

ethey registertheproperfunctionofthe

Withthe vehicleinmotion,speedometer

eedandodometershouldrecordaccumu-

ststeeringleverstoseeif theyhave

velatextremetop,andsee thatlever

sinappliedpositionforparking.With


/ h t t p : / / w w w . h





quipment

kestosee iftheystopvehicleeffectively

calposition,andthatthey steervehicle

uldbeminimumfreetravelof2 inches

etingresistance.Clutchesshouldnotgrab,

ment,orslip whenfullyengagedunder

k-outtobesureit willfunctionproperly.

mentisproperlyequalized(par.129k).

hrougheachspeedrangeoftrans-

rgearshiftleveroperatesproperly,and

sualvibrationsornoises inanyspeedrange

e,excessivewear,loosemountings,orim-

t duringtestrunforany unsatisfac-

racteristics,suchasstalling,misfiring,lack

tion,orunusualnoisethat mightindicate

velyworn,orinadequatelylubricatedengine

alertforanyunusualnoisefrom

wertrainthatmightindicatelooseness,

orimproperlubrication.

ILEINTERVALSORLESSFORSERVICES

ehandcautiouslyoneachtrackwheel

bto seewhethertheyareabnormallyhot.

otouchwiththe hand,bearingsmaybe

damaged,orimproperlyadjusted.Check

esforoverheatingorexcessiveoilleaks.

ngine,indriver'sand fightingcom-

cleforfuel,oil,andwaterleaks.Traceall

orrector reportthem.

DTRAVERSINGMECHANISM).Disen-

placevehicleona10-degreelateralincline

geturretlock,andproceedwiththefollow-

andandpowercontrols,traversethetur-

greerangeandobservewhetherthereisany

thegunpointedforwardor rearward,

irerange toseeiftherei sanybinding,

ction.Atcompletionoftests,besure that

ualposition,andgunbreechandbarrel

ockareengaged.

hecktracktensiontoseeifitis

-to- %-inchsagbetweencenterandrear

devicesaresecure.


/ h t t p : / / w w w . h





uctions

dReports.

atvehicleoperator'smanual,lubrica-

No.26(Driver'sReport— Accident,

dW.D.,A.G.O.FormNo.478(MWOand

acementRecord),areinthevehicle,

ed.NOTE:U.S.A.registrationnumber

emustbefilledinon FormNo.478fornew

etionoftheRun-inTest,corrector

ted.Reportgeneralconditionofthevehicle

authority.

ENTS

GCONTROLS.

describes,locates,andprovidesin-

nofeachofthe controlsusedindrivingthe

istantdriver'sstationsareshownin figures

mentsandcontrolsinvehicularoperation

g.7).The12-voltmasterswitch,

itchboxbehindthe.driver'sseat,controls

eatercoils.Toturnswitchon,pull handle

verticalposition;thenreleaseswitch,

lthewayin.To turnswitchoff,pull

n turnitto horizontalpositionandrelease,

g.7).The24-voltmasterswitch,

controlsthe24-voltcurrentto thevarious

cle.Theswitchmustbe turnedto"ON"

he electricalunitsexcepttheairheaters.

ned to"OFF"positionwheneitherofthe

Alwaysturnswitchto"OFF"position

eelectricalunits orwirestopreventarcing,

damagetheequipment.Toturnswitch

ameasthe12-voltmasterswitch(subpar.

).Theacceleratorpedalislocated

ightfootnear thefloorofthedrivers'

eratorisusedto controltheamountoffuel

whendrivingthevehicle.Depressingthe


/ h t t p : / / w w w . h





ER

R

n

fuelto theinjectors,therebyraisingengine

eleasingthepedaldecreasestheflowof

the pedalisreleased,thegovernoraction

the engines.

s(fig.5). Twoairheaterpumps,

ountedona bracketonthedifferential

dto supplyfueltothetwoair heaterson

theenginesattemperaturesbelow40° F.


/ h t t p : / / w w w . h





ucttons

ALBOX

ERISCOPE

AGESTRAP

DSSTOWAGEBOX

EAT

er'sStation

p,workpumpplungerknob inandout

erenginestarts,pushplungerin tolocked

fValve(fig.5).The shut-offvalve

wo airheaterpumps.Thevalveisused

obothairheater pumps.Itiskeptclosed

eingoperated,topreventair bleedinginto

nimizethedangeroffuelleaks.Tooperate

nteris alinedwitheither"ON"or"OFF."


/ h t t p : / / w w w . h





D

RSWITCHCABLE

Box

12).Twoair heaterswitches,one

tedinthe lowerrightcorneroftheinstru-

heleft controlsthe12-voltcurrentto

upplythe high-tensioncurrentforigniting

LC)engine.Theswitchtothe right

eatersin theright(LA)engines.Toturn

obcounterclockwiseuntilarrowpointsto

tateknobclockwiseuntilarrowpoints

.Reset-typecircuitbreakersare

rotectthevariouselectricalcircuitsagainst

Fiveofthesecircuitbreakersarelocated

.12), twointhemasterswitchbox(fig.

neratorcontrolbox(fig.236),andfourin

enthecircuitbecomesoverloaded,the

opensthecircuit.Toresetthecircuit

drelease.CAUTION:Donothold but-

magethewires ofelectricalunits.Ifbutton

hecauseofthe overloadinthecircuit

circuitbreaker.


/ h t t p : / / w w w . h





iicffOits

ontrols

(fig.9).Thetwoclutchlock-out

ne,aremountedatthe topofthethrottle

usedtoholdone orbothclutchesdisen-

thenginescanbestartedor operatedinde-

edfromthepropellershaftwithoutholding

d.

clutchpedal,convenienttothe

tedbylinkageto theclutchineachengine.

ngagesbothclutches,anddisconnectsthe

ellershaftand fromeachother.Both

lowingthepedaltoreturn toraisedposi-

he drivers'doors,whichcoverthe

onabovethe driver'sandassistantdriver's

dposition fromtheinsidebylatchrelease,

onby aspring-loadedboltlockwhichlocks

ened.Toopenthedoor,movelatchre-

icleandraisedooruntil lockinglatchpin

pin.Toclosedoor,pulldownon doorlatch


/ h t t p : / / w w w . h





ON

ENNECES-

EINDE-

EDAL

KOUTS

TEN-

ESSARY

ts

nto closedposition.Movelatchrelease

olt issecurelyenteredinbosson door.

drivinglight switch,mountedin

heinstrumentpanel(fig.12),controlsthe

asfivepositionsincluding"OFF."Itis

tontopreventthe switchbeingturned

ackoutmarkerlightposition.Pressthe

chintoanypositionother than"BOMK"

ve.Thisvalveislocatedat theright

sideofthebulkhead(fig.136)and is

f tanksfromwhichfuelisto beused.

elgageindicatesthatoneupperfuel tank


/ h t t p : / / w w w . h





uctions

OB

ctorvalvemust beturnedtotheother set

econtrolswitchmust besettocorrespond

ectorvalve.Alwaysturnfuel tankselec-

whenvehicleisnot tobeoperated.This

ossoffueldue toleaksandpreventinjec-

combustionchambers.

h(fig.12).Thefuel gagecontrol

htendof theinstrumentpanel,isusedto

rieswith eitherofthefuelgage tankunits.

rked"L"toread fuellevelintheupper

thevehicleandthe"R"positionfor the

eswitchdoesnothaveanoff position.

Thegearshiftleveris mountedon

ssionconvenienttothedriver'srighthand.

tandshiftintothe fiveforwardandonere-

al.Thelever isprovidedwithalatch

essedwhenshiftingintofirst orreverse

horn switch,mountedjustbelow

nglever,isused tooperatethehorn.Press

dhorn.

witch(fig.12).Theinstrument

edintheupper leftcorneroftheinstrument


/ h t t p : / / w w w . h





cyofthefourinstrumentpanel lights.This

vepositionsfrom"OFF"to"BRIGHT."

ghton, movepointerfrom"OFF"position

ween"DIM"and"BRIGHT"untilthede-

ed.Turnpointerto "OFF"positionwhen

8).Theparkingbrake pedalis

driver'srightfootat thebaseofthesteering

operatethequadrantswhichholdthe

pliedposition.Theparkingbrake should

ehicleisstoppedandleft unattended.To

sdownonpedalfrontpad andpullback

teeringlevers untilquadrantslockthe

Toreleaseparkingbrake,pull backon

ckdownonparkingbrake pedalrearpad.

es(fig.43).Twobuttonswitches,

ountedonthe rearofthebulkheadin the

eseauxiliaryswitchesareusedtooperate

fromwithin theenginecompartment.Press

tartthe engineonsamesideofthe vehicle.

.Twobutton-typestarterswitches,

ountedinthe lowerrightcornerofthein-

andswitchisusedto starttheLCengine

cle,andtheright-handswitchto startthe

e.Pressonlyoneswitchbuttonat atime

heenginestarts.Neverholdthe button

econdsata time,astodoso willoverload

the commutatororarmaturewindingsto

ot startwithinthe30 seconds,investigate

rdstarting beforeagainoperatingthe

Thetwosteering leversinfrontof

ctedbylinkageto thesteeringbrakesinthe

gbackoneitherleverappliesthe brake

nsame sideofthevehicle.Thespeedof

de increasesandcausesthevehicletoturn

e brakehasbeenapplied.Pullingback

sor stopsthevehicle,dependingonthe

sareapplied.

ethrottlelever, mountedinthe

rovidesufficientfuel forstartingand

ingenginespeedwhenthevehicleis not

f thefueltothe injectorstostoptheen-

in idlingpositionforstartingthe engines,


/ h t t p : / / w w w . h





uctions

rS-

Chart


/ h t t p : / / w w w . h





subpar.wbelow)andmovethe throttle

enslowlypullitbackuntil theidlingposi-

e enginesatspeedsabovethegovernor

owlymovethrottleleverforwardbeyond

he desiredspeedisreachedandlockthe

ION:Useacceleratorpedalandnot

thevehicle.Tostoptheengines,returnthe

"positionbymovingtheleverforward

ionandpullingit backagainstthestop

.5).Theshortlever totherightof

olockthethrottlewhenoperatingthe en-

normalidling speed.Tolockthethrottle

klever.Pullbackon locklevertorelease

N:Releasethrottlelockbeforeattempt-

geControlSwitch(fig.12).The

ontrolswitch,mountedontheinstrument

vinglightswitch,isused toconnectthe

withthesendingunitin eitherenginewater

tothe"L"positionto readthewater

manifoldontheLC engineontheleftside

itchtothe "R"positiontoreadthetem-

n therightside.Operatetheswitch

vehicleisbeingdriventocheckthe

engines.

TROLSANDEQUIPMENT.

controlsanditemsofequipmentnot

troloroperationof thevehiclearedescribed

ctionsgivenfor theiroperation.

tch.Thedrivers'compartmentis

ht,whichis securedtothehulltop plate

trolledbyitsowntoggle-typeswitch.To

switchlever.

iver'sSeats(fig.13). Seatsare

ms,pivotedonlowerhullside plates,so

ered.Seatsalsoareadjustableforwardand

olduponreleaselever underfrontcorner

ndseatwillraisewhenbodyweight isre-

tiallyremovebodyweight,holdupon

atdownbybodyweight.To adjustfor-

onadjustinglever underinnerfrontcorner

edintodesiredposition.


/ h t t p : / / w w w . h





uctions


/ h t t p : / / w w w . h





/ h t t p : / / w w w . h





uctions

isauxiliaryexit inthedrivers'

tlybehindtheassistantdriver'sseat.To

ndlewhichallowsthedoor todrop.Door

placewiththe handlesandsettingthe

4).Six poppet-typehulldrain

valvesarelocatedinthedrivers' compart-

mpartmentfloor,and,twobeneaththe

or.Thesevalvescanbelockedintheopen

tervalveis presseddown.Acompression

position.The valvesintheenginecom-

edbyremotecontrolhandlesandcannot

opesinthedrivers'compartment

eindirectvisionwhenoperatingthevehicle

periscopesinthe drivers'doorsare

canbetraversed360degrees(fig. 10).All

nbetiltedto raiseorlowerthefield of

equippedwithreplaceableheads,which

enstruckso asnottodeflectthe missle

erisequippedwith adoor,whichis

copeisnot installed.Awiperbladeonthe

ocleanthewindowin theperiscopehead.

ed,operated,andstowedasfollows:

HOLDER.Unscrewthehousingknob

Ainch andremoveperiscopefromstow-

slide thelatchallthewayout toward

scopeintoholderas faraspossible.

slidelatchall thewayintowardcenter

entheperiscopeholder(adjusting)

dertodesiredpositiontoraise orlower

btoincreasetensionor lockperiscope

ion.Whenperiscopeis removed,push

ayforwardandlockinout-of-wayposition.

ELoosenperiscopeholderknob(fig.

rto desiredposition.Tightenknobto

riscopeinthedesired horizontalposition.

ADWINDOW.Whenperiscopehead

ilevehicleisbeingoperated,usewiperto


/ h t t p : / / w w w . h





SELEVER

RD)(UPANDDOWN)


/ h t t p : / / w w w . h





uctions

wthehousingknobatfrontof holder,and

nuntil thewindowisclean.Moveperi-

ighten theknob.

ERISCOPE.Slidelatchatfrontof

romcenter.Loosenhousingknobonbody

rawtheperiscopefromholder.Slide

on.Placeperiscopeinstowageboxand

urely.


/ h t t p : / / w w w . h





nandlocationofthevariousinstru-

ddriving thevehiclearegiveninthe fol-

equentreferencetoallinstrumentsmust

s inoperationinorderto detectanyun-

otcorrected,mightcausedamageor

vehicle.Althoughthestandardreadings

dget toknowhisvehiclesothat through

dthe instrumentreadingshecanquickly

oryconditions.

mmeter,mountedontheinstru-

umentpanellightswitch,is usedtoindi-

winginto oroutofthe batteries.The

arkedwithaplussign,indicatesthe rate

0 amperes.Thescaletotheleftindicates

th the24-voltmasterswitchturnedon

sturned off,theammeterwillread"0"un-

eisa groundinoneofthe electricalsystems.

adischarge(-)readingas thevarious

onindividually,ifthe unitisoperating

esarefullychargedandnone ofthe

ng,theammeterwillshowonlya very

.Whenthebatteriesaredischargedor

sarein use,theammeterwillindicatea

sof50 amperesifthegeneratorregulator

uel gage,mountedontheinstru-

nglight switch,indicatestheleveloffuel

anks,dependingonthesettingof thefuel

nthe24-voltmasterswitchisturnedoff,

ybelow the"E"mark.Whenthe24-volt

the needlewillmovequicklytothe"E"

kisempty,orto thepositionwhichindi-

etank.

.12).Twooil pressuregages,one

tedontheinstrumentpanel betweenthe

eraturegage.Thegagetotheleft indicates

persquareinchinthe LCengineonthe

egagetotherightregisters oilpressure

htside.Thenormalsafe operatingpres-

d50 poundspersquareinchwhentheen-

ormaloperatingtemperatureatspeeds


/ h t t p : / / w w w . h





ructions

tionsperminute.Whenthe enginesare

stshowa readingof4to 5poundswithin

Thespeedometer,mountedonthe

tpanelatthebottom,registersvehiclespeed

umulatedmileagetraveled,andthemileage

enthofa mile.Theknobinthefaceof

oreset thetripodometer.Pushinand turn

rto zero.

wotachometers,oneforeachen-

ottomof theinstrumentpanel.Theta-

CHOMETER"registerscrankshaftspeedin

erminuteandaccumulatedrevolutionsin

eonthe leftsideofthevehicle.The

TACHOMETER"inthesamemannerindi-

dandrevolutionsfortheLAengineon the

rsarecalibratedtoindicatethesame

00revolutionsperminutewithbothclutches

ndicatedspeedshouldbenotedandtaken

omparingtachometerreadingswhilesyn-

ches.Withbothclutcheslockedoutand

ectidlingspeedis400 to450revolutions

mustbesynchronizedtorun theengines

ethan 200revolutionsperminutefrom

perminute.Thecorrectoperatingspeed

olutionsperminute.Theno-loadmaximum-

evolutionsperminuteandthe full-load

dis2,100revolutionsperminute.

ge(fig.12).Thewatertemperature

rumentpaneltothe leftofthefuel gage,

eofthewaterinthe watermanifoldon

onthepositionofthe watertemperature

egisterstemperaturesfrom60° to260° F.

east60° Fbeforedrivingthevehicle.

operatingtemperatureisexceeded,the

ngsignalcomeson(subpar.hbelow).

OilPressureWarningSignal(fig.

reandoilpressurewarningsignal,

ornerof theinstrumentpanel,comeson

ureexceeds232° Fortheoil pressuredrops

ngine.With theenginesstopped,the

henthe24-voltmasterswitchisturnedon.

thisas aremindertoturnthe 24-volt

inesare nottobestarted oranyofthe


/ h t t p : / / w w w . h





ARYCONDITIONS

SANDCONTROLSINVEHICULAR

Equipment.Beforeaneworre-

edinservice,besurethat theservices

1,12,and13 havebeenperformed.

ces.Performtheservicesinsteps1

eattemptingtostarttheengine.Start and

below),andcompletetheBefore-oper-

ginelubricatingoil,water,andfueltanks

eraturesAbove40° F.

partmentdoorshuttersareopen.

valveto eitherrightorleft position

switch(fig. 7).

seat andadjustseatsothat driving

fficiently.

witchto positioncorrespondingwith

d(fig.12).

eris inneutralandparkingbrakeis

(fig.9).Hold clutchpedaldepressed.

dpull outlock-outbuttonsoneatatime.

dmovethrottleleverinto idling

terswitchbutton (fig.12).NOTE:

time.Donotstartsecondengineuntil

thly.Observeeachengineoilpressuregage

poundspressureisindicatedwithin30

eisstarted.Thesecondenginecanbe

gineaccordingtoprocedurein subpar-

inecanbe startedbytowingthevehicle

8.

nenginesat 1,000to1,200revolu-

rtemperaturereachesatleast 60° F.

sarewarmingup.

readings,whichmustnotvarymore

inute.Bothengineoil pressuregages


/ h t t p : / / w w w . h





uctions

K

NTDOORS

TLEFT

ONTANK

ICATING

VER

RICATING

VER

RFUEL

SIONTANK

T

ENT

opView

ounds,lowoilpressurewarningsignal light

mustindicatea rateofcharge.

Holdreleasebuttonsin,and pushin

eatatime.Slowlyreleaseclutchpedal

husdrivingthetransmissionin neutralto

wertrainlubricatingoil.

aturegageindicates60° F,operate

switchtoseethatbothenginesare wanned


/ h t t p : / / w w w . h





yCondition»

g position.Thevehicleisnow

f below).

peraturesBelow40° F.

teps(1) through(7)insubpar-

TE:Afterenginefires,closethrottle

,200revolutionsperminuteduringwarm-

hut-offvalveleverto"ON"position

switchbyturningswitchknobto left

pump(fig. 5)withonehandand,at

erswitchbutton.

air heaterpumpplungeralltheway

r switch.Turnairheaterpumpshut-off

onafterbothenginesarestarted.

teps(10) through(14)insubpar-

cted,userunningenginetostart

thertoreducestarterdrain onbatteries

t SecondEngine.Thismethod

thebatterieswhencrankingenginesincold

d ifstarteronsecondenginedoesnot

asdescribedin subparagraphsc(1)

eclutchlock-nutonrunningengineand

1,200revolutionsper minute,longenough

ricatingoil. Depressandholddown

ondengineclutchlock-out.Accelerate

sametime, slowlyreleaseclutchpedal.

anksecondenginefor30 secondsonly,at

CAUTION://secondengineseems

ediatelydisengageclutch.Ifsecondengine

onds,discontinuecrankinganddetermine

ttemperaturesbelow40° F,useaif

secondengine(subpar.d(3)through

ondenginefires, setthrottletooperate

lutionsperminuteuntil bothengineshave

.

(fig.8).


/ h t t p : / / w w w . h





uctions

erPositions

hiftintosecondgear(fig. 16)when

elterrainwithhard surface.Whenstarting

undorsnow,depresslatchbuttonand shift

500revolutionsperminuteanden-

uallywithoutslipping.Afterclutchesare

vehicleto5milesperhourin secondgear

ear.

edalanddecelerateengineswhile

ear.Followrecommendedvehicleand

mberplate.Whenshiftingi ntoanysetof

erwithadeliberate,positivemovement.Do

tch."CAUTION:Donot"ride"clutch

chwillpermitenginestooperatein

ngefrom1,500to 2,100revolutionsper

ngesgivenon theserialnumberplate.

vevehicleorturnsprocketsbymeans


/ h t t p : / / w w w . h





yConditions

arters,asseriousdamagetothecommuta-

N.Whenclimbinggrades,itisneces-

peedtoprovideincreasedpowerandto

s.Frequently,itisnecessarytoshift into

dinggradestotakefull advantageofengine

oassistinbraking.Whenclimbinggrades,

ehiclespeeddropssufficientlytomakeit

up thevehicleload.Toshiftdown,de-

rtsteadypressureon shiftlever.Acceler-

ftingwill permitquickershift.

E.Alwaysbringvehicletoacomplete

versegear.Holddown safetybuttonon

reverse(figs.5and16).In reverse,do

exceed1,800revolutionsperminute.

anygreatdistance,aspowertrainpressure

erativeinreverse.WARNING:When

alwaysstationaguideoutin frontbefore

E.Pullingbackontheright lever

andpermits thelefttracktospeedup,

oturnto theright.Pullingbackonthe left

e left.Pullonsteeringleverintermit-

adofholdingbrakeconstantlyapplied.

esandavoidsunnecessaryheatingofbrake

aquick,sharpturn,pullhard onsteering

turnis tobemadeandaccelerateengines.

ceappliedandthe greatertheengine

.CAUTION:Steeringleversmustalways

ullyreleasedpositionexceptwheninuse.

adonlevelground,keephands offsteering

to avoiddraggingthebrakes.Dragging

ssarywearandgreatlyreduceslininglife.

ngstobecomeglazed,andthis condition

ess.

Vehicle.Toslow downorstopthe

torandpullbackevenlyonbothsteering

chpedaluntil vehicleisalmoststopped.

dpermitsbettercontrolofthevehicle.De-

drag"ofvehiclestallsengines.After

nsmissionintoneutralandset parking

singtheenginestoassistin braking,

sothatspeedofvehicleneverexceedsthe

sed,asshownonvehicleserialnumberplate.


/ h t t p : / / w w w . h





uctions

ehiclehas beenoperatedorif

above180° F,allowenginestoidle at1,000

nutefor5 minutestodissipateheatfrom

dleenginesmomentarilybeforestopping.

fromhighspeedswilloverloadthe gover-

dpossiblycausedamage.Tostopengines,

headof theidlingposition,notover800

d,withaquickmotion,immediatelysnap

L"position.Purposeoffirstpushing

tionis totakeupanyslackin the

sto beleftstandingfora considerable

ntrolvalves"OFF,"andopen24-volt

esarestopped.Ifaboveproceduredoes

ocedure.Ifenginesstill donotstop,shift

edandstall enginesbyreleasingtheclutch

kesapplied.CAUTION://engineshad

ndcorrectthecauseof failuretostopbefore

towinglugsare weldedtothefront

fig.1) andtwoontherear lowerhull

wingpinwithhandleora towinghookis

achvehicleis equippedwitha20-foot

gpintleis boltedtotherearlower hull

otowasupplytrailer orothervehicles

TION:Donotusepintlefor towinga

dinexcessof 10,000pounds.Thetowing

achedtoeitherthe frontorrearofthe

wingbarcan alsobeusedtobacka dis-

.

controlsofthe towedvehiclewhen-

owingbar(8-B-50-25)mustbeusedin-

Startthe towingvehicleinmotionslowly

owingcables.Keepsteadystrainoncables

omotion.Avoidjerkingtowedvehicle,as

ingcable.Usegearratios lowenoughto

luggingengines.Driveroftowedvehicle

sary,tomaintainstrainon towingcablesat

directionbya seriesofshortturnsso

s possibleinlinewithtowingvehicle.

blesfromrubbingagainsttrack,which

blesandtrackblocks.Ifnecessary,install

etoprovideadditionaltraction.CAUTION:


/ h t t p : / / w w w . h





yCondition!

arTowingHooks

mustbeclosedif vehicleisbeingtowed

nce.Installtowinglinksifavailable.

eofa mileormore,alwaysshiftthe

vehicleintofifthspeed,and disengagethe

clutchesorby disconnectingtheuniversal

dof thepropellershaft.Unlessthisis

pumpwillnot operate,anddamagetothe

eddifferentialislikelytoresultfrom lack

ransmissionoilpumpisdrivenby

werinputshaft,andthereforewill not

nputshaftis rotating.

es.Twocablesmustbeusedfor

gencywhereonlyonecableisavailable.

bleeyesbetweenlugsso thetwocables

s.If towinghooksareprovided,hookthe

nghook(fig. 17).Ifonlyonetowingcable

e samesideofbothvehicles.Donot use

ssedand loopedthroughthetowinglugs,

ntlykinkthecableandbreakthewire

Beforetowingthevehicle,check

coolant.Alsomakesure enginesarein

ckoutoneclutch.Stationdriverin


/ h t t p : / / w w w . h





uctions

rottleslightlyahead of"IDLING"posi-

ofifthgear,and holdclutchpedaldown.

art.Whentowingspeedis approximately

clutchpedalquickly.Ifenginedoesnot

ards,depressclutchpedalandreturn

ion.Continuetowingforanother200

ngpreliminaryoperations.Ifenginedoes

,investigatecauseoffailure.Assoonas

heclutch,andsignaltowingvehicletostop.

o 1,200revolutionsperminute(engine

ve50° F)andthenusethe runningengine

.17 e).NOTE:Useairheatersif air

F.Inextremelycoldweather,towvehicle

hthrottlein"NO-FUEL"positionand

o loosencoldlubricantbeforeattempting

e.Inspectconditionofvehicletobe

eritcanbetowedwithoutcausingfurther

sionoilleveltomakesuresufficientlubrica-

epowertrainunit.Whenvehicleis being

hesmustbelockedoutandthetransmission

nsmissionoilpumpwill supplylubricant

bpar.h(2)above).CAUTION:Donot

ove12 milesperhour.Avehiclemust

furtherthanisabsolutelynecessaryto

edforward.Transmissionmustbein

lebackward.

PERATION

rdescriptionandoperationofthe

fertoPartfour.

eturret canbesecuredagainst

rationoftheturretlockwhichis mounted

htof thegunner.Todisengagetheturret

utandturn counterclockwise.Tolockthe

herightorclockwise,anditwill automati-

essary,manuallytraversetheturret

eeth aremeshedwithturretlock.


/ h t t p : / / w w w . h





tion

OPE

EL

R

ECONTROLHANDLE

ER

KEHANDLE

s


/ h t t p : / / w w w . h





ipment

ngtheturret,besurethatbothdrivers'

he gunwillclearallobstructions.Gripthe

olhandleandbrakereleaseleverto re-

rbox.Turnthebrakecontrolhandleto

.NOTE:Thespeedofturretrotations

ithwhichhandleis operated.Releasethe

rakereleaselevertohold turretstationary.

turret lockwhenthereisnofurther

gearshiftingleverinitsupperor

etheturretlock.Turnbatterymaster

rnontheturret traversingmotorswitch

ox)tostart theelectricdrivemotor.

secontrolhandleandtwistto theright

onofturret rotationdesired.CAUTION:

aversingmotorswitchoff,movethegear-

alpositiontopreventaccidentalrotation

positionwithturretlockwhenneedfor

YEQUIPMENT

R.

aryengineandgeneratorisprovided

tteriesduringperiodswhenthe main

suresanadequatesupplyofcurrentat

electricalequipment,suchashydraulic

unfiringsolenoids,radio,etc.Itisequipped

lforautomaticchoking.

risdrivenby a4-cycle,single-cylinder

6horsepowerat2,300revolutionsper

ma fueltankwhichismountedin

mentforwardofthemainfuel tank(fig.

ts.

er,calibratedfrom50amperesdis-

rge,ismountedin thecontrolbox(fig.

to indicatetherateofchargeor dis-

risoperating.Withall otherelectrical


/ h t t p : / / w w w . h





uctions


/ h t t p : / / w w w . h





ipment

atteriesfullycharged,theammeterwill

ngrateexceptforthefirstfew minutes

tarted.The ammeterwillnotindicate

n 50ampereswiththebatteriesdis-

tsturnedon unlesstheauxiliarygen-

ve.

Aspiralspringautomaticchoke

etor,isused toprovidearicherfuel mix-

eratorenginein coldweather.Efficiency

pendsonproperadjustment(par.225b).

E.Afuelshut-offvalve,installedin

ingcompartmentbulkhead(fig.136),is

ffueltothe enginewhenthegeneratoris

enthevalve,turn thevalvehandle

veisfully opened.Toclosevalve,turn

tilvalveisfullyclosed.

pliedto theauxiliarygenerator

ntedintherightenginecompartment

ainfuelsupplytank(fig. 237).Abuilt-in

eavesthetank,beforeenteringthe car-

rtropewitha gripattachedispro-

liarygeneratorenginewhenthebatteries

getostart theengineelectrically.

estartingswitchonthegenerator

)isused tostarttheengineelectrically.

whichreturnstooffpositionwhenre-

ctrically,pressinon startingswitchand

res.

utton-typestopswitch,mountedin

235),is usedtostoptheengine.To

witchbutton,holduntilenginehas stopped,

n.

PERATION.

sagesaroundtheblockandcylinder

ucted.

ationoildrain plugistight.

kcaseisfilledto fullmarkonbayonet

engineoil(fig. 19).Crankcasecapacity

emustbeon levelsurfacewhen


/ h t t p : / / w w w . h





uctions

lsupplylinevalveis open,andthat

entsupplyofgasoline.

heauxiliarygeneratoriscontrolled

ichismountedabovethe auxiliarygen-

ush thebuttonmarked"START."To

ked"STOP."Ammeter,mountedtothe

uttons,indicatesthecurrentoutputofthe

OLD.Inextremecoldweather,if

atoo nearlydischargedbatteryprevents

uldbeassisted withthecrankingropeas

aroundcrankingpulley,afterin-

he ropeintheslot inthepulley(fig.19).

n and,atthesametime,givethe

It maybenecessarytorepeatseveral

tingbuttonmustbedepressedduring

uretoestablishtheignitioncircuit.

TERIESARENEARLYDISCHARGED.Occa-

bedischargedtoa pointwhereoutputis

gine,butenoughenergyexiststo supply

onditionexists,first "isolate"theignition

bleforbatterycurrentto"feedback"into

lishthis,proceedasfollows:Discon-

terminalon ignitioncoil(fig.19)-Con-

sitivecoil terminaltopositivebattery

alboard.Crankenginewithstartingrope.

rtingbuttonduringthis procedure.

to runlongenoughtochargebatteries

ne,removejumper,andconnectleadto

TERIESARECOMPLETELYDISCHARGED.

mpletelydischarged,anoutsidesourceof

ovided.Twelvevoltsofstoragebatteries

rthefollowingprocedure:Disconnect

nallead.Connectaleadfromignition coil

eterminalofoutsidebatterysource.Con-

erminalofoutside batterysourceto

eground.Crankenginewithstartingrope.

rtingbuttonduringthis procedure.After

while,instantaneouslyandsimultaneously,

atterysourceleadfromignitioncoilposi-

ctignitioncoilpositiveterminalleadin

moveleadfromenginegroundand dis-

ource.


/ h t t p : / / w w w . h





ipment

andWindshield— Installed

NERATORTOCHARGEBATTERIES.

witch,starttheengine,andplace thetrans-

terminalboxin thepositionmarked

edampershouldbein normalopera-

rontheauxiliarygeneratorcontrolpanel

ge.Ifthebatteriesareverylow,the

ximately50-amperescharge,andtheneedle

thebatteriesbecomecharged.

ARYGENERATOR.Pressandholdthe

box untiltheenginestops.Closethe fuel

edriver'shoodis collapsible,and

ld,windshielddefroster,andwiper.The

infrontofthe driver'sdooropening.

s usedasawindshield;withthehood

riveragainstrainor snowwhendriving

ot inuse,thehoodis stowedina

e plate.

TERSWITCH.Atoggle-typeswitchcon-

ter.Toturnon thewindshielddefroster,

onmarked"ON."Toturnoffthe de-

topositionmarked"OFF."

WITCH.Atoggle-typeswitchcontrols

permotor.Toturnonwiper,moveswitch


/ h t t p : / / w w w . h





uctions

xtinguisher

ON."Toturnoffwiper,moveswitchlever

fertoparagraph14h.

overdooropeningandattachto

20.Turn on24-voltmasterswitch.Move

verto"ON"positiontoturn offwiper.

rswitchleverto"ON"position(subpar.b

shielddefroster.Makesurecircuit

SORIES"(fig.12)doesnot"pop"out

to"ON"position.Turnoffdefrosteras

dedbymovingswitchleverto "OFF"posi-

uringhoodtohull,removedriver'shood,

ble4-poundcarbondioxidefireex-

er'scompartment(fig.22)and onein

rovidedforextinguishingfiresinthedriver's

mpartment,oroutsidethevehicle.The

xedfire extinguishersystemtoextinguish

ment.Thesystemconsistsofthe exterior


/ h t t p : / / w w w . h





ipment

partmentFireExtinguisherand

orpull handles(fig.22),remotecontrols,

idecylinders,andthetubesanddischarge

htingcompartment.

ce.Performtheservicesinparagraph

tinguishercontrols.

GUISHERTRIGGER.Atriggerinthebot-

p(fig.21)is usedtodischargetheportable


/ h t t p : / / w w w . h





uctions

S

D

nguisherControlHeads

argeextinguisher,squeezeinontrigger.

leasethetrigger.

LES.Twopullhandles,mountedina

topofthevehicle,areused todischarge

romoutsidethevehicle.To dischargethe

ght-handpull handle,breakingtheseal-

dledischargestherearcylinder.Once

ylinderiscompletelydischarged.

LES(fig.22).Twopullhandles,

ateabovetheportablefireextinguisher

tment,areusedtodischargethefixed fire

hedriver'scompartment.Todischarge

he right-handhandle,breakingtheseal-

dledischargestherearcylinder.

PERATINGLEVER(fig.23).Anoperat-

e ofeachremotecontrolheadontopof

schargethefire extinguishercylindersfrom

tment,orincasethepull handlesfail.

er,breakthesealingwire,removesafety

everall thewaydown.

GUISHER.Removeextinguisherfrom

eextinguisherasshowninfigure21 and

owardthefire.Puy inonthetrigger to

par.c(1) above)anddischargethecyl-

eatthebase oftheflame,andmovethe


/ h t t p : / / w w w . h





Conditions

detocovertheburningarea.Release

isher.Stowtheextinguisherinitsbracket.

FIREEXTINGUISHER.Whenfire

ompartment,ifpossible,closethrottleto

uel controlvalves,andclosebothengine

rs.Pulleitheroneoftheinterior pull

ve)orthe exteriorpullhandles(subpar.

eof theremotecontroloperatinglevers

asufficientlengthof timetoobserve

monecylinderbeforedischargingtheother

SUALCONDITIONS

urnishedinthissectionfor careof

neraltypesofunusual conditions.These

,dustyconditions,andimmersioninwater.

LANDLUBRICATION.

uresUponVehicle.Shockresistance

instbreakingisgreatly reducedatextreme-

esubzerotemperaturesaffectbothmetals

ofthevehicleatsubzerotemperaturespre-

ndspecialprecautions.

nyfuelssuitableforDieselengines

rcontainwaxesthatcongealattemperatures

procuredunderU.S.ArmySpecification

sion,willbeused atlowtemperatures,asit

ubzerotemperatures.Ifan emergency

tofcommercialfuel,extremecarewillbe

dpointis10° Flowerthanthelowest

eanticipated.Otherwise,thefuelwillnot

antitiessufficientforsatisfactoryengine

ING.WaterinDieselfueloilwill form

tothefuelpumps.Dueto thecondensa-

r, waterwillaccumulateintanks,drums,

ason,thefollowingprecautionsmustbe


/ h t t p : / / w w w . h





uctions

arethoroughlycleanandfreefrom

them.

anytypeofstrainerthatwill prevent

dispensingequipmentandfromaround

emovingcapto refuelvehicle.Afterfilling

y.

fpcssible.Themorefuel thereis

llbethevolumeofair fromwhichmoisture

edalcohol(grade3)tothe fueltanks

erandl/2pintat eachrefueling.Thiswill

rmationin thefuel.

ntainerstighttopreventsnow,ice,dirt,

omentering.

ormovingacontainer,allowthefuel

llingvehicletankfromit.

deof engineoilprescribedinthe

or+32° to0° F,andfollowinstructions

okeepthe engineoilfluid.

NALDRIVE.Thegradeofengineoil

order(fig.28) forusebetween+32° to

ow0° F.Whentemperaturesbelow0° F

ed,andiftransmissionand/orfinaldrive

hespecifiedgradeofengineoil, drainim-

hilelubricantisstill warm.Refilltoproper

especifiedgrade.Afterstandingovernight

warmuptransmission;firstwarmupthe

clutch,andmaintainingenginespeedfor

wgearcanbeengaged,thenput transmis-

vehicle100yards,beingcarefulnotto stall

lheatgearlubricantstopoint where

xpected.

OINTS.

erated3monthsusinggeneralpurpose

,nospecialprecautionsarenecessaryfor

krollerbearings.If generalpurposegrease

itwillbe necessarytodisassembleandwash

dry.Then lubricatewithgeneralpur-

esatisfactoryoperation.

eneralpurposegreaseNo. 0ispre-

rom+32° to0° Fshouldbelubricatedwith

0° F.


/ h t t p : / / w w w . h





Conditions

mperaturesareencounteredandgen-

s notsatisfactorywherespecifiedabove,

used.

engineoil isprescribedabove0° F,

ngoil(special).

ACHOMETERCABLES.Grease-lubricated

sfactorilyatalltemperatureswhencoated

seNo.0and thereisnoexcessgreasein the

lowtemperaturesareencounteredand

o.0is notsatisfactory,O.D.greaseNo.00

ationbelow0° F,refertotheper-

manual.

.

epingengineoilsufficientlyfluidfor

dinsteps (2),(3),and(4)below.Pref-

he differentmethodsintheorderlisted,

vailable.

eatedenclosurewhenitis notbeing

opped,draintheengineoilwhileit is

mplaceuntil thevehicleistobe operated

ot available,heattheoilbeforereinstalling.

thepointwherethebarehand canbe

Tagthevehicleina conspicuousplacein

towarnpersonnelthattheoil tankisempty.

ngineoilsmaybedilutedwith gas-

ordingtotheiravailability,withpreference

cordingtoinstructionsonlubrication

RATIONANDMAINTENANCE.

mingupVehicle.Forstarting and

hicle,followinstructionsinparagraph17d.

ongperiodsof shut-down,asin

placethatis shelteredasmuchaspossible.

ds,thevehicleshouldbeparkedin ashelt-

ifpossible.Ifnoshelter isavailable,it

atthevehicledoesnot faceintothewind.

tershuttingdownengine.

.

foroperationatsubzerotemperatures,

ofelectricalandmechanicalmaintenance


/ h t t p : / / w w w . h





uctions

ountered.Specialattentiontothesedetails

eduledmaintenancethroughouttheperiod

rushesforwearandspringsfortension,

commutatorareclean.Oilorgreaseonthe

llaffectoperationofthegenerator.

andtightenallconnections,especially

eshouldbetakenthat noshortcircuitsare

iesdecreasessharplywithdecreasing

mespracticallynilat—40° F.Whenthebat-

emperaturebelow—30F,itshouldprefer-

mptinganenginestart unlessawarmslave

atthebatteryi salwaysfullycharged,

ngbetween1.275and1.300.Afully

eezeattemperatureslikelyto beencount-

s,buta fullydischargedbatterywillfreeze

atterywhenit hasbeenexposedto

essthebatteryisto bechargedimmediately.

atteryisnot putoncharge,thelayerof

ndfreezebeforeit hasachancetomix

eltank,anddrain andcleanfilters

oreoften,toremovewateranddirt. Inan

enusingnonstandardfuels,theelementsmay

omfuelfiltersifwaxclogs theelementsand

ughthefilters.

hrcw-outmechanismandgearindry

egreaseanddirt.Heavygreaseor dirt

gmeshedorcausethem toremaininmesh

ing.Thelatter willruinthestarterand

kbrushesforwearandspringsfortension.

mutatorareclean.Oilor greaseonthe

llpreventtheelectricalcontactnecessary

rentrequiredinthestarterfor goodstarting.

N.Inspectthevehiclefrequentlydur-

forbrokenbrackets,bolts,endconnectors,

hmaybe damagedduetothedecreased

partsinextremelylowtemperatures.


/ h t t p : / / w w w . h





Conditions

INGSYSTEMS.

gsystemswithantifreezecom-

pe)foroperationsbelow+32° F.Thefol-

otheuseof thenewantifreezecompound.

totheuseof reclaimedantifreezesolutions,

gantifreezecompounditisnecessary

eanandcompletelyfreefromrust.If

ncleanedrecently,itmayonlybenecessary

ter,and drainagain.Otherwise,thesys-

cleaningcompoundaccordingtoinstruc-

ph118c.Otherunits inthecoolingsystems

nto theradiatorsandenginewaterjackets.

osesandreplaceifdamagedor de-

amps,plugs,petcocks,valves,andconnec-

ary.Repairradiatorleaksbeforeadding

rrectanyexhaustgasorairleakageinto

onshowsindicationofacoolantleakage

tenthecylinderheadstuds.Replacecyl-

sary(par.63).Inspectthermostatsand

ginopenor closedposition.Checkopera-

ngin apailofhot water.Ifthermostat

pletely,doesnotoperatefreely,or isbadly

.

stemsarecleanandtight, fillwith

hirdcapacity;thenaddantifreezecompound

theantifreezetablebelow.CAUTION:

reisbelow0° F,thoroughlymixantifreeze

orepouringintothecoolingsystems.Pro-

east10° Fbelowthelowestexpectedtem-

ngsystems,runenginestothoroughly

ginesandcheckcoolantlevels.Check

r,addingantifreezecompoundifrequired

ectlevels.Inspectcoolantweeklyfor

onsshowtracesof rust,drainandclean

ewsolutionsofthecorrectstrength.Keep

.Usecontainersthatarefreefromdirt,rust,

drometer.Testhydrometerina solution

wo partscleanwater.Thistestsolution

eterreadingof0° F.


/ h t t p : / / w w w . h





uctions

AntifreeieCompoundper

olingSystemCapacity

gunderdustyorsandyconditions,

betakentopreventexcessivewearand

tsofthe engine,powertrainandsuspen-

Filters.Underextremelydusty

oilreservoirsmustbe cleanedatleastevery

entlyasrequired;thatis, wheneverthe

chindepth.Air cleanerelementsmustbe

evealsthatanyappreciablequantityofdirt

uedoperationoftheenginewithdirtyor

causedamagetotheengine whichwillcon-

erthe aircleanershavebeencleaned.The

andthetransmissionanddifferential

dmorefrequentlywhenoperatingunderdusty

maturewearanddamagetotheengineand

xaminealllubricatingoillevelindicators

ationorpresenceofgritty substance,that

omecontaminatedandmustbechanged.

em.Lubricatetracksuspensionsys-

ansebearingsofanysand ordirtthatmay

ousings.Inspecttracksuspensionsystem

)forevidenceofprematurewear.Remove

stallnewones topreventultimatefailure.

sureairpassagesorcores inradiators

rareopenand freefromanaccumulation

coreswithwaterunderpressure,longbrush,

ON:Donotattempttodislodgedirt from

p,pointedinstrumentasthe metalforming

ctured.

beensubmergedinwater,particu-

mof arrestingrustandcorrosioncallsfor

cticalsituationpermits.


/ h t t p : / / w w w . h





emyUse

shWaterFording.Afterfording,

icalsituationpermits;andoperatehull

cleofanyaccumulatedwater.Ifthesus-

ubmergedforevenafew minutes,lubricate

ansethebearings ofwaterandgrit.

sionAfterSubmersion.Remove

e vehicleanddryallexposedpartswith

.Coatallpartsaccessible,insideandout,

ngoil.Ifpreservativecompoundsarenot

eordinaryengineoiltemporarilyuntilpre-

beobtained.Inanemergency,leavevehicle

mwetmetalparts untilpreservativecom-

thecaseof assemblieswhichhavetobe

erformtheseoperationsassoonasthe tactical

Regardlessofthetemporarysteps

agraphcabove,thevehiclemust bede-

blemomentto higherechelonsfordis-

r,andpermanentprotection.Thehigher

larattentiontopossibledamagecaused

rts oftheengineortransmissionwhichwere

satthetimeof submersion.Ifsubmerged

hoftime,aluminumormagnesiumparts

urtheruseandmustbereplaced.

ENEMYUSE

ewhensubjecttocaptureor abandon-

ill beundertakenbytheusingarmonly

e militarycommanderconcerned,such

ollowareforinformationonly.Cer-

noutlinedrequireTNTandincendiary

enormalitemsof issue.Theissueofthese

nsunderwhichdestructionwillbeeffected

eachcase,accordingtothetacticalsituation.

to, thevehiclemustbesobadlydam-

toredtoausableconditionin thecombatzone

alization.Adequatedestructionrequires

heoperationofthevehiclebedestroyedor


/ h t t p : / / w w w . h





uctions

Equallyimportant,thesameessentialparts

e vehiclessothattheenemycannotcon-

tingunitfromseveralpartiallydamaged

ONS.

nstructionsapplytothe90-mmgun

un.

ndiarygrenadesM14endto endhalf-

thtube at0-degreeselevation.Ignitethese

deequippedwitha 15-secondsafetyfuze.

tes.

enadeswillfuzewiththetubeand fill

Twomethodsofdestroyingthe

heirorder ofeffectiveness.

PLOSIVES.

rtablefireextinguishers.Discharge

em.Puncturethefueltanks.Placea

sttherightverticalfueltank,between

ea2-poundTNTchargeagainstleftside

ardaspossible.Insert tetrylnonelectric

safetyfuzein eachcharge.Ignitethe

terialsare available,additionalde-

ishedbyplacinga2-poundTNTchargeat

ackassembly.Detonatethesechargesin

hers.

beforehandandcarriedin thevehicle,

paratedfromthe chargesuntilused.

NFIRE.

eportablefireextinguishers.Discharge

ncturethefueltanks.Openalltankdoors

lable.Fireonthevehicle,usingadjacent

illery,orantitankrocketsor grenades.

sion,andarmamentinthe ordernamed.If

vehiclemaybeconsidereddestroyed.

ngvehicleby thebestmeansavail-


/ h t t p : / / w w w . h





NCEINSTRUCTIONS

tainsinformationfortheguidanceof

organizationsresponsiblefor themainte-

helon)ofthisequipment.It containsin-

anceofthescheduledlubricationandpre-

vices,aswellasdescriptionandmaintenance

temsandtheirfunctionsinrelationto other

ment.

ALTOOLSANDEQUIPMENT

LS.

andillustrations(figs.24,25,26,

forinformationonly.Theyarenotto

isition.Whenorderingspecialtools,refer

7SNLG-237.

secondechelon,special,setA,tank,

un(dry);M4A2,76-mmgun(wet);

n,M10,vehicle,tankrecovery,M32B2,

motor,90-mmgun,M36B2.

secondechelon,special,setB,tank,

un(dry);M4A2,76-mmgun(wet);

n,M10,vehicle,tankrecovery,M32B2,

motor,90-mmgun,M36B2.

r-covered

.1

d

eplacing,

on

oles

oint


/ h t t p : / / w w w . h





Instructions

eTools

eplacingTools


/ h t t p : / / w w w . h





olsandEquipment

ols(41-T-3135)

ertrain

£4-in.41-P-647

doilseal41-R-2370-200

-3829-50

,fuel

n;-

.,54-in.41-T-313S

W-1495-100

t41-W-1986-200

n.swivel

1-W-2622

nsion,

g

g,22-in.41-B-312-200


/ h t t p : / / w w w . h





Instructions


/ h t t p : / / w w w . h





olsandEquipment

O


/ h t t p : / / w w w . h





s

^-in.

oluteSuspension).

secondechelon,special,setA,supplemen-

ticalvolutespringsuspension).

secondechelon,special,setB,supplemen-

ticalvolutespringsuspension).

on,volute P u b l i c D o m a i n , G o o g l e - d i g i t i z e d

/ h t t p : / / w w w . h





acedonorisissued witheachitemof

edwithitatall times.Intheeventthe mate-

py,the usingarmshallimmediately

nconformancewithinstructionsandlists

ationorderarebinding onallechelons

shallbeno deviations.

edonthelubricationorderarefor

nsduringactiveservice.Theseintervals

emeconditionssuchasexcessivelyhighor

gedperiodsofhigh-speedoperation,con-

dust,orimmersioninwateror exposure

chmayquicklydestroythe protective

xtendcalendarintervalswhennotin use.

edinthe"Key"in accordancewiththree

ve+32° F,+32° to0° F,andbelow0° F.

ubricantsis determinedbymaintaininga

ofthematerielduringthe approachto

eciallyduringinitialaction.Sluggishstarting

sthickeningandthe signaltochangeto

extlowertemperaturerange.Ordinarilyit

egradesoflubricantsonly whenairtem-

yinthenexthigheror lowerrange.

ONINSTRUCTIONS.

s suppliedwithlubricationequipment

materiel.Thisequipmentwillbecleaned

operatedcarefullyandin sucha

perdistributionofthelubricant.

easecups,oilers,andoilholesareread-

by referencetothelubricationorder.Wipe

oundingsurfacescleanbeforelubricantis

provided,applynewlubricantuntil

om thevent.

olventofDieselfueloil willbeused

Useofgasolineforthis purposeispro-

rtswillbethoroughlydriedbeforeapplying


/ h t t p : / / w w w . h





Instructions


/ h t t p : / / w w w . h

a t h i t r u s t . o r g / a c c e s s_ u s e # p d - g o o g l e



/ h t t p : / / w w w . h





t


/ h t t p : / / w w w . h





e/nsfructions

RENTIALANDB—TRANSMISSION,DIFFERENTIALAND

INALDRIVEFILLANDLEVEL

ERANDCABLE

HAFTBUSHING

ricationViews— A


/ h t t p : / / w w w . h





INTS

ING

G

NDLEVELG-CLUTCHRELEASEBEARING

KSHAFT

ricationViews— B


/ h t t p : / / w w w . h





nstruction

VERSHAFT

ANDADAPTER

ricationViews— C


/ h t t p : / / w w w . h





ENTIALANDFINALDRIVEOILCOOLERDRAINS

ricationViews— D


/ h t t p : / / w w w . h





Instructions

RS

XANDADAPTER

ricationViews— E


/ h t t p : / / w w w . h





ricationViews— F


/ h t t p : / / w w w . h





eInstructions

IN

ricationViews— G


/ h t t p : / / w w w . h





E

ARING

NG

S

ricationViews— H


/ h t t p : / / w w w . h





Instructions

llybyOrdnancePersonnel.

INGCYLINDERASSEMBLY.Semiannual-

blockisdisassembled,disassemblethe

gcylinderassembly,cleanandcoatthe

of theclosingspringcylinderassembly

ve+32° ForNo.00below+32° F.

HAFTBEARINGS.Atinitialassembly

eshaft,cleanshaftandbearings,andcoat

bove+32° F,orNo.00for below+32° F.

EARINGS.Semiannuallydisassemble,

eneralpurposegreaseNo.2.

GEARBox.Semiannuallydisassemble,

tihO.D.greaseNo.0above+32° F,orNo.

ELECTRICMOTOR.Whendisassembled,

swithballandroller bearinggrease.

oryperformanceofmaterielwillbe

officerresponsibleformaintenanceinaccord-

ubricationmaybemaintainedinthe

Roster(W.D.,A.G.O.FormNo.460)forthe

flubricantsandrecoiloilfor thegunwill

nBook.

CESERVICES

N.

val.Preventivemaintenanceservices

5area functionofusingorganization

,andtheirperformanceistheresponsibility

horganizations.Theseservicesgenerally

on,During-operation,At-halt,After-operation,

ormedbythedriverorcrew,andthe

erformedatdesignatedintervalsbyorgan-

rsonnel.

generalinspectionofeachitem

ngmemberor connection,andisgenerally

item isingoodcondition,correctly

essivelyworn.


/ h t t p : / / w w w . h





Services

dcondition"isusuallyan external

minewhethertheunitis damagedbeyond

Theterm"goodcondition"isexplained

otbentor twisted,notchafedorburned,

bareor frayed,notdentedorcollapsed,

orated.

toseethatit is"correctlyassembled"

linspectionto seewhetheritisin normal

ehicle.

todetermineifitis "secure"isusual-

nation:awrench,hand-feel,orapry-bar

aninspectionmustincludeanybrackets,

ckingwires,orcotterpinsusedin assembly.

beunderstoodtomeanwornbeyond

oint likelytoresultin failureiftheunit

ext scheduledinspection.

NTENANCE(FIRSTECHELON).

hanicalefficiency,itisnecessarythat

allyinspectedatintervalseachdayitis

efectsmaybediscoveredandcorrected

sdamageor failure.Certainscheduled

beperformedatthesedesignatedintervals.

oryoperatingcharacteristicsbeyondthe

o correctmustbereportedattheearliest

tedindividualinauthority.Theservices

39, 40,and41are thoseperformedbythe

ration,During-operation,At-halt,After-

8.Driver preventivemaintenance

ackof "Driver'sTripTicketandPreven-

Record,"W.D.,FormNo.48,to cover

odels.Itemspeculiarto thisvehiclebut

o.48, arecoveredinmanualprocedures

theyare related.Certainitemslistedon

intothisvehicleare eliminatedfromthe

themanual.Everyorganizationmust

verandcrewinperformingthemainte-

hinthismanual,whethertheyare listed

48ornot.Theitems listedonW.D.,

thisvehicleareexpandedinthis manual

uresforaccomplishmentoftheinspections

sarearrangedtofacilitateinspectionand

ver,and arenotnecessarilyinthesame

onW.D.,FormNo.48.The itemnumbers,

hthoseshownonthatform.


/ h t t p : / / w w w . h





eInstructions

ERVICE.

nscheduleisdesignedprimarilyas

hiclehasnotbeendamaged,tamperedwith,

ter-operationService"wasperformed.Va-

ayhaverenderedthevehicleunsafefor

tyofthedriveror crewtodeterminewhether

o carryoutanymissiontowhichit is

illnotbeentirely omitted,eveninextreme

erationServiceconsistsofinspecting

ngtotheproceduredescribed,andcorrect-

ncies.Uponcompletionoftheservice,

mptlyto thedesignatedindividualin

DDAMAGE.Examineentirevehicle,

uipmentforinjurycausedbytampering,

debris,orshellfire,sinceparking.Look

ntforevidenceoftheseconditionsandfor

ccessories,loosefuel,oil,orcoolanttubes

controllinkage.

SHERS.Examinevisiblefixedex-

sin enginecompartmentforsecurity,

ngofnozzles.Checkportableandfixedex-

odcondition,security,andfullcharge

sare notclogged.

WATER.Checksupplyoffuel,oil,

cessarytobring toproperlevels.Include

ine-NOTE:Investigate,correct,orre-

evelssinceAfter-operationService.During

tifreezesolutionisinuse,if anappreciable

,haveantifreezevaluecheckedandadded

olingsystemagainstfreezing.

ANDDRIVES.Openenginecompart-

accessibleaccessories,suchasaircleaners,

ers,forloosenessordamage.Examinethe

ingcompartmentandgeneratorindriving

eorloosemountings,wiring,andfuelcon-

ordrivebeltsarein goodconditionand

nch,finger-pressuredeflection.Releasegun

ndgunbarrel travelinglock.Disengage

ingtestshavebeencompleted,again

ret ifgunisnot tobeused.Testboth

trolstobesurethat allmechanismsrespond

ountingsaresecure.NOTE:Recoiltests

madewhilefiring.


/ h t t p : / / w w w . h





Strvicn

AL.Lookinengine,fightinganddriv-

eneathvehicleforindicationsoffuel,oil,

nyleaksfoundtotheir source,andcorrect

UP.Atnormaltemperatures,follow

7,andin coldweather,refertoparagraph

ersmustengageand disengagewithout

padequatecrankingspeed.Runengines

nsperminute withclutchesengagedto

enginesuntilenginetemperaturereaches

m-upperiod,makethetestsandcheck

dinitem 9,step(7),following:

pressuregagesfor bothenginesmust

0secondsafterengineis started,and35

,100revolutionsperminute.Stopengine

rningsignallightcomesonabove1,000

age.Enginetemperaturesshouldin-

arm-uptonormaloperatingrange,160°

imaticconditionsandshouldnotvarymore

notdrivevehicleuntilenginetempera-

dOilPressureWarningSignal.Warn-

oilpressureisbelow11 poundsatidling

son withenginesrunningabove1,000

emperatureabove225° F,stopengines,

auseoflowoilpressureor overheating.

esfullychargedandallelectricalunits

llshowa high-chargingrateuntilcurrent

dtobatteries.Ahighchargingrate forany

sdischargedbatteriesordefectiveregulator.

lelectricalunitsturned offindicatesa

fectiveregulator.

e shouldregistertheleveloffuel

withselectorswitchinthe relativeposition.

beenfilledandgageshould read"FULL."

chesengaged,tachometersmust

nrevolutionsperminutewithoutvarying

perminute,andrecordtotal accumulated

sdisengaged,throttlesmustbesynchronized

notvarymorethan 200revolutionsper

d1,800revolutionsperminute,andboth

00to 450revolutionsperminute.


/ h t t p : / / w w w . h





Instructions

stradioandantennafor properopera-

rrectlyinstalledandsecure.

thornfordamage.If tacticalsitua-

properoperationandtone.

neallvisiondevicesto seeifthey

n,andsecure.

TS).Examinealllightsto seeifthey

n,andsecure.Iftacticalsituationpermits,

itchesandseeiflampsrespondproperly.

FLANGENUTSORSCREWS.Inspect

er,bogieandsupport wheelassembliesor

rewstoseeif theyareallpresentand secure.

RACKS.Inspecttracksfordamage,

orsabotagesincetheAfter-operationService.

DSUSPENSIONS.Inspectvolutesprings,

pportrollers,trackskids,andgudgeonsfor

RAKELINKAGE.Inspectsteeringlevers,

nections,brackets,andmountingstoseeif

and secure.Testleverlockingdevicesto

appliedposition.

spectfendersforloosenessordamage.

NNECTIONS.Seethattowloopsarein

esecure.Examinepintlehookfor good

ationoflatchandlock.

,ANDPAULIN.Examinethehullgen-

amagethat wouldrenderthevehicleunsafe

issiontowhichit mightbeassigned.The

t,whennotinuse,should beproperlyfolded

NATOR.Examinedecontaminatorfor

edvalve.Removefillerplugandseethat

EQUIPMENT.Besureallon-vehicle

msof standardorspecialequipmentare

,andproperlystowedormounted(par.6

he radiocommunicationequipmentand

looseordamaged.

RATION.Beforemovingvehicle,be

dnormaloperatingtemperature,thatoil

ndthatwarningsignallight oninstrument

ddecelerateenginesafewtimesto besure


/ h t t p : / / w w w . h





Services

s,andnote anyunusualnoiseorvibration

ke.Seethatenginecompartmentdoorsare

TION:Topreventdamagetoequipment

redrivingvehiclemakesure turretlockis

everisinmanualposition,and thatgunis

lockandgunbarrel travelinglockifgun

RMIT,VEHICLEPUBLICATIONSAND

thavehisoperator'spermitonhis person.

manuals,lubricationorders,FormNo.26

ormNo.478(MWOandMajor Unit

cord)mustbepresent,legible,andproperly

ERVICE.

hicleisinmotion,listenfor anysounds

ueals,orhumsthatmayindicatetrouble.

bleincoolingsystemand smokefrom

alert forodorsindicatingoverheated

asgenerator,brakes,orclutch),leaksin

tem,orothertrouble.When brakesare

vehicleturned,considerthis atestandnote

sualperformance.Watchtheinstruments

aviorwhichindicatespossibletroublein

ly.

perationServicesconsistofobserving

ngtotheproceduresfollowingeachitem,

cationsofserioustrouble.Noteminorde-

orreportedatearliestopportunity,usually

AKES.Whenvehicleisputin motion,

ppreciablespeed,teststeeringbrakestosee

edeffectively,thatleversmeetresistance

yappliedwhenleversare slightlyaheadof

hereisa reserveoflevertravelavailable.

entlytoseeifvehiclesteerssatisfactorily.

Thereshouldbe2-inchesminimumfree

remeetingresistance,andclutchesshould

n engagement,orslipwhenfullyengaged,

chlock-outtobesure itwillfunction

occurs.Observeifclutchengagementis

r.129k).

N.Makesurethegearshiftlevercan

geseasily,doesnotslipout ofmeshduring

nsmissionoperateswithoutunusualnoise.


/ h t t p : / / w w w . h





Instructions

CONTROLS.Duringoperationofthe

tinuallyforany unsatisfactoryoperating

kofusualpoweroracceleration,misfiring,

on,orexhaustsmoke.Observeifengines

ols,andifcontrolsare excessivelylooseor

mitmaximumfull-loadenginespeedto

ute.Ifradionoisewas observedwithvehicle

cooperatewiththe radiooperatorin

ccordingtoinstructionsinparagraph52.

TS.Observethereadingsofall pertinent

ringoperationtoseewhethertheyareindi-

nitstowhichthey apply,andthatspeed-

peedandodometerrecordsaccumulating

R.Listenforanyunusual noisefrom

.

ANDTARPAULIN.Whilevehicleisin

ualnoisesfromhull andloadthatmight

agetohullor attachmentsorshiftingofload.

TINGS,ELEVATINGANDTRAVERSING

hicleisinmotion,butbeforeit isusedin

embersofthecrewshouldcheckbothmanual

singandgunelevatingandfiring controls,

ismrespondsproperly.

vicesmayberegardedasminimum

ndshouldbe performedunderalltactical

oreextensivemaintenanceservicesmustbe

her.

vicesconsistofinvestigatinganyde-

eration,inspectingitemslistedbelowaccord-

wingtheitems,and correctinganydeficien-

otcorrectedshouldbereportedpromptly

alinauthority.

DWATER.Makesurethatthereis

lanttooperatevehicletonext scheduled

ndtacticalsituationpermit.If operating

eezeofproperstrengthshouldbe added

ES;HUBS,TRANSMISSIONANDDIFFER-

ANDFINALDRIVES.Cautiouslyfeeleach

portrollerhub forexcessiveheat.Examine

overheating,andexcessivelubricantleaks


/ h t t p : / / w w w . h





Services

HAFT.Investigateorreportanyun-

edin propellershaftoruniversaljoints

SUSPENSIONS.Inspectvolutesprings,

pportroller,trackskids,andgudgeonsfor

moveanyobjectslodgedinsuspensionunits

tsandtracks.Investigateorreportany un-

ticedduringoperation.

AKELINKAGE.Inspectsteeringlevers,

nections,bracketsandmountingstoseeif

and secure.

LANGENUTSORSCREWS.Inspectall

bogieandsupportwheelassemblyormount-

eiftheyareall presentandsecure.

ACKS.Examinebogiewheeltiresfor

parationfromthewheels.Inspecttracksfor

oosewedgenuts,bottomedwedges,and

ousers(ifinuse)mustbein goodcondition

objectslodgedintracks.

RAL.Lookinengine,infightingand

ndbeneathvehicleforindicationsoffuel,

eanyleaksfoundtotheir source,and

SANDBELTS.Investigateanyunusual

erationofengineorvehicleaccessories

nspectthemforloosenessordamage.Be

arein goodconditionandhaveaV-z-inch,

n.Ifradionoiseduetooperationofthe

allaccessiblewiringharnesses,bondstraps,

yare clean,andseethatallmounting

ectionsaresecure.

RS.Ifoperatinginextremeconditions

ersshouldbeinspectedateachhaltfor ex-

obecleanedand servicedasoftenas

bricationorder(par.34).

specttheseunitsfor loosenessor

NNECTIONS.Seethattowloopsare

are secure.Examinepintlehookforgood

ationoflatchandlock.

D,ANDPAULIN.Examinethehull,inside

ouldrenderthe vehicleunsafeorunsatis-


/ h t t p : / / w w w . h





Instructtons

whichit mightbeassigned.Thepaulinand

tinuse,shouldbeproperlyfolded andstowed.

nallvisiondeviceglass andlight

orloosenessanddamage.

DWEEKLYSERVICE.

onservicingisparticularlyimportant

ver orcrewinspectsthevehicletodetect

havedeveloped,andtocorrectthosethey

heyshouldpromptlyreportresults ofthe

edindividualinauthority.Ifthis schedule

hevehicleshouldbereadyto rollagain

Before-operationService,withfewexcep-

ytoascertainwhetherthe vehicleisinthe

wasleft uponcompletionoftheAfter-opera-

erationServiceshouldneverbeentirely

acticalsituations,butmaybereducedto

vicesoutlinedfortheAt-haltService,if

ormingtheAfter-operationService,

memberand consideranyirregularities

ation,During-operation,andAt-haltSer-

nServiceconsistsofinspectingandservic-

oseitemsofthe After-operationServicethat

*) requireadditionalWeeklyServices,

reindicatedinstep (b)ofeachappli-

ATION.Beforestoppingengines,

ethemmomentarily,andobserveanyunusual

htindicateloose,damaged,excessively

icatedparts.Lookforexcessivesmoke.

tisfactoryconditionofvehicle'orauxiliary

dduringoperation.

S.Checkallpertinentinstrumentsto

properlyand continuetoregisterorindi-

eofunitstowhichtheyapply.Inspectthem

.Seethatallaccessiblecondensersand

yconnectedandmounted.Stopengines

alvesto "OFF"position.

DWATER.Fillfueltanks,including

oolantlevelandreplenishasnecessary.If

olantisrequired,havevalueofantifreeze

zesolutionasneeded.Examineengineoil

essivelydiscoloredorcontaminated.Bring

eplenishspare fuel,oil,andwatersupply


/ h t t p : / / w w w . h





crvices

HHOOD,WIPER,ANDDEFROSTER.

anddamage.Testit forproperoperation

npermits.If driver'shoodisin use,be

,clean,andsecure,thatwiperunitoperates

tssurfaceevenlyandfirmly,thatdefroster

oseordamaged,andthatdefrostersheat

allperiscopeprismglass andinspect

.CAUTION:Useonlyabrushorsoft

S).Cleanalllight lenses,andinspect

damage.Investigateandcorrectorreport

uringoperationoflamps.

ISHERS.Examineallcylinders,

tobesure theyareingoodcondition,that

ndthatunits arefullycharged.Ifvalves

aged,orextinguishersused,reportthem

ATOR.Inspectdecontaminatorfor

ounting.Ifdecontaminatorhasbeenused,

l.

ksor damageandsecurityofmount-

sandcarriers,andinspectforloose

rminalsarecorroded,remove,clean,and

e.Addcleanwatertobringlevedto %inch

ezingweather,donotaddwateruntil

eoperated.

ESANDBELTS.Inspectaccessibleacces-

pumps,governors,blowers,auxiliarygenera-

or,anddrivebeltsto seeiftheyarein good

ectedormounted,correctlyassembled,and

atordrivebeltadjustmentprovidesVi-inch,

n.

LWIRING.Inspectallaccessiblewir-

ndjunctionblocksorboxestosee ifthey

hatall mountings,supports,andconnec-

accessibleradionoisesuppressionbond

tdamaged,andthatconnectionsaresecure.

reasefromall units.

RS.Examineengineaircleanersand

rforloosenessanddamage.Checkengine


/ h t t p : / / w w w . h





eInstructions

iclehas beenoperatedunderextreme

cleanand serviceallaircleanersaccording

4).

RS.

rsfor looseness,damage,andleaks.

orwateraccordingtolubricationorder.

arygeneratorfuelfiltersedimentbowl

hlyinDieselfueloil andreplacesecurely.

ble.

TROLS.Inspecthandthrottles,accel-

inkagefordamage,excessivewear,and

orrectorreportanyunsatisfactoryoperat-

goperation.

sfordamageandlooseconnections,

gnobjectsfrombetweenlinksand tracks,

ecktracktension.Tracksagshouldbe

rethan%inch halfwaybetweencenter

wedgenuts;lookforbottomed

tors,andbrokenguidelugs.Checkfordead

NDSUSPENSIONS.

brackets,arms,levers,supportroller,

forloosenessordamage.Removeany

onunitsorbetweensuspensionunits and

rtanyunusualnoiseor conditionnoticed

pensionunitassemblyormounting

Inspectsprocketsforexcessivewear.

RAKELINKAGE.Inspectlevers,link-

oodcondition,security,adequatelubrication,

gateanyunsatisfactoryperformance

Makesureleversinreleasedpositionare

esfromfaceofsteeringbrakecover

RSHAFT(WEEKLYONLY).Examine

osee thattheyarein goodcondition,

not leaking.

transmissionbreathersforlooseness

passageisopen.


/ h t t p : / / w w w . h





Services

entialandtransmissionbreatherin

onsonlubricationorder(par.34).Remove

oughly.Replacesecurely.

undervehicle,withinengine,andin

artmentsforindicationsoffuel,oil,coolant,

ocheckauxiliarygeneratorforleaks.

eirsource,and correctorreportthem.

EVELS(WEEKLYONLY).Checkthe

ferential,finaldriveassembly,andtrans-

ortiflow.

spectfendersforloosenessordamage.

NNECTIONS.Besuretowingcableis

relyattachedorproperlystowed.Examine

ionandproperoperationof latchandlock-

owloopsarein goodconditionandsecure.

,ANDTARPAULIN.Examinethehull

ordamagethatwouldrenderthe vehicle

oranymissiontowhichit mightbeassigned.

roperlydistributedand secure.Thepaulin

otinuse,shouldbe properlyfoldedand

oorisfree.CAUTION:Donotfully

testingreleasemechanism.

pectbottom,sides,front,rear,and

ds,loosehingesor looselatches.Check

onandproperoperation.

CES.Inspecttheperiscopeheads

eyare ingoodcondition,clean,securein

ersare securelymounted.Makesure

ed,elevated,depressed,andlockedindesired

tchesoperatefreelyandare notexcessive-

rismsandheads andtheirstowageboxes

dcondition,clean,andsecure.CAUTION:

dbecleanedonlywitha softclothorbrush.

DGUNS;MOUNTINGS,ELEVATING,TRAV-

NTROLS.Releasegunfromturrettraveling

nglockand disengageturretlockuntiltests

gunsare properlymountedandthat

stmanualgunelevatingandturrettravers-

yoperateproperly.Seethatloadershatch

anismoperatesproperly.Makesuregun

nualandelectricfiringcontrolsforproper

oilintraversingmechanismreservoirs

intainreservoirstwo-thirdsfull.CAUTION:

pmentorinjuryto personnel,movetrovers-


/ h t t p : / / w w w . h





Instructions

osition,securetheguninthe turrettravel-

velingrest,andengagetheturret lock

ndassemblynutsor capscrewsthat

ecessityonadailybasis.

untingandassemblynutsand cap

catesthenecessityonaweeklybasis.

TE.

ehiclewhereinspectionindicatesthe

onthelubricationorder fordailylu-

ointsofthevehiclsindicatedon the

saryonaweeklyormileagebasis.

INEANDVEHICLE.

casingsandrefusefrom interiorof

drippingsfromdrivingcompartment,

tment.Removeexcessdirt,stones,and

spensions.Seethatenginecompartment

ons.

ofvehicle,andremovealldirt and

cal,wipeascleanas possibleandwatch

causeglare.Ifcompressedairisavail-

ginecompartment.CAUTION://

for washing,caremustbetakenthatdirt

wheelhubsoron electricalequipmentor

DEQUIPMENT.

ols,equipment,andsparepartsagainst

e sureallitemsare present,inservice-

lystowedormounted.Reportdeficiencies

dequipment.Seethattoolswith

dproperlyprotected.Besure toolsand

rstowedsecurelyinproperlocationonor

NTENANCE(SECONDECHELON).

ncyofpreventivemaintenanceser-

sideredaminimumrequirementfornormal

erunusualoperatingconditions,suchas

everedust,andsandyorextremelywetter-

o performcertainmaintenanceservices


/ h t t p : / / w w w . h





Services

on.Thedriverandcrewshould

sandassistthemechanicswhileperiodicsec-

aintenanceservicesareperformed.Ordi-

epresentedfora scheduledpreventive

easonablycleancondition;thatis,itshould

mudorgreasetosuchan extentthatin-

beseriouslyhampered.However,the

edorwipedthoroughlyclean,because

uchascracks,leaks,andlooseorshifted

oreevidentif thesurfacesareslightlysoiled

ormation.Ifinstructionsotherthan

eralproceduresinsubparagraph<lor the

paragraphi,whichfollow,arerequiredfor

reventivemaintenanceserviceorforcor-

eymaybesecuredfromothersectionsof

esignatedindividualinauthority.

esegeneralproceduresarebasicin-

ollowedwhenperformingtheserviceson

cificprocedures.NOTE:Thesecond

ethoroughlytrainedintheseproceduresso

utomatically.

ledsubassembliesareinstalledtocor-

stbetakentoseethat theyareclean,cor-

rlylubricatedandadjusted.

ricantretainerseals,a coatingofthe

overthesealingsurfaceof thelipofthe

aleatherseal,itshould besoakedin

30minutes.Theoilshould bewarm,if

therlipshouldbeworkedcarefullyby

eal.Thelip mustnotbescratchedor

ertoparagraph36 1>.

areindicatedbyrepeatingtheitem

hichshowtheintervalat whichtheservices

howthat thepartsorassembliesareto

yservices.Forexample,anitemnumberin

sitea"TIGHTEN"proceduremeansthat

eobjectmustbe performed.Thespecial

ssaryadjustmentsinaccordancewith

smanual,specialbulletins,or othercurrent


/ h t t p : / / w w w . h





eInstructions

hevehiclewithdry cleaningsolvent

t,dirt,andotherforeignmaterial.After

ethemin cleansolventanddrythem

eepthepartscleanuntil reassembled,

ningsolventawayfromrubber orother

ge.Cleantheprotectivegreasecoating

materialis usuallynotagoodlubricant.

Thisappliesbothto lubrication

earon thevehiclelubricationorderandto

heorder,butshouldbeperformedin connec-

operationsifpartshaveto bedisassembled

nsistsofperformingspecialopera-

batterywater,drainingandrefillingunits

eaningthe oilfilter,aircleaner,or

operationsshouldbeperformed

que(forceonthewrenchhandle)totighten

mechanicalpractice.Useatorque-indi-

ified.Donotovertighten,asthismaystrip

.Tighteningwillalwaysbeunderstoodto

tionoflockwashers,locknuts,lockwire,

ecurethe tightening.

enconditionsmakeitdifficulttoper-

enanceproceduresatonetime,theycan

ections,planningtocompletealloperations

Allavailabletime athaltsandin

zed,ifnecessary,toassurethat mainte-

pleted.Whentimeislimitedbythe tactical

alservicesinthecolumnsshouldbe given

rsofthe preventivemaintenance

identicalwiththoseoutlinedonW.D.,

chisthe"PreventiveMaintenanceService

ndTank-likeWheeledVehicles."Cer-

eetthatdonotapplyto thisvehiclearenot

sinthis manual.Ingeneral,thenumerical

orksheetis followedinthemanualpro-

ncesthereis deviationforconservationof

ffort.

eproceduresforperformingeachitem

onthlymaintenanceproceduresarede-

art.Eachpageofthe charthastwocol-

espondingtothemonthlyandthesemi-


/ h t t p : / / w w w . h





Services

pectively.Veryoftenitwillbe foundthat

esnotapplytoboth scheduledmaintenances.

hproceduretofollow,lookdownthe col-

maintenancedue,andwhereeveranitem

heoperationindicatedoppositethenumber.

precededbyanasterisk(* )requireaddi-

dmonthlyoperation.

tuationdoesnotpermita

eitems whichrequirelittle

icle.Whena roadtestispos-

es,butnot over5miles.

VICE.PerformtheBe-

outlinedinparagraph38.

ES.Duringtheroad

strumentsandgagesreadas

ssuregagesforboth en-

ndswithin30secondsafter

o50poundsat 1,500to2,100

opengineimmediatelywhen

mesonabove1,000 revolu-

e.CAUTION:Donot

atureisatleast 60° F.Under

s,hi-watertemperaturered

temperaturesabovethe

temperatureof225° F.En-

conditioncorrected,orre-

mayshowahighcharging

untilgeneratorhas restored

used instarting.Ahigh

riodmayindicatealow bat-

regulator.Withbatteries

and electricalaccessories

or zeroreadingisnormal.

switchismovedto"R"or

shouldregisterthe levelof

ppertank.Tankshouldbe

dgageshouldread"FULL."


/ h t t p : / / w w w . h





eInstructions

esengaged,thetachometers

peedswithin100revolutions

andrecordthe accumulating

sivedriveshaftorheadnoise,

WIPERS.Testhornfor

.Testoperationofdriver's

defroster.Makesurewiper

andcontactswindshieldeven-

KINGLOCK,LEVERS,

INGACTION).When

tbeforeattaininganyappre-

brakestoseeif thevehicle

y,thatleversmeetresistance

yappliedbeforeleversreach

tthereis areserveoflever

eversindependentlytosee

rily.Stopvehicleandtest

tobesureitoperatesproperly

pplied position.

GRAB,RATTLE,

-OUT).Thereshould

e travelatclutchpedalbe-

lutchesshouldnotgrab,

ment,orslip whenfullyen-

tchIcck-outtobesure it

emergencyoccurs.Observe

operlysynchronized(par.

TION,VIBRATION,

eachspeedrangeof

ethergearshiftleveroperates

reareanyunusualvibrations

ethatmightindicatedamage,

untings,orimproperlubrica-

ATION,GOVERNED

SE;SMOKEANDOIL

sfollows:


/ h t t p : / / w w w . h





Services

henginesidle smoothly

perminutewiththrottlein

sdisengaged.Accelerateen-

governorslimit maximum

o2,250revolutionspermin-

enginestostall whenshifting

eed,Power,andNoise.

celerationandpullingpower

estingin high-speedrange,

owspeedtotopspeedwith

observingtachometersand

ernorsareoperatingproperly

but notexceed,thefullload

nespeedof2,100revolutions

speedlisted ontheserial

yunusualnoiseor vibration

rdamagedengineparts,

s,orinadequatelubrication.

ce,withoneengineat atime,

ofpowerandacceleration.

on.Beonthealertfor ex-

tsmoke.Afterroadtest,

nesareusingan excessive

LERSHAFTAND

ANDDIFFEREN-

CKS,ANDSUSPEN-

theroadtest,beon the

n theseunitsthatmightin-

e,excessivewear,orinadequate

ISSIONANDDIF-

TRANSFERUNIT,

EWHEELS,AND

mpletionofroadtest,

missionanddifferential,final

runitforevidenceof over-

feeleachidler,bogiewheel,

excessivetemperatures.


/ h t t p : / / w w w . h





eInstructions

AVERSINGMECHA-

itionwhereitis tilted

es.Beforemakingtest,re-

ntravelinglock,andgun bar-

est,againsecurethegun

seturretthroughits full

handandpowercontrols;

velash,orerraticaction.Be

roperly.Withgunpointed

hitsentirerange withhand

ding,excessivelash,orerratic

etolevelground.

,ANDWATER).After

nginecompartment,under

drivingcompartmentsfor

xamineallfuel andoillines,

nectionsforleaks.

OADTEST).With

ce,inspectforsatisfactory

ouldbenotlessthan Vi-inch

sagbetweenthe secondand

8).

NS

L).Placevehicleon

at1,000to 1,200revolutions

fwatertemperatureis180° F

emoveenginecompartment

essiblepointsofengine

rdamageorfor leakingoil

evelwithboth oillevelgage

aminesampleongagerods

roil changeisdue,drainen-

esare toberemovedasin

edorrefilloilpans asinstruct-

r.34).

nspectstrainersfor

Cleanelementsandhous-

ely,usingnewgaskets.


/ h t t p : / / w w w . h





Instructions

gesandconnectors.Tighten

l of75to90 foot-pounds.

esfromtracks.NOTE:

sconnectedandremovedfrom

ers,andidlers,orat eachthird

vice,therelateditems22and

*) onthePreventiveMainte-

t(W.D.AG.O.FormNo.

asdescribedbelowinthe as-

edures.

CCENTRICS,SERRA-

NT,NUTS,AND

emstoseethatthey arein

assembled,secure,andthat

ssivelyfromwheelbearing

ngcollarandclampscrews

emblyandmountingscrews

above,ateachthird month-

rwhereverthetracksarere-

ecktheidlerhub bearingsfor

the idlerwheelsandlisten

might indicateadamaged,

equatelylubricatedbearingas

NKS,GUDGEONS,

OLUTESPRINGSAND

ARINGPLATES).In-

msareingoodcondition,cor-

ure,andthatgudgeons,collars,

atesarenot excessivelyworn.

hvehicleundernormalload

e iftheyhavetakenaper-

volutespringswhichhave

estingon thespringssat.

blyandmountingnutsor

ANDSKIDS).In-

condition,correctassembly,

particularattentiontosee

separatedfromwheelsand

,orexcessivelyworn.


/ h t t p : / / w w w . h





Services

spectsupportrollers.Lift

)) toexaminewheelbear-

play.Spin wheelsandrollers,

oise. Tightenassemblyand

H,ANDNUTS).In-

ttheyare ingoodcondition,

thatattachingscrewsarese-

thforexcessivewear,and

cessiveleaks.Ifsprocket

n,sprocketsshouldbereplaced

d).Tightenassemblyand

NOTE:Wheneverthetracks

perationshouldbsperformed

led.

bove,at eachthirdmonth-

thetrackisdisconnectedand

et,checkthedrivesprocket

ssandendplay.Checkth?

vewear,andseethatsprockets

at hubnutsaresecure.After

nstallthetracksandconnect

tracksforpropertension,

urface.Thereshouldnot be

an l/2-inchsagbetweensec-

s.Adjust tracktothisstand-

156b).

K,PAINTAND

ORS,COVERSAND

AMAST).Inspectall

ey areingoodconditionand

perateproperlyand latch

refreeand thatoperating

velyworn.Seethatgrillesare

ctpaintforrust orpolished

glareorreflections.Unless

ns,allvehiclemarkingsshould


/ h t t p : / / w w w . h





Instructions

rcleanersforevidenceof

eanddisassemblecleaners.

s,bodies,andelementsin

bodiestolevelmarkas in-

er(par.34).Assembleclean-

akingsureall sealedjointsare

NREQUIRED).Re-

maintenanceserviceonlyifin-

9,13, and14anda checkof

adefiniteneed.

ginesanddrythoroughly.

oved,performcleaning

sible.CAUTION:Keep

omelectricalwiringorequip-

ASKETS.Inspectheads

eeifthey areingoodcondi-

nsofoil, coolant,andcom-

kets,joints,studs,andconnec-

headnutsshouldnotbe

videnceofloosenessor leaks.

usea torquewrenchand

shot,or160 foot-poundscold.

tfuelpumpgage,run

lutionsperminute,andtest

1c).I fpressureisless than

mp,makingsureallconnec-

king.

oveinjectors,oneata

iongage(par.62a).Test

derandrecordreadingsin

esideofForm462.I fread-

dersineitherenginevary

fyhigherauthority.Inspect

ompressiongageisremoved,

atingproperly.Donotinstall

S.Withrockerarm

reatherpad(fig.98);andifit

,andinstallpad(par.95 b).


/ h t t p : / / w w w . h





Services

ose,andtube(fig.97)to make

dition,secure,andnotclogged.

running,inspectairboxdrains

renotclogged.Donot install

CTORS,LINES,AND

enginefueltubes,hoses,

elmanifoldstobesuretheyare

dnotleaking.Test action

e sureitis notwornorbind-

ctorclampnut,usingnot

pull.

vebeenremoved,orwhen

eneed,adjustrackcontrol

etheinjectors(par.74c).

77e).

RANCES,LUBRICA-

nspectexhaustvalve

dspringstoseethattheyare in

assembled,securelymounted,

brication.Examinerocker

sureit isserviceable.After

armcover.

anceonlyifimproperen-

estheneed,orifvalveoper-

nloosenedorremoved.

ndwarmedupto atleast

neachvalve.Stopengineand

e0.01 1-inch"Go"and0.013-

ar.61bandc).

andexhaustmanifolds

eethattheyarein goodcon-

andthatallgasketsandcon-

ingnutsandcapscrews

DSHROUDS.Examine

blockwaterholecoversto

mountedandare notleaking.


/ h t t p : / / w w w . h





eInstructions

omakesure theyareingood

bled,secure,andthatfansare

ds.Testfansforl oosebear-

FLERS.Inspectthese

oodcondition,correctlyas-

edandconnected,andifthere

s,usuallyindicatedbycarbon


GMOTORS.Inspect

tionandsecurityof mount-

ectionsaresecure.Seethat

uppressionshielding,conden-

esecurelyconnected.

randstartingmotorcover

mutatorsforgoodcondition.

nbrushholders,clean,andnot

shconnectionsaresecure,and

r chafing.Cleancommutator

erby blowingoutwithcom-

gmotorandgenerator

spectallaccessible

ttings,andvalvestomakesure

secure,andnot leaking.Test

lves.

siblefueltanks,tube,or

ngclips,ormountingstraps

emoved,cleanfueltank

contaminatedwithdirtor

ks.

ginefuelniterstoseethat

securelymounted,andnot

.68 e(1 ))of allsedi-


/ h t t p : / / w w w . h





Services

ontaminatedorreplace-

lementsaftercleaningshells.

ULKHEADAND

ktoseethatenginecom-

ead,isingoodconditionand

ageinenginecompartment

curelyconnectedand

partmentthoroughly.Re-

pe outtheenginecompart-

Dieselfuel oil,anddrythor-

sareremoved,repaintif

minevisibleportionsof

ey areingoodcondition.Be

resecure,andlookforevidence

are removed,removeclutch

anall clutchpartsandin-

wearordamage.Ifpilot or

disksare wornordamaged,

therdeficienciesmustbe

gherechelon.

erveallaccessiblemount-

toseethattheyare ingood

ingboltsandbondstraps

reremoved,tightenallmount-

heengines.

EM(TANKS,

ANDMOUNTINGS).

s,andcylindersoffixedfire

dition,securemounting,and

ybepositivelydetermined

).Examinecontrolcablesof

attheyare ingoodcondition

sconnected,testtoseeifthey

oment'snotice.Seethatall

oodcondition,securelymount-

zzlesproperlyaimedandnot


/ h t t p : / / w w w . h





Instructions

blyandmountingboltsse-

enginetransferunithous-

dcondition,notleakingatseals

emblynutsorscrewsarese-

e,drainandrefill toproper

r(par.34).

OUNTINGS,LINES

ONTROLLINKAGE,

runitwasremovedfor

tallatthistime (par.57).

ndstrapssecurely,andcon-

ndcontrollinkagecorrectly.

refilledtoproperlevel.See

onnectedandcoolantlines

ANSIONTANKS,

FREEZERECORD).

itemstoseeifthey areingood

mbled,securelymountedorcon-

stthermostathousingdrain

erateproperlyandarenotbind-

eanallobstructionsfrom

andstraightenbadlybent

ntisat properlevelandex-

.NOTE://cleaningof

ry,proceedonlyaccordingto

agraph118whichcovers

r,andinhibitor.Duringfreez-

ntifreezeandrecordin space

No.462.Addantifreezeas

ngsystemagainstfreezing.

ON(CORELINES).

es,hoses,andconnectionsto

dition,securelyconnectedor

Cleanoutalldirt andtrash

ngcompressedairif available,

entcoolingfins.


/ h t t p : / / w w w . h





Services

YS(GENERATOR).

ebeltsandpulleysto seeif

Seethat pulleysareproper-

djustdrive beltstoprovide

eflection.

D-DOWNS,CAR-

NDVOLTAGE).Clean

tthemfor damage,leaks,

sts,straps,andhold-downs.

oltage,andrecordonspace

No.462.See hydrometer

b(3)) andcapacityand

5)).

box,andrepaintboxif

erminals,bolts,andposts,and

minalsandhold-downsin

magetobattery.

bringelectrolyte3/8inch

HANDTHROT-

rpedal,throttleleverand

,crossshaft,connections,re-

esandbrackets,toseeif they

ectlyassembled,securely

ndnotexcessivelywornor

ssemblyormountingnuts

magedormissingcotterpins.

atingcharacteristicswere

em 9),makenecessaryad-

ragraph78g.

ENTS.Startengines,

autionsoutlinedinparagraph

tersengageanddisengage

oise,andhaveadequate

pertinentinstrumentstosee

heproperfunctionoftheunits

ndthrottleto idleengines

nsperminuteduringwarm-up.

notevidentin l/iminute,

te.


/ h t t p : / / w w w . h





Instructions

,ANDCOOLANT).

oil,fuel,and coolingsystem

checkallcomponentsforleaks.

eirsource,correctthem,or

ority.Installengine com-

rely,usingnewgasketsifre-

ECTIONS,BOND

spectmainandaux-

toseeif theyareingoodcon-

ectedandmounted.Seethat

onbondstrapsandcapacitors

securelyconnectedand

shavereachednormal

60° to190° F),theyshould

0revolutionsperminutewith

essary,makeadjustments

gtoparagraph77e(2).

ATION.Testthrottles

enecessaryadjustmentsto

enginesinaccordancewith

78gand 79.Besureall

velyworn,andsecurelycon-

(PAINT,SEATS,

ADS,STOWAGE,AM-

ANDRACKS).Inspect

eingoodcondition,andsecure-

d.Seethatfightingcompart-

insatisfactorycondition,and

smsoftheseatsoperateproper-

cated.Payparticularatten-

sandshellpads arepresent

mmunitionboxesandracks,

nttensiontohold shellsse-

COPICSIGHTS.Examine

wsandtelescopicsightstosee

dition,clean,andsecurelyat-

urethat periscopesarese-

.Rotateandtiltholder to


/ h t t p : / / w w w . h





Services

kesurelockingscrewshold

edposition.Examinespare

theirstowageboxestosee

dition,clean,andsecure.

becleanedonlywithasoft

AVEL,LINKAGE,

OUTS).Pedalfreetravel

must neverbelessthan1 inch.

rossshafts,connections,and

ingoodconditionandsecure.

xcessivewear.Seeifreturn

tofully returnpedaltore-

outstobesurethey function

saryadjustmentsaccording

TRAVEL,PARKING

AGE).Freetravelat

o51/2inches.Brakesshould

ersreacha verticalposition.

geto seeiftheyarein good

nnected,andthatconnections

elyworn.Testleverlocking

atesproperlyto holdlevers


djustmentstosteering

oparagraph143h.

AHER.Examineac-

entialcasein driver'scompart-

odcondition,thatall mount-

cap screwsaresecure,and

breatherto seethatitis in

ndnotclogged.

vebreatherandcleanthor-

alassemblyandmounting

.Inspecttoseethat

eroperatesproperly,isingood

mbled,securelyconnected,and


/ h t t p : / / w w w . h





e/nstructions

TS,ALINEMENT,

ropellershafttoseethat

titiscorrectlyassembledand

atuniversaljointsareproperly

yworn.

jointassemblyandcom-

ly.

TCHES(HEAD,

ERNAL).Testtosee

ghts)operateproperly.In-

areingoodcondition,secure,

ses.

eams.

ERMINALBLOCKS

EAKERS,ANDBUT-

eabove-listedunitsto see

dition,securelymountedand

sureallaccessibleradionoise

psareingoodcondition,and

terminalorcontrolboxin

t clipsaretight.

ES,HEADS,CYL-

h24-voltand12-volt

ecollectorringbox(slipring)

thatabovelisteditems arein

Seethatbrushescontact

malspringtension.Seethat

tedandnotchafing.Besure

andthatbondingstrapis in

elyconnected.

ESSORS,FILTERS,

DING).Seethatall ac-

ntheforegoingspecificpro-

on,securelymounted,and

itionalnoisesuppression

xternaltoothedwasherslisted

ctedforloosenesor damage,

cesareclean.NOTE://ob-

mthevehiclehasbeenre-


/ h t t p : / / w w w . h





Services

dancewithparagraph52.11

mountingsandconnections.

tiveradiosuppressionunitdoes

heradiooperatorwill report

atedindividualin authority.

NANDHOUSING,

NTINGS,ANDEX-

ethattheseitems arein

elymounted.Seethatthere

eoraroundgaskets,andthat

reely.Seethatradiosuppres-

odcondition,securelymount-

dinspectsparkplugsfor

delectrodes;gapmustbe

viceableplug,usingnew

NG,ANDSHIELD).

ems areingoodcondition,cor-

urelymounted.Makesure

drotor armareingoodcondi-

eakerpoints arecleanand

hat radionoisecapacitors

relymounted,andconnected.

stbeproperlyalinedand

nch withpointsfullyopened.

ER.Inspecttoseethat

on,securelymounted,andnot

eaninDieselfueloil, and

engine oil,drain,andin-

KANDCAP).Examine

eingoodcondition,secure,and

kshut-offvalve,andclean

dscreen;reinstall,usingnew

fuelsupplyvalveandcheck


/ h t t p : / / w w w . h





Instructions

OR,BRUSHES,CON-

Removebrushhead

commutatortoseethatitis in

dnotexcessivelyworn.See

ein theirholders,properly

cessivelyworn,andthatradio

sersonbrushholdingplateare

relyconnected.Inspectcon-

mmeterandwiring toseethat

correctlyassembled,and

hlyservice,cleancom-

f 2/0flintpaper(notemery)

orrectsize;withenginerunning,

mmutatoruntilit isclean.

ssedair.

NERATOR,

Startengine,observing

runs atnormalspeed.Listen

that generatoroutputis50

itsoperating.Examinefuel

AVERSINGANDELE-

DFIRINGCON-

ttheseitemsarein good

cated,correctlyandsecurely

sivelyworn.Checktoseethat

ersingcontrolsareingood

ngparticularattentiontowir-

tions.Makesuregunisnot

gcontrol,bothmanualand

nctionproperly.Operatehand

hentirerangetoseethat they

seturretbyhandtoseethat

urretcanbe turnedthrough

e.Seewhetherthebrakeis

rolbrakelatchisreleased.In-

stem,includingmotor,pump,

atingcontrolstoseethatthey

ectlyassembled,secure,oper-

xcessivelyworn.Examine


/ h t t p : / / w w w . h





Services

andforproperlevel ofoil.

ngtoinstructionsin lubrica-

n operatingcheckoftrav-

otorswitch,placingclutch

osition,andturningpistol-grip

eft,andneutralpositions to

mrespondsproperlywithout

ntassemblyandmounting

ecoilcylinderstosee

ditionandnotleaking.NOTE:

stbemadeonlyunderfiring

ingandassemblynuts

UN(MOUNT).Inspect

eyarein goodcondition,cor-

ndsecure.Makesuretherest

velingposition.

blyandmountingboltsse-

DPARTS.Seethatall

arepresent,ingoodcondi-

NEER).Checkstand-

ertoolsagainststowagelists

msarepresent,in goodcon-

dormounted.Anytools

iclewhichhavebrightor pol-

aintedorotherwisetreated

ons.Toolswithcuttingedges

protected.

equipmentitemsagainst

8)tosee ifitemsarepresent,

ndproperlystowedor


/ h t t p : / / w w w . h





Instruction!

pecttoseeif these

oodcondition,andproperly

IL,HYDRAULIC,

ethatsupplyof listed

operlystowed.Thissupply

times.

minetoseethatdecon-

on,secure,andfully

kbyremovingfilterplug.

RTABLE).Inspectto

fullycharged,ingood condi-

d,andthatsealon valvehead

ychargedextinguisher

fications(par.231b).

NO.26.Checktosee

lubricationorder,accident

WOMajor UnitAssembly

.,A.G.O.FormNo.478),are

erlystowed.

ue,lubricateinac-

order(par.34)andcurrent

ngonlycleanlubricantand

adspeciallubricationduring

agedormissingfittings,

gs.

DERSCOMPLETED.

nethatallModificationWork

tedandenteredonW.D.,

eranyreplacementofMajor

eofthis service.

finalroadtest,recheck-

.Beforedrivingvehicle,

shiftlever inmanualposi-

ret travelinglockandgun

ecktransmissionanddiffer-

s atcorrectlevel,andthat

ethisroad testtominimum

kesatisfactoryobservations.

rateitina normalmanner.

nciesfoundduringfinalroad


/ h t t p : / / w w w . h





ntainstroubleshootinginformation

hicle.Itsusewillhelp determinethe

bleswhichmaydevelopin thevehicle.

are listedsymptomsofthemostprevalent

mmaybecausedbymorethan onecondi-

whichwill locatethetroubleoreliminate

msfromfurtherconsideration.

icationofwiresintheelectricalcir-

berswhichareattachedtoeachwire.A

ectricalwiringiscontainedin section

k.

ERSWITCH.Besure24-voltmaster

umentpanellightstomakesuremaster

beingreceivedattheinstrumentpanel.

RTERSYSTEM.Seeparagraph5la.

econdEngineWill Not.

RTERSYSTEM.Seeparagraph51a.

INGGEARANDSTARTERDRIVE.First

snot electrical.Ifstarterturnsnoisily

theflywheelring gearisprobablystripped

eplaced.Lockoutengine.Removestarter

tarter drive.Turnflywheelwithbarand,

xamineflywheelringgear.Ifgearis

nteeth,notify higherauthority.

ATICLOCKORMECHANICALSEIZURE.

ve,or flywheelringgeararenotat fault

ked,enginemaybeseizedor locked

eafluidblock(hydrostaticlock).Ahydro-

teror Dieselfueloilleakinginto acylinder

sion)in sufficientquantitytoblockthe

istons oncompressionstroke.Todeter-

ostaticlock,removeallsixinjectors.Place

o eachinjectorcanbereinstalledinits

nsmissioninneutralandstationper-

openingsincylinderhead.Wedgea bar

andturnengineindirectionof rotation.

veif waterorDieselfueloil isejected


/ h t t p : / / w w w . h





eInstrucfions

penings.If waterisejectedfroma

etoa leakycylinderheadgasket,leakyin-

ackedcylinderhead.Removecylinderhead

eselfuelis ejectedfromacylinder,

withanewone, installremaininginjectors,

tisnot likelythataleakyinjectorwould

heengine hasnotbeenoperatedfora

nkselectorvalvehasnotbeenclosed.

,cleanoilstrainer,and refilllubricating

gengine,aswateror Dieselfueloilmay

case.Ifenginecannotbeturned,it is

cally.

o Start(TemperatureAbove

ECTORVALVE.Checkfueltank

ontrollever indicatesright-orleft-hand

heckbothfueltanksbymeansof

andmanuallywithdip sticktoseethat

setsof fueltanks.

SPEED.Enginecrankingspeedcanbe

gineorby watchingfan.Ifcranking

ill notdevelopsufficientcompressionto

owcrankingspeedmaybeduetoa

par.51a).Anothercauseoflowcranking

casecontainsa heaviergradeoflubricating

prevailingtemperature.Removeasample

neandcomparewithrecommendedgrade.

ecommendedgrade,drainenginelubricat-

hcorrectgradeoflubricatingoil.

RFUELSUPPLY.Seeparagraph46.

UTLETFORBLOCKEDPASSAGE.In-

cessary.

ORWATER.Seeparagraph46.

TIVEBLOWER.Ifblowerdoesnotturn,

gineisoperatingandblowerstops,engine

oweris operatingcorrectly,removethe

woairintakeopenings.Crankdead

e.Placeasmall,light boardorpieceof

ningto determineifthereissuction.If

efelt, blowerisnotoperatingcorrectly

fyhigherauthority.


/ h t t p : / / w w w . h





o Start(TemperatureBelow

ELECTORVALVE.Seesubparagraph

eesubparagraphc(2)above.

SPEED.Seesubparagraphc(3)above.

RFUELSUPPLY.Seeparagraph46.

UTLET.Inspectoutletandcleanif

FUELSYSTEM.Seeparagraph46.

TIVEBLOWERSeesubparagraphc(7)

AIRHEATER.Repeatcrankingopera-

instructedonplateorinstrumentpanel.

ERATION.Readthisentirepara-

withdiagnosisoftrouble.Inextremely

pectionsandtestsbeforeagaincranking

ycharge.Makesurefueltankselector

heaterfuelshut-offvalveisopen.Operate

andleoperateswith normaleffortwhich

hergetscolder,thefuelsystemis notat

system(par.Sle).Ifair heaterpump

cticallynoeffort,itindicatesaleakygasket,

defectivepump.Replacepumpifdefec-

andlecannotbepushedinafter being

esare cloggedandmustbecleaned.

ectingbothpumpoutlets,openingfuel

ngbothpumps.

Misses,orVibrates.

ETooLow.Ifenginetemperature

rununevenly,detonate,andhaveasmoky

nuesordevelopsduringoperation,ther-

andmustbe replaced(par.124bandd).

ELFUELOILINTANKS.Securesam-

omparewithcorrectgrade.Ifincorrect

nksandrefillwithcorrectgrade.Incorrect

ggedcylinderliner partsandsmoky

SUPPLYOFFUELTOINJECTORS.See

TERINFUELSYSTEM.Seepara-


/ h t t p : / / w w w . h





Instruction*

ATION.Faultyinjectors,incorrectly

erlyadjustedrackcontrolleverswillcause

y,miss,andvibrate.Testfuelinjectors

ecessary(par.74«land f).Iftheinjec-

hetrouble,checkinjectortiming(par.74c).

ollevers(par.74g (1)).Drainthewater

rtmentbyraisingthesplashguard.

NTAKESYSTEM.Oilin theair

byexcessiveexhaustsmoke,willcause

ation.Suchaconditioncancauseover-

keitimpossibleto stoptheenginewith

ombustionchambersthroughtheair

evelinair cleanersistoohigh,causing

oxdrainscauseanaccumulationoflubri-

oil intheairbox;leakyblowerrotor

housingto cylinderblockgasketpermit

erthevehiclehasbeen washedorex-

erwill accumulateontheenginesplash

nintoair cleanerswhichwillraisethe

dincomingairwillforceoilinto engine,

lashguardanddrainaccumulatedwater.

eanersisnotabovecorrectlevelmark.

outairboxdrains ifnecessary(pars.84l>

andoilcontinuestoleakinto airbox,

NDOPERATIONOFGOVERNOR.Incor-

perationofthegovernorwill causeengine

tall,oroverspeed.Suchconditionor

itimpossibletostop enginewiththe

ustedgovernorcanalsocauselossof

s indicated,notifyhigherauthority.

ESSIONTEST.Lowenginecompres-

sfire,run unevenly,vibrate;asmoky

.Reasonsforlowcompressionare:Incor-

ckingorleakingvalves,brokenvalvespring,

t,scoredpistonorliner,or wornengine.

ts(par.61),andexamineforbroken

valves.Notifyhigherauthorityifa broken

mup engine,andrunitslowand then

estems.Ifupwardstrokeof valvestem

rarm,aspacewillappearbetweenstem

eartobe sticking,whichcanbecaused

corrodedstem,oraweakspring, notify

rleakyvalveseats,leakycylinderhead

ners,makeacompressiontest(par.62).


/ h t t p : / / w w w . h





ycylinder,removecylinderheadforin-

ged,replaceitwitha newone(par.63).

andthereforeisnotthecauseof lowcom-

iners arescored,lowcompressionis

tsorwornengine.Notifyhigher authority.

DAMPER.Enginevibrationorunusual

edbythe vibrationdamperbeinglooseon

perbeingdefective.Visuallyinspect

terweight sectionsisloose,notifyhigher

onotrunengine.Ifdamperappearsto

rning damperoncrankshaftbyhand.

edevenafractionofan inch,itisloose

igherauthorityimmediately.Donot

OFINJECTORCONTROLMECHANISM.

echanismcanbethecauseoffrequent

abilitytostopenginewiththrottle,and/or

rbinding: Removerockerarmcover.

osition.Rotateinjectorcontroltube

sitionandrelease.Ifcontroltube does

EL"position,thebinding maybein

k,thecontroltube,or theinjectorracks.

nkatcontroltubeleverto determineifa

bindingstill exists,firstseeifany

gainstinjectorracksandcorrect.If

ebetweenleversandinjectorracks,remove

d seeifanyof theinjectorracksbind.

74 d).Ifinjectorracksworkfreely,

orcontroltubebrackets.Wipemounting

derheadclean.Installtubeandbrackets.

easbracketsarebeingtightenedto make

ly.

.

ETooLow.Seesubparagraphe(1)

OINJECTORS.Seeparagraph46.

TERINFUELSYSTEM.Seepara-

NJECTORCONTROLMECHANISM.See

e.

ncorrectadjustmentorfaultyopera-

usethe enginetorununevenly,vibrate,

so makeitimpossibletostopthe engine


/ h t t p : / / w w w . h





Instructions

ectlyadjustedgovernorcanalsocause

speedof governor(par.77e).

ETooLow.Seeparagraphe(1)

EDAIRINTAKE.Restrictedairsupply

andalsolossof power.Removeand

ersandelements(pars.81b (2)andc).

uble,removeairintakehousingand

TAINCORRECTGRADEOFDIESELFUEL

2)above..

ANDOPERATION.Incorrectlyposi-

rrectlytimedinjectors,orfaultyinjectors

ust,detonation,andlossofpower.Make

ectlypositioned(par.74g).Checkinjector

ctors(par. 74b).

ENTERINGINTAKE.Seesubpara-

RESSION.Seesubparagraphe(8)

fertosubparagraphe(6),(7),and

NT.Lossofwatermaybedue toa

sinthe coolingsystem.Inspectpressure

f valveisclearandoperatingproperly.

asketandgasketunderstrainerflange.

connectionsforleaksandtightenconnec-

ninternalleakis suspected,securesam-

xamineforpresenceofwater.Ifwater

head(par.63a) forfurtherexamination.

oundincylinderhead,removeand

(par.98b).

CIRCULATIONIsSUFFICIENT.Over-

irculationcanbecausedbydefectivether-

cloggedradiators,tubes,orhoses.First,

ats(par.124b).Second,cleanandflush

andinspectalltubesandhoses.Third,

pump(par.121b).

OFAIR.Restrictedflowofair through

eoverheatingofoneor bothengines.

passagesinradiators,bent exhaustdeflec-


/ h t t p : / / w w w . h





noperativeorincorrectlyassembledfan

nradiatorcores.Straightenexhaust

fanstoseeif theyareinstalledcorrectly.

perationoffans.If eitherfandoesnot

y.Directionoffanrotationis marked

oversandon radiatorsidesofffans.

ATUREGAGE.Anincorrectlyoperat-

gewillgivea falsereadingofthetempera-

Withenginesoperating,compareread-

ages.Differenceinreadingsmastnot

suspectedofbeingfaulty,removethe

6b),disconnecttheoldgage,and tem-

.Operateenginesandcomparegage

freadingsare within20° F,installtem-

anelandinstall instrumentpanel(par.

edWithThrottle.

RDISCONNECTEDFUELCONTROLLINK-

ydisconnectedorbrokenlinks,and

KAGEADJUSTMENT.Failureofthe

eis movedinto"NOFUEL"positionmay

linkageadjustment.Firstmakesure gov-

ctlypositioned,paralleltoends ofhousing

gnotch.Observetravelofcamleverwhen

FUEL"position.Ifcamlever doesnot

rottlelinkagemustbe adjustedaccording

78.If thisdoesnotcorrectthethrottle,

ordancewithprocedureinparagraph77e.

NTAKESYSTEM.Seesubparagraph

ONTROLMECHANISMOPERATESFREE-

0)above.

ATION.Seesubparagraphe(5)above.

DJUSTMENTANDOPERATION.Seesub-

ndRaces.

ILLEVEL.Anexcessiveamountofoil

etheenginetoidle unevenlyandtorace.

conditionandcorrectif necessary.

illevelin anaircleaneris foundto

drunawayidlingpersistsaftergovernor

ked(subpar.e(7)above),reducetheair


/ h t t p : / / w w w . h





Instructions

ch.Installcleanerandagaincheckengine

T.Iftheprocedureoutlinedinstep

nidling andracing,thisindicatesthatthe

moreofthecleanersispositionedtoo low

ouldberaised.Refertoparagraph81 h(3).

GSYSTEM.

sure.

i sthecauseoflowoil pressure,

neifthelowlevelis causedbyoilleaks.

nalsystemtubesandconnections,with

pectstrainer,oilcooler,andoilpan. In-

sketforoilleaks.Examineoil pressure

oil leaks.Examinewaterinauxiliary

ubricatingoil.If oilisfound,removeoil

egasket,andtestcoolerfor leaks.Replace

BRICATINGOILSYSTEM.Evidence

lsystemcanusuallybedeterminedby

oilfiller tube.TheodoroftheDiesel

able.Comparesampleoflubricatingoil

wengineoil.Examinethesamplefor

Dieselfueloil. Thinnedoilmaybecaused

eenpouredintotheengineoil filterby

es,orbyleakyconnectionsinthe rocker

fueloilcanalsoenterthe crankcase

he fuelselectorvalveisnotclosedwhen

edfor alongperiod.Ifa leakyinjector

or(par.74d). Removerockerarmcover

nrockerarmcompartmentforleakswith

minetopsofcompressionnutsoninjector

recleanandnot coveredwithadarkened

ndicatesconnectionsareleakingandmust

avebeencorrected,drainandrefillengine

L.Comparesampleofengineoilwith

differenceisfoundtoexist,drain andrefill

withcorrectseasonalgradeengineoil.

CORRECT.Todetermineifanoil

orrectly,operatebothenginesandnoteread-

bothgagesshouldbe withinafewpounds

showsamarkedlowpressure,remove

6b).Disconnectgagewithlowreadingand


/ h t t p : / / w w w . h





wgage.Operateenginesandagainobserve

dingsare withinafewpoundsofeach

tallnewoilpressuregage(par.101 c)and

ar.186c).If temporarygagestillshows

he troubleisinthe sendingunitwhich

«l ande).

ANDSTRAINER.Lowoilpressurecan

edoilcoolerorstrainer,butthis condition

eenproperlyserviced.Ifoil pressureis

auseshavebeeninvestigated,removeand

b), andoilcooler(par.98b).

EOILPUMPORVALVES.Further

r nopressurecanbedueto afaultyoil

aultyoilpumpreliefvalve,leakygasketsor

be,or adefectiveoilpump.Ifinspection

pressuretoanyoneofthese units,notify

LEARANCE.Wornbearingswithexces-

causelowoilpressure.If thisconditionis

uthority.Wornbearingswillnotbeindi-

enoise.

.

VALVECLOSED.Turnvalveto"LH"

heckleveloffuelinbothfuel tanks.

UELSYSTEM.Toinspectfuelsupply

s,firstfillbothsets offueltanks.Thenturn

icatorto"RH"setof tanks.Putpressure

r5 minutesorlonger,usingareducedcom-

eeding10pounds.Whilesystemis under

tubes,connections,andfueltanksforleaks.

onnectionstostopleaks.Repeatpro-

ATION.Adefectivefuelgageorsend-

nemptyfueltank.Ifeither orboththese

gdefective,firstdetermineifthere isfuel

ringbyhand.Removeanoillevelindi-

ndwipeindicatorclean.Measurefuelwith

leanbeforereinstallinginengine.If

k,checkfordefectivegageorsendingunit


/ h t t p : / / w w w . h





Instructions

FUELFILTERSORTUBES.Turnfuel

LH"positionanddisconnectfueltubefrom

sted.Iffuelflowsfreelyfrom tube,it

ed.Turnvalveto oppositesideandcon-

tubefromenginefuelfilterand fuelpump

out withcompressedair.Blowoutall

mpressedair.Tocleanenginefuel filter,

trolto"OFF"andremovefilter (par.68f).

n fuelselectorvalveonoppositefueltanks

om whichfilteristobe removed(par.

dimentisfound,bothsetsoffuel tanks

edout.

ESENCEOFWATER.Drainone-quar-

e enginefuelfilterintoa smallcleancon-

elforpresenceofwater.Ifwater is

uantity,drainbothsets offueltanks.If

eris present,itisonlynecessarytopurge

nd enginefuelfilters.

ENTHOLE.Examineventholein

reitis open.Ifholeis plugged,cleanout

gOil.Referto paragraph45a(2)

tEqualized.

UTCHCONTROLLINKAGE.Frictionor

ollinkagebetweentheclutchpedaland

atedbyslownessof theclutchpedalto

after ithasbeenpusheddown.Todeter-

ofclutchequalizer,disconnectlinkageat

alslowlydownandup,andwatchaction

lowly,examinelinkageforbinding.Re-

dlubricateall frictionpoints.Connect

stactionof linkagebyoperatingpedal.If

returnsto"UP"positionnormally,friction

onofthis sectionofthelinkageasclutch

STMENT.Examineactionofclutch

etherlinkageisoutof adjustment.The

eenequalizersidelinksandhookedendsof

thesameonbothsideswhenadjustmentis


/ h t t p : / / w w w . h





ATESPRINGSANDDISKFACINGS.If

tchesisunequal,thereis nobindinginthe

adjusted,thecauseoftheunequalized

tooneof thefollowing:First,variationin

utchpressureplatesprings inthetwo

erenceinthefrictionoftheclutchdiskfac-

probablycausedbyoilorgrease.Glazed

seunequalengagementofthetwoclutches.

eterminedandcorrectedonlybythere-

ectionofboth clutches.

LFREETRAVEL.Lackofclutchpedal

mmoncauseofslippingclutches.Check

r.129j).

UTCHPEDALLINKAGE.Seesubpara-

NGSFORGREASEORGLAZING.See

NDISKFACINGS.Ifthevehiclelog

tchpedalfreetraveladjustmentshavebeen

onthatclutchdrivendiskfacingsareprob-

replaced(pars.132bandd).

BROKENCLUTCHSPRING.Aweakor

tespringinone clutchwillreducetheforce

clutch.Operateclutchpedalandwatch

ercockstooneside,removeclutch(par.

akorbrokenclutchspring.

LFREETRAVEL.Toomuchortoo

preventclutchpressureplatetraveltofully

kclutchpedalfreetravelandadjust(par.

nlycausefora draggingclutch,which

tremovingandinspectingbothclutches.

veclutchorclutches,inspectdiskfacings

dreplacedisksif necessary(par.132b

ssureplaterelease springsandfor

dreplaceifnecessary.

k-out.

FORBINDING.Bindingclutchlock-out

heeffortrequiredtopullclutchlock-outs

ectmechanism,freeandoilwherenecessary.

ABLESANDCONDUITS.Inspectcontrol

peradjustmentofcontrolcable,andcon-


/ h t t p : / / w w w . h





Instructions

nd<1)or adjust(par.130b)as required.

PilotBearing.

EASEANDPILOTBEARINGS.Exces-

utchrelease.bearingor pilotbearingis

e.Thenoiseoccurswhenthe engineis

gagedandwhenthebearingsturn.Remove

t,andifbearing isatfault,replacedefective

1,and134hand <1).

DUNIVERSALJOINTS.

OINTFLANGEBOLTS.Examineall

ndtightenas necessary.

TSFORWEAR.Totestfrontuniversal

clutches.Shifttransmissionintogear.

backandforth andmovingitupand

mentwillindicateuniversaljointbearings

e wornsufficientlytorequirereplace-

8c).Testrearuniversaljoint thesame

ninneutralandboth clutchlock-outsin.

BLY.

Left.If vehicleveerstotheright

auseis thatthesteeringbrakeonthe side

veersistootight. Loosenbrakeadjusting

tthecondition,theveeringisprobably

tside beingtootight,ora defectivebear-

a suspensionwheel.Checktracktension

er wheelbearing(par.158)andbearings

162).

raking.

REETRAVEL.Ifsteeringlevertravel

orebrakeshoesarefeltto contactbrake

adjusted(pars.144 and145).

INKAGE.Ifvehicledoesnotrespond

peration,andfreetravelof leverisnot

blelinkageisoutof adjustment.Inspect

42b and144b).

GFORWEAR.Ifvehicledoesnot

gaction,draindifferentialandremove

aminebrakelinings.Ifliningthickness.

brakeshoes(pars.146and147).


/ h t t p : / / w w w . h





RAKELININGS.Ifvehicledoesnot

gaction,brakeliningsmaybeglazed.I n

conditionexists,itisnecessarytodrain

akeshoeassemblyforexamination.If

e glazed,thecompletebrakeshoeassembly

bility.Inspecttracktensionand,if

par.156b).Iftracktensionis correct,

stment;andifbrakesaretootight,adjust

.

ntialorTransmission.

ESARETooTIGHT.Loosenbrake

es.

TRANSMISSIONOILCOOLER.Examine

agesandcleanout.

woillevelwill causethedifferential

erheatbecauseasufficientquantityofoil

ethegearsandtocoolthe brakedrums

s.Thisconditioncanbecausedbya leak

missionoilcoolersystem.Examinedrain

joints,tubes,fittings,hoses,andthetrans-

nceofleaks.Tightenconnections,and

edpartsasrequired.If thereisnoevidence

onoil pumpissuspectedasthecauseof

tubeatconnectionondifferentialcarrier.

velis upto"FULL"onbayonetgage.Start

missioninneutralat 1,000enginerevolutions

fromfitting,pumpisoperative.Ifno oil

not operatingandmustbereplaced.Make

cloggedoiltubes,cloggedtransmission,or

ostat.

TRANSMISSIONOILCOOLERTUBES.If

nectoilcooleroutlethoseatoil cooler.Place

nderoilcooleroutlet.Startengineand

utralat1,000enginerevolutionsper minute

mp.If oilisnot pumpedfromoilcooler

connectinlethosefromoil cooler.Ifoil

ose,thetransmissionoilcoolerinlettube

thinletandoutletoil tubesattransmission

woutwithcompressedairorreplace.If oil

catesoil cooleriscloggedoroilcooler

RMOSTAT.Ifoilflows totheoilcooler,

oolerthermostat(pars.141g(2)and (3)).


/ h t t p : / / w w w . h





Instructions

ctive,replaceitwitha newone.Ifther-

ooleris cloggedandmustbereplaced

rs(AHSpeeds).

SDoNOTRELEASE.Seeparagraph

cond,Third,Fourth,orFifthGears.

RSNOTFUNCTIONING.Ifthiscondition

otifyhigherauthorityimmediately.

ferential,orFinalDrive.

owprocedureinsub-paragraphd

IVEORWORNPARTS.Ifexamination

parts,replacethepartif thereplacementis

econdechelon;otherwise,notifyhigher

SIONSYSTEM.

Left.

N.Checktracktensiononsidetoward

djusttension(par.156b).

NGS.Aweakorbrokenvolutespring

owardsideon whichfaultyspringislocated.

or rearsuspension,itcanalsobe thecause

prings(par.163 c)andreplaceweak

h andd).

DLERSANDSUSPENSIONWHEELS.If

wheelbearing istootightor brokenso

y,thedragon thetrackwillcausethe

spensionwheelbearingandidlerwheel

agedbearings(pars.158or162).

SPINDLE.Abentidlerwheelspindle

er.It willalsocausethetrackto runnoisily

ack.Anidler wheelscrapedononeside

dinarilyindicatesabentspindle.Sight

wheel.Ifedgeisnot parallelwithvehicle,

ereplaced(par.158).

oisily.

Adeadorworntracklink willcause

noisily.Carefullyexaminetrackfordead

edoutof linewiththerest ofthetrack.

par.156e).Replacetrackblockswhose


/ h t t p : / / w w w . h





knessis wornbeyondlimitsspecifiedin

N.Aloosetrackwillrunroughlyand

onandadjust(par.156l>).Also examine

ent, replace(par.158).

CTORS.Excessivelywornendconnec-

oise wheneverpowerisappliedtothe

surfacesonendconnectors,andreverse

rs(par.156c).

EETH.Aroughlyrunningornoisytrack

eor wornsprockets.Ifsprocketteethare

rreplace(par.157).Tightenallsprocket

ts.Replacesprocketswithwornholes,

7).

EDORWORNSUSPENSIONWHEELTIRE.

eyarenotdamagedorwornbeyondtrack

N.Aloosetrackcaneasilybethrown,

gonrockyormuddyterrain.Thiscondition

unningroughlyand/ornoisily.Check

ar.156b).

SPINDLE.Seesubparagrapha(4)

NGS.Seesubparagrapha(2)above.

ANDINSTRUMENTS.

CHOFF.Turnon24-voltmaster

KER.Ifthestartersystemcircuitbreaker

setbuttonwillprojectabout1A inch.Reset,

y pushingresetbuttonin.If buttonsnaps

edin, itindicatesthereisa shirtcircuitin

notholdresetbuttonin. Seriousdam-

ateandcorrectcauseofshortcircuitbefore

voltmasterswitchison,and nocur-

sbeing supplied,testconditionofbatteries

er(17-T-5575) fordefectivecells.Iffound,

dtightenallbatteryterminalconnections,

ightenbatterycableterminalon24-volt

mbycrankingengineswithstarters.If

es,takea hydrometerreadingofeach


/ h t t p : / / w w w . h





Instructions

).Ifthe correctedhydrometerreading

50,rechargeorreplacebatteries.

ERSWITCH.Turnon24-voltmaster

ofswitchhandle.Seeifswitchhandlehas

einmasterswitchbox.Iflower edgeof

einbox, thuspreventingswitchfromseat-

ybeburnedandswitchmustbe replaced

ficientclearance,disconnectpositive

masterswitchterminalandfrompositive

tswitchendofpositivebatterycableto

h(terminalwithwireconnected).Leave

terminalinplace.Reconnectotherend

batteryterminal.Operatebothengine

operly,the24-voltmasterswitchis defec-

par.173). NOTE://anewswitchisnot

stestcanbeusedastemporaryrepair until

ed.Replaceswitchatfirst opportunity.

WITCH.Ifneithermainnorauxiliary

estarter,removewirefromsolenoidswitch.

n andtouchendofsolenoidwireto starter

saspark,itindicateswireis carryingcur-

defectiveandmustbereplaced.Ifnospark

arterbuttonor wireisdefective.Install

orrectthetrouble,removeandinstallnew

and c).

UIT.Ashortcircuitcanbecausedby

ation,adisconnectedwiremakingcontact

tioninthe electricalunittowhichthe

shortcircuitisalwaysindicatedwhenthe

tton,whichcontrolsthecircuit,is inthe

shootingforashort circuit,firstexamine

hecircuit.Atthesametime,lookfor dis-

metal.Ifthisdoesnotlocatethe trouble,

nnectthe"hot"(powerfeed)wirefrom

the end.Closeswitchesorbuttonsinthe

erresetbuttonin.If buttonsnapsout,

ire,whichmustberepairedor replaced

ortcircuitisin theelectricalunit.Replace

IT.Anopencircuitcanbecausedby

wire,corrodedorlooseconnections,damaged

chorswitches,ortroublewithintheelec-

ngfor anopencircuit,firsttestall instru-

chestoseethat currentisbeingsupplied

lectricalunits.Ifthereis nocurrentto


/ h t t p : / / w w w . h





connectionsonbothbatteryswitchesand

connectionsarecleanandtight,trouble

mbatteriestoinstrumentpanel,orin plug

eis currentattheinstrumentpaneland

withcircuitbreakerand switchesinthe

"hot"(powerfeed)wirefromelectricalunit.

nalofa testlampto"hot"wireand the

thevehicle.Iftestlamplights,current

sintheunit. Whentroubleshootingsiren

ttons,orlowoil pressuresignal,firsttest

h.Ifcurrent isindicated,thetroubleisin

releadingfromtheswitchtothe electrical

ed,testcircuitcontrolledbyanycircuit

ovehiclemasterwiringdiagram(fig.202)

alboxin thecircuittobetested.Inspectter-

selowvoltagetesteror testlamptoseeif wire

nalboxconnection.Iftest indicatescur-

s inthewireleadingfrom theterminal

e isnocurrentflowingto terminalbox,

wire atinstrumentpanelplug.Seemaster

orassistancein locatingfemaleterminal

oldone leadoftestlampin goodcontact

undotherleadoftest lampagainstmetal

mingbothcontactsaregood,iftestlamp

tyandmustbereplaced.Ifwiretests

hecircuitbreaker,switch,orthe male

ug.Replacedefectiveunit.Byreference

metestcan bemadeonallcircuitsnot con-

ANDSTARTER.Ifsolenoidoperates

rbut thestarterdoesnotcrankthe engine,

rdriveorstarter gear,ortheflywheelring

tarterassembly(pars.170b andc)orrefer

rity.

placethedischargedbatterieswith

nectthecablefromthepositiveterminal

nthe24- and12-voltmasterswitcheson,

bleagainstthepositivepostof thebattery.

est,it willindicatethatthereisa shorted

ectricalcircuits,orthatthecut-outpoints

arestucktogether.Referto subparagraph

gulatortest. Ifthegeneratorregulator

beassumedthe wiringisatfault.Notify

eWater.Seesubparagraphgbelow.


/ h t t p : / / w w w . h





eInstructions

wCharge.Iftheammeterfails to

lightsandobservewhetheradischargeis

bserved,connectanewammetertothe

el.If areadingisobtained,the ammeter

aced(pars.176bandc). Ifnoreading

thenexttest(subpar.e below).

NotChargetheBatteries.

movethearmatureandbatterywire

terminalsofthegeneratorregulator,and

weenthem.Removethefieldwirefromthe

tor.Startthe engineand,whileitis running

e endofthefieldwire tothearmaturewire.

ngineand notethechargingrate.

ethechargeabove50amperes.Ifthe

theengineis speededup,thegeneratoris

nnectthewiresto thegeneratorregulator.

otincrease,thegeneratorisatfault and

4cand d).

GULATOR.Starttheengineandr unit

olutionsperminute.Observetheammeter

no chargingrateisindicated,connectthe

dtheterminalmarked"ARM"together

atchtheammeter.Ifareadingis obtained-

ulatorisatfault.Replacethegenerator

c).Ifnoreadingis obtained,connectthe

togetherwiththejumper wire.Ifaread-

neratorregulatoris atfault.Replacethe

75bandc).

nBatteriesAreLow.Operatethe

0revolutionsperminute.Ifthecharging

aximum(50amperes),thegeneratorregu-

hegeneratorregulator(par.175bandc).

enBatteriesAreFullyCharged.

eed of2,000revolutionsperminute.If,

lacedthecurrentused bythestarterand

be fullycharged,theammetershowsa

peres,it canbeassumedthatthevoltage

gulatoris toohigh.Replacethegenerator

c).NOTE://thebatteriesgasfreelyand

salsoisan indicationofatoohigh-charging

perative.Ifauxiliarygeneratorwill

nbyremovingthe sparkplugwirefrom

artheenginewhilecrankingtheengine.If


/ h t t p : / / w w w . h





eauxiliarygenerator.Ifsparkis present,

g(par.225 c),andattemptstartingagain.

replacegenerator(pars.225eandf).

sNotChargeBatteries.Perform

aragrapheaboveon theauxiliarygenerator

gulator.

ative.

rnonthe24-voltmasterswitch.

reset buttonslocatedontheinstrument

te ofchargeofthebatteries.If the

heymustberechargedorreplaced.Clean

minalssecurely.Ifthe lampsstillfailto

ch.If thestarterfailsto turn,testthe

p(2)below).Ifthe starterturns,omit

proceedwithstep(3)below.

SWITCH(fig.7).Removethecover

itchbox.Turnonthe lightswitch.Use

acrosstheterminalsof the24-voltmaster

ht,replacethe 24-voltmasterswitch.

R.Disassembletheinstrumentpanel

ghtswitch.Useajumper wireandcon-

nthecircuitbreakermarked"LIGHTS."

circuitbreakerisat faultandmustbere-

erfailsto stayincontact(kicksout),

roundedorshorted wires.Ifthelamps

ithstep(4)below.

STOINSTRUMENTPANEL.Turnon

.Ifthe instrumentpanellightscomeon,

s complete.Ifthepanellightsdo not

knownnottobeburnedout itwillindi-

tbeingdeliveredtotheinstrumentpanel.

TFORLOOSECONNECTIONS.Remove

erybox,andtightenanyconnectionsfound

ntandterminal bar.

sLight,butNoOtherLampsWill

mentpanelandtestthecircuitbreaker

.j(3)above).Examinethewiremarked

hecircuitbreakermarked"LIGHTS"to

"onthelightswitch.If thiswireisin

minalsaretight itmaybeassumedthat

andmustbereplaced.

Light.Checkanylampsburnedout

seconnectionsatlightsandtightencon-


/ h t t p : / / w w w . h





eInstructions

gedwirestotheindividualunitgiving

lstolight,replacethelight switch.

nOutRepeatedly.Mostlamp

nwhenthe vehicleisoperatedoverrough

urmorefrequentlyin12-and 24-volt

6-voltsystem,duetothesmallerlamp

voltages.Cleanandtightenall connections,

econnections,andreplaceallbrokenground

generatorhasreplacedthecurrentused

batteriesareknowntobefully charged,and

geinexcessof 15amperes,itcanbeas-

tingofthe generatorregularistoohigh.

ulator.

edWires(CircuitBreakerMarked

thelightswitchtothe "BOMK"

kerkicksout,it indicatesthattheshorted

blackoutmarkerlightortheblackouttail-

switchtothe"HDLTS"position.If the

indicatesthattheshorted orgrounded

serviceheadlightsorin theservicetail-

airthedamagedwires.If thedamage

damagedconduit,replacethedamaged

ound.

Besurethehornorsiren circuit

hedin. Turnontheinstrumentpanel

hts comeon,itwillindicatethatcurrent

strumentpanelandtothehorn orsiren

hehornorsirenfromits mountingbracket

mpaint orcorrosiontoestablishagood

nor siren.Installthehornor siren.If

undafterestablishinga goodground,pro-

UTTON.Removethecoverfromthe

d contactajumperwireacrossthecon-

hornorsirennow sounds,theswitch

ustbereplaced.Ifthehorn orsirendoes

nor siren.

le.If airheatercoilsdonot buzz

makesurecircuitbreakeris notkickedout

jumperto the"hot"wireterminaltosee

ils.Ifthere iscurrenttothecoils, replace

ereis nocurrent,testcircuit(subpar.a


/ h t t p : / / w w w . h





eInstructions

erunning,butcurrentis stillnotavailable

escribedinsubparagraphsa(6) and(7)

tisfactorily,outletisfaulty.Replace

ESUPRESSIONSYSTEM.

s.Whenradiointerferenceresulting

ehicleis reportedorexperienced,the

oaplacewhichis comparativelyfreefrom

vehiclesormachinerywhichcouldbea

rnontheradioand checkthenoiselevel

hicleequipmentturnedoff.NOTE:Itwill

asignalonthe receiversothatthelimiter

perationenoughtoallowtheinterferenceto

e transmittedbyanothervehicletrans-

fromthevehiclebeingchecked,sothatthe

einterference.Noticethetypeofnoise

onsothat,whencheckingvehicleequipment,

or interferencecanbedetectedandalso

ntin thereceiverwillnotbeattributedto

n.Ifnoiselevelwithoutanyof thevehicle

oohigh duetoatmosphericsorotherout-

situationwillpermit,delayfurther checking

ratenoiselevelprevails.NOTE:Ifthe

nsufficientradiointerferencesuppressionis

ceiverofanothervehiclewhichisradio-

etofthe vehicletobetested,maybeused.

ndturretradioterminalboxcapacitors

fradio interferencedoesnotincrease

edisconnected,replacethem.Ifinterference

eavethe terminalboxcapacitorsdiscon-

fthetests untilthedefectiveequipmenthas

ndtested.Examineallshieldedconduitsand

ngsaretight,and thatconduitsandcables

ull atleastevery2feet.

nVehicleIsNotin Motion,But

erenceisin theformofawhiningnoise

nginespeedandcontinuesbutata lowering

hemagnetosareturned off,itmaybe

gsystem.Checkthegeneratorground

e,with sharpprodsattachedtoeachend,

eenthegeneratorframeandthegenerator

dgroundcorrectstheinterference,clean

teachendofthe groundcable.Iftheinter-

enagoodgenerator-to-bracketgroundis

ratorregulatorcapacitorandfilter(par.204


/ h t t p : / / w w w . h





stillpersists,thegeneratorpositivebrush

hebrushes andcommutatorareinneedof

stment.Replacegenerator(par.174c

AuxiliaryGeneratorOperating.

torbondstrapforgoodelectricalconnection

torassemblyandhull.Ifinterferenceisin

ingnoisewhichoccursatthesamefrequency

stops whentheauxiliarygeneratorstop

iarygeneratorsparkplug suppressorisat

.If theinterferenceisintheform ofa

nuesforafewsecondsafterthe stopbut-

eringpitch,replacetheauxiliarygenerator

yhigherauthoritythatthegenerator

erencesothatmaintenancetothebrushes

ementofthepositivebrushcapacitorsmay

ceoccursintheformof anirregularclick-

sbutslowsdownfora fewsecondsafterthe

uttonhasbeenpressed,replacetheauxiliary

ndcapacitor(par.204)..

nTurretIsPowerTraversed.Check

esure itissecurelymountedandmaking

thattheslipring connectionandatthe

othedlockwashersareusedunder the

ewswhichsecurethesectionofthe fighting

ffectedtothehullcrossmember.Tighten

ntsof shieldedconduitandseethatcon-

tleastevery2feet.Replaceturretswitch

ncestillpersists,traversingmotorisat

tyorreplacetraversingmotor.

nWindshieldWiperMotorIsOper-

henwindshieldwipermotorisoperated,

oristurnedoff,replacethemotorcapacitor

d ifnecessarytocompletelyeliminate

hecapacitorattheutilityoutletof the

a(1) and(2)).If noisestillpersists,

permotor.

inRadioWhenVehicleIsin Motion.

f vehicleisbelievedtobeexcessive,

dtoothedlockwasherfasteningsbetween

akesuretheyaresecureandmakinggood

oisepersists,notifyhigherauthoritysothat

orexcessiveelectricalresistancebetween


/ h t t p : / / w w w . h





Instructions

NANDMAINTENANCE

consistsoftwo wetordrysump,

ylinderin-line,2-cycleDieselenginesanda

and39).Thetwoengines,completewith

ebysideatthe rearofthevehicle.The

tedto theclutchhousingofeachengine.

hetwoenginesthroughthe transfergears

Each engineisliquid-cooledandhasits

er,fuelpump,andwetordry sumplubrica-

eisprovidedwitha generator.Individual

outs(fig.9)permitindividualenginestart-

mergency,thevehiclecanbepropelledby

thewetsumptypeofpowerunit,

hecrankcase(fig.41)andis pumpedto

Adetaileddescriptionofthis systemis

chenginein thedrysumppower

essure-typelubricationsystem.Inthis

ply,insteadof beinginthecrankcase(fig.

e,is containedinseparateoilsupplytanks

nginecompartment.Refertoparagraph

tionconcerningthedrysumplubrication

DATA.

s installedintheenginecompart-

dsandtransferhousingtowardthe front

44).Toavoidconfusioninorderingparts

gtoenginemaintenance,itisnecessaryto

ngdesignationsandterms:

Allreferencestori ghtandleft

se(fig.40).Theleftengine (designatedby

neserialnumberplate)ison theleftside

ntandvehicle.Therightengine(designa-


/ h t t p : / / w w w . h





dMaintenanceinVehicle

ghtside.Toavoidconfusionwhenorder-

edesignationsLCor LA.Donotusethe

s important,asallenginepartsin

istsandServicePartsCatalogsaredesig-

nes.Toavoidconfusionwhenre-

use theterms"fanend"and"flywheelend,"

nesareinor outofthevehicle.Donot use

rringtoendsof engines.

s.Toavoidany confusionbetween

eenginesandenginelubricationoil,only

uel oil"willbeusedto designatetheengine

"or "lubricatingoil"willrefertotheoil

esand othercomponents.

.40).

ne

Clockwise)

tesonthe powerunitshowmodel

ers.Theinformationontheseplatesis used

deringparts,andwhenrequestinginforma-

s.

LATE.Thisplateisattachedhori-

wheelhousinginspectionplate.When

ehicle,usemirrortoreadplate.

ERPLATES.Therightengineserial

eofthecylinderblockat theflywheelend,

filter.Theleftengine serialnumberplate

erblockatthefan end,behindthegovernor

neserialnumberisalsostampedinto a

directlyabovetheserial numberplate.


/ h t t p : / / w w w . h





nsfructrom


/ h t t p : / / w w w . h





/ h t t p : / / w w w . h





Instruction»


/ h t t p : / / w w w . h





dMo/ntenonceinVehicle


/ h t t p : / / w w w . h





e/nstructioni

ENERATOR

ram


/ h t t p : / / w w w . h






tinjection

torsDiesel

46

engine)6

aircleaners)593/4in.

)4,458Ib

nginescombined)375at2,100rpm

espeed2,100rpm

speed:2,250rpm

engine)425cuin.

1,000rpm)500psi

al)16to1

resttofan

ec.No.2-102B

ellershaft)800ft-lbat 1,500rpm

etsump)166gal

owertanks,each14gal)

rysump)148 gal

al;lowertanks,each14.5gal)

etsump(eachengine)28qt

rysump(eachtank)24qt

rysump(completesystemwith

ty(lubricatingoil)2Viqt

ch)3V2qt

NANCEINVEHICLE.

ragraphhbeloware operationsand

medwiththeenginesin thevehicle.These

detailinthe sectionspertainingtothe

ularunitinvolvedis apart.

nsWithEngineinVehicle.

EPLACEMENT.Refertoparagraphs


/ h t t p : / / w w w . h





Instructions

LRODj\CLUTCHRELEASELEVERS

DTRANSFERGEARHOUSING

RAINPLUG

werUnit-BottomView


/ h t t p : / / w w w . h






EMENT.Refertoparagraphs81c

MENT.Refertoparagraphs85b andd.



REPLACEMENT.Refertoparagraphs

NGREPLACEMENT.Refertopara-

ARINGREPLACEMENT.Refertopara-

ETREPLACEMENT.Refertopara-

ONTEST.Refertoparagraph62.


GOILPANANDGASKETREPLACEMENT.

graph100;for drysump,refertopara-

GOILPRESSUREREGULATORVALVE

ragraphs99cand d.

GOILSTRAINERREPLACEMENT.Refer

ERELIEFVALVEREPLACEMENT.Re-

dh.

DANDGASKETREPLACEMENT.Referto

USTMENT.Refertoparagraph61.

Refertoparagraphs122b andc.

PLACEMENT.Refertoparagraphs

Refertoparagraph74b.

G.Refertoparagraph74c.

ACEMENT.Refertoparagraphs74

LACEMENT.Refertoparagraphs72

MENT.Refertoparagraphs71e


/ h t t p : / / w w w . h





Instruction»

/itEngine— BottomView


/ h t t p : / / w w w . h





stallation

MENT.Refertoparagraphs77bandd.

RESENDINGUNITREPLACEMENT.Re-

dg.

ATUREWARNINGSIGNALSWITCHRE-

graphs127d ande.

STMENT.Refertoparagraph76.

TUBEREPLACEMENT.Refertopara-

ARNINGSIGNALSWITCHREPLACE-

s102candd.


NGUNITREPLACEMENT.Referto

CEMENT.Refertoparagraphs59b

RREPLACEMENT.Refertoparagraphs

NT.Refertoparagraphs170band c.

GINESPEEDS.Refertoparagraph79.

ERREPLACEMENT.Refertopara-

ACEMENT.Refertoparagraphs124b

TREPLACEMENT.Refertoparagraphs

EPLACEMENT.Refertoparagraphs123

CEMENT.Refertoparagraphs121b

NDINSTALLATION

erAuthority.Replacementofthis

worrebuilt unitisnormallyathird echelon

ormedinanemergencybysecondechelon,

ormingthisreplacementisobtainedfrom

der.Toolsneededfortheoperationwhich

chelonmaybe obtainedfromahigher


/ h t t p : / / w w w . h





:Instruction*


/ h t t p : / / w w w . h





stallation

eseinstructionspertaintoremoval

Slightdifferenceswillbeencountered

mpunit.Facilitiesforremovingandin-

i nclude:AnA-frameequippedwithtwo

fallsora wreckingtruckcapableoflifting

mpletelyclearthevehicle,twoheavycable

ainerstoholddrained coolingliquidand

mblystand(41-S-4987-77),andcleanre-

embliesandattachingparts.Theparts

bekeptsegregatedandplacedin related

o locatethesepartsreadilyforinstalla-

ftenmadeeasierifbolts withwashersor

rilyscrewedintotheirpositionsduringdisas-

chedtopartsremovedwiththenecessary

dnuts.Taggingofwires,hoses,tubes,and

quentlyaidsincorrectpositioningofparts

estime.CAUTION:Allopeningsandends

etapedto prevententranceofdirt.All

rotectedagainstdust,sand,andweather.

ofProcedure.Sequenceofthefol-

eis:disassemblyinfightingcompartment

nginecompartmentfromabove(figs.43

nenginecompartmentfrombelow(figs.

possibletodividepersonnelintogroups

tionscanbecarriedonat thesametimeat

ghtingCompartment.

valveto "OFF."

ANDWIRESINFIGHTINGCOMPART-

oxtopcover.Testbatteryvoltage(par.

arenot fullycharged,removebatteries

esarefully charged,disconnectground

emovebothstartercablesfrombatteries,

ackon terminals.Pullstartercablesout

placedonengineinout-of-wayposition.

omconduitstobedisconnected.

ENERATOR.Refertoparagraph225e.

LEFTSTEPS.Removeboltsandnuts

head,floor,andtoeachother.Lift steps

nt.

OOLER(fig.136).Disconnectthetrans-

moil tubes.Removeboltswhichattach

ngcoverandremovethecoverwithtrans-

dattached.


/ h t t p : / / w w w . h





Instructions

K

REATHERHOSE

AKETUBE

X

ER

ER

OZZLE

S

TES

ne Compartment— CoverPlatesRemoved

WHEELENDOFENGINE.Working

ning,removeboltwhichattachesengine

e mountingbracket.Unscrewhexagon

cttachometeradapteronthetachometer

riveoneachengine.Seethatshortdrive

meteradapter,whichisattachedtothe

gwithtapeto preventlosingthedrivekey.

goiltankventhoseateach engineflywheel

osebetweenfiller pipeandhullsideplate.

wolubricatingoilhoseconnectionsatthe

chengine(fig.44). Disconnectfuelreturn


/ h t t p : / / w w w . h





eInstructions

PARTMENTFLOORPLATES.Referto

NDLINES.Drainbothenginelubrica-

,par.94 b)(drysump,par.105b).

vispinfromthrottlecontrolrod, andre-

t bottomofclutchhousing.Disconnect

fromeachengineoilpan,andlay hoseson

ent,alongsideoiltanks.

RSUPPORTBRACKETBOLTS.Remove

twoenginesupportbracketsto engine

r.

omVehicle.

TOMAKESUREITIs READYFOR

ninfightingcompartmentandfromabove

artmenttoseethat allpartswhichwould

disconnected.

KSANDTACKLE.Attachenginelifting

tandrearenginelifter bracketsoneach

etoliftinghooks.

MENGINECOMPARTMENT(fig.47).

gcompartmentandontopof vehicleto

einghoistedout.Seethat fanendofpower

hullplate.Hoistfanendof powerunitto

eeangle.Graduallymovepowerunitrear-

beingliftedso transfergearcasewillclear

fergearcaseisclearof bulkhead,place

sin spacebetweenenginessotheywillbe

runit ishoistedclearofvehicle,move

theway,or ifthehoistis mobile,moveit

moveenginesupportbracketsandmount-

inesupportsweldedtothehullfloor atthe

t,andinstallbracketsoneachenginefly-

werunitintoatwinmotor assemblystand

e,oronsuitableblocking,topreventdam-

curepowerunittostandwithbolts.Re-

ftinghooks.

onsandOperations.Ifpowerunitis

acedwithanotherunit,performacareful

partsnotsuppliedwithreplacingunitare

werunit.Inspectallsuch partstodeter-

serviceableormust bereplaced.Regard-

owerunit istobe installedorreplaced,

onduits,andwireswhichweredisconnected

o determinewhethertheyaredefective


/ h t t p : / / w w w . h





siallation

LUG

G

G

NDUIT

G

orPlatesRemoved


/ h t t p : / / w w w . h





Instructions

roughlycleaninteriorofenginecompart-

owerunitremoved,itiseasyto inspect

t,andmanyunitswhicharedifficultto

lace.Carefullyinspectthehull andall

onduits,hulldrain valvesandcontrol,

rsaljoint,andotherpartsto determine

cementstobemadebeforepoweris

ofenginecompartment.

itforInstallation.Powerunitmust

atingcondition.Makesurethatstarters

earingsarelubricated(par.34).Clean

c).Examinepowerunitandallcom-

oil pans,emergencystopsolenoids,airinlet

pers,rockerarmcovers,andtransfergear

ureno partsaredamaged.Seethatall

theremovedpowerunitafter itwasre-

vebeeninstalledonthe powerunitwhich

le.Whenanotherpowerunitis tobe

lparts whichmustbetakenoffapower

romavehiclearetakenoffthe powerunit

ginesupportbracketsfromeachengine

bleenginesupportbracketstothetwoengine

orat frontofenginecompartment.Place

withprojectionsdown,onenginesupport

ortbracketontop ofpadandinsertfour

withprojectionsup,overthe fourbolts

eof enginesupport.Installsafetynuts

sofstarter cablesinspacebetweenthe

toftheway.Placethefree endsofthe

esalongsidethemanifolds.Positionengine

tionsdown,oncenterenginesupport

rofenginecompartment.

orInstallationofPowerUnit.See

isinreadinessforinstallationof powerunit.

osesmustbeout oftheway,andpositioned

side plates.Inletandoutlethoses

anksmust-beon hullfloorandstretched

agehoseandairheaterfuel supplyhoses

positionwheretheywillnotbedamaged.

gineCompartment.

KSANDTACKLE.Attachenginelifting

tandrearenginelifter bracketsoneach

etoliftinghooks.


/ h t t p : / / w w w . h





stallation

ATERPUMPS

LPAN

RAINPLUG

HUT-OFFVALVE

INGTUBE

LETHOSE

ACCESSPLATE

ER

HOUSING

G

loorPlatesRemoved


/ h t t p : / / w w w . h





eInstructions

werUnitFromVehicle

NTOENGINECOMPARTMENT.Raise

clear upperrearhullplateon vehicle.

runitorif mobilehoistisused,move

nginecompartment.Stationpersonnel

htingcompartmenttoguidethepower

edintoplace.Powerunitmustbetilted

tely30degrees,withfanendsofenginesup.

nvehicleasit isbeinglowered,withfan

upward;andcenterthepowerunit,using

enginesupportpadsonflywheelhousings

nesupportbracketsboltedtotheengine

dtothehull floor.Alsocentertheengine

dsofenginesover thesingleenginesup-

partment.Lowerthepowerunitonto

essarytolineup boltholesinbracketsand

ourboltswithlockwashersin each

.Removeliftinghookonflywheelends

ghookon fanendsofengines,hoist

that enginesupportplatecanbeslipped

ecentersupportbracketsandenginemount-

uslypositionedoncenterenginesupport


/ h t t p : / / w w w . h





eMechanism

heenginesupportplateintoposition,with

fan endofpowerunitas requiredtoline

urboltsincenterenginesupportbrackets

erenginemountingpad,withprojections

s onthebolts.Lowerhoistandremove

ynutsonall enginesupportbracketbolts.

ure.Tocompletetheinstallation,

edureinparagraphs56d,e, andf.Ifbat-

arging,theymustbetestedand thenin-

fenginecompartmentsplashpanel,doors

es,andrearuniversaljoint cover.

ure.Adjustclutchpedalfreetravel

nstallrearuniversaljointcover.Fill

ems(par.105c).Fill enginecoolingsys-

batterymasterswitches.Turnfueltank

H."Fillprimaryand secondaryfuel

dbleedfuel system.CAUTION:Imme-

arted,seethat oilpressure,gages,ammeter,

ctreadings.Withbothenginesrunning,

belowallfuel,lubricatingoil,and water

etsforleaks.Checkenginespeedsandsyn-

79).Testforequalizationofclutchen-

utoffenginesand installenginecompart-

4e). Installenginecompartmentdoors

<1).Install enginecompartmentfloor

ear universaljointcover.Roadtestthe

operationinspection(par.39).

ALVEMECHANISM

es(fig.48).Eachcylinderhead

edandinstalledasaunit, consistsofthe

vesandexhaustmanifold,injectorswith

atermanifold,andfuelinletandfuelreturn

atingMechanism(fig.49).Asingle

peratesthevalvesandinjectorsbymeans

s,androckerarms.Thethreer ockerarms

tedasanassemblyon ashortrockerarm

cketsboltedtothe cylinderhead(fig.48).

testheinjectoris mountedbetweenthe

eratetheexhaustvalves.


/ h t t p : / / w w w . h





Instructiont

M

G

KERARM

KET

ASKET

D

LD

W

Assembly


/ h t t p : / / w w w . h





echanism

50).Three drop-forgedrockerarms

der.Thetwoouterarms operatethetwo

enterarmoperatesthefuelinjector.Each

erateson aseparateshaftsupportedat

ngle capscrewfastenseachbracketto

ngthesetwocapscrewsandtheshaft

assemblytogainaccessto fuelinjector

ctorendof eachshaftinjectorrockerarm

allstudandball seat,whichformauni-

ansmits therockerarmmotiontothe

dofeachvalverockerarm ishardened

surfacewhichbearsdirectlyon theendof

msareoperatedfromthecamshaftthrough

etweenthecamfollowersontheends of

msiseffectedbycase-hardenedsteelrollers,

le-typerollerbearing.

ockerarmcoverbreather(par.95a)

ver.Closefueltankselectorvalve.Dis-

pipesfrominjectortofuelconnectors.Re-

whichholdtherockerarm shaftbrackets

emovebracketsandshaft.Loosenjam

od,usingwrench(41-W-1986-200)while

n open-endwrench(fig.51).Unscrew

.Cleanoutholesinrockerarms,

androckershaftwithDieselfueloil,a

essedair.Inspectbushingsinsiderocker

Makesurematingsurfacesonrockerarm

headareperfectlyclean.

erarmontopushrod.Position

kets.Installandtightentwo capscrews.

pipesfrominjectortofuel connectors

alveclearance(par.61b)andinjector

ustifnecessary.Openfueltankselector

tfor correctoperation.Stopengineand

stallrockerarmcoverbreather(par.

S

ressedsteelrockerarm cover,bolted

ersthemechanismwhichoperatesthe

coverisprovidedwithabreather which

thegbvernorbreatheroutlet.


/ h t t p : / / w w w . h





Instructions


/ h t t p : / / w w w . h





Mcchon/sm

RSEAT

ctorOperatingMechanism— Disassembled


/ h t t p : / / w w w . h





eInstructions

shRodJamNut

-200)

ecompartmentdoors.Raiseandlock

shpanel(fig.233).Disconnectrockerarm

vernoroutlet(fig.97).Unscrewthefour

urningthe knobs.Theendboltsare

arealso usedtoliftcover.Centerbolts

erisoff,inspectbreatherpadandclean if

orkrockerarmcovergasket.Ifitis

ewgasket.Thoroughlycleanallsurfaces

asket.Installrockerarmbreatherassem-

Lowerrockerarmcoverintoposition.

y.Installrockerarmcoverbreatherhose

enginecompartmentsplashpaneland

oltenginecompartmentdoors.

USTMENT.

waysbeadjustedorlashedwhen

partsof thevalveoperatingmechanism


/ h t t p : / / w w w . h





Wechoniim

NUTTHICKNESSGAGE

austValve

scase,valveclearancemustalwaysbe

porarilybeforeengineisstarted,and must

iswarmedup.

s.Warmupengines-to150° F.Stop

lutches.Removerockerarmcover.Crank

rystarterbuttonon engineairheatercoil

tsto moveinjectorfollowerinNo.1cylin-

certainthatexhaustvalvesinNo.1

nendvalvein No.1cylinder,measure

dofvalvestemandtherockerarm (fig.52).

012inch,a 0.011-inchthicknessgagewill

eninganda 0.013-inchthicknessgagewill

ct,itmustbe adjustedaccordingto

hcbelow.Checkclearanceofothervalve

stifnecessary.Whenvalveclearances

n No.1cylinder,cranktheengineuntil

linderhas starteddownandcheckclear-


/ h t t p : / / w w w . h





Instructions

LJUMPERPIPE

eCompressionWithCompressionGage

ylinder.Repeattheaboveoperationsuntil

ndershavebeencheckedand,ifnecessary,

rockerarmcover.

s.Valveclearancesmustbechecked

paragraphhabovebeforetheyare ad-

rect,adjustasfollows:Usepush rod

86-200)andloosenjamnutonpush rod

chfits thehexagononthepushrod and

ncesothata0.011-inchthicknessgagewill

eninganda 0.013-inchthicknessgagewill

shrod fromturningandtightenthejam

maychangeslightlywhenjamnutis

becheckedwiththicknessgages,andre-


/ h t t p : / / w w w . h





Mechanism


/ h t t p : / / w w w . h





eIn*lrutli

NTEST.

on.Startandrunengineto betested

utoffengineandremoverockerarm

omNo.1cylinder.Connectthefuelpipe

connectortothe fueloutletmanifold

ljumper.Install thecompressionadapter

ompressionpressuregage(41-G-125)in

cylinderhead (fig.53).Tighteninjector

surethatbleedervalveongage isclosed.

emblyinpositionandtightenbracketcap

usedonlytostart theengineandnot

newhilemakingcompressiontest.Open

ockoutbothclutchesandstartengineto

00 to450revolutionsperminuteuntil

ressureofcylinderisindicatedongage.

ereadingongage tocomputetheaverage

enbleedervalveongagetoreleasethepres-

erarmshaftbracketcapscrewsuntil

sandshaftover towardoutersideofen-

ectorclampboltandremovepressure

rburnedtipandsee thatrackmoves

placeifrequired (pars.74dandf).

njector,makingsureall connectionsare

nderinturnand repeatoperationsto

withenginerunningatexactlythesame

ylindernumbersandgagereadings.If

nyonecylinderis25 poundslessthanthe

ylinders,thecausemustbe determinedand

rtedtoa higherauthority.

KETREPLACEMENT.

ad.Removeenginecompartment

r.213c). Removesplashpanel(par.

electorvalves.Removeaircleaners

onintakehousing.Draincooling

vebothscrewswhichattachengineoil

ginethermostathousings.Unscrewwater

bowsonthermostathousing(fig.113).

chendofradiatorinlet (fig.114)andre-

wswhichattachelbowtoexhaustmani-

awayfrommanifold,andremovegasket.

ketoneachendofcylinderhead.Remove

chcylinderheadventtotheflywheel

(fig.38)and removevent.Atendof


/ h t t p : / / w w w . h





Mechanism

ctconduitsandwiresfromwatertempera-

fromsignalswitch.Drainenginefuel

mfuelreturnmanifold.Disconnectfuel

ig.62)andmoveoutof way.Disconnect

fromlever(fig.77).Disconnectspring

er.Removegovernorcover.Disconnect

rhoseandremoverockerarmcover(fig.

ofgovernorcontroltubelinkand remove

wswhichattachgovernorbreathertube

Removetwoscrewswhichattachtube

housingandremovebreathertube.Re-

chattachgovernorcontrolhousingto

Removetwocapscrewswhichattach

ocylinderstudnuts.Placeliftinghooks

teachend ofcylinderhead.Liftcylin-

ngitlevel soitdoesnot bindonstuds.

eadontoblocksplacedsoasnotto damage

belowlowerfaceofcylinderhead.Re-

derheadgaskets.

.Withthecylinderheadremoved

nspectionofpistons,cylinderliners,and

itionalrepairsare necessary,reportto

iarystarterbuttonandcrankengine

inecylinderlinersfromscuffingor scoring

topsofcylinders.CAUTION:Donot

kupwhile headisoff.Thoroughlyclean

ns.Examinecylinderblockforcracksor

s.Inspectcylinderheadforcracks.Care-

andiftheyare burned,replaceinjectors

ecamfollowerrollers,andiftheyare

efollowersbyremovingcamfollowerguides

outofcylinderheadfrom lowerside.Crank

necamsoncamshaft,andifdamagednotify

hlycleancarbonoutofcylinderhead

doffheadsofvalves.Examinethewater

nifoldforcracksorevidencesofleaking

required.Cleangasketsurfacesonthe

ow,cylinderblock,andhead.

ead.

etoncylinderhead.Install metal

ylinderblock.Attachliftinghooks

tends ofcylinderhead.Guidecylinder

eredonstuds,andkeepit levelsoitdoes

stmanifoldclearstheexhaustelbow,

psticks.Removeliftinghooks.Install


/ h t t p : / / w w w . h





Instructions


/ h t t p : / / w w w . h





Mechanism

uts withmachinedfacesdown.Screw

essure.Then,startingatthecenterand

wardeachend(fig.54),tightenthenuts

ounds.NOTE:Cylinderheadnutsmust

eenginehas beenthoroughlywarmedup.

ndinstall lifterbracketstoflywheel

.Usetwonewgaskets,andattachcylinder

singandcylinderhead(fig.38). Connect

the watertemperaturegagesendingunit

fwatermanifold.Connectfueltubeto

efuelfilter.Springexhaustelbowaway

ewgasket.Attachelbowtoexhaustmani-

ndlockwashers,andtighten screwsevenly

mly.Installunionnutoverend ofwater

ealontube,and tightennut.Installengine

hthermostathousing.Install radiator

hoseclamps.

dinstall engineliftingbracket(fig.

lanceweightcover.If governorcontrol

gaskethasbeendamaged,removegasket,

hellacnewgasketto housing.Install

par.77d(2) ).Installgovernorweight

new.gasket(par.77 <l(1)).Insert new

governorcontrolhousingandcylinder

wswithlockwashers.Tightengovernor

ndplatecoverbolts withfuelpump

Usingnewgasket,installbreathertube

housing.

oiloverthe partsinthetop ofgover-

ideinitial lubrication.Positioncontrol

controltubeleverandgovernordiffer-

orcover,usingnewgasket;tightenscrews.

ube,usingnewgasket;tightenscrewson

andtheclampboltsonoil coolerhousing.

leverlinktogovernorcontrollever(fig.

onnectgovernorcontrolleverretracting

81<1).Fillenginecoolingsystem

fittingon enginefuelfilter.Open

tank.Lockoutboth clutches.Start

ylinderheadwas installeduntilengineis

mineallfuel,oil,andwaterconnections,

tightenas required.Stoptheengine.

udnuts (fig.54)againusinga pullof

quewrench.


/ h t t p : / / w w w . h





Instruction*

rationofthe engineandpeakper-

rs(par.74c)and adjustallvalves(par.

erandbreatherhose.Start bothengines

ronizedenginespeed(par.79) andad-

ne compartmentcoverplatesandsplash

ONSYSTEMS

ystem.Thefuelsupply systemcon-

soffueltanks,a fueltankselectorvalve,

reachengine,andtherequiredfueltubes

toffueltanksis controlledbythefueltank

omthefightingcompartment(fig.136).

eithersetoftanks,dependinguponposi-

torvalvecontrolhandle.Fuelflowsfrom

the primaryfilterinthelowerfuel tank

theretothefuel filtermountedonthe

nginefuel filter,fuelispumpedtothe

sreturned totheupperfueltank through

rn tube.Continuouscirculationofthe

inghelpscool theinjectorsandkeepsthe

efore,itis unnecessarytoremoveair

onnectionoftubesorfuel filters.Afuel

thefilterhousingon theleftlowerfuel

heaterpumpsinthedriver'scompart-

stem(figs. 56and57).Thefuel

edry sumppowerunitcomprisestwo

nkselectorvalve,separateprimaryand

afuelpumpfor eachengine.Fuelfrom

inguponthe positionofthefueltank

ghtheprimaryfilterstothe fuelpumps.

fuelthrougha secondaryfilterandinto

suppliesthe injectors.Surplusfuelflow-

tothe fueloutletmanifoldispumped

ntinuouscirculationofthefuel helpscool

efuelfeed systempurgedofair.

hefuelinjectionsystemconsistsof

pushrods,springs,controltubes,and

haremountedbetweentheexhaustvalves

ad,injectthefuelunderhighpressure


/ h t t p : / / w w w . h





ystemi


/ h t t p : / / w w w . h





nstructions


/ h t t p : / / w w w . h





ystems

.Theinjectorsareoperatedbyrocker

ypushrodsfrom thesamecrankshaftas

espeedandpowerarecontrolledbyvary-

ectedintothecylindersthroughtheaction

nectedtoleverson asinglecontroltube.

ngineis connected,throughagovernor,to

orlinkage.

wosetsof fueltanksoneachsideof

fig.57).Eachsetconsistsofan uppertank

alower,or reserve,tankof14.5gallons

euppertanksareequippedwith fuel

elinbothuppertanks hasbeenused,the

rvefuelsupply.Theupper tanksare

g,pressure-venttypefillercapwhichwill

tthevent ifthevehicleshouldbeover-

onnectedtothe lowerbyaflangeand

hsetoftanksisfilled throughtheuppertank.

sare particularlysusceptibletodam-

fulto preventtheentranceofdirtor

pe hosenozzlesorfunnelscleanbefore

opening.Raisecoveroverthefillercap

fillercapandopening(fig. 58).Remove

ectorvalvecontrolhandleto "OFF"

eingfilled.Addfueltotanksuntil fuelis

omtopoffillerneck.CAUTION:Avoid

fillercap,close,andsecurecover.Re-

set oftanks.

tankdoes nothaveadrainplug

ghthe lowertank.Turnfuelselector

FF"position.Removedrainplugcover

hthevehicle(fig. 234).Placeasuitable

removethedrainplug. Aftertankshave

ug,covergasket,andcover,usinga new

maged.

ank(fig.59).NOTE:Thefol-

emovalofcylinderheadtoremoveupper

sfrombothsidesare toberemoved,the

he powerunit(par.56).

LINGSYSTEMS.Turnofffueltank

anks(subpar.cabove).Installdrain

plug cover.Draincoolingsystem(par.


/ h t t p : / / w w w . h





e/nstructions

gsonLeftSide

PARTMENTCOVERPLATES,DOORS,AND

aragraphs213and214.

GSYSTEMTUBESANDHOSES.Discon-

ystemtubesandhosesbetweenradiatorand

ndradiator(par.119).Removeexpansion

late.

EOUSITEMS.Removeaircleaners(par.

openingstoprevententranceofdirt.Re-

nd bracket.Disconnectwiringandre-

ntterminalbox.

OVERPLATE.Removefireextinguisher

rplate.Removeupperfireextinguisher

adsto lowerrearnozzle(fig.238).Re-

pperfueltank;disconnectandremovefuel

g.57).Removesponsonplatecapscrews

gagewirefromupperfuel tankgage

ueltankcapandfillerneck.Liftout the


/ h t t p : / / w w w . h





ysttms

SANDDISCONNECTFUELRETURN

tankclampboltsandbendclampsoutof

mpanddisconnectfuelreturnhosefrom

rdendof upperfueltank.Removethe

CONTROLHOUSING.Refertopar-

LTER.Refertoparagraph109.

EAD.Refertoparagraph63.Com-

erblockwithheavycardboardtoprotect

movingcylinderhead.

LTANKS.Cutasectionfromthespon-

passageoffuelgagetankunit.Work the

nsonandacrossengineuntiltankcanbe

artment.Removewoodspacersfrom

lTank.

ANKINSPONSON(fig.59).Place

sitioninsponson.Worksmall endof

first andswingtankintoplace.Bend

tionandinstallclampbolts.Install fuel

onnectwiretofuel gagetankunitterminal.

AD.Refertoparagraph63.

CONTROLHOUSING.Refertopar-

ICATINGOILFILTER.Refertopar-

VERPLATE.Positionsponsoncover

chconduitandclampstoinner side.Line

nd installcapscrewsandbolts.Install

angeonupperfueltank,andconnecthose

shuttercontrolcablefromfighting com-

hutterlever.Tightencablehousingjam

lcableand clampsonsponsoncover

hertubingnozzle.

OUSITEMS.Installengineoilfiller

nginecompartmentterminalboxand

figures207 and208.

ANK.Installexpansiontankonspon-

ubesandhosestoradiatorand engine.

NGSYSTEMS.Refertoparagraphs65

ndtubeconnectionsonbothsystemsfor


/ h t t p : / / w w w . h





e/nstructions

atingandFuelSupplyTanks


aragraphs213and214.

ank.Toremovethelowerfueltank

ment,itisfirstnecessaryto performthefol-

LINGSYSTEMS.Turnofffueltank

anks(subpar.cabove).Draincooling

RPLATES,DOORS,ANDSPLASHPANEL.

nd214.


/ h t t p : / / w w w . h





ystems

TANK.Disconnectandremoveexpan-

and hoses.Removeexpansiontankfrom

RS.Refertoparagraph81c.

ertubeconnectiontorearuppernozzle,

rews,andmovebracketandnozzleoutof

TANKOUTLETFLANGE.Loosenhose

rews,andremoveoutletflangeandhosebe-

k(fig.57).

OUSING.Refertoparagraph82.

LTANKFILTER.Removeenginecom-

16b).From beneathvehicle,disconnect

r housing.NOTE:Disconnectairheater

usingifleftlowertankis toberemoved.

s-fromfilterhousing,andremovefilterhous-

movegasketfromfilterhousingopening.

LTANK.Removetankholdingstraps

eplate(fig.59).Prylowertank away

odspacers,andlifttank fromenginecom-

elTank.

KINENGINECOMPARTMENT.Place

pacerin enginecompartment.Installthe

nk,connecthosetouppertankoutletflange,

tank.Tighten hoseclampssecurely.

hicle,cleangasketsurfaceonfilteropening;

l fuelfilterinlowertank.Connectfuel

lllowertank retainingstrapstohullfloor.

ntfloorplate(par.216c).In theengine

pperretainingstrapstolowerfueltank.

OUSING.Refertoparagraph82.

ISHERNOZZLE.Positionnozzlebracket

stallscrews,andtightentubeconnectionto

S.Refertoparagraph81d.

ANK.Positionexpansiontankonspon-

attachingscrews.Connectexpansiontank

r,and tightenhoseclamps.


aragraphs213and214.

NGSYSTEMS.Refertoparagraphs65

9


/ h t t p : / / w w w . h





Instructions

nkFilter— Disassembled

TROLSWITCH.

geandcontrolswitcharemounted

htcornerof theinstrumentpanel(fig.12).

evel offuelonlyin theupperfueltank

dinguponthe positionofthecontrolswitch.

ectricallybythe gageunitinthe upper

switchlevertoeither"R" or"L"will

therightor leftupperfueltank,respec-

emovetheinstrumentpanelcase

escrewsandwashersfromplugreceptacle

ceptaclecaseoutofthe wayasfarasat-

onnectthetwowiresfromgageterminal

shield.Removenutsand lockwasher

,andremovethegagesupportbracket.

.Positionthefuel gageandsupport

panelcasecover,andinstalllockwashers

shieldongageterminalposts.Connect

terminalandNo.74wireto thefuelgage


/ h t t p : / / w w w . h





yirems

ockwashersandnuts,and tightense-

ptaclecaseonsupportposts,installlock

ghtensecurely.Installinstrumentpanel

ontrolSwitch.Removetheinstru-

r.186<1).Removeswitchleverholding

witchlever.Removeswitchlocknut,lock

ositionplate.Disconnectthethreewires

flatwasherfrominstrumentpanel face-

ControlSwitch.Installthe flat

dpositionswitchoninstrumentpanel

welpinonswitchseats indowelpinhole

tchleveronplate ondowelpin.Install

knut.Installswitchlever,lockwasher,

ctNo.70wiretoNo. 1terminal,No.74

dNo.71 wiretoNo.5terminal (fig.202).

nutssecurely.Installinstrumentpanel

rnbatterymasterswitch"ON"and

nstallation.

.

tankunit ismountedintheupper

nks(fig.56).Itconsistsof afloatand

ndsdownintothetank.Variouspositions

willcutin resistance,varyingthecurrent

gewhichregistersthe leveloffuelinthe

ationsforremovalofupperfueltank

d,untiltankcanbepulled outfar

eunit.Disconnectthewirefrom thegage

achingscrews,washers,andgasket,and

k.

asketandinstall fuelgagetankunit

wsevenlyandsecurely.Connectwire

wprocedureforinstallationofupper

ragraph65e.Fillthe fueltanks(par.

ectionsforleaks.Turn"ON"battery

erationoftankunit byturningfuelgage

ksserviced.

ersseparatetheforeignmatterfrom

e injectors.Theinjectorsareprotected

l,whichmaybeinthe fuel,bytwosmall


/ h t t p : / / w w w . h





Instruction*


/ h t t p : / / w w w . h





yst«ms

LHOSE

ndEngineFuelFilter

ody.Thefuel filterinstalledineach

ascreen-typeelementwhichprojects

edontheinsideto thefilterhousing.A

eelement,ismountedoneachengineat

er.Cleanthefueltank filterelement

powerunit isremoved.Makesurethat


/ h t t p : / / w w w . h





InHruttions


/ h t t p : / / w w w . h





eInstructions

elPump,UsingFuelPump


/ h t t p : / / w w w . h





ystems

ndcapscrews,andtightenevenly.Con-

using.Fillupperandlowertankswith

ter.Tun.fueltankselectorvalve

sitiononsetof tanksbeingserviced.

tanks (par.65c).Removeenginecom-

16l>).Frombeneaththe vehicle,dis-

housingand stopthemuptoprevent

ofdirt.Removecapscrewsandlockwash-

singtofuel tankflange(fig.60).With-

omfueltank.Removethegasketfrom

Filter.Install newgasketonfuel

assemblyinlowerfueltank.Install lock

ndtightenevenly.Connectfueltubesto

dlower fueltankswithDieselfueloil.

efueltubesandconnectionsforleaks.In-

floorplate(par.216c).

ter.

LFILTER.Openthefilterdraincock

ddrainapproximately1Apintto remove

nt.Thenclosethedraincock.

ELFILTERELEMENT.Turnfuel

lhandleto"OFF"position.Openthe

he filtershell(fig.62).Removethe

clothsoakedinDieselfueloil. Close

sketsthroughoutandreplacefilterele-

hefilterand installoncoverbracket.

controlvalveto eitherrightorleft set

ectbothfueltubesto enginefilterand

ows.Usingasmall funnel,pourclean

litflowsfrom theoutletopening.In-

ctthefuel tubes.Tightenconnections,

orleaks.

ilter.Turnfuel tankselectorvalve

Openthedraincock(fig.61)on the

ell.Disconnectbothinletandoutletfuel

emoveshellbyunscrewingstudatbot-

l,gaskets,andelement.Removetwo

rtocylinderheadandremovethefilter

elFilter.Install filtercoveroncylin-

enscrews.Connectinletandoutletfuel


/ h t t p : / / w w w . h





nstructions


/ h t t p : / / w w w . h





ystcms

ATER

E

mpsandShut-offValve

crews.Installthefilterelementand shell,

oceduretofillthe filtershellasoutlined

e.

RVALVE.

kselectorvalvecontrolsthefuel

nks (fig.136).Withvalvein"RH"

bothenginesfromthesetof tankson


/ h t t p : / / w w w . h





aInstructions

peratingMechanism

H"position,fuelsupplyisfromthetanks

turnfuelfromtheinjectorsispumped

setinuse.

necompartmentsidecoverplateand

enginecompartmentsplashpanel(par.

anerstowardflywheelendofright

hright andleftfueltanks,ifnecessary,

etsoftanksis lessthanthree-quartersfull.

fuel tankselectorvalve.Infighting

utandremovevalvehandle.Unscrewtwo

te whilevalveisbeingsupportedin


/ h t t p : / / w w w . h





yst«m«

isheldin positioninenginecompart-

mfightingcompartmentsideandtighten.

htennut.In enginecompartment,at-

tightenallconnections.Installthetwo

ctorvalveto"RH"or "LH."Start

connectionsforleaks;thenshiftfueltank

of tanksandagainexamineconnections

ashpanel(par. 214e).Installengine

plateanddoor(par.213d).


/ h t t p : / / w w w . h





Instructions

steeltubesareusedwherearigid

dareconnectedinthe fuelsystemby

seor specialcompressionfittings(fig.57).

othe steeltubesbythumbscrewhose

reheavyvibrationorrepeatedmainte-

cipated.Thesteeltubesarefastenedto

ompartmentbulkheadbytubeclamps.

tubesfrequentlyforleakageinthe

the fittingsandhoseclampsonlywhen

eakage.CAUTION:Donotovertighten

magetheseal.Replaceallcrushedor

oses.Ifa tubeorhosecontactsany

nchafingor restriction,itmustberepo-

ventcontact.Dueto adequatefiltering

enecessarytoremovefueltubesor hoses

hefueltubefittingscarefully.Use

opersizeto holdelbow,bushing,ornipple

penfittingsandtubes withtapetopre-

ot bendthesteeltubesto gainaccessto

etubeswherepractical.

allation,makesurethreadsandsleeves

e ofdirtparticles.Springthe steeltubes

thethreadssquarely,toavoidcross-thread-

ewhentighteningconnectionstoprevent

singthethreadsorconnections.When

eeltubesforreplacement.Whenneces-

tsforbulklength,firstmeasurethe devel-

bereplaced.Cutthenewtube ofsuf-

ends.Use extremecareinbending

g.Inmanycases,bendscan bemade

sedinformingtheoriginal tube.After

thendsoffwitha finefile.Removethe

eoftube.Placethecorrectnutandsleeve

pismountedon therearendof the

heelendof eachengine(fig.62).The

vanetypewitha capacityofapproxi-

at 2,000enginerevolutionsperminute.

lowerrotorshaftofthe blower.A

(fig.62)inthe pumpbodypreventspres-


/ h t t p : / / w w w . h





ystem»

orOperationWithEngineRunning

ove55poundspersquareinch. The

neismarked"RHIN"andthe pump

marked"LHIN."Therelief valves

mbledfacingin oppositedirections,and

lowedwheninstallingthepumps.

pumpcoverantfbody,andthegaskets

ventinpumpflange,it indicatesde-

mp mustbereplaced.Removethefuel

drotatethe pumpshaft.Itshouldturn

lay.The fuelpumpwillnotbe dis-

ms,butwill bereplacedasaunit. Install

using(subpar.f below).

.Disconnecttheengine fuelfilter

er fuelmanifold(fig.62).Connecthose


/ h t t p : / / w w w . h





eInstructions

ector,UsingTimingGage(41-G-198-SO)

G-198-75)totubeand fuelmanifold.Run

lutionsperminute.Fuelpressuregage

oundspersquareinch.Stopengine,discon-

ses,andconnecttubeto fuelmanifold.

y.Inthefuel systemoftheengine

ctthefuelreturnhosefromthefuel return

64).Attachhose ofsuitablelengthto

n,placetheendofthe hoseinasuitable

neat1,200 revolutionsperminute.Fuel

stl/2 gallonoffuelperminute inexcess

gine.Stopengineandconnecthosetotee.


/ h t t p : / / w w w . h





ystems

elInjector,UsingRemover(41-R-2370-200)

rolvalveto"OFF"position.Remove

)whichareabovethefuelpumpbeing

housingtoprevententranceofdirt.Re-

hesbrackettodripshield (fig.62).Dis-

thefuel pump.Removethecapscrews

blowerhousingwithfuel pumpwrench

.Removedripshieldandgasket.Re-

nerendofrotor.

marked"RHIN"mustbe installed

fvehicleandfuelpumpmarked"LHIN"

sideofvehicle.Bothpumpswillbe in-

ctiontowardthecylinderblock.Install

apscrewsandlockwashers.Placecoup-

rotorshaftwithendsof forkawayfrom

onpump flangeovercapscrews.Install

makingsurecouplingforkengageswith

pscrewsandlockwashers,andtighten


/ h t t p : / / w w w . h





nstructions

OCKERARM

ositionWhenRemovingInjector

nch(41-W-1495-100).Attachdripshield

nectfueltubesto pump.Installair

uel controlvalveto"ON"position.

elpumpandconnectionsforleaks.Tighten

nifoldsaremountedontheouter

fig. 66).Fuelinjectorsaresuppliedwith

nletmanifoldwhichisconnectedtothe

he uppermanifoldreturnstheexcess

ugha hoseandfueltubeto thesetof

wn.

eupperandlowerfuelmanifolds

thetaperedseatsin themanifoldteesfor

at.Afterinstallationoffuelmanifoldsand

nectionsforleakage.

eaners(par.81c)andcoverairintake

rmcover(par.60b).Disconnectfuel

olds.Disconnectinjectorconnectorpipes

66).Loosenpipesatinjectorsandswing


/ h t t p : / / w w w . h





yirems

senlocknutsonconnectorsandscrewcon-

d.Discardthecopperwashers,forthey

mustbe replaced.Removemanifoldswith-

sincylinderhead.

incylinderheadfor fuelmanifold

ean.Install themanifoldinthelower

eadwiththe teesonthetopside. Install

anifoldconnectorsandscrewconnectors

ovingmanifoldtoseateachconnectorin

nconnectorsevenlyandturndownlock

ashers(fig.66).Connectinjectorconnec-

dconnectors.Tightenpipesatinjectors.

nifoldwithteesonbottomside.Usenew

toperationstoinstallconnectors.Connect

fold,andfuelhosetoreturn manifold.In-

.Startengineandcheckallconnections

elconnectionsmustbeleakproof.Diessl

erheadwilldilutelubricatingoil andcause

bearings.Installrockerarmcover(par.

PS.

heaterpumps,onefor eachengine,

ket-mountedinfrontofthedriver (fig.

operatedtosupplyfuelto theairheaters

weather(par. 26).Thepumpsaresup-

ftlowerfueltankandare bothconnected

singlejumpertube.Operationofthepumps

bedinparagraph17 d.

airheaterfuelpumpswill consistof

erpistons.Turnpumpshut-offvalveto

hepumpplungerasoutlinedinsubpar-

pistonretainingscrewatendofthe plunger

ndseparatorwasher.Installnewpistons

kingsurethatcuppedendsofthe pistons

r.Installretainingscrewandtightense-

erinpumpbodyand tightenpumpplunger

valve,workthepumpsto testoperation,

rleaks.

ut-offvalveto"OFF"position.Dis-

mptobulkheadtubesat bothpumps(fig.

mpertubeatthe elbowontheteebe-

wboththepumpplungernutand pump

odies onthefaceofthebracket.Pull the

mpsandremovethe panelnuts.Remove

p.


/ h t t p : / / w w w . h





Instruction*

wsonnewpumpsin sameposition

nnectpumpswithtee.Removeplunger

hpumps.Adjustnuts onpumpbodiesso

oughbracketsufficientlytopermittighten-

ofthebracket.Installpumpplungers,

ndpanel nuts.Connectthefueljumper

eecrossconnectionbetweenthepumps.

mp-to-bulkheadtubestobothpumps.Turn

doperatepumpstocheckall connections

ectors(figs.68and 69)aremounted

eir spraytipsprojectingintothecylinder

einjectorsaccuratelymeasurethefueland

ayintothe cylindersattheendofthe

piston.Combustiontakesplacewhenthe

hthe airwhichhasbeenheatedbythe

hecombustionchamber.Theinjector

eat thelowerend,andagear nearthe

withtheteethin theinjectorrack.Moving

heplungerandchangesthe positionof

hefuelports.Thisaccuratelymeasuresthe

eachstroke.Whenthe rackisalltheway

offuelis injected.Iftherackispulled all

cted.

Withtheenginesstopped,place

d openfuelcontrolvalvesoneither

nks.Lockoutbothclutches.Remove

S.Startthetestoncylinderwhichhas

d.Pressdownontheinjectorfollower

ntiltheinjector"pops."If theinjector

sprobablyingood condition.Crankthe

exhaustvalvesin theothercylinders

l injectors.Replaceanyinjectorthat

"pop."

ATION.Totestinjectoroperation,run

holddownoninjectorfollowertoshut

thereisnochangein theoperationof

catesthatthe injectorisnotfunctioning.

djustingscrewsonrackcontrollever(fig.

bemovedfreelyinandout.Hold the

ylindershouldfirewithasharp,loud

the cylinderbeingtestedwasfound


/ h t t p : / / w w w . h





Systems

ping"testandfailstooperatewiththe rack

ossofcompressioncausedbyfaulty

mpropervalveadjustment.Replacede-

cttheinjectorracksetting.Ifthis does

fertoTrouble Shooting,paragraph46.

eplungerfollowerofeachinjector

edtoacertainpositionin relationtothe

ctorisinstalled intheengine.Pull

"positionandlock.Crankengineman-

exhaustvalvesarefullyopenedinthe

stalltiminggage(41-G-198-50)intop

ongagestemmust beseatedoninjector

milledflatsonthe gagefacingtheinjector

dpushrod fromturningandloosen

knutwrench(41-W-1986-200).Adjust

inggageheadisrotated,the bottomface

njectorfollowerguidewithnopercep-

ushrodjamnutand againchecksetting

mingoperationoneachinjector.

selectorcontrolvalvesto"OFF"

nfuelmanifoldconnectorsandmovefuel

kerarmshaft.CAUTION:Coverin-

rwithtape topreventdirtenteringthe

mshaftbracketboltsevenlyuntilfreeof

rmsandshaftovertowardoutsideof

ut,washer,andinjectorclampfrom

ver(41-R-2370-200)topryupevenly

dofrackcontrollever (fig.72).Remove

gincylinderhead.

ectorsforburnedtips,cloggedholes,

moreinjectortipshavebeenburneddue

her tipswillhaveenlargedholesandthe

.Allofthe injectorsinanysingleengine

.Theuseoftwodifferenttypesof injec-

llcauseanoticeabledifferenceinpower

rspeeds,andmakeitdifficultto tunethe

mustmovefreelyinand outwithout

rleaksaroundtheinjectorbodymust

rity,as itmaybenecessarytoreplace

y.

ectorbodynutand coppertube

nsertinjectorinholeso thatdowelpin

olein cylinderhead.Lightlytapinjector

orrackoverend ofcontrollever.Install


/ h t t p : / / w w w . h





Instructions

sher,andnutonhold-downstud.Tighten

foot-poundspullontorquewrench.

ctorhold-downclampmorethanthe

lldamageseatatlowerendofcoppertube.

blyandtightenbracketboltsevenlysoas

s.Removecoveringfrominjectorfilter

oinjector,andtightenfittings.Position

Timetheinjectorwhichwasinstalled

gineuntilit warmsupto100° F.In-

orleaks.Adjustexhaustvalvesoncylin-

stalled(par. 61).

k.Afterinstallationofanewinjector

stbeadjusted tocorrespondwiththat

mountoffuel injectedintoeachcylin-

ackposition.Whenmore thanone

,followtheproceduregiveninpara-

OLLEVER.Disconnectgovernorcon-

rcontrollever.Pull governorcontrol

heinjectorracksallthe wayinto"FULL-

osenadjustingscrewsoninjectorrack

ethenewlyinstalledinjector.Screw

wuntilinjectorrackmovesinand strikes

ksjuststart tomoveout.Tightenthe

jectorcontroltubelever;thenlock the

KPOSITIONS.Afterpositioningthe

otherrackstodetermineifanyhas moved

he otherracks(fig.75).Ifany ofthe

positionedleverwas settoofartoward

rbybackingoffonthe innerscrewand

ingscrew.Checkinjectorrack"No-FUEL"

egovernorcontrolleverforwardinto"No-

noninjectorcontroltubelever.Injector

-]\„inchto apositionwheretheround

proximatelyV&inchfrominjectorbody.

leverrodtogovernorcontrollever.

BES.

rcontroltubes(figs.68and 72)carry

choperatetheinjectorracks.Thetubes

ndhavea coilspringwhichmaintainsa

tendingto holdtheinjectorracksin

xcontrolleversoneachcontroltubeare

hattheracksettingfor eachinjectorcan


/ h t t p : / / w w w . h





yst«mi

ctorRackControllever

yoftheothers.Theinjectorcontroltube

ube leveratthefanend ofthetube,

ernorcontrollever.

kerarmcover(par.60b).Disconnect

tcontroltubelever. Removecontrol

pscrewsandlockwashers,andliftout

ssembly(fig.77).

roltubeis tobereplaced,theinjector

etakenoffthe tuberemoved,andinstalled

bracketofftheendofthe tubeopposite

enadjustingscrewsontopof eachin-

lytopermitleverstomoveon thetube.

ng,and tubebracketoffthetube.Re-

ontroltubemountingbracket.

ntroltubemountingbracketbearings,

orn.


/ h t t p : / / w w w . h





Instructions

orRackPosition

gineachcontroltubemounting

tubewithfootpointingtowardcontrol

springon tubeagainstthebracketwith

m bracket.Slideleversontubeoneat a

swillextendtowardinjectorswhenassembly

d.Centerthe leversovertheadjusting

andmovebackandforth whileturning

stoenterthe screwsinthenotches.Donot

ws.Installremainingbracketwithfoot

endofengine.

ctorcontroltubeassemblyoncylin-

ckssotheywill engagetherackcontrol

screwsandlockwashers.Operatecontrol

ngbracketscrews.Makesurethereis no

bearingsafterscrewsaretight.Hookend

djacentrackcontrollever.Connectgov-

ever.Alinetheinjectorrackcontrollevers

hereis nobinding.Adjustinjectorrack

).


/ h t t p : / / w w w . h





ystems

No-fuelPosition

STMENT.

RuckControlLevers.Bestengine

umpoweroutputcannotbeobtainedunless

edaccuratelywithrelationtothegovernor.

ustbeadjustedto operateallinjector

ualpowerwillbe developedineachcylin-

nthe ordergiveninthefollowingpro-

OLLEVERFORINJECTORINNo.1

ernorcontrollevertopositioninjectorracks

e"FULL-FUEL"position.Loosenthead-

all thewayin.Turndownthe innerad-

rollever.Whenadefinite increasein

lingadjustingscrewintheend ofthe

eoutwardslightly.Backoffone-third

gscrew.Turndowntheouteradjusting

einnerscrew.

KCONTROLLEVERADJUSTMENT.

lever(fig.74)fromidling to"FuLL-FuEL"

asedresistanceismetatthe endofits

erwhichoperatesinjectorinNo.1 cylinder

the injector.Correctthecontrollever

htlyoninner adjustingscrewandtighten-


/ h t t p : / / w w w . h





Instructions

linkage


/ h t t p : / / w w w . h





y.tems

LCAMLEVER

EVER

AM

AP

CKNUT

BE

BERETURN

BELEVER

LLINKPIN

UBEBRACKET

LLINK

P

NGSHAFT

PERBEARING

HOUSING

GSHAFT

WERBEARING

GSHAFT

HAFT

EARING

OUSINGCAP

SHAFTTHRUST

HOUSING

HOUSING

EEDWEIGHT

EEDWEIGHT

CARRIER

EAT

TIALLEVER

LUNGER

LCAMSPRING

MBLY


/ h t t p : / / w w w . h





Instructions

ewto lock.Recheckpositionofrackcon-

dure.Next,holdgovernorcontrolleverin

ushdownfirmlyon theinjectorcontrol

ctorin No.1cylindermustmoveslightly

eforean increaseinforceisrequiredand

rewonthe governorhousingbeginsto

movesoutmorethan %•>inch,backoff

everouter adjustingscrewandtighten

ONTROLRACKS.Pullcontroltubelever

rinNo.1cylinderall thewayinto"FuLL-

neradjustingscrewonthe nextrack

chesendofstroke,but doesnotcauseper-

entofrackforinjectorinNo.1 cylinder.

dlocktheinner screw(fig.74).Usethe

emainingrackcontrollevers.

ITIONOFINJECTORRACKS.Holdthe

No-FuEL"position.Notepositionofin-

nonthe injectorcontroltubelever.The

%5inch.In thisposition,thedistance

ck totheinjectorbodymustbe 2%2inch

ntrollinktothe governorcontrollever.

nposition.

SPEED.Refertoparagraph77 e(2).

eisequippedwithaspeed-limiting

mechanicalgovernor(fig.77).Thegov-

ontoftheblowerandis drivenbytheupper

vernoris adjustedtoprovideanengine

tely400revolutionsperminuteandlimits

volutionsperminute.Ifthegovernorgets

removalandinstallation,adjustthe injec-

.76a) andadjustthegovernor(subpar.

usuallyisremovedastwosubassem-

housingandthegovernorweighthousing.

NORCONTROLHOUSING..Removethe

ofinlethousing(par.81 c).Removecot-

sconnectthrottlerodatgovernorcontrol

pringfromgovernorcontrollever.Re-

chattachbreathertubetooil coolerhous-

hichattachbreathertubetogovernor

ovebreathertube.Takeoutfourscrews


/ h t t p : / / w w w . h





nSystems

EIGHTHOUSING

vernor

ernorcontrolhousingandremovecover

rmcover(par.60b).Removecot-

disconnectgovernorcontrollinkatinjector

Removetwoboltswhichattachcontrol

Removefourboltswhichattachgovernor

orweighthousing,andtakeoffcoverand

fcontrolhousingtowardcylinderblock

etwo dowelpins.Supportcontrolhous-

wardtoreleaseoperatingshaftfork from

using,andlift outcontrolhousing(fig.77).

NORWEIGHTHOUSING.Usingfuel

boltswhichattachgovernorweighthous-

ver,supportingthehousingwhilelast

ndpullweighthousing awayfromblower


/ h t t p : / / w w w . h





w-speedSpringPlungerGap

artswithinthegovernorshouldwork

rts.Inspectthe governorcontrolhous-

rokenpartsand loosefits.Notethe

ghtshaftbearing(fig.77).Checkopera-

see thattheymovefreely.Theweights

eweightcarrier sufficientlyfreetofall

sitionbytheir ownweight.Movegovernor

heweightshaft.Notifyhigherauthority

repair orreplacement.

norhasbeen removedasanassembly,

ngmustbeseparatedfromthe governor

allationontheengine(subpar.b (1)and

ssemblingthegovernorisas follows:

VERNORWEIGHTHOUSING.Ifgasket

hthousinghasbeen damaged,removeold


/ h t t p : / / w w w . h





ystems

ndshellackanewgasketin place.Before

toblowerendplatecover,firstposition

ngthe weighthousinginverticalposition

egovernorweightshaftto throwoutward,

hrustbearingtodropdowninto proper

econtrolhousing.Carefullylowerweight

outshiftingthepositionof thethrustbear-

ng.Enterthe splinedendofthegover-

upperrotorshaft.Installthe sixgovernor

bolts,withlockwashers,finger-tightin

VERNORCONTROLHOUSING.Ifgover-

hthousinggaskethas beendamaged,re-

fhousing,andshellacknewgasketto

rcontrolhousing.Lookthroughopening

gtomakesurethat bearingandthrust

ser, andthatgovernoroperatingshaft

aceoftheforkin contactwiththegover-

ringwasher(fig.77), andisnotentered

dbearing.Pullcontrolhousingintoposi-

housing.Install governorweighthousing

fourboltsand lockwashers,andtighten

eighthousingtoblowerendplatecover

h(KM-KMO-326A).Usinganewgas-

elbowtogovernorcontrolhousingwithtwo

dtightenbolts.Install twoclampbolts,

ttachbreathertubetooilcoolerhousing,

int ofengineoiloverthe partsinthetop

usingtoprovideinitial lubrication.Adjust

).

Beforemakinganyadjustmentson

ctors(par.74c) andpositioninjector

hreeadjustmentsonthe governorare

ginepowerasfollows:high-speedspring

rsettinggovernorlinkage;low-speedad-

gineidlingspeed;bufferspringscrew

-speedenginerollandstalling.

SETTING.Removethegovernorcon-

.b(1) above).Disconnectthegovernor

r(fig.77). Starttheengineandregulate

finjectorcontroltubelever (fig.79).

ooverspeedtheengine.Keepthe

00and1,000revolutionsperminute,and

wso thatthegapbetweenthelow-speed

springplungeris 0.001to0.002inch


/ h t t p : / / w w w . h





Instructians

Low-speedSpringPlungerGap

maybemeasuredwitha0.0015-or

ertedbetweencapandplunger.Tighten

orecheckingthegap setting.Stopthe

vernorcontrollink.Installthecontrol

SPEED.Loosenlocknut,holdit,

bufferscrewuntili tprojects%inch

engineand runat1,000revolutionsper

Setthethrottlein idlingposition.The

pinlevershouldbein theidlingnotchin

gineruns unevenlyor"rolls"whenthor-

rnthebufferscrewinuntil engineruns

norhigh-speedspringcover.Loosengov-

ustingscrewlocknut.Thenturnthe

dtoobtainan averageidlingspeedof

minuteandtightenlocknut(fig.81).

essary,tobringtheidle rolltoa minimum

reaseidling speedmorethan20revo-

rningbufferscrewor itmaybeimpos-

ththethrottle.Tightenbufferscrew

gh-speedspringcover.Installrocker


/ h t t p : / / w w w . h





yitems

gineIdlingSpeed

WADJUSTMENT.Loosenthebuffer

turn bufferscrewoutuntilitprojects%

bufferscrewintobringthe engine

AUTION:Donotraisetheidlingspeed

revolutionsperminutewithbufferscrew

possibleto shutdowntheengine.

LERATOR.

eandacceleratoroperatethegovernor

stemofrods,levers,and linkage(fig.82).

blyconsistsofthethrottlelever,throttle

elock,andflexiblethrottlecontrolcable.

etherwiththeairheater fuelpumpsonthe

tofthe driver'sseat(fig.5).Thethrottle

ethrottleleverintothesystemat thejunc-

rislocatedonthefloor totherightand

ers(fig.8). Theacceleratorpedaliscon-


/ h t t p : / / w w w . h





eInstructions


/ h t t p : / / w w w . h





ystems


/ h t t p : / / w w w . h




Instructions

rthrougha cylinderwithrodends.Itis

gsandan adjustmentscrewwhichlimits

ationofthe throttleoraccelerator,refer

radjustmentofthe throttlecontrolor

aragraphgbelow.

trol.Removethrottlecontrolhous-

acket(fig.82).Disconnectthrottlecon-

er,andremoveclevisand jamnutfrom

ehousingjamnut andpullthrottlecon-

sing.Togainaccessto clutch,remove

k-outcablesatclutchequalizerassembly,

ectionsoffighting compartmentfloor.

utcontrolcablesfromleversatclutchequal-

cableclipsonfinaldrivehousingand hull

collectorringbox,andremovecablesfrom

ngjamnutsatequalizer bracket,andpull

oughthebracket.Removeclipswhich

alhousing.Pullclutchlock-outcablesfor-

movethrottlecontrolassemblywithclutch

ontrol.Insertthrottlecontrolcable

ablehousingjamnut, clevisjamnut,and

tothrottleleverarm.Installthrottle con-

cket(fig.82). Installclipswhichsecure

ng.Attachapieceofstrongcordto clutch

embackthroughtunneltoclutchequal-

ughbracket,installcablehousingjam

oclutchlock-outcontrollevers(fig.9).

ablestohull floorandfinaldrivehousing.

e(subpar.1(1)and(2) below).Adjust

bles(par.130b).

r.Removescrews,lockwashers,and

plateimmediatelyaboveaccelerator(fig.

omacceleratorbolt.Unscrewthebolt

omsupportbracket.

or.Positionacceleratorinsupport

curetheboltwith anewpieceofwire.

ylindertoacceleratorarm.Hookthetwo

elerator.Adjustacceleratorstopscrewif

low).Installsectionofdriver'ssubfloor

ndAcceleratorLinkage(fig.83).To

atorlinkage,firstremovedriver'sseatto

pace(par.219).Removethedriver'sseat


/ h t t p : / / w w w . h




Sysiems

ovecapscrews,lockwashers,and

verbracketfromthehullfloor.Disconnect

ableyoke,throttlecontrolcylinder,and

erleverturnbucklefromthejunction

ctionleverbracketbackinpositiontoaid

ottlecableandjunctionlever.

LECONTROLCABLEATTHROTTLE

leverupinto"No-FuEL"positionand

trolfromthesupportbracket.Adjust

eclevissothatthreadedend ofcableex-

ds theclevis.Tightenthelocknut.Adjust

ntrolcableconduitin cablemounting

Vi-inchclearancebetweenendofcable

levisjamnut(fig.83). Returnthrottleto

ck.Installthrottlecontrolsupportbracket.

TLECONTROLCABLETOJUNCTION

erupin "No-FuEL"positionandlock.

elevercableclevis andadjustclevisso

projectsthreefull threadsinsidetheclevis.

Connecttheclevisto lowerslotin

83).Adjustlocknutswhichhold cable

etsocableclevispincontactsrearend of

slot projectsVsinchbeyondrearedgeof

ONTROLLEVER.Disconnectgovernor

dfromleftenginegovernorcontrollever.

ontrolleverin idlingnotchingovernor

onofrightenginegovernorcontrollever.

ermustbeparallelwiththe frontedgeof

cessarytocorrectlypositiongovernor

onnectgovernorcontrolleverrod,discon-

loosenleverclampbolt(fig.82). Then

ghtenbolt,andattachspring.Movegov-

o-FuEL"positionandattachgovernorcon-

controllever.Checkpositionofleverand

wingthepreviousprocedureforleveron

stablerodsohole inyokelinesupwith

ver,andtightenlocknuts onlyfinger-tight.

otterpin.Locknutswillbetightened

beensynchronized(par.79).

ERSHAFTARMPOSITIONS.Inthe

connectthejunctionleverturnbucklefrom

eve(fig.83).Rotatethrottle control

rksfreelyanddoesnotbindon clutchcon-

thofjunctionlever turnbuckleto9%,5


/ h t t p : / / w w w . h




e(nstructians


/ h t t p : / / w w w . h





ystems

nterofclevispinholes.Connectthethrottle

einjunctionlever(fig.83). Connect

einthethrottleidler shaftarm.Pushthe

tly towardthefrontofthevehicleto take

elinkage.Disconnectthelongthrottle

endofthe throttleidlershaft.Movethe

nyslackinthegovernorcontrollinkage.

odclevis sopinwillslip freelyintohole

tarm.Tightenclevisjamnutsandreplace

PEDALANDLINKAGE.Adjustacceler-

ere isVi-inchclearancebetweenbottomof

ewanddriver'ssubfloorplate.Tighten

tacceleratorcylinderrodsoclevispin has

orethanVs-inchclearanceatfrontendof

tionlever(fig.83).Tightenclevisjam

racketcapscrewsandtightensecurely.

esynchronizedaccordingtoprocedurein

dure.Allpointsoffrictioninthe

kageshouldbelubricatedwithengineoil.

tes(par. 220).Installdriver'sseat(par.

GINESPEEDS.

mustoperateatthe samespeedand

movementwhentheclutchesaredisen-

ull powerunderloadasaunit when

espeedsofthe engineswhenclutchesare

an100revolutionsperminutewhileoper-

volutionsperminute,enginespeedsmustbe

othefollowingprocedure:

hometers.Runtheenginesandwarm

clutchesandnotetachometerreadings.

00revolutionsperminutefromeachother,

etachometersisoutofcalibrationand

rControlLeverLink.Withengines

clutcheslockedout,setand lockthehand

esat1,500revolutionsper minute.Loosen

djustablegovernorcontrollinkontheleft

ntheturnbuckleto increaseordecrease

easrequiredtobalanceit within100revo-

peedoftherightengine.Tightenthe lock

eterreadings.


/ h t t p : / / w w w . h





eInstructions

ntakesystemforeachengineconsists

intakehousing,blower,andairbox.Air,

nersandintakehousing bytheblower,is

theair boxwhichsurroundsthelower

mtheair boxitis forcedintothecylin-

euncoveredbythepistons(fig.84).Two

edin handholeopeningsontheinner

attheair intheair boxforquickstarting

vy-dutyoilbathaircleaners(fig.85),

ousingof eachengine,filtertheincoming

wnintothesideof thecleanerbythe

of theoilbath,wherea majorportionof

esofdustaretrapped.Theair thenpasses

edmetalwoolofthe filteringelementand

e blower.Twotypesofaircleanersdif-

onareused.TheACtype isidentified

vresin thehousingandtheDonaldson

Allsixair cleanersonpowerunitmust

velmustbemaintainedat,but not

g.85). Ifthehousingsare filledtoa

,theexcessoil willbedrawnintothe

cylindersin vaporform.Thiswillresult

causeseriousdamage.Cleantheele-

eneverinspectionshowsthatanyappre-

ccumulatedtorestrictthe airflow.

CLEANERHOUSINGS.Removeall

elow).Inspectbodyand housingsfor

OnDonaldsontype,removesnap

e.Emptyhousingandscrapeouttrapped

eanwithclothsoakedinDieselfuel oil.

eof housingandbetweenupperandlower

replacesealstoinsureairtight connections.

baffleandsnapring.Pour engineoil

asonalgradeinto housingtolevelmark

rder(par.34). CAUTION:Donotfill

Placebodyonhousing.Installair clean-


/ h t t p : / / w w w . h





ngAirIntoCylinders

LEMENTS.Removeallsixair clean-

tiallyfillasuitableand cleancontainer

ON:Donotuse gasolineorother

ersonDiesel engines.Submergeair

oil andslushitup anddowntothor-

movebodyfromcleaningbath,shaketo

eloilas possible,andstanduprightto

y.Elementsmustbe dryandmustnot

catingoilbeforeinstallationof airclean-

y,fillhousing (step(1)above)and

Installair cleaners(subpar.<1below).

T.Whenthefilteringelementis

reservoir(par.44k),it mustberaised.

-inchspacertothebottomof thecleaner


/ h t t p : / / w w w . h





eInstrucfions

E

— Disassembled

eelementthe sameamountastheoil

st describedinparagraph44k(2).

deaircleanerstopreventdirt drop-

whenaircleanersareremoved.Begin-

ron eachside,unscrewwingstudattop

mediatelycoverairintakehousingports

tape.CAUTION:Donotuse ragsor

otectivecoveringfromairintakehous-

eron airintakehousing,beingcareful

cleaneror getdirtintoair intakehous-

yto makepositivesealwithhousing.

dcentercleaner.


/ h t t p : / / w w w . h





sing— Removed

S.

eairintake housingisattachedto

outside ofeachengine.Airisdrawn

ersandinto theairintakehousingby

anda gasketbetweentheairintake

gpreventforeignmaterialfromentering

necompartmentdoorandsideplate.

d.Removeaircleaners(par.81c).

orofairintakeand blowerhousing.Re-

ndlockwasherswhichattachair intake

ir intake,screen,andgasketassembly.

thacleancloth,taped attheedgesto

dust.

oweropeningcovercloth.Witha

offrotorandotherexposedparts.Posi-

emblyandairintakehousing.CAUTION:

ehousingisclean.Installlockwashers

nsecurely.Installair cleaners(par.


/ h t t p : / / w w w . h





Instructions

erisbolted tothesideof eachengine

shaftdrivenbyan auxiliarygearinthe

wersuppliesthe cylinderswithfreshair,

stionandwhichalsopurgesthe cylinders

the blowerfromtheaircleanersthrough

ohollow,helical-shapedrotors,eachwith

der pressureintotheairbox whichsur-

irentersthe cylinderthroughportsor

(fig.84).Notifyhigherauthoritywhen

er.

s alargechamberwithinthecylinder

ntirelengthonbothsides ofthecylinders.

ifoldtodistributetheincomingairto the

fromtheblower,throughtheportsin the

he cylinderliners.Theinteriorofthe

eanedthroughthehandholeopeningson

ock.Eachopeningis providedwitha

retwohandholesintheouterside and

chengine(fig.89).Refercleaningof

y.

ains.Twoair boxdrainsarepro-

sedrainsmustbe keptopenatalltimes.

ermittedtoaccumulateintheair box,

inders,causingtheenginetorun away

tartenginesandrunat 1,000revolutions

eamof aircanbefelt ateachendof

s(fig.89),thedrains areopen.Ifonlya

allis felt,thedrainiscloggedand must

uthority.

Removedraintubesfromelbows

ylinderblock.Usewire,andcompressed

obstructionfromdraintubeand elbow.

besin block,andstartenginetotest for

xdrains.Iftest showsairpassagesare

mustbe cleaned.Reportthiscondition

eairheaters aresmallDieselfueloil

tricignition.Twoairheatersare installed

ndholdopeningsoftheairboxon theinner

weather,theairheatersareusedto


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/ h t t p : / / w w w . h





eInstructions


/ h t t p : / / w w w . h





/ h t t p : / / w w w . h





Inductions

othe cylinderstoprovidequickerstarting.

sare operated,atomizedDieselfueloil

sintotheair boxandignitedbytheelec-

meheatsthe airintheair boxbefore

moveenginecompartmentfloorplates

capscrewswithlockwasherswhichat-

dyand removecover.Removecapscrew

whichholdsair heatertubetoairheater

ertubeatelbow.Removeknurlednut

ethewirefromelectrode.Disconnectair

ion.Removecapscrew,coppergasket,

chairheaterbodyto cylinderblockand

emovecorkgasketandfeltsealfrom

rmaintenanceincludesremovingcar-

adjustingsparkgap.

OMAIRHEATERS.Removeinsulator

minsulator,andremoveinsulatorfromair

ctrodeandlockwasherfromsideofburner

zlefrominsidetheburneropening,and

ter,andspring(fig.88).Scrapecarbon

eanerbodyand fromwithintheburner

Diesel fueloil,wipedry,andblow out

geswithcompressedair.Installpartsas

<Ibelow.

ZZLE.Unscrewvortexplugfrom

Washplugand nozzleinDieselfueloil.

wireor drilltocleanorificesin nozzle

sorcopperwire.Damagetogroovesin

geinsizeofnozzlehole willpreventproper

epartscleanandblowout withcom-

texpluginnozzlewith moderateforce.

rheaterbody.Installnozzle withwasher

ARKGAP(fig.87).Cleaninsulator

tforcracksinporcelainorburnedelectrode.

overelectrodeendofinsulatorand insert

.Install nutoverinsulatorinair heater

atorand screwintobodytocompress

trodeorreplaceifburned.Installlock

readedholenearburneropening,and

ybendingscrewelectrode(notthe one

hdrillorrodwill passfreelythroughthe


/ h t t p : / / w w w . h





LA)ENGINE

ATERCOILS

URESIGNALSWITCHES

ls

GNITIONBEFOREINSTALLATION.Con-

sulator.Holdairheater incontactwith

ound connection.Turnon12-voltmaster

witch,andobservespark.A continuous

weentheignitionelectrodes.Ifsparkis

acetheairheatercoilfor theheaterbeing

aterswitchanddisconnecthigh-tension

rheaterup betweentheenginesand

ter.Openair heaterpumpshut-offvalve.

off.Operateairheaterpumpandobserve

houldbeforcefulandcone-shaped.Aweak

pactionorapluggedtube. Closetheair

isconnectfueltube.CAUTION:Donot

eriousfiremayresult.


/ h t t p : / / w w w . h





Instructions

(figs. 88and89).Replacefeltseal

e ofthesealwithgeneralpurposegrease

dairheateropening.Inspectcorkgasket

Coatonesideofgasketwith liquidjoint

dplaceitinposition oninnersideofair

sitionairheateragainstcylinderblockso

asket.Installflatwasherandnewcopper

sertin airheaterbody,andscrewit tightly

ctfuellinetoelbow.Attachthelead

nknurlednut. Installfuellineclip and

atercoverandscrews,makingsurefuel

eredinrubbergrommet,andfeltseal is

coverscrews.Connectfuellineat tee

mp.Installengine compartmentfloor

S.

fengineair heatersareelectrically

itches,locatedinthelowerrightcornerof

tlyabovethestarterbuttons(fig. 12).

lledbyarrow-markedknobs,andhavetwo

"Turningaswitchoncausesthecurrent

atercoilstotheair heaterelectrode.

nstrumentpanel(par.186).Discon-

ofswitchbeingremovedandtag foridenti-

crewandunscrewknob.Removenut

elandlift outswitch.

wswitchininstrumentpanelandin-

knobontoswitch;besureswitchis inthe

bwitharrowpointingto "OFF"oninstru-

tscrew;beforetighteningset screw,be

rancebetweenendofknoband panel.

ovibrator-type,high-tensionignition

el ontheenginecompartmentsideofthe

oilsfor eachengine.Thesecoilssupply

airheatersoneachengine.Whenanair

the currentpassingthroughthecoilspro-

d.NOTE:Theair heatercoilsusedwith

omountedontheenginebulkhead,butare

rimaryfuel filtersandlubricatingoilfilters


/ h t t p : / / w w w . h





oltmasterswitch.Removeairheater

high-tensionwire,theprimarylead,and

oil (fig.90).Removethetwoclampbolts

ebracket.

heatercoils, reversetheremoval

bparagraphItabove.Aftercoilshavebeen

asterswitchandtest operation;thenin-

haustsystemofeachengineconsists

haustmanifoldelbow,exhausttube,the

er(fig.91).Theexhausttubeand elbow

foldtothemufflersupport,whichisat-

e lowerrearhullplate.A mufflerforeach

endof themufflersupport.

ehasitsindividualexhaustsystem,

stmanifoldboltedtothe cylinderhead,

skets,andanexhausttubewhichconnects

mufflersupport.Theexhaustof eachen-

ratemufflerboltedto thesupportbracket.

oveenginecompartmentfloorplates

systemsofboth engines(par.118l>).

hichattachengineoildipstickbracketto

onnectwaterby-passtubeoneachengine

oveattachingscrewsfrombothupper

wsandgaskets.Removescrewswhichat-

olerhousingand removegaskets.Loosen

asstubetofan endofcylinderblock.From

dnutonengineoildipstick tubesatcylin-

sofboth tubesdownbetweenengines

ercovers.Unscrewfourcapscrewswhich

anifold.Frombelow,loosennutonfirst

dwithratchethandle,10-inchextension,

ackoffthenutflush withendofstud.From

ngmanifoldstudnutsandbackoffnuts

ds.Liftmanifoldfromcylinderhead.

sfromallstudsexceptNo.3 andNo.5

.Removethegaskets.


/ h t t p : / / w w w . h





Instructions

OWS

em

ycleangasketsurfacesoncylinder

dsurfaces.Installnewmanifoldgaskets

TE:Donotslotboltholes inthegaskets.

ndnutswhichwereremoved,andscrew

dsofstuds.Carefullypositionmanifold

sketsarenotdamaged.Tightennuts

tsuniformly.Slideanewgasketintoposi-

dendof exhaustmanifold(fig.93).Install

ashers,andtightenevenly.Connectwater

asketsifnecessary.Installclipswhichhold

mbelow,positionoildipsticktubes to

uts.Installdip stickbrackettothermostat

s,screws,andunionsare tight.Install

racketscrews.Fillenginecoolingsystems

compartmentfloorplates(par.216 c).

ustmanifoldgasketscanbereplaced

vingtheexhaustmanifoldasexplainedin

ANIFOLDGASKETS.Removeengine

(par.216b).Draincoolingsystemsof

Removeengineoil dipstickbracket

oveknurlednutfromdipsticktubesand


/ h t t p : / / w w w . h





oldRemoved

twaterby-passtubeoneachenginebyun-

waterby-passtube upperelbow.Re-

bothupperelbows,andremoveelbows

soneachenginewhichattachlowerelbow

emovegaskets.Loosenclipswhichattach

ndof cylinderblock.Pushupperendsof

enginesuntiltheyrest onairheatercovers.

ttachelbowtomanifoldonwhichthe

.Frombelow,loosennuton firststudat

tchethandle,10-inchextension,andVs-


/ h t t p : / / w w w . h





Instructions

austManifoldGasket

utflushwithend ofstud.Fromabove,

inchsockettoloosensixremainingmani-

nutsuntilflushwithends ofstuds.Separate

ad.Usescrewdrivertoremovetheexhaust

NIFOLDGASKETS.Thoroughlyclean

nderheadsurfaces.Slotthestudholesin

gasketsatthebottomof thestudholesso

ownoverthestuds (fig.93).Carefully

nthe studs.Pushmanifoldintoplace

tightenstudnuts evenlytocompressgas-

rocedureinsubparagraphcabovetore-


/ h t t p : / / w w w . h





HAUSTDEFLECTOR

ORT

erandSupport

wexhaustmanifoldelbowgasketand

.Installengineoildip sticks(subpar.c

artmentfloorplates(par.216c).

rticalexhausttubescarrytheexhaust

hroughopeningsinthe mufflersupportto

pperends ofthetubesfit intotheex-

ndsfitinto openingsinthemufflersup-

srequiredin eitherelbowsormuffler

atorandfanshroud(par.119b).Re-

ee shortboltswhichattachelbowtoend

ovetheelbowgasket.Workelbowupand

xtremoveexhausttubeby workingit

ufflersupportbracket.

etsurfacesonelbowandendofexhaust

ofexhausttubein mufflersupport

nintopositionoverendofexhausttube.

yfrommanifoldandcarefullyinsertnew

chingscrewswithlockwashersand

etuniformly.Installfanshroudandradiator

connectionsaretightandenginecooling


/ h t t p : / / w w w . h





e/nstructions

T

ctorLowered

NDSUPPORTS.

omufflers,oneforeachengine,silence

omufflersareboltedto themufflersup-

support isboltedtothe lowerrearhull

ufflerSupport(fig.94). Remove

aise theexhaustdeflectorandsecurein

rpins.Disconnectthetwoanchorrods

ectortohull.Nextremovethefourshort

emufflerguardandremovetheboltswhich

e hull.Liftoffthemufflerguard.Either

edfromthemufflersupportbyremoving

sherswhichattachmuffler.Ifthemuffler

itisnotnecessarytoremoveexhausttubes.

afetynuts whichattachmufflersupport

dworkmufflersupportoffexhaustpipes.

MufflerSupport.Themufflersor

edbyreversingremovalprocedure(subpar.

eflectorandanchortohullafterinstalling


/ h t t p : / / w w w . h





onSystom

stdeflectorconsistsoftwometalgrilles

er edgeoftheupperrear hullplate.Its

ddiffusetheengineexhauststopreventthe

Wheninposition,thedeflectoris heldin

fig.95). Whenitisdesiredto gainaccess

upport,removeanchorrod pins,lower

outof theway(fig.94).Secureinraised

orrodlockingpinsthrough bosseswelded

ovedeflectoranchorrodlockingpins

movecotterpinfromeachdeflectorhinge

driveoutbothhinge pins.Lowerdeflector

onesand otherdebrisorforeignmatter

odgedinthegrilles.

tioneachdeflectorgrille,andmate

nges.Install hingepinswithcotterpin

eedges ofdeflector.Installandspread

ectorintowardlowerrearhull plateand

CATIONSYSTEM

.

systemforeachengineofthe wet

umpassembly,oil strainer,oilcooler

sagewaysandtubesthroughwhichtheoil

epointsinthe enginewhichrequirelubri-

riedin thecrankcaseasintheconven-

engine.Theengineoilpan isdivided

ps,bybaffles.Oilfrom thefrontandrear

engerpumpsintothe centerwellorsump.

roughtheengine.Ahigheroil levelis

mpthanin theothertwo,butwhenthe

chesthispredeterminedlevel,itoverflows

mps.Therefore,asufficientquantityof

esandunderalloperatingconditionsto

e engine.Returningoilflowsintothe

thecentersump intheengineoil pan

hroughanoilstrainerand thenanoil

dontheoutsideofthe engine.Fromthe

inoil galleryintheengineblock,through


/ h t t p : / / w w w . h




eInstructions

inelubricationSystem— Schematic

mainbearings,andthroughdrilledholesin

ectingrodbearings.Thepistonpin bush-

cated.Oilissprayedout oftheupper

sandonto theundersidesofthe piston

tons.Oilisforcedtothe bearingsoneach

lanceshaft,andto intermediatecamshaft

ings,andclevispinbearings.Surplusoil

pan.Externaloillinesdeliveroil to

sandto fandrivegears.Oildraininginto

umpsatfrontand rear,andisdrawnout

psandreturnedto thecentersumpfor

fig.97).Theengineventilatingsys-

hervaporsfromthecrankcase,timinggear


/ h t t p : / / w w w . h




onSystem

TS

VERNOR

ROLHOUSING

ntilatingSystem


/ h t t p : / / w w w . h




Instructions

over,BreatherBaffle,andBreatherPad

mberattopofcylinderhead.The conden-

sformsludge.In coldweatherthesludge

circulationoftheoil. Othervaporscon-

acids,whichareharmfultoengineparts.

edin thecrankcasebyslightleakageof

elowerpistonrings. Fromthecrank-

ss throughthegeartrainhousinginto and

amber,andareremovedatthe governor

breatherelbowon topoftherockerarm

olhousingisventedbya tubewhich

ompartmentfloor.Thebreatherelbow

connectstoanippleonthe governorcon-

wthe housing.

ENGINELUBRICATIONSYSTEM.

ehasa separatelubricationsystem,the

erepeatedforeachengine.Referto

orviscosityandquantityof enginelubri-

refillinganenginesystem.

veengineoilpandrainplug cover

arounddrainplugclean.Positionclean

pacityunderdrain.Removedrainplug

mpletelydrained,wipedrainplug clean


/ h t t p : / / w w w . h




tionSystem

atingOilCoolerandStrainer

sketifnecessary.Tightentheplug se-

verandnewgasketif necessary.

Whenasampleof theenginelubri-

undueamountof sludgeispresent,the

andcleaned.Removetheengineoilpan

n,using drycleaningsolventorDiesel

oilpan,usingnewgasket(par.100 b).

ndopenfillercapcoverand remove

ar. 34)intofillertube.Operateengine

perminute.Stopengineandcheckoil

. Ifoilleveldoes notreadto"FULL"

ecessary.Installfillercap;lowerand


/ h t t p : / / w w w . h





Instruction*

KCTRELIEFVALVE

ndOilCoolerAdapter— SectionalView

HER.

kerArmCoverBreatherHose

mpsoneachendofbreatherhose.

armcoverbreatherelbowandgovernor

veclampsfromhose.

clampsonrockerarmcoverbreather

kerarmcoverbreatherelbowandgover-

htenhoseclampssecurely.

kerArmCoverBreatherAssembly

atherhose.Removerockerarm

sandnutsfromthetwobolts whichat-

the rockerarmcover.Removecotter

rliftingknobsand pullknobsoutofcover.

ed,thebaffle,pad,twospacers,andplate,

thecover,willdropdown,andtheelbow

thetopofthecover.

obesure itiscleanandthe meshis

ged,cleanthoroughlyindrycleaning


/ h t t p : / / w w w . h





tionSystem

gasket,ifnecessary,andbreather

cover.Install twobolts;holdbolts,

etinposition,andturn coverover.Onthe

a spaceroneachbolt,thepad,and the

ntourofbaffleconformswithcurveof

allnutson bolts,andinsertandspread

roverandinstall thetwoliftingknobs

preadanew cotterpininliftingknob

veroncylinderhead.Install rocker

eoilpump assembly,locatedinthe

kcase,consistsofthreegear-typeoilpumps,

mpdriveshaft.Thepressurepumpsec-

oil fromthemainoilsumpi ntheengine

ghtheenginelubricationsystem.The

engingpumpswhichpumpoilout ofthe

earsumpsintothemainsump.

mpreplacementorrepairisrequired,

ner,mountedontheoil cooleradapter

rainscarbonparticlesand dirtoutofoil

hthe enginelubricatingsystem(fig.96).

deof thestrainerelement,afinemesh

eofthe elementflowsintotheoilcooler

necompartmentfloorplatebeneath

neris toberemoved(par.216b). Drain

lstrainer drainpluginoil cooleradapter

toinstalldrainplugafter draining.

tainerattaperedendofstrainerhousing,

eradapter,andremoveandcleanstrainer

elementcleaninDieselfueloil. Use

utwith cautiontoavoiddamagingwire

moilcooleradapterandinsideof hous-

inercleanin Dieselfueloil.Install

apterandtighten.

onditionoflargegasketinthe oil

dreplaceifnecessary.Enterthetubular

ole intheoilcooleradapterand push


/ h t t p : / / w w w . h





eInstructions


/ h t t p : / / w w w . h





onSystem

ble.Installnewgasketonretainerand

hehousingin oilcooleradapterand

etsare firmlycompressed.Filloilpan

gagerod. Startengineandinspectfor

mpartmentfloor.

0,and101).The oilcooleroneach

se.It coolsthehotengineoil whenair

atsthe coldoilduringenginewarm-up

reislow.Theoil flowsintothecooler

forcedthroughamultiple-platecooling

ytheengine coolant.

ingsystem(par.118l>).Remove

).Disconnectwaterinlettubefromcooler

e lowerflangeonthecoolerhousing.

oldtheflangeofthe waterby-passtube

rpumpinletseal clampattopofcooler,

p onelbow.Disconnectwaterpump

nd coolerhousing,andcarefullyremove

moveclipwhichholdswaterdrainvalve

drod.Unscrewdrainvalvewithnipple

enginesideof theoilcooleradapter,

opand oneatbottom,whicharescrewed

movesixcoolerhousingbolts,holding

ositionwhilethelasttwobolts arere-

tickstotheadapter,tap lightlywitha

ousingwithcaresotheoil coolerunit

dgasketsandcleanallsurfaces.Re-

l,slidingthe newsealuponwaterpump

edge.Cementnewgasketto oilcooler

coolerassemblyinthehousing.Cement

ngeofoil coolerassembly.Positionthe

apter andassemblebyreversingthere-

ATORANDRELIEFVALVES

rValve.Stabilizedlubricatingoil

hintheengineat allspeeds,regardlessof

e,bymeansoftheregulatorvalve.This

r flywheelendofthecylinderblockat

gallery.Thevalveconsistsofagasket,


/ h t t p : / / w w w . h





Instructions

RegulatorValve— Disassembled

,acompressionspring,aplugto retain

y.When oilpressureatthevalveex-

einch,the valveisliftedfromits seatand

engine galleryisbypassedtotheengine

nevertheengineoilpan isremoved,

sureregulatorvalvein drycleaning

nspectforscoremarks.Oilpassages

emust movefreelyinthevalvebody.


/ h t t p : / / w w w . h





onSystem

ReliefValve— Disassembled

necompartmentfloorplate(par.2161>)

00a).Removethetwovalvebodyto

andlockwashers.Strikelowerendof

ateit fromcylinderblock.Liftoffvalve

vevalvebody.Clampflangeofvalve

ug fromvalvebody.Removespringand

nenginelubricatingoiltooutsideof

vebody,withopenendof valvetoward

ning.Installspringinside ofvalve.Com-

g invalvebody.Tightentheplug.

tracesofoldgasketfromvalvebody

henewgasket.Positionvalvebodyon

capscrewsandlockwashers.Tightencap


/ h t t p : / / w w w . h





eInstruct

ve.Anoilpressurerelief (safety)

tedinthepressurepumpbody.When the

eeds100poundspersquareinch,the re-

sestheoil totheintakesideof thepump.

evertheoilpan isremoved,inspect

elief valveindrycleaningsolventor

coremarks.Oil passagesmustbeopen

efreely.

necompartmentfloorplate(par.2 16b)

00a).Removeplugandgasketfromeach

espringandplunger,or valve,fromvalve

ofpressurepump.Cleanandinspectas

hl>above.

valveor plunger,smallendfirst,in

tsideofpressurepump.Install thespring.

eachendofreliefvalveopeningand

eoilpan (par.100h)and enginecom-

16c).

moveenginecompartmentfloorplate

gineoilpan.Removeattachingcap

exceptthoseatcorners,fromengineoilpan.

ecornercapscrews.Loweroilpan and

icle.Wipecleanwithdrycleaningsolvent

ld engineoilpangasket.

asketandpositionoil pan.Support

allfourcornercapscrewsandlockwashers,

remainingcapscrewsandlockwashers.

atelytocompressgasketuniformly.Be

stalledandtightenedsecurely.Install

rplate(par.216c).Fillenginelubricating

ANDSENDINGUNIT.

eisprovidedwithanoil pressuregage

tpanel(fig.12) andanelectrically-oper-

donthe engine(fig.62).Thesendingunit

tachedtothe rearsideoftheflywheel

he blowerdriveshaftcover.Ahosecon-

heoilpump,anda wireinashieldedcon-

e oilpressuregage.

oveinstrumentpanel(pars.186b

omgageandtag forinstallationidentifi-


/ h t t p : / / w w w . h





onSystem

DRAINPLUGGASKET

gineOilPan— Removed

herandmountingbracket.Liftgageout

ate,usingcarenottodamagegasket.

tiongageininstrumentpanelface-

ecessary.Installmountingbracketand

estoproperterminals.Installinstrument

t.Turnoff24-hourmasterswitch.

ndopenconnector.Disconnectwirefrom

dingunitfromfittingattachedtobracket.

nit.Screwsendingunitonto fitting

ectwiretosendingunit.Closeconnector

screws.Turnon24-voltmasterswitch

WARNINGSIGNALANDSWITCH.

-type,lowoilpressurewarningsignal

corneroftheinstrumentpanel(fig. 12).

ionsasa high-watertemperaturewarning

warningsignal isoperatedbyaswitch

ketastheoil pressuregagesendingunit

memanner.

ryoutredlampcoverwith screw-

htlyandturntorelease.Withdraw

ewlampbyreversingremovalprocedure.

essing firmlyintoposition.

owprocedureinparagraph101d

raph101e


/ h t t p : / / w w w . h





Instructions

sesinsteadofsteeltubesare used

performingmaintenanceoperations,or

subjectto considerablevibration.Brazed

emorerigidinstallations.

nofOilTubes.Whenlooseningor

ttingsonendsoftubesor hoses,holdnipple,

ning.Usetight-fittingendwrenchesto

onconnections.Protectopenfittingsand

eswithtapetoprevententranceofdirt.

toprovideaccesstoother units.Remove

Beforeinstallation,makesurethreadsand

ndfreeofdirt particles.Springthetubes

eadssquarelyandthusavoidcross-thread-

ewhentighteningconnectionstoprevent

singthethreadsorconnections.

es.Replacealldamagedhosesascom-

mblies.Whenpossible,replacesteeltubing

mblies.Whennecessarytomakereplace-

stmeasuredevelopedlengthoftube tobe

sufficientlengthtoallowfor bends.Use

ewtubingto avoidkinking.Inmany

withalarger radiusthanusedinforming

eis fitted,dressbothendsoffsquarely

inside andoutsideoftube.Placecor-

orpackingglandsoneachendof tube.The

ytobeflared.Usefuel lineflaringtool

CATIONSYSTEM

thedry sumppowerunithasaninde-

bricationsystem(fig.105).Inthistypeof

eadofbeing inthecrankcaseasinthe wet

separateoil supplytanks.Thesetanks

compartmentadjacenttothelowerfuel

rawnfromthe lubricationoilsupply

l strainerandthenanoil cooler,which

eof theengine.Fromthecooler,oilis

ery intheengineblock,throughpassage-

arings,andthrough drilledholesinthe

ngrodbearings.Thepistonpinbushings


/ h t t p : / / w w w . h





onSystem

•

gineLubricationSystem— Schematic

ed.Oilissprayedoutof upperendsof

ersidesofpistonheads tohelpcoolthe

bearingsoneachendofthe camshaft

ntermediatecamshaftbearings,rockerarm

arings.Surplusoildrains downintothe

ndisdirectedto lubricatethegeartrain,

dthe governorweightassembly.Surplus

Externaloillines deliveroiltoblower

an drivegear.Oildrainingintothe oil

t frontandrear,andis drawnoutbythe

returnedtothesupplytank forrecircula-

Theengineventilatingsystemremoves

mthecrankcase,timinggearcase,and

condensationofwatervaporhelpsform

esludgefreezesand canblockthecircula-

rscondenseandformcorrosiveacids,

eparts.A lowpressureismaintainedin

kageofairfrom theairboxpastthe lower

kcasetheairand vaporspassthrough

andthroughthevalvecompartmentand

orcontrolhousing,whichisventedby a

eenginecompartmentfloor.


/ h t t p : / / w w w . h





Instructions

PENGINELUBRICATIONSYSTEM.

inehasaseparatelubricationsystem,

atedwhendrainingboth enginelubricating

onorder(par.34)for viscosityandquan-

to beusedforeachsystem.

vefourboltsandlockwasherswhich

nelubricatingoil pandrainholecover

ginecompartmentfloorplates,andremove

Removethetwoboltswhichattachthe

drainholecoverplate (fig.234)tothe

erplateandgasket.Placesuitablecon-

enings.Removedrainplugfrom oiltank,

sfrom eachendofengineoilpan.After

lugscleanandinstall,usingnewgasketsas

s.Installdrainhole cover-plates,using

ndtightenbolts.

lockpinandraisefillercovermarked

trearof turretontopof hull.Unscrew

nalgradeengineoilinto fillerpipe.

tesat400 to450revolutionsperminute.

evel.Gageon instrumentpanelmust

tionvehicleshaveadipstickinfiller

checktheaccuracyoftheinstrumentpanel

ean,andinserti ntubeasfar aspossible.

stshow thatoillevelis upto"FULL"

dscrewfillercapon tightly.Lowerthe

edpositionwith lockpin.

GOILTANKS.

ldedsteellubricatingoiltanksare

eofvehicleadjacenttothe lowerfuelsup-

mpartment.Alongfiller pipeoneach

peningontopofhull. Thetanksare

suringtape(dip stick)fittedinatube

ccessiblewhenfillercapisremoved.

sedto checktheaccuracyortosupple-

rate.-oiltankgages.Embossedfigureson

thetank.Thetight-fittingfillercapis

equalpressureispreventedbyusinga

icatingoiltank.This hoseconnectsthe

singonits respectiveengine.

ginecompartmentcoverplatesasa unit

enginecompartmentsplashpanel(par.

mpartmentfloorplateunderenginenext


/ h t t p : / / w w w . h





onSystim

nginelubricatingOilFilterElement

r.2161>).Frombelowthevehicle,re-

rainplugcoverand removethedrain

ertankhasdrained,installthedrain

bolts,oneat eachend,whichattachtank

supplyandreturnhosesfromtankby

chelbowstotank.Disconnectleadwire

d.Fromaboveinenginecompartment,

ank(par.120b).Disconnectleadwires

geunitand emergencystopsolenoid,

twhichattachescliponconduitto spon-

nduitwith disconnectedwiresoutofway

e.Unscrewfittingonventhoseat top

outofway.Loosenlowerhoseclampat

lerpipeclampbolt.Takeout twobolts

mptosponsoncoverplate.Liftout clamp

moveboltsfromupperend oflubricat-

outstraps.Turn fueltankselectorvalve

ank,disconnectshortfuelsupplytube

vetotee connection,andthetwotubes

theright andleftprimaryfuelfilters.

Whenremovinglefttank,itis necessary

onlythetubefromthe teeconnectionto

emoveair intakehousingfromblower


/ h t t p : / / w w w . h





eInstructions

htupandthentilt towardengineto

eandfuelreturn tubeastankis removed

t.

kby reversingtheremovalproce-

ckof tankattopandspacerbeneaththe

ed.Usenewgasketsonbothoil tank

dpositiongasketswithraisededgesagainst

catingoil.

escription,removal,cleaning,and

raph97.

cription,removal,cleaning,andinstal-

8.

atingoilfilters,oneforeachengine,

of thefilterpanel(fig.44).Filter ele-

heneverengineoilis changedtohelp

cement.Unscrewretainernutand

Liftoutspringandelement.Placesuit-

tocatchoil andremovedrainplug.Wipe

withclothsoakedinDieselfueloil. In-

Installnewelementandpositionthe

oldcovergasketandinstallnew gasket.

ainernutgasket.Screwretainernuton

and inspectforleaks.

enenginecompartmentdoorsand

.Placesuitablecontainerunderfilter to

plug.Disconnectinlethosefromelbow

).Removeelbowfromoilfiltershell.In-

Removefourboltsandwasherswhich

Layfilter onengine.Disconnectoutlet

ofshell, andremoveelbowfromfilter.

Screwoutletelbowtightly intofilter

osition.Attachoutlethose andtighten.

terpanel,installthefourattachingbolts

bolts.Installandtighten inletelbowin

ellon sideneartop.Attachinlethose

ndexamineforleaks.Stop theengines.

okinplace.- Closeandboltenginecom-

SANDSENDINGUNIT(Replace-

101.


/ h t t p : / / w w w . h





onSystem

WARNINGSIGNALANDSWITCH

ragraph102.

45).A pressedsteeloilpanwith

r,is gasket-mountedandboltedtothe

.Ateachsideoftheoil pan,aninletand

rthesupply andreturn(inletandoutlet)

nks intheenginecompartment.Each

rontandrear drainplug.

necompartmentfloorplate(par.

lubricatingoilsystems(par.105b).

thosesfromeachengineoil pan(fig.45),

enginecompartmentnearoiltanks.Re-

ndwashers,exceptatcorners.Support

capscrews.Loweroilpan andremove

pepancleanwithdrycleaningsolventor

old oilpangasket.Removeandclean

(fig.45).

andoutletelbows(fig.42) toengine

NOTE:Makesurefrontand reardrain

din oilpan.Mountoilpan gasketand

gine.Supportoil panandinstallfour

nottighten.Install remainingcapscrews

capscrewsalternatelytocompressgas-

andoutlethosestocorrespondingelbows

mpartmentfloorplates(par.216c).

em(par.105c).

Y.

passembly,locatedinthebottomof

nsistsofthreegear-typeoilpumps,alldriven

aft.The pressurepumpsectionofthe

esupplytankand forcesitthroughthe

m.Theothertwopumpsare scavenging

of thetwosumpsinthe oilpanand

k.Thecenterpumpdrawsoilout ofthe

passembly.Theendpump scavenges

nd oftheoilpan.

higherauthority.

LATORANDRELIEFVALVES.

formationandmaintenanceprocedure.


/ h t t p : / / w w w . h





eInstructions

(Replacement).Removethree

samesideaslubricatingoiltank from

ved.Disconnectwirefromgage.Remove

stall newlubricatingoiltankgageby

cedure.Usenewgasketongage.Install

andtightenscrewsevenlyandsecurely

ectionforgage.

aragraph103forinformationand

enginesare liquid-cooled.Each

ater pump,fan,radiator,andanauxiliary

stemsarecompletelyindependent(fig.

mperatureiscontrolledbythermostats

waterthroughthe radiator(fig.112).

eislow,thethermostatscutoffthe flowof

andbypassit backtothewaterpumpfor

enginecoolingsystem.Thetwoenginefans

ginecompartmentdoors(gratings)and

ment,andforceitoutthroughthe radiators

dedwith ashroudwhichdirectstheair

ingefficiency.Thewaterexpansiontanks

tment,oneconnectedtoeachcoolingsys-

nalwatercapacityandextraspaceforthe

atedandexpands.Eachcoolingsystem

expansiontank(fig.107).

pedwithpressuretype fillercaps.

tedvalvedesignedtohold pressureupto

persquareinch.

GSYSTEM.

pinandraisehingedcovermarked

eonreardeckat rearofturret(fig.58).

fillercap one-quarterturnonlytoallow

gradually.Thiswill preventbeingscalded

terpressureis released,unscrewcapand

rainer.Ifwaterlevelis lowandnot

penairbleedervalveonthermostathous-


/ h t t p : / / w w w . h





/ h t t p : / / w w w . h





Instructions

xiliarywatertankwithwater,oranti-

sary,totopoffilleropening.Thefiller tube

ktoprovide necessaryairspaceforexpan-

eandscrewfiller capontightly;then

pluginenginecompartmentfloor

alve.Ifthereis antifreezeinthecooling

ontainers.Openfillercapcoverandre-

fillercap.Raiseenginecompartment

plashpanel (fig.233).Openwaterdrain

eder valveonthermostathousing(fig.

trefilled immediately,attachatag

OLINGSYSTEM"tothesteering

stallall drainplugs.Removefiller

alveon thermostathousingtoridthesys-

waterintosystemuntilit isapproximate-

ngineatidlingspeed.Addcleaningcom-

containerof cleanertoevery4gallonsof

Thencompletefillingthesystemwith

ixthewaterandcleaningcompound

esystem.Donot spillthesolutionon

ortionsofthevehicle.Nevermixcleaning

esolutionsorwithinhibitors.

inpositionundertheexpansion

cttheoverflow.Usetheoverflowtomain-

mifnecessary.Checklevelbyopeningair

athousing(fig.107).NOTE:Donotfill

nengineatfast idlingspeeduntilthe

atureof180° F,butnotover200° F.Do

ecksystemlevelfrequently.

thasrunfor 30minutesatatem-

F,butnotover200° F;thendrainthesys-

bove).


,andpourwaterinto systemuntilitis

enruntheengineat idlingspeed.Add

proportionofonecontainerofneutralizer

ngsystemcapacity;thenfillsystemwith


/ h t t p : / / w w w . h





ast5minutesat normaloperating

eengine.

etely(subpar.1>above).


stemuntil itisapproximatelyhalffull;

peedandfillsystemcompletely.

oolantisheatedtonormaloperating

ely(subpar.habove).Repeatflush-

n waterisclear.

theflushingoperation,makecertain

owedto coolagain.Installalldrain

ndpourwaterinto systemuntilitis

enruntheengineat idlingspeedandfill

dercockinradiatorinletconnection.Stop

ntiresystemforleaks.This isimportant

tionuncoversleakswhichalreadyexist

dwithrust orcorrosion.

newaterdrainvalve.If system

ut14ouncesof rustinhibitorineach

eachwatertankto thetopwithapproxi-

.Donot removethestrainer.Ifanti-

ubparagraphibelow.Closeairbleeder

ng.Inspectcoolingsystemforleaks.Lower

shpanelandhookinplace.Closeandbolt

rs.Seethatfillercapgasketisserviceable;

werand lockfillercapcover.Inspect

ks.Inspectenginedrain valvesforleaks.

ngof theironinthe coolingsystems

erblocksandcylinderheads,a soluble

beused.When servicingthevehicle

nearlyfull withcleanwater.Addcor-

inproportionofonecontainerofcom-

coolingsystemcapacity.Thencomplete

eloftheair bleedervalveonthethermo-

ngforwinter,fillthesystemabout

ater.Addsufficientantifreezecompound

owestanticipatedtemperature(par.

systemisnearlyfull;thenrun the

ingtemperatureisreached.Addsufficient

theproperlevel.


/ h t t p : / / w w w . h





InHructions


/ h t t p : / / w w w . h





NSHROUDS.

iators,mountedattherearof engine

ss-flowtype(fig.108).Waterfromthe

ectionontheside tanknexttotheother

hroughtheradiator,andoutthebottom

etankinto theenginelubricatingoil

nonradiatorsidetankis anairventtube

Afan shroudattachedtoeachradiator

nthroughtheradiatortoincreasecooling

renginecompartmentcoverplate.Re-

ntfloorplate.Drainthecoolingsystem

er hoseconnectionclampsonradiator,

waterexpansiontank.Removeengineto

pansiontanktoradiatortube. Frombe-

nections,andremoveradiatoroutlettube

ontank.Supportradiatorso brackets

twoboltsoneachofthe fourbrackets

adiator.Onoutsideofhull,removeupper

tbolts,andremovethetwoouter brackets

moveboltswhichattachupperandlower

adiatorcentersupport,andremove

tings.Pullradiatorslightlyrearwardto

nceforbottomoutlet,andattacharopeor

109.Attachahoisttosling andcarefully

ment.CAUTION:Donotpryonradiator.

efanshrouds,removeboltsonouterside

tremoveboltswhichattachinnerside of

upport.Pullshroudinto spaceoccupied

liftshroudout.

wasremoved,installit byrevers-

spectallradiatorbracketshockmountings

notserviceable.Makesureradiatorcool-

clean.Installradiator byreversingre-

alltubes,clamps,andhoseandreplace

tbewipedclean.Slide hosewithclamps

endoftube.Installtubesand hosecon-

econnectionandturnhoseclampssothat

Tightenallhoseclampssecurely.Before

fillcoolingsystem(par.118 g),andex-

eaks.Completetheassemblybyreversing

valprocedure.


/ h t t p : / / w w w . h





Instructions

adiator

TANK.

pansiontankinthecoolingsystemof

tionalwatercapacityandalsoexpansion

eated(fig.107).The filleropeningfor

hetop oftheexpansiontank.Anyairin

ghthe largetubeleadingtothe water

uredintothewaterexpansiontankflows

eradiatoroutlettubeto fillthecooling

oesnotcirculatewaterthroughthewater

necompartmentcoverplateanddoor


/ h t t p : / / w w w . h





terPump,UsingWrench(41-W-1495-100)

eremovedandopenoppositedoor.Re-

ntsplashpanel(par.214<1).Drainthe

).Loosentwoclampsoneachconnection

nsiontank.Removethefourbolts,twoat

nktosponsoncoverplate.Supporttankas

dlift outtank.

econnectionsandclamps,andreplace

expansiontankbyreversingremovalpro-

mpssoclampscrewsareaccessiblewith

htenhoseconnections.Closeenginedrain

veandfillcoolingsystem.Closeair

forleaksbeforeinstallingenginecompart-

plate,anddoor.

eisequippedwithacentrifugalwater

ulateswaterthroughthecylinderblock,


/ h t t p : / / w w w . h





eInstructJons


/ h t t p : / / w w w . h





doilcooler.Thepumpis mountedonthe

ng directlyunderthegovernorweight

ouplingontheendof blowerlowerrotor

son aprelubricateddoublerowball

quireadditionallubrication.

ecompartmentdoors.Raiseandlock

shpanel.Drainenginecoolingsystem

leanerandcoveropeningsin airinlet

mparoundsealbetweenwaterpumpcover

deseal uponelbow.Disconnectthe

ooseningthe ~\,;-inch,ferrulednutat

movetwoboltswhichattachwaterpump

nderblock.Usingfuelpumpwrench

ethreeboltswhichattachwaterpumpto

.110).Turnthe pumpone-quarterturn

ehicle;thenslide thepumpassembly

andlift itoutofthe vehicle.Coveroil

ION:Wheninstallingnewpump,besure

upbeforestartingthe ~\t-,-inchferrulednut.

ngeonwaterpumpoutletandinstall

seclampandnewinlet sealontopump

pandinstallbyreversingremovalpro-

angeevenly.Positionhoseclampon

willbeaccessibleforfuturetightening

amp.Fillenginecoolingsystem(par.

nspectallcoolingsystemconnectionsfor

inecompartmentsplashpanel,andclose

entdoors.

eisequippedwitha5-blade,gear-

eairoutthroughtheradiator cores.The

bearingswithlubricationprovidedby

hetwofansturn inoppositedirections

topofeachbalanceweightcover,and

ecompartmentdoors,andraiseandlock

shpanel.Removesixnutsandlockwash-

achfan bladeassemblytodrivehub.Do

ithdrawthemfar enoughtoclearfanand

movecapscrew,lockwasher,andflat

Movefanassemblytowardradiatorand

mfan shroud.

ntingfaceoffandrivehubplate clean.


/ h t t p : / / w w w . h





Instructions

-PASSTUBEELBOW

RBLEEDERTHERMOSTATSWATERMANIFOLD

ermostats

eightcoverwithhollowsidesofblades

ked"RadiatorSide"forcorrectinstalla-

d,itturns inthedirectionindicatedby

theleadingedgesof bladesmustbefarther

ngedges.Aftermakingsure fanwillturn

it throughopeninginshroudandassem-

rocedure.

manifoldoneachengineisattached

catedbetweentherockerarmcoverand

112).Waterentersthemanifoldfromsix

derhead.Fromthemanifoldit passes

usingintotheradiator.Thewater tem-

switchareinstalledin themanifoldatthe

compartmentdoors,andraiseandlock

shpanel.Removeenginecompartmentfloor


/ h t t p : / / w w w . h





gsystem(par.118b).Removeengineoil

vethermostathousingandthermostat(par.

stmanifold(par.89b). Removewater

andswitch.Remove12nutsandlock

nifoldtocylinderhead,andliftmanifoldoff.

askets.Ifmanifoldistobereplaced,un-

ngunitandswitchbushing.

etsurfaceoncylinderheadandwater

newgasketsonstuds.Ifreducerbushing

hardeninggasketcementonthreadsand

manifoldwithoutexcessivepressureto

ld.Positionwatermanifoldonstudsand

and nuts.Firstdrawallnuts down

omthecentertowardendsof manifolds,

mpressure.Install theexhaustmanifold

tatandhousing (par.124d).Installoil

watertemperaturesendingunitand

olingsystemsandinspectallconnections

lationbyreversingtheremainderofthe

ostatsarelocatedinhousingsinthe

watermanifold(fig.112). Thethermostat

esas themanifoldwateroutlet(fig.113).

enginetemperaturebycontrollingthecir-

heradiator.Whenenginewatertempera-

hethermostatscompletelyblockanycircu-

.Thewaterthenbypassesthe radiator,

htheengineandoil cooler.Therefore,

ter hastobeheated,andthe engine

gtemperaturemuchmorequickly.After

eexceeds158° F,thethermostatsstartopen-

to circulatethroughtheradiator.When

esapproximately185° F,thethermostats

offcirculationthroughthe by-passtube,

tedthroughtheradiator.Incoldweather,

sedandheatedwaterisbeing circulated

wateralso actsasanoilwarmer.By

y,morepositivecoldweatherenginelubri-

ereasons forusingtwothermostats,

engine,isto minimizeresistancetothe

ostatsarefullyopened.


shpanel.Partiallydraincoolingsystemto


/ h t t p : / / w w w . h




Instructions

OVER

D

HousingandWaterManifold— Disassembled


/ h t t p : / / w w w . h




ethermostats.Loosenfourhoseclamps

Slide enginewateroutlethoseupon

oftube toonesidetoclear thermostat

swhichattachwaterby-passtubeelbow

bowgasketisloose,spring elbowaway

emovegasket.Removefourboltsand

thenliftout thethermostat.

erthermostatshavebeenremoved,

yphons(bellows)andvalves.Unless

mostatmustbereplaced.

eangasketsurfacesonmanifoldand

thermostatseatsinmanifoldclean.Place

withvalvesup.Usenewgasket,if necessary,

singandoill evelgagebracket.Tighten

odrawhousing downevenly,andthen

passtube elbow,usinganewgasketif

tsevenly.Installenginetoradiatortube

s.Seethat airbleedervalveisopen,fill

oseairbleedervalve.Inspectwatercon-

enginecompartmentsplashpaneland

oltenginecompartmentdoors.

.

ervalveis installedineachthermo-

eof ventingairoutofthe enginewater

emisbeingfilled(fig.114).


allydraincoolingsystemuntilwaterlevel

ng.Placewrenchonhexagonofvalvebody

ewairbleedervalveassemblyoutof ther-

lvebodywitha wrenchandopen

handwheelcounterclockwiseuntilit

lveintothermostathousingandtighten.

valveandinspectforleaks.Complete

mainderofremovalprocedure.

EGAGECONTROLSWITCH

ginetemperaturegageismountedin

tothe fuelgage(fig.12).It iscontrolled

abelled"TEMP"attheleft ofthemain

mperatureofeither rightorleftengine


/ h t t p : / / w w w . h




Instructions


/ h t t p : / / w w w . h





chtogglelever to"R"or"L."Asending

ofeachwatermanifold.

atureCage.Removeinstrumentpanel

sfromgageterminals.Tagwires for

Removefiberwasherandmounting

ceplate,usingcarenotto damagewasher.

reGage.Installnewrubberwasher

positiongagein faceplate.Installgage

erwasher.Connectwirestoproperter-

ationtags.Installinstrumentpanelface-

ge.

atureCageControlSwitch.Remove

.186b andd).Disconnectwiresfrom

eraturegagecontrolswitch.Unscrewhex-

sswitchtopaneland liftoutswitch.

reCageControlSwitch.Position

controlswitchininstrumentpanel.Install

htensecurely.Connectwirestoswitch

theinstrumentpanel(pars. 186cande).

urnoff24-voltmasterswitch.Re-

itanddisconnectwirefromterminal.Un-

gunitfromendof watermanifold.

ewsendingunit intoendofwater

terminal.Installcaponsendingunit.

tchandtest operationofunit.

RATUREWARNINGSIGNALAND

othe enginetemperaturegage,there

ertemperaturewarningsignalin thelower

ntpanel.It isoperatedbyacontrol

newatermanifoldnearthe watertem-

t.Thissignalalso functionsasenginelow

warningsignallampsocketis notre-

in-bladedscrewdriver,pryoutred

n turnandpullout.

mpinsocket.Pushin andturnuntil

e.Snap theredjewelintoplace.

.Turnoffthe24-voltmasterswitch.

panddisconnectwire.Unscrewcontrol

nifold.


/ h t t p : / / w w w . h





Instruction*

crewcontrolswitchintowatermani-

hterminal.Installthecap.Turn on

testoperationofunit.

DCLUTCHES

IT.

owerdevelopedbythetwoengines

gearunitthroughadry diskclutchat

edrivenplatesofthetwoclutchesare

hcarryingahelical gearwhichdrivesthe

ntedontheengine drivenshaft.Each

dthedrivengearhas 62teeth.Withthis

tatesat 1.37timesenginespeed.

etransfergearunit,first performthe

MPARTMENTFLOORPLATES.Traverse

ates,andfoldbackrightandcenterhinged

partment.

LERSHAFT.Refertoparagraph137e.

utof theway.

RHOUSING.Placesuitablecontainer

ybeneathdrainelbowat leftfrontof

movethedrainplugfromthe elbowand

oil.Installdrainplugafter draining.

TCOVERS,NUTS,ANDDRIVENSHAFT

driveshaftcoversandgaskets.Remove

spectionholeco\«r,swingcoveraside,and

elteethto preventwheelfromturning.

ningnutfromouterendof drivenshaft,

wrench.Removedrivenshaftbearing

drivenshaftflangestraightoffbyhand.

.Holdflywheelfromturning,andremove

CONTROLTURNBUCKLES.Backoffjam

kles.Removethelocknutfromclutch

removethegudgeon.Raisecontrollever

oughtopermitremovalofcotterand

eyokesatlowerendsof controllevers.

mclutchreleaseleveryokes.NOTE://

thhandholeandcover,removecoverand


/ h t t p : / / w w w . h




tches


/ h t t p : / / w w w . h




Instructions

disconnectturnbucklesfromreleaselevers.

ichattachgearhousingtoclutchhousing.

ntappedholesprovidedingearhousing

niformlytoforcegear housingfromclutch

metaldrift andtapendsofdrive shafts

tof clutchhousingasgearhousingis

tfrombetweenthetwohousings.

arsandshaftswithDiesel fueloil,and

urnshaftsandgears byhand,andnote

thsnugfit. Ifthereareanyindications

gs,notifyhigherauthority.Examinethe

enedsplines. Notewhethergearteeth

deeplyscratched.Ifanyofthesecondi-

thority.

EARUNIT.Lubricatedrivenshaft

pound.Cleantheboltingflangesurfaces

earhousings,spread lightcoatingof

pound(52-C-3122)onthesesurfaces,and

otransfer gearhousingflange.Setgear

hhousing,withthetwoenginedriveshafts

arhousing.Enginedriven shaftwillpilot

ngat thesametime.Useabar infly-

ecrankshaftandmeshtransfergears.

placewith 24capscrewsandlock

evenlytocompressgasketuniformly.

NUTS,COVERS,ANDDRIVENSHAFT

omturningandinstallretainingnutsto

ewgasketsif necessaryandinstalldrive

edrivenshaftflangeonouter endofdriven

terinsideoil seal.Installflangeretaining

hten.

NTROLTURNBUCKLES.Connectclutch

chreleaselevers,andinstallconnecting

dsofturnbucklestoclutchcontrollevers.

onandlocknut.

HOUSING.Filltransfergearhousing

5.

SHAFT.Refertoparagraph138.

MPARTMENTFLOORPLATES.Foldthe

e.


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chts

EW

OD;

celeratorPedalInstalled

LINKAGE.

pedalisconnectedbyarod toalever

tchcontrolcrossshaftunderthedriver's

e clutchcrossshaftrodattachestoa

ftheclutchcontrolcrossshaftandto the

ssembledonthetwoclutchcontrollevers.

na clutchlock-outcontrolbracketat-

wardof therearuniversaljoint.Thetwo

edtotheclutchreleaseleversat thebottom


/ h t t p : / / w w w . h





Instructions

er

oturnbuckles.Aclutchboosterspring

tableforpedalpressure,isattachedto one

toabracketmountedonthe hullfloor.

driver'sseat (par.219b).Remove

220 b).Unhookthepedalreturnspring

isconnectrodfromthe clutchpedal.

ecurespedaltopedalshaft,andpull shaft

ftoutflatwasherand pedal.Loosen

stopscrewfrom pedal.

pedalstopscrewandjamnut.Posi-

shaftbracket,installflatwasheronshaft,

acketandpedal.Tightenpedal clamp

lrodtopedal,andinstallpedal return

stroke(subpar.gbelow).Checkclutch


/ h t t p : / / w w w . h





tcho

UTCABLES

zer— PropellerShaftRemoved

adjustif necessary(subpar.ibelow).In-

dinstall driver'sseat.

ver'sseatandfloor plate.Unhook

Removepinstodisconnectclutchpedal

aft lever.'Removetherod.

onclutchpedalrodonclutchpedal,

rpin.Checkpedalstrokeand adjustif

w).Checkboosteradjustmentandadjust

necessary(subpar.ibelow).

pellershaft(par.137).Remove

es.Depressclutchpedaland blockitin

entwocapscrewswhichlockbooster

upportbody;then loosenjamnutand

orelievetensiononspring seats.Remove

daltoreturnto normalposition.Remove

etainingscrewsandliftout supportbody.

ndclutchcrossshaftrodat thecrossshaft.

hsecurecrossshaftsupportstohullfloor

embly.


/ h t t p : / / w w w . h





eInstructions

ualizerFromControlLevers

oncrossshaftassemblyonhullfloor.

urecrossshaftsupportsto hullfloor.Con-

hcrossshaftrod tocrossshaft.Depress

fullforwardposition.Installbooster

ompressboosterspringinavise and

sitionwithstrongwire.Install springseats

emblybetweenclutchboosterleverand

).Turn adjustingscrewinuntilscrew

upportbodyandspring issupported.Re-

ockandpermitpedaltoreturn tonormal

ntofthrottlerodsandadjustif necessary

everpositionand adjustbooster(sub-

hpedalfreetravelandadjust ifneces-

alldriver'sfloor plate;installpropeller

driver's seat.

pellershaft(par.137).Remove


/ h t t p : / / w w w . h




tches

KET

OD

zer— Removed

atbothendsofclutch crossshaftrod.

easeyokefromequalizerandliftrod from

nrodonclutch crossshaftrightlever

.Adjustcross shaftrodtomeasure51%

holeinyokeatequalizerfront link,and

amineboosterleversettingandadjust if

w).Checkequalizeradjustment(subpar.j

aft(par.138).

trolLeverAssembly.

opellershaft(par.137).Remove

,spreadequalizer,and removefromclutch

clutchcrossshaft rodfromequalizer(sub-

ctclutch lock-outcablesfromlock-out

ngjamnuts,and removecablesfrom


/ h t t p : / / w w w . h




Instructions


/ h t t p : / / w w w . h




ches

tfromcontrollevergudgeonandremove

119).Raise controlleversforclearance

controlturnbuckles.Removecapscrews

ttachlock-outbracketstohullfloor,and

lutchcontrollevers(fig.120).

onclutchlock-outbracketstohull

swithlockwashers.Connectclutchcon-

evers,andinstallgudgeonand locknut.

esinbracketsandconnectcablestolock-

ronclutchcontrollevers,and connect

ualizer.Adjustthe clutchpedalfree

justclutchcrossshaftrod (subpar.i

ustment.Disconnecttheclutchpedal

er.Loosenjam nutandsetclutchpedal

geof pedalpadis9%inchesfrom driver's

onnectclutchpedalrod tocrossshaft

osterforcorrectleversetting(subpar.h

ents.Checkpedalstrokeadjustment

bpar.gabove).Disconnectclutchpedal

er (fig.116).Turnclutchboosterlever

eroflever pinholetohull floorplateis

leverin thispositionandadjustlength

ectwithclutchcrossshaft leftlever.In-

ghtenjamnut.NOTE:// clutchbooster

theabovemeasurement,theboosterwill

utchpedalwillfail toreturntofully re-

lutchboosterforpedalpressure,loosen

gscrewin(clockwise),ifpedalpressure

erclockwise),ifpressureistoo slight.

mnut.CAUTION:Ifadjustingscrewis

dal willnotreturnfromdepressedposition.

ent.Noadjustmentoftheclutch

yexcepttocorrectfor wearafterlong

t.Disconnectclutchcrossshaftrodfrom

andpullequalizerrearwarduntil equalizer

of slotsinclutchcontrollevers.Adjust

aftrodso thatrearofpinhole inyoke

olein equalizerfrontlink(fig.122).

keandfront linksoheadofpin isattop,

enrod yokejamnut.Adjust-theequal-

andEqualizerAdjustment.Loosen

othturnbuckles(fig.122).NOTE:Jam


/ h t t p : / / w w w . h





e/nstrucfions

ualizer


/ h t t p : / / w w w . h





hu

buckleshaveleft-handthreads.Turnleft

yenoughso thatleftclutchlock-out

sily withoutholdingclutchpedaldown.

travel,lengthentheturnbucklesbyturning

tly18flats.Holdturnbucklewithwrench,

nd tightenjamnutsonboth ends.Hold

wn,pushleft clutchlock-outbuttonin,

xt,whilethe clutchpedalisbeingheld

slackoutofclutchlinkage,adjustright

cebetweenhookedendsofequalizerrear

meonboth sidesofequalizer.Clearance

ergage ora6-inchscale(fig.122). Hold

preventitfromturning,andtighten jam

utchpedalallthewaydown,pullout

letclutchpedalup.Seethat gearshift

opellershaftbyhandandif itdoesnot

son eachturnbuckle,lengtheneachturn-

ndtightenjamnuts.Propellershaftmust

lutchEngagement.Beforemak-

rytocheckthetachometersforaccuracy

eedsaresynchronized.

Startenginesandoperateat1,000to

uteuntilenginetemperaturegagesread

k-outbuttonsarein andpropellershaft

otachometerreadings.Iftheyvarymore

inute,onetachometerorthe otherisout

eplaced.

HRONIZATION.Withbothclutchlock-

engines at1,500to1,800revolutionsper

eterreadings,andif theyvarymorethan

e,adjustthegovernorcontrolleversfor

bove),totestclutches(step(3) below).

ENGAGEMENTOFCLUTCHES.Operate

in thirdgear,engagingtheclutchesin

atchingbothtachometerswhiletheclutches

ageisadjustedcorrectly,bothtachom-

er.If onetachometerhandconsistently

,inspectthe entireclutchlinkageincluding

eit movesfreelyandthatthereis no

ses.Ifthelinkageisfree,checkthe

122).Aftercheckingtheadjustment,if

eengagingactionoftheclutchesstill

47.


/ h t t p : / / w w w . h





Instructions

tchlock-outbuttons(fig.9)onthe

dtolockthe twoclutchesoutofengage-

ablestothelock-outcontrolleversmounted

rolbracket.Whenlock-outbuttonsare

lock-outshaftsareina horizontalposition

ewiththetraveloftheclutchcontrollevers.

sheddown,the lowerendsofcontrol

lingoutthelock-outbuttonsrotatesthe

nsotheyblockthereturn ofthecontrol

the disengagedposition.CAUTION:

ydownwhen operatingclutchlock-outs.

toclutchlock-outcontrolbracket,see

tcablejamnuts,onbothsides oflock-out

mustbetightand lock-outbuttonpushed

ejamnutsoneachsideof cablebracket

ontrolleversothatflat onshaftisin hori-

mnuts.Limitedadditionaladjustment,

byadjustinglock-outcablerod-endjam

clutchpedalis helddown,theflatson

visiblethroughopeningsinSidesof bracket.

e.Foraccesstoclutchcontrolbrack-

. Removejamnutandlockwasheron

earof swivelblock.Unscrewandremove

lockwasheronrear sideoflock-outcable

leandrodendout ofswivelblockand

mcablesatthrottlecontrolrodguideand

lutchcrossshaft.Removeclipfrom

eeringbrakecover.Removeclipfrom

ontrol.Backoffjam nutwhichsecures

using.Pullcablesintodriver's compart-

the throttlecontrol.

ble.Afterinsertingcontrolcable

trol,threadcablethroughlockwasher

thesupport.Tightenthenut.Place

oor.Installtheclipswhichattachcables

nd tobrakecover.Alsoinstallclipat

ndon hullflooratrear ofclutchcontrol

nut andlockwasheroncableandfitting,

cableretaining bracketonclutchlock-out

ondlargelockwasherandnutonrearside

onesmallnut withlockwasheroncable

dinswivelblock.Screwothersmallnut

d andtightenbothnuts.Adjustcontrol


/ h t t p : / / w w w . h





tchm

utchReleaseBearinglubricationFitting

ubricateclutchlock-outmovingparts

tionofclutchlock-outsonboth engines.

eisequippedwithaseparateclutch

ktypewithdiaphragmpressurespring

pedalis depressed,theclutchrelease

plateawayfromthe drivendisk,and

mthedrivingmechanism.Withtheclutch

inengagementbythepressureplateand

hescanbe lockedoutofengagement

singtheclutchpedaland pullingoutthe

k-outbutton(fig.9).


/ h t t p : / / w w w . h





eInstrucrions

ARING

utchHousingto

ews







sfergearunitasoutlinedinparagraph

sfromeachclutchhousinginspectionhole

ricatingfittingfromendofflexible hose

peplugsfromfaceof clutchhousing

enings,removefourcapscrewswhich

ywheelhousing.Remove22capscrews

eandinsert4 intappedholesprovided

niformlyto forceclutchhousingfrom

housingstraightoutto releasebearing

yokes.Removeclutchhousingfromfight-

ve12capscrewswhichholdclutchto

utchassemblystraightout,andremove

eenclutchplateandflywheel.


/ h t t p : / / w w w . h





ch,,

utchHousingFromFlywheelHousing

eshifteryokebushingsontheclutch

thesepartshavewornflat, loosennuts

bearing surfaceswithyokes.Inspectthe

ywheelandclutchpressureplate.Ifthese

dlyscored,notifyhigherauthorityforrepair

rts.

chassemblynexttodriven disk,and

throughclutchreleasebearingsleeveand

allendoftoolis insertedintopilotbearing

otateclutchassemblysothat holesfor

coveralinewithtappedholesin flywheel.

ockwashersbut donottightenuntilafter

himsthroughflywheelinspectionopen-

thescrews,andtightenthescrewsuni-

cordtothefittingsof thereleasebearing

utchhousingassemblyinplaceso that

eveguideswillenterthetwo sleeves.Pull

ebearingsleevesuntilbushingsforshifter

dbeneaththeguides.Guideshifter yokes

utchhousingupagainstflywheelhousing

ubricatinghosefittingthroughcenter


/ h t t p : / / w w w . h





Instructions

G

BLY

Disk,UsingPilot(41-P-402-200)

tioncoverandattachfittingtohose.In-

kwashers,andscrews.Install22capscrews

housing,anddrawthemup tightly.In-

e plugopeningsandinstallthe plugs.

t (par.128d).

tch.MakeproperentryonW.D.,

WOandMajorUnitAssemblyReplace-

K.

drivendisk(fig.128)has friction

eofa steeldiskSplinesinthe hubofthe

isein correspondingsplinesontheengine

ountedatthedisk hub,protectthe

dgrease.Thedrivendisk providesfor

erandpositivenonslippingdrive when

ransfergearunit(par.128b). Re-


/ h t t p : / / w w w . h





h«


/ h t t p : / / w w w . h





eInstructtons

ISSION

AINGREARTUBE

emovedFromFlywheel

y(par.131c).Liftout thedrivendisk

el.

eclutchdrivendiskfacingsforwear.

hediskat thefacings.Iftheover-all

ess than0.370inch,theshimsbetween

wheelshouldberemovedbeforeinstalling

over-allthicknessofthefacingsis less

eclutchdrivendisk.Examinethesplines

k.Ifthey arewornsufficientlytoallow

weentheshaftandhub,replacethedriven

enedsothatthediskdoes notslidefreely

sk ornotifyhigherauthority.

chdrivendiskin theflywheel,with

erfacingthe flywheel.Installtheclutch

allthe transfergearunit(par.128d).


/ h t t p : / / w w w . h





tchis

VECOVER

GLUG

VENUT

utchReleaseBearinglockNut,

680)

EARING.

releasebearingismountedinthe

eveandcoverattachedtothehubof the

129).Theball thrustbearingtakesthe

utchpedalisdepressed,andpullsthe

ngoutwardto movethepressureplate

eclutch.

dureinparagraph128btoremove

aragraph131ctoremoveclutchhousing.

gsleevefromturningandremovethe six

hesleevetothesleevecover.Pull the

over.Bendtangon lockwasheroutof

utbyturningitoff thepressurespring

rench(41-W-865-680).Slidebearing

rtsinDiesel fueloil.Inspectrelease

orwearandinstall newbushingsasrequired.

eforwear.Tryclutchreleaseshaftfor

erauthorityifbearingsareunserviceable.

gforwear.Packbearingwithgeneral

pply initiallubrication.


/ h t t p : / / w w w . h




nXrucfioni

ronpressurespringhub.Install bear-

mspring.Usenewlock washerandplace

ginslotin hubandteethpointingaway

tenhub nut,usingbearinglocknut

-680)toalineoneoftheslotsin thenut

elockwasherwhenthenut istightened

otinnut. Placenewgasketoncover,

verwithsix capscrews.Applygeneral

ghhosefitting untilsleeveandcoverare

par.131e). Installtransfergearunit

ING.

pilotbearinginthe centerofthe

ofenginedriveshaft.This ballbearing

kfedthroughadrilledpassagein the

dureinparagraph132btoremove

nabearingremoveronflywheelandpull

l.

einflywheel.Ifborehas beenen-

oritytoreplaceflywheel.Cleanbearingin

ingfor wearandreplacebearingif

.Inspectclutchpilotbearingwickinend

eitis saturatedwithoilandprojects

ofenginedriveshaft

gsquarelyintoflywheelbore,with

eel,bytappinglightlyonouterrace.Using

nysimilar tubularobjectwhichwillcon-

vebearingin untilitis flushwithouter

ebearingwithengineoil.Followpro-

and installclutchdrivendisk.

NIVERSALJOINTS

haft,equippedwithauniversaljoint

smitsthe drivingforcefromthetransfer

on.Thefrontuniversaljoint sleeveyoke

sontothesplines onthefrontendof

iningprovidesfor anyvariationindis-

ergearcaseandtransmission.Theuniversal


/ h t t p : / / w w w . h




no/Joints


/ h t t p : / / w w w . h





Instructions

edlerollerbearings whichmustbelubri-

sareinstalledandat regularlubrication

oint.Seethatclutchlock-outsare

eutral.Raisedoorinfightingcompart-

saljoint.Takeout fourboltsandremove

Examineinsideofcoverforgrease thrown

argequantityofgreasehas beenthrown

ointoilseals leak,andthepropellershaft

s aresatisfactory,tryturningpropeller

dand movingitupanddown.If there

ent,thebearingsarewornandthe propeller

earingsare notworn,tightentheuni-

seeiftheyareloose.Pull clutchlock-out

byhandandinspectweld aroundpro-

erearuniversaljoint(par.34). Install

ndlowerthe doorinfightingcompartment

ointandPropellerShaft.Lock

transmissionintogear.Take outbolts

ljointcoverwithinspectionplatein place.

ndifthereis anyquantityofgrease,it

ntbearingoilseals leak,andthepropeller

placed.Ifsealsdo notleak,tryturning

dworkit upanddown.Watchformove-

dyokes(fig.130)whichindicatesbearings

shaft mustbereplaced.Alsocheckfor

e(slip hub).Ifthereis noappreciable

ljointflangeboltsto makesuretheyare

onintoneutral.Rotatepropellershaft

n propellershafttube.Lubricateuni-

nstallfrontuniversaljointcover.

Housing.Toprovideadditional

ssistantdriver'sseat(par.219b)and place

keoutboltswhichattachfrontuniversal

dtopropellershafthousing,andlift cover

tmentreardoor,removeboltswhichat-

ver,andlift coverout.Raisedoorsin

orandclearstowagespacestoprovideaccess

entercover.Releaseandlowertheescape

boltswhichattachpropellershafthous-


/ h t t p : / / w w w . h





a/Joini.

ontUniversalJointFromPropellerShaft

cover.Removeboltswhichattachpro-

rcovertoright andleftsideplates.Raise

plates,andpull coverforwardintoas-

entandoutthroughescapedoor.

rsalJoint.Lockoutbothclutches.

cap(fig.130).Unscrewnutsonfront

emovebolts.Pulluniversaljoint backon

onto thepropellershafthousingstrap.

salJoint.Unscrewnutsonrearuni-

ovebolts.Pulluniversaljoint forward

enshaftand lowerthepropellershaft.


/ h t t p : / / w w w . h





nslructions

ropellerShaftforRemoval

fromVehicle.Withonemanat

ofpropellershaft,raiseshaftupand over

pellershafthousing,andplaceit onhull

ntoff splinesonendofshaft (fig.131).

ssistantdriver'sdoor,andopenandlatch

pellershaft towardrightfrontcorner

being pulledforward(fig.132).This

intto cleartheinnerrearcornerof

eloweredthroughescapedoor onto


/ h t t p : / / w w w . h





Instructions

mrear withthenutson universaljoint

ts.Lubricaterearuniversaljoint

lJoint.Wipeuniversaljointflange

nshaftclean.Positiontheuniversaljoint

mthe frontwithnutsonuniversaljoint

Lubricatefrontuniversaljointandsleeve

using.Completetheassemblyby

ftheremovalprocedure(par.137).

PULLEY.

tordrivebeltpulleyis adouble-

ntheinput endofthetransmissiondrive

rilled inthepulley,andit isheldin

eonthetransmissioninputshaft andfront

euniversaljoint flangebolts.

eneratorgroundwire.Removeright

tshields.Removeboltsfrom frontuni-

propellershaftfrontuniversaljointto

n generatorbelttensionadjustingpin.

offadjustingpinuntilbeltscanbe removed

pulley.Pullgeneratorpulleyoff trans-

neratordrivebeltpulleyontransmis-

eratordrivebelts. Connectpropeller

Adjustgeneratordrivebelttension (par.

vebelt shields.Connectgenerator

TIAL,ANDFINALDRIVE

WERTRAIN.

owertrain includesthetransmission,

dthefinaldrivesandsprockets.These

embledin,alarge1-piececastingcalledthe

hisboltedtothehull andformsthefront

l driveunits,includingthedrive

dasseparateassemblieswiththepower

canalsobe adjustedandbrakeshoe

thepowertraininthe vehicle.


/ h t t p : / / w w w . h





ndfinalDrlve


/ h t t p : / / w w w . h





nslructions

ICATIONSYSTEM.

hetransmission,differential,andfinal

ngle lubricationsystem.Anoilpump

bythe transmissioninputshaft,drawsoil

entialhousingandforcesitthroughlinesto

ecompartmentbulkheadandbackintothe

oillubricatesthetransmissiongearsand

tothesump inthedifferentialhousing.A

onnectioninthereturnlinefromthe oil

nggearandpinion.Thesameoil also

gearsandbearings.Thesteeringbrake

whichabsorbsmuchof theheatgenerated

intainedin thefinaldrivehousing

nforthefinaldrive gearsandbearings.

orecheckingtheoillevelinthe power

rivensufficientlytowarmup theoiland

vel groundfor5minutesto permitoilto

el canbecheckedaccurately.Tocheck

oveoillevelindicator(filler cap)onright

thenusea cleanclothtowipeoffmeasur-

p.Insertmeasuringrodinfiller opening

ening.Donotscrewoncap.Lift measur-

evelagainstmarkonrod.Oil mustbe

ainlevelat "FULL"mark.Screwoil

SYSTEM.Iflubricatingoil istobe

donlyafter vehiclehasbeendrivensuffi-

mtheoil.Providesuitablecontainerswith

catchthedrainedoil.Ifoil istobeused

clean.Also,alldrainplugs andsurround-

eanbefore removingplugs.Frombeneath

coverpluginhull floor.Usedrainplug

andremovedrainplugfromdifferential.

ousing,removedrainplugwithwrench

magneticdrainplugs,andinstalland

rainhas drained.Installandtighten

verpluginhull floor.

SYSTEM.Operatevehicleuntiloil

ast110° F.Drainthepowertrain(step

inwith19 U.S.gallonsofengineoil

otover 15milesperhour for3to5

goil.Removetransmissionoilfiller pipe

tinDieselfueloil, andputscreenbackin


/ h t t p : / / w w w . h





,andFinalDrive


/ h t t p : / / w w w . h





nstrudions

VALVE

T

LBOW

BOW

OLER

ND

R

RFUEL

ightingCompartmentSide

YSTEM.Unscrewoillevelindicator

algradeengineoil intotransmission

tremovescreen.//drainedoilis to

horoughlystrainedbeforeitis pouredinto

velindicator(fillercap)ontightly.Drive

rereachesatleast100° F.Stopvehicle

utesfor oiltosettle,andrecheckoillevel

.

oolerhasacoresimilar tothatofan

fig.136).Whenoiltemperatureislow,

coolerpermitsthe oiltobypassthecooler

eaderin thecoolerandthenbackto the


/ h t t p : / / w w w . h





,andFinalDrive

sconnectinletandoutlethosesfrom

tsandboltswhichattachoil coolerto

romfrontofcoolerandliftcooleroff

ulatingstrips.

eremovalproceduregiveninstep

ainoillevel.Operatetransmissionin

ks.

Tubes.

).Thetransmissionandthetrans-

ectedbypreformedsteeltubesand rubber

pportedonbracketsabovethepropeller

esetubesfromthe outletsideofthetrans-

ftheoilcooler.It thenpassesthroughthe

etransmission.

eturretasnecessary,andremovethe

ftcoverplates.Beforeremoving,tag

pectively"INLET"and"OUTLET."Dis-

urretcollectorringbox(par.193 b).Re-

hoilcoolertubestosupportbrackets.Re-

s.Loosenclampsanddisconnectrubber

smissionandon transmissionoilcooler.

wardsothat endsofrearhoseswill clear

port.Carefullyworktubesoutand remove

hosesonendsoftubes.Position

ft,workingthemintopositionbyreversing

scribedinstep(2)above.Holdtubes in

upportbracketsundertubes.Position

ndertubes.Tightencapscrewssecurely.

onfittingsontransmissionandon oil

pssecurely.Installturretcollectorring

nsmissionoillevel.Operatetransmis-

tforoilleaks.Installpropellershaftcover

ube.

xagonallocknutswhichattachoil

odifferentialcaseadapter.Liftoff the

removecapscrews,andliftoutadapter

onoiltubebetweendifferentialcase

Tightenhexagonallocknutssecurely.If

d,installnewgasketandadapter,and

y.Connectoiltubetoadapter.


/ h t t p : / / w w w . h





/nstructions

keleverandlinkageAdjustment

r.Acone-shaped,wire-meshstrainer

onfiller tube.

rcapand liftstraineroutoffiller

hlycleanitin Dieselfueloil.

strainerinfillertube.Besurei t

llercap.

ostatisinstalledina housinglocated

smissionoilcooler.In coldweather

remainscloseduntiltheoilis heatedtothe

enthethermostatisclosed,oilisbypassed

cktothetransmission.Whencorrectoper-

ed,thethermostatopensandtheoil flows

oilcoolerinlethose atinletfitting.

brassnutandwasherfromsideof thermo-

ermostat.


/ h t t p : / / w w w . h





-andfinalDrive

thermostatinhousingoninletside

ng,testthermostatinhot watertobesure

llnew gasketandbrassnut.Tighten

oilcoolerinlethoseat inletfitting.

NDLINKAGE.

d138).A pairofsteeringlevers

sareprovidedfor thedirectionalcontrol

e.Eachsteeringleveroperatesa brake

eddifferential.Pullingbackononesteer-

thatside,andthevehiclewill turnin

ovingtrack.Pullingbackonbothsteer-

willsloworstop bothtracks,depending

reeTravel.Steeringleverfreetravel

evehicleisoperated.Thefreetravel is

levers(fig.137),andisthe distancethe

ack(withlightpressureonly) fromfully

brakeshoesare felttobegincontact

herecommendedminimumfreetravelis

travelhasincreasedsufficientlytoallow

ulledbackoftheverticalpositionbefore

ms,aminorbrake adjustmentmustbemade

wsfromdriver'ssubfloor.Liftoutsub-

atorcontrolrodandacceleratorreturn

witchandconduitfromrightsteeringlever.

eeringlevershaft,andremoveshaftand

ver.

eeringlevers,reverseremovalpro-

paragraphcabove.Adjuststeeringlever

at leversmeasure7to7 Viinchesfromthe

thefullyreleasedposition.

glevers,whichareusedtosteer and

hedouble-anchor,3-shoe,external-contract-

eof thedifferentialassembly(fig.138).

ontinuousbathof oil.

djustments.Brakeadjustingpro-

rand majorbrakeadjustments.Aminor

t(par.144)consistsoftighteningthead-

ingbrakeadjustmentrod(fig. 139)to

arandbring thesteeringleverstocorrect


/ h t t p : / / w w w . h





Instructions


/ h t t p : / / w w w . h





/,andFinalDrive

eeringBrake

37).Ifaminor brakeadjustmentdoesnot

,amajorsteeringbrakeadjustment(par.

ocedurefora majorbrakeadjustment

keliningtodetermineif brakeshoesmust

rbrakeadjustmentis made.

STMENTS.

entsaremadetocompensatefornor-

knownthattheexternallinkageis prop-

tbeadjustedforlining wearwhenever

edbeyondthe verticalpositionwhenmak-

eeringleverfree traveldaily.

eeTravel.Removeadjustinghole

).Tightenadjustingrod adjustingnuton

time,until bothsteeringbrakecontrol

esoffreetravel(fig.137) beforethebrake

kedrum.Insertcontrolrodyokepinsto

ravel.Adjustingnutmustbeturned soa

liptolockthe nut.CAUTION:Free

ustbe atleast4inchesin ordertoprovide


/ h t t p : / / w w w . h





itfructions

keMechanism— CoverRemoved


/ h t t p : / / w w w . h





,andFinalDri\


/ h t t p : / / w w w . h





Instructions

keShoeAssembly

ancebetweenbrakelininganddrum when

releasedposition.Donottightenbrake

ientclearancewillresultin excessiveheat-

byglazing.

orEqualTravel.Pullbothlevers

checkforequallevertravel.If travelis

stingnut onthebrakecontrolledbythe

untilthe travelofbothleversis equal.

ctgasket;if damaged,replacegasket.In-

sandplugs.


/ h t t p : / / w w w . h





,andFinalDrive

STMENTS.

ts.Majorbrakeadjustmentsare

theexternallinkageandto obtainmaxi-

kageafterotheradjustmentshavebeen

stmentsaremadeatthetime ofbrake

ent,finaldriveinstallation,oratanytime

correctnessofexternallinkageadjust-

geisproperlyadjusteditshouldnot be

Removedrainplugsand drainoil

obeusedagain,draini ntocleancontainers

y.

ONTROLRODS.Removecotterpins

onupper endsofbrakecontrolrods.Pull

theway.

ERPLATES.Removejamnut,adjust-

seatfrombrakereverseanchor(fig.140).

hconduitclipsonleft sideofplateandmove

keoutthe remainingboltswhichattach

carrier,andliftoff brakecoverandgasket.

ovebrakecoveronoppositeside.

GHTBRAKESHOETOINSPECTLINING.

nchordown,andremovereverseanchor

retainer,and spring(fig.141).Loosen

tandscrewthe guideallthewaydown.

ustingnutwithasocketwrenchandremove

minnerendof longpinattop ofrear

eshoe outofcarrierandwithdrawthe

G.Inspectthebrakeshoelining(fig.

«inchthickor less,orifit isglazedand

oes(par.147).Examinethebrakedrum.

yhigherauthoritybeforeproceeding

KE.Ifbrakedrumandliningare

ightbrake.Connectlowershoetosteering

verwithlong pin.Insertandspreadnew

dwasheron adjustingrod(fig.145)and

aftpin. Placeadjustingnutcliponrod

ftpin.Screwadjustingrod adjustingnut,

wo tothreefullturns.

UIDECLEARANCE.Thelowershoeon

e shoeguide(fig.141).Tightenadjusting

s aresnugagainstdrums.Loosenbrake


/ h t t p : / / w w w . h





Instructions

GSHAFT

TRUNNION

keOperatingShaftandTrunnion

1). Adjustheightofbrakeshoeguideso

lpass,withslight drag,betweentheguide

brakeshoe.Tightenjamnutandrecheck

ntwillprovide0.010-inchclearancebetween

ththebrakesinreleasedposition.Repeat

ERINGBRAKEANCHOR(fig.138).In-

hor.Placereverseanchorsealretainer on

ainst thespring.Slidethereverseanchor

eris seatedintheretainerwith sleevepro-

dintospring.Placeanchorin position

hookedoveradjustingrodyoke.Loosen

nchorthrustbolt asrequiredtoholdanchor

RPLATES(fig.138).Makesuregasket

rrierandbothsteeringbrakecoverplates

sketoncoverwithgeneralpurposegrease.

ghholeincover.Guidecoverinto position

atpedestalon insideofcoversupports

ever.NOTE:It maybenecessaryto

tleverorraisethe coverupwithadriftto


/ h t t p : / / w w w . h





,andFinalDrne

LINK

EPIN

GLEVERBRAKESHOEASSEMBLY

EPIN

BrakeOperatingShaftLink

theboltswithlockwashersattop and

Onthe leftsideattachtheconduitclips.

withlockwashers.Tightencoverbolts

tuniformly.Placereverseanchoradjusting

withflatsideagainstbrakecoverplate.

ustingnutonanchorwithbeveledside

tonanchoragainstadjustingnut.

CHOR.Turnreverseanchorthrust

ontacttheanchor;then backoffonefull

thrustboltnut(fig.139).Turn reverse

untilanchoris felttocontactforward

1/2turns.Hold adjustingnutandtighten

ndplayisylo toVainch,'/ioinchis

SSHAFTLEFTLEVERHEIGHT.Remove

sketfromright steeringbrakecover.Use

ustingnut.Pull uponleverandturn

akecrossshaft leftleversocenterofclevis

machinededgeofdifferentialcarrierhous-

ntactwithdrum.


/ h t t p : / / w w w . h





elnsfruction»

SHER

justingRodSpringandWasher

NGBRAKESHAFTLEVERHEIGHT.

tcoverandgasketfromleftsteering brake

useasocketwrenchtoturnadjusting

brakeshaftleversocenterofclevispin

chinededgeof differentialcarrierhousing

twithdrum.

VERSTOPSCREWS.Loosenlocknut

ws.Adjustscrewssodistancefromthe face

e totheforwardedgeofthe steeringlevers

eversin forwardfullyreleasedpositioa

ROLRODLENGTH.Loosenbrakecon-

opsofrods.Positionsteering leversfor-


/ h t t p : / / w w w . h





/,andFinalDrive

Adjustyokesoholein leftrodyokeis

keshaftleverwhencenterofthe lever'

achinededgeof differentialcarrierhous-

contactwiththedrum.Insertclevispin

r.Installand spreadnewcotterpinin

rodyokenut.Adjustyokeon rightcon-

inedwith holeinbrakecrossshaftleft

verhole is'}\,,inchabovemachinededge

ng,andbrakeshoesarein contactwith

hrough rodyokeandlever.Installand

evispin. Tightencontrolrodyokenut.

afts forfuturereference.

VERFREETRAVEL.Refertopara-

VERSFOREQUALTRAVEL.Referto

NUTPORTCOVERS.Installadjusting

WITHOIL.Refertoparagraph34.

INGBRAKESHOEASSEMBLIES.

toparagraph145a (1).

akeControlRods.Refertoparagraph

eCoverPlates.Refertoparagraph

or(fig.138).Loosenreverseanchor

rust boltuntilflushwithinside ofdif-

verseanchor.Removeretainersealand

r.

e.Loosenthebrakeshoeguidejam

wnas faraspossible(fig.138).

eratingLever(fig.144).Remove

withsocketwrench(41-W-2573-400)and

ovecotterpins'frominnerend ofbrake

peratingleverhingepin.Pulltop ofrear

rierandwithdrawthe' longhingepin.

ofopening.Withdrawtheoperatinglever

peratinglever(fig.144).

ngShaft.Atright,removethecotter

erendofbrakeoperatingshaftlevercon-

clevispin.Examineouterendsof brake

afts andleversaremarked.Ifmarksare


/ h t t p : / / w w w . h





nstructions

chto markthepartsforreassemblyin

heboltandlockwasherfromthebrake

ff shaft.Removethethreeboltsand

keoperatingshafttrunnion(fig.143).

tof carrieruntilinnerendof shaftclears

ofbrakeshaftdownandmoveit in

Pulltrunnionoffshaft.Removeshaft

opening.

sembly.Removebrakeshoeassembly

thetopofthedrum.At thesametimelift

de(fig.142).Thoroughlywipeout differ-

es(fig.138).Removethecotterpin

etwosteeringbrakeshoelonghinge pins

wpins toseparateshoes.Disconnectthe

ectbrakedrumsandif foundtobe

erauthority.Examinelevers,pins,shafts,

placethewornparts.If liningisloose,

downto%(i-inchthicknessor less,replace

TEERINGBRAKESHOE

Positionbrakeshoesandattachadjust-

hoe,usingshortpin (fig.141).Insertand

necttheothertwoshoestogetherand

oe,usinglongpins. Insertandspreadnew

mblyinDi/ferentialCarrier(fig.142).

keshoe ontopofthe brakedrum.Feed

drum,guidingshoesoverbrakeshoeguide.

Shaft.Positionanew-gasketon

hafttrunnion,coatingwithgeneralpur-

edendofbrake operatingshaftintobrake

utthroughtrunnionopening(fig.143).

haft.Move shaftoutwardandinsert

ferentialcarrier.Slidetrunnionagainst

hreeboltswithlockwashersandtighten

atingLever(fig.144).Connect

eratinglever tobrakeoperatingshaftlink

pin.Insertand spreadnewcotterpin.

rtobrakeshoe assemblywithbrakeshoe

spreadnewcotterpin.


/ h t t p : / / w w w . h





,andfinalDrive

OCKQUADRANT

EPARKINGBRAKE"* PD339637

eMechanism

ngand Washers(fig.145).Slide

onrod againstshoulder.Placewasheron

peratingleverfulcrumpin inbrakeshoe

pin turnedtorear.Centerthehole in

verandinsertbrakeshoeadjustingrod

pin. Placeadjustingnutcliponrod

tside againstfulcrumpin.Screwadjust-

od,withtaperedendagainstclip.

s.Placebrakeshaftleveron shaft

nementtoassurecorrectangularityof

sm.Driveleverontoshaftsoboltholereg-

nstall boltwithlockwasherandtighten

verconnectingrodtorightbrake shaft

and spreadnewcotterpin.

eScrewClearance.Refertopara-

Refertoparagraph145a (8).

s.Refertoparagraph145 a(9).

Refertoparagraph145a(10).


/ h t t p : / / w w w . h





e/intructions

tLeftLeverHeight.Refertopara-

keShaftLeverHeight.Referto

topScrews.Refertoparagraph

dLength.Refertoparagraph145

eeTravel.Refertoparagraph144h.

orEqualTravel.Refertopara-

gs.Install adjustingholegaskets

eferto paragraph34.

histypeparkingbrakeconsistsof

ountedonthesteeringleverbracket.These

ntopositionbythe driver'sfoottoengage

er,whichholds leverinpulled-back

gtheadjustmentofthesteeringbrakes

ofsteeringbrakeleverparkingbrakes.

ecomesweak,defective,orbroken,

ndreplacewithanewoneby hookinginto

BLIES.

hetwofinaldrive assembliesare

fferentialhousing.Ahub,withtwotrack

setsovertheendofeachfinal drivecover

nthetrackdrive sprocketshaft.







sembliescanberemovedandinstalled

edtothe vehicle.Drainoilfromfinal

procketandmoveuppersectionfar


/ h t t p : / / w w w . h





,andFinalDrive

SHAFTGEARGUIDEP(NFINALDRIVESHAFT

emovedFromDifferentialHousing

cletoclearsprockets.Removesprockets

57c).Supportfinal driveassemblywith

nitoffboltswhile theyarebeingremoved.

ideat topofflangeandanotherbolt at

threelongguide pinssofinaldrivecover

housing.Removeremainingboltsandpry

oshort dowelsatthefrontofthe housing.

yonthelong guidepinsuntilpinionis com-

plinesonthefinaldrive shaftinthediffer-

gasketonthe finaldrivecover.See

pinswhichwerescrewedintothedifferential

valareinposition.Proceedbyreversing

al.Refillpowertrainwithoil (par.34).

t.RecordthereplacementonW.D.,


RTRAIN.

erEchelon.Obtainauthorityforthe

assemblywithanewor rebuiltunit,and

operationwhichare notcarriedinsecond


/ h t t p : / / w w w . h





Instructions

elonofmaintenance.Informationasto

ortheoperationmayalso bereceivedfrom

tenance.

ertoparagraph141h (2).

rtoparagraph157.

connecteachtrackjustbelowthe

Raiseuppersectionofeachtrackoffthe

therearuntilclearof sprocket.

dStowageBoxandDifferential

geboxassemblyfromtopoftransmission

breather.

erCahle.Disconnectspeedometer

smissioncase.Removetheadapter.Do

peningwith tape.

etachtowingcablefromrightfront

rsalJoint.Disconnectgenerator

eratordrivebeltshields.Removeeight

erswhichattachfrontuniversaljointto

ft.

erRods.Removecotterpinsand

esonsteeringlever connectingrods.

ahle.Disconnectcablefromgenerator

eCrossShaft.Unscrewbreatherat

overholeincarrier withtapetokeep

chattachbrakecrossshaftcapsto dif-

vecapsandcrossshaft.

terControlsandThrottleBracket.

dairheaterfuellinesand throttlecable

movingcoverplatecapscrews.Install cap

ovecapscrewswhichattachairheater

erentialhousing.Wireair heatercon-

toupper partofsteeringlevers.

amps.Removethetwocapscrews

ichhold thehorncableclamps.Remove

ndreinstallcapscrewsfinger-tight.

onOilCoolerHoses.Uncoupletwo

ssionhousing.Sealopeningsin fittings

pe.

veSprocketandHubAssemhlies.


/ h t t p : / / w w w . h





,andfinalDrive

G

-600)-

owerTrain,UsingFixture(41-F-2997-22O)


/ h t t p : / / w w w . h





e/nstrucrionf

EVERYOKESHAFT

ERLINKBOLT

VERYOKEBOLT

rInstallation


/ h t t p : / / w w w . h





andfinalDrive

ROD

verLinkage

dFinalDriveAssembly.Holdnuts

two lowerbolts(oneoneachside)from

de.Insertthe twosmalleraliningpins

holes.Threadchainslingthrough the

Backawreckeruptothe frontofthe

etochainandtakeupslack.Removeall

urepowertraintohull.Slackoff winch

n istiltedawayfromhull farenough

220)tobeinstalled.Boltlifting eyeto

ain(fig. 148).Hitchwreckerboomcable

ofassemblytoasnear normalposition

taliningpins.Carefullyremoveassembly.

yfrominsidevehicletopreventdamag-

omVehicle.Guidepowertrainfrom

kerismovedslowlyforward.Slackoffon


/ h t t p : / / w w w . h





Instruction!

ansmission

ain downsogearshiftfulcrumwillnot

rpowertrainhas beenremoved,place

onapowertraincarrier.Removethechain

emovethesling platesandinstallall

fromfinaldrivecoverandsteeringbrake

OWERTRAIN.

sealingcompound(51-C-1616)to

place.Lineupshimsand insertboltsso

thshims.Applyjoint sealingcompound

hull anddifferential.

nalDriveAssembly.Attachlifting

nandwreckertopowertrain(fig.148).

blysuspendedtohullopeningandaline

wreckerslowlytowardhull,loweringboom

ppedforwardslightlyatthetop.Care-

ull opening.Inserttwoaliningpinsin

de),makingsure pinspassthroughhull


/ h t t p : / / w w w . h





,andFinalDrive

nionGear,UsingPuller(41-P-2956-12)

ormahinge.Suspendweightofpower

chisattachedtotowingclevises.Slack

eliftingeye.Tiltpowertrain backuntil

Insertthetwo largeraliningpins

neachside ofthetopedgeof thehullin

ngboltholes.

nstallattachingboltsalongthetop

onottighten.Itmay benecessarytoream

theboltstoenter.Operatewinchand

ongsidesandbottom.Atleft side,install

rcornerboltswithnutsoni nside.Install

othe outside.Removeslingandtowbar.

washersin tworearholesofeachfinal


/ h t t p : / / w w w . h





e/nstructions

emovedFromTransmission

ts.Holddifferentialhousingattaching

e,andtightenevenlyfromoutside.

SprocketandHubAssemblies.

lJoint.Lineupholesin universal

angeontransmissionshaft;installbolts,

tsonbolts,and tighten.Installgovernor

ectgeneratorgroundwire.

ossShaft.Placeshaftin position.

stallcapsandboltswithlock washers,

tsteeringbrakeshaftleverrod tobrake

StowageBoxandDifferential

boxontopoftransmissioncase.Install

es.Removetapeonoilcoolerhose

ofittings ontransmissionhousing.Thelong

rwardfitting,the shorthosetotherear

ControlsandThrottleBrackets.

rentialhousingandinstallcapscrews.In-

ndthrottlecontrolcableclampsonbrake

s.Installhorn cableclampsonbrake


/ h t t p : / / w w w . h





,andFinalDrive

R

RTO

GFLANGEDIMENSION

MarkingonDifferentialCase

le.Connectgeneratorcabletogen-

Cable.Installadapterandconnect

pterontransmission.

eLeverRods.Connectleftsteering

eringbrakeshaftactuatinglever,andright

ft leftlever.Checkbothleversforproper

ecessary(pars.144bandc).

dersintoposition.

oparagraph156g(5).


/ h t t p : / / w w w . h





Intfructioni

ttachtowingcabletorightfront

eLinkageandBrakeCrossShaft

aph34.

.Refertoparagraph34.

on.Startandwarmupengines.Push

Holdhandonupperhose connectionsto

essureasenginesare accelerated.Ifpower

edandoilis notbeingpumpedintoline

essarytoremoveupperhoseconnection

peningtoprimetransmissionoilpump.If

lineafterpriming,notifyhigher authority.

gto "FULL"Mark.Refertopara-



leddifferential(fig.134)transmits

issiontothe finaldrives.Itsconstruction

kto travelfasterthantheinnertrackon

elfasterthantheotheron unevenground.

pedifferentialbecauseitalsoprovidesa

ppingthevehicleby meansofbrakedrums

s.Whenthebrakeoneither brakedrum

ersteering brakelever,itputsa planetary

hedifferentialintomotion.Asa result,

evehicleonwhichthebrakei sbeingap-

the oppositetrackisspeededup,andthe

theslowermovingtrack.Becauseof

ars,theinner trackcanneverbecompletely

rnaslong astheoutertrackis moving,

liedonthe steeringbrake.Thisprovides

abilityandmakesit safertosteerunderall

gthevehicle,bothbrakesareapplied








/ h t t p : / / w w w . h





,andFinalDrive

GFLANGETO

ARINGDIMENSION

RTO

NSIONPINRAPD 339645

MarkingsonPinionandTransmissionCase

.Refertoparagraph150.

n.Refertoparagraph151.




/ h t t p : / / w w w . h





,andfinalDrive

GFLANGE

missiontoDifferentialSpacerChecking

AdjustPinionandRing GearMesh.

HICKNESS(fig.153).Determinethe

ertobeusedbetweenthe pinionandpinion

TransmissionMountingFlange.

y12inches.Eachdifferentialcarrierwill

mewhereonthemachinedsurfacetowhich

ed(fig.154).Thisfigure maybeadecimal

ussign,in whichcaseitmustbeaddedto,

minalfigure(12inches).Somecarriers

ualdimension:for example,"12.005."

PinionShoulder.Thisdimension

pinion(fig.155).


/ h t t p : / / w w w . h





Instructions

NTIALCARRIER

TINGFLANGE

G

DrawingforDeterminingPinionBearing

surespacerthicknesswithamicrom-

ovidedinthicknessesfrom0.035to0.085

old typeshimsareinstalled,replacethem

gFlangetoOuterEndofPinion Bear-

pedonthe transmissioncase(fig.156)

ngbore.NOTE:Figuresrangingfrom

tampedonsome transmissioncases.Such

modeltransmissionand cannotbeusedfor

pacerthickness.Ifthetransmissioncaseis

notlegible,orifthe transmissionisan

ectdimensionasfollows:

eshimcheckinggage(4l-G-217-150)

eofthe innerbearingrace(figs.156and

measurethespacebetweenthe longlegof


/ h t t p : / / w w w . h





/,andfinalDrive

sionmountingflange.Addthe thicknessof

ensionetchedonthesideofthe gage

elergage willhavetobeused between

andtheinner bearingrace.Inthiscase,

hefeelergageused fromthedimension

age(1.773in.).

beinsertedundereitherend ofthe

thetransmissionmountingflangetothe

s1.773inchesasetchedonthe sideof

nusingthisgage,makecertainthatthe

etight, holdingthepinionbearingsecurely

efollowingexampleshowsthe

quiredspacerthickness:

ansmissionmountingflange

ountingflangetoouterend of

ove)1.767in.

nionshoulder(step(b)above)..10.163in.

s(step(c)above)0.020in.

238-10.183=0.055 in.

allowance0.005in.

0.050in.

ueisconstantandis0.005 in.inany

ONPINIONGEAR(fig.152).Slidere-

dthe spacerovertheheelofthe pinion

ngby strikingontoeofpinion.Install

andcotterpin.Spreadcotterpin atcenter.

ONToDIFFERENTIAL.Positionrubber

onflange.Lifttransmissionintoposition

CAUTION:Pinionandringgearmustbe

mpingislikelytodamagethegear teeth.

s. Connectoillinetofittingon transmis-

ASSEMBLY.Refertoparagraph151.

MENT.Recordthereplacementon

,"MWOandMajorUnitAssemblyRe-


/ h t t p : / / w w w . h





Instructions

GSUSPENSION

.The verticalvolutespringsuspen-

uspensionassembliesequippedwithvertical

erwheels,trackdrive sprocketsandhubs

s typeofsuspension.4Vi-inchspacer

weentherearidlerwheelmountingbrackets

sideoftrack(fig.167).Spacerbrackets

nstalledatthefront ofvehicle.Theve-

dless tracks.Thetrackdrivesprockets

re attachedtothetrackdrivesprocket

etracksupandoverthe idlerwheelsatthe

frontoftheadvancingsuspensionwheels.

ctionofeachtrackissupportedby the

pofthethreesuspensions.Thevehicleis

nsionsboltedto thehull.Twolarge

achsuspensionreston aspringseatwhich

suspensionbracket.Thetwosuspension

endon thewheelarms,arepivotedatthe

osses.Each pairofwheelarmsis sup-

agudgeonthroughthesuspensionbracket

udgeonthroughthesuspensionwheel.

sonthe innersurfaceofthesectionof

ound.Thetrackis guidedbytheend

derthesuspensionwheelsand overtheidler

etracksmadeupentirely ofthesame

nbothsidesofthe vehicle.Theproper

dbyadjustingtheposition oftherearidler

nsystemandtrackswillbe inspected

aintenanceServices,sectionXV.The

ofwear,andcorrectivemeasurestobetaken

tsofthesuspensionsystemaregiven inthe

racks.Thetracksandsuspension

possible.Cleanoffmud,andremovestones,

cludingicein freezingweather,which

erationofthe tracksandsuspension.

ytorevealanyexteriordamageor wear.


/ h t t p : / / w w w . h





pensionandTracks

htedgeToCheckTrackTension

Withthevehicleonhardlevel ground

rminetheamountofsagin sectionoftrack

acksupportroller.Usea straightedge

alongthe topofthetrackand measure

smorethan3/4 inchorlessthan l/2inch,

ructedinparagraph156 h.

vevehicleasrequiredtoobserve

cklinks.Replacedamaged,"dead,"or

r.156e).Tracklinkswillbe considered

ablelimitsifthesteelblocksarebrokenor

ked,formorethanl/2inch;or ifchevron

n75percentintact,orin thecaseofrubber

tedor beentornoffsufficientlytoexpose

k.Linkswillbeconsideredunserviceable

shingextendsoutaroundthepinmore than

ock.Linkswillbeconsideredunserviceable

r pinbushingshavewornsothat thecenter-

etweenthefrontor rearpininone linktothe

centlinkis morethan6Vsinches.Links


/ h t t p : / / w w w . h





Instructions

ceableifpinturnsor twistsinblocksothat

adjacentblockwhenattop oftrack.Per-

ackl inksvarywiththetypeof linkfor

ervice.Replacerubberlinkswhenrubber

nonthe innersurfacesufficientlytoexpose

eellinkswheninner surfaceincontact

wornor"dished"morethan \\ninch.

Wedges.Movethevehicleasre-

esof theinnerandoutertracklink con-

ked,broken,orbentconnectors(par.

uidingsurfaceof theconnectorswhere

ollersandrear idlerwheel.Ifthissurface

thexceedingVainch,replacetheconnector.

heconnectorswheretheycontactthetrack

aceconnectorsinforeignservicewhen

\\rt inch,andindomesticserviceifwear

connectorwedgestobesuretheyarenot

orn,orloose.Replacedamaged,broken,or

excessivelywornwedgeswhich,when

nchorless awayfromtheflangeonthe

scanbedetectedbyrappingwithahammer

ceofaringaroundthe nutshowingithas

ssivegapbetweenthewedgeornut and

tenloosewedges,using80foot-pounds

removed,replaceconnectorswhichhave

s.

cketsandHubs.Examinesprockets

rbrokenteeth.Replacedamagedsprockets

etsforexcessivewear.Ifteethofone

ngfacessufficientlytopermitthe wedge

bottombetweentheteeth,removeand

othsprocketsonthehub areworn,inter-

ketassemblies.Sprocketcapscrewsand

ht.Tightensprocketcapscrews,using

que.Tightensprockethubnutsevenly

s.Inspectrearidler wheelsforbent

dorcrackedwheel,andbearingfailure.

hsideof thewheelrim.Ifthe flangeshows

tssurface,this indicatesthewheelisbent

158).If theflangeononesideis worn

thewheelspindle maybebent.Sight

eelrimandifwheelis outoflinedue to

dle.Examinewheelforexcessivegrease

inersatinner sideofwheel.Ifleaking,


/ h t t p : / / w w w . h





pensionandTracks

oil retainers(par.158f(1) ).Testbear-

yandwearwhenevertracksareremoved

gand rockingthewheel.Replaceworn

158).Makesureboththe lubricating

oodcondition,andreplacedamagedormiss-

ollers.Examinetracksupportroll-

koffrollers,and spinandrockrollersto

r,or looseness.Replaceunserviceable

minerollersfor indicationofexcessive

s.Replaceleakingretainers.Makesure

gsarein goodcondition.Replacedamaged

tall attachingnutsandcapscrewsare

els.Movethevehicleasrequiredto

heelsandtires.Inspectwheelsandtires for

r.Iftireshavedeepcuts,grooves,or cracks

eparatedfromtherimdue toblow-outsor

saregougedoutbytheconnectors,replace

.162b).If tiresarewornsominimum

chesorless ortreadwidthis7 inchesor

onwheel.Examinewheelsforindicationof

oilseals.Replaceleakingoilseals(par.

162b) andspinandrockwheelsto test

mage,orlooseness.Adjustorreplaceloose

kesurelubricatingandrelieffittingsare in

amagedormissingfittings.

mblies.Inspectsuspensionmounting

ngs,andspringseatsforcracks,damage,or

placeunserviceableparts(pars.162and

tesonarmsandlevers (fig.171)and

ordamagedplates.Withvehicleonhard

tesuspensionspringsforweakorbroken

ened,takenapermanentset,or broken

loweredgeofany onecoilisevenwith

oil,the springmustbereplaced(par.163).

ndattachingcapscrewsto makesurethey

dto makesureitisnot damagedandis

whennewconsistsof79linksjointed

rsintoanendless tread(figs.1,2,and4).

erenttypesof linksarecurrentlyused,

dconditionsunderwhichthevehicleis to


/ h t t p : / / w w w . h





Instructions

kTensionWithWrench(41-W-640-400)

o-centermeasurementsbetweenthelink

eforethesameconnectionsandwedgesare

achtracklinkis madeupofasteel block

ardenedsteelgrouseriswelded.Nine

edtothe pins.Thesebushingsaretightly

sarepressedintothe twoholesbored

stingactionofthepins asthetrackbends

the rubberbushings.Slots,cutatan angle

ceivethe taperedwedges,causethepins

atthetracktendsto turninwardasit

etandidlerwheel.Ametal clipbetween

ngon eachendofthetrackpin actsasa

blockto dissipateorgroundstaticelec-

eradiointerference.Thehardenedsteel

helinkstogetherandguide thetrackasit

onwheels,andoverthesupport rollersand

cketteethengagethereplaceablecon-

ethedrivingwearinsteadofthe linkpins.

placebythe taperedforgedwedges.

ION.Placevehicleonhardlevel

sreleased.Raiseandlockexhaustdeflec-


/ h t t p : / / w w w . h





pensionandTrades

seonbracketretainingboltsand spreader

head(41-H-1838)intotubularhandle

ingsocketwrench(41-W-3058-200)on

gboltsin theidlerwheelmounting

severalturns(fig.159).CAUTION:Do

bracket.Turnthespreaderscrewcounter-

preadthebracket.CAUTION:Avoid

rew.Positiontrackadjustingwrench

onendofspindle(fig.159).Raiseend

ytorelieveloadon lockingcollar.Raise

nddrive collaroffserrationsonspindle.

ckontoserrationstohold spindlewhile

gwrench.Turnthespindleuntilidler wheel

tionand tracktensionisfullyreleased.

DLERWHEEL.Whentracktensionis

teroftheidler wheelwillbebelowthe

oftheverticalaxisofthe spindleinthe

ngthetopof thetrackorplacea straight-

ig.158).Raiseadjustingwrenchhandle

trackbetweencenterandreartracksup-

an3Ainchnorless thanViinch.

INDLE.Alineserrationsonspindle

etainingspringanddrivecollaronto

echecktracktension.Backoutspreader

ectintoslotinbracket.Tightenbothre-

curely.Thentightenspreaderscrew

workingloose.Lowerandlockexhaust

RICSHAFTPOSITION.Somevehicles

entricshaftsetinthe upperarc,orhigh

t.Tofacilitatetrackadjustment,the

esetinthe lowerarc,orlowposition,to

chtobepulledup withachainhoist,or

eteccentricshaftat timeoftrackad-

ors.

erenttracklinkconnectoristobe

hasbeenwornnearlyequalto theaverage

hichhaswearequal totheconnectoron

k.Ifthisis notdone,theunequalwear

onthelink pinbushingsandwearonthe

sengagedbythe sprocketteeth.

NECTORFollowprocedureinsubpara-

otreleasetracktension,andremovethe


/ h t t p : / / w w w . h





eInstructions

heconnectorononesidebeforeremov-

ECTOR.Followprocedureinsubpara-

talltheconnector.Checkthetracktension

ors.

vingwearononeend ofthetrack

chedtheserviceablelimit,thetrackconnec-

ualizethewearbyexchangingthemwith

ositesideofthe track,orbyreversingthe

NECTORS.Marktheconnectorsonone

Disconnecttrackattherearidler(sub-

ackonthegroundin frontofvehicles.

omeachsideofthesectionoftrackat the

ng themoffthepinsafterremovingthe

LCONNECTORS.Installconnectors

movedfromoutersideoftrackon theinner

all theinnerconnectorsontheouter

racksectionsandmovevehicleforward.

connectorsareinterchanged.Connectthe

.Adjustthetracktension (subpar.l>

erenttracklinkisto beinstalled,

ewhichhas wearnearlyequaltotheaverage

ary,trimthetreadfromnewrubberlinks

oftheother linksinthetrack.If thisis

newlinkwillsubjectitand thesuspension

ksandwear,andcausethevehicletoride

Movevehicletopositionlinktobe

nrearidlerwheelandtheground.Discon-

) below).Removeconnectorsfromthe

mor drivingthemoff.

nstalltheconnectorstojointhelink

ck.Connectthetrack(subpar.g(5)

on(subpar.babove).

ks.

ack"isthetermcommonlyusedto

torsononeside haveclimbedupontothe

rthe teethonthedrivesprocket.The

nalmosteverycaseisinsufficienttrack


/ h t t p : / / w w w . h





pensionandTracks

RAPD339636

dConnectingTrack


/ h t t p : / / w w w . h





nstruttions

mbedthe idlerwheel,itcanoftenbe

onnectingthetrack.Ifthetrackhasclimbed

alwaysbedisconnected.Procedurefor

ckalsodependsupontheaccessibilityof

eis bogged.

TRACK.Ifvehicleislocatedso that

isconnectingbetweensprocketandsuspen-

spensionwheel,disconnecttrackatthemost

hicleontodrysolidgroundandinstall

henvehicleislocatedsoworkcan be

n(subpar.b(1)above).If thetrackhas

positioningitwithcrowbars.Ifthis can

tension(subpars.b (2)and(3)above).

ositioned,disconnecttrackmidwaybe-

pensionwheel(subpar.g(2) below).

ar.g(5)below)andadjusttrack tension.

ddrivesprocketdisconnecttrackbetween

spensionwheel.Repositiontrackand

etrackscanbedisconnectedmid-

ckdrivesprocketsorbetweentherear

.If thetracksaretobe disconnectedto

torsorlinks,this isusuallydoneatthe rear.

emoved,thetrackisusually disconnected

fig.160).Releasethetracktension

ovewedgenutfromouterwedgeand

eleft-handtrackconnectingfixture

tertrackconnector.Alinethefixturewith

ctorstraightoffandtakeupslack.Secure

byturningtheadjustingscrew.Operate

orabouthalfwayoffwhilestrikingconnec-

Removeadjustingscrewfromright-hand

ndinstallfixturetoholdlinkpins. Tighten

utnotenoughtobind connectorasitis

deconnector.Removewedgefrominside

dfixtureholdingoutsideendsofpins,

onthe insideconnector.Pulltheconnec-

endsofpins.Removetheleft-handfix-

stingscrew.Installthefixturetohold the

mannerastheright-handfixture.Drivethe

ns.Operatethefixturejacksin unisonto

tiltracktensionis releasedandfixtures


/ h t t p : / / w w w . h





spcnsionandTraelu


/ h t t p : / / w w w . h





Instructions

ophalfoftrackto therearofthe

ound.

ethenewtrackaheadofthevehicle

oved.Temporarilyjointhetracksby

partway.Ifold trackiscompletelythrown

onwheelsarerestingonthe ground,diga

efrontsuspensionwheeldeep enoughto

newtrack.Useaboardorcrowbarslaid

pwhenthe vehicleistowedontothenew

wardontothenewtracktowithin 16

cksuspensionwheelstokeep vehicle

thenewtrackfromtheold.Movethe

xtremeforwardposition.Temporarilylock

retainingbolts.Attachcabletorearend

vehicleandpull thetrackupandover

ollersuntilitengagesthe sprockets(fig.

thecable.Turnthesprockethubwith

bringtheends ofthetracktogether.Re-

movetheadjustingscrewsfromthe

(41-F-2997-86).Placethefixturesinline

endstogetherasshownin figure160.

connectorsslideontopins.Drivethecon-

movethefixtures.Then drivethecon-

ink.Insertthe trackconnectorwedgeand

ennut,using80 foot-poundstorquewhile

oseat itsecurely.Repeatforopposite

on(subpar.l>above).Installfenders or

oved.

Tracks.

inksshowinggreaterwearonthe

nbeinterchangedwiththetrackonthe

ewear.Rubbertrack(ModelT51)

reversedorturnedend-for-endto equalize

ectorsorblocks.Allchevron-typetracks

KS.Withthevehicleonahardlevel

racksatthefrontandtowthe vehicleoff

ckinto positionwiththerearend ofthe

ontsuspensionwheel.Positiontheright

ensionwheel.Towvehicleontotracks.

tracktension.

owsameprocedureasinstep(2)

turnedend-for-endandinstalledon the

omwhichthey wereremoved.


/ h t t p : / / w w w . h





pensionandTracks

CKETSANDHUBS.

procketsandspacerbrackets(fig.

chtotheouterandone ofeachtotheinner

ockethub.Theteeth onthesprockets

ectorstosupportanddrivethe track.

ngedonthehubs,orthe hubandsprocket

e vehiclecanbeinterchangedwiththe

,to equalizewearonthedrivingfaceson

eplacingorexchangingsprockets,select

ualwearso astoequalizethedriving

ckethubisattachedtothe drivesprocket

ndsafetynuts(fig.160).Dowels(tapered

e studsunderthenutsand fitthetaper

nutsaretightened,thewedgestakeup

estudsandholestopreventthe hubfrom

earingthe holes.

DriveSprocket.

ESPROCKET.Ifonlythe outertrack

moved,itisnotnecessarytodisconnectthe

setracktension(par.156b(1)), and

ichattachsprockettohub,supportingthe

screwis beingremoved.Pulltrackclear

hesprocketto theground.

ESPROCKET.Settheparkingbrakes.

sitionandwhileit isbeingheld,screwin one

enteroftheupperrear quarterofthehub.

pivot,forcethesprocketintoplacewitha

ewinseveralcapscrews;thenremovethe

erofthe capscrewsandtightenthem,

quetodrawsprocketupevenlyand secure-

(par.156 b).Lowerthefenderinto

ocketAssembly.Ifhubandsprocket

hanged,thefollowingprocedureusuallyis

the vehicleatthesametime:Raisethe

sandbackthem offthreeorfourturns.

betweensprocketandfrontsuspension

vetrackbackuntiltrackclearssprocket.

easrequiredto jarthehubstud dowels

oistingequipmenttosupporthub.Pry

ketattopandbottomto forcehuboff

dsprocketassembly.

orHubandSprocketAssemblies.

e hubarebeinginterchanged,remove


/ h t t p : / / w w w . h





Instructions

earIdlerWheelNut

nterchangesprockets.Tightencapscrews

dsoftorque.Ifhubandsprocketassem-

ed,replaceold-stylecapscrewswithnew

e.Tightenallsprocketcapscrewswith

nds.Shifthub andsprocketassemblies

e.

inaldrive mustbeinspectedforoil

nbolts orreplacegasket.

Assembly.Raisetheassemblyand

e sprocketshaftstuds.Placedowel

installnew safetynuts,andtightennuts

nectthetrack(par.156g(5)).Lower

S.

herearidler wheels,whichsupport

onlargeheavy-dutyballbearingsmounted

elendof thespindleiseccentricwiththe

e mountingbracket.Thisprovidesa

sitionofthe idlerwheeltoadjusttrack


/ h t t p : / / w w w . h





pensionandTracts

erWheel,UsingIdlerWheel

CK.Releasethetracktension(par.

rackbelowthe idlerwheeltobere-

dmoveuppersectionoftrackforwardon

keoutsixcapscrews,andremove

hecotterpinfromspindlenut. Unscrew

1-W-3058-48)asshowninfigure162and

Attachtheidlerwheelpuller(41-P-2940-

apscrewsandwashers.Holdpullerfrom

dyofpuller andturnthepuller screw

nwheelisfree,liftit straightoffspindle

ners.Removetheidlerwheelpuller.

Supportidlerwheel,outersideup,

hehub bore.Prybearingspacertoone

gand oilretainersbyworkingdrift

urnwheeloveron blocksandliftout


/ h t t p : / / w w w . h





e/nstructions

earIdlerWheelInnerBearing

bearingracepuller(41-P-2905-60),and

earingordrive itoutbyworkingdrift

ace.

cleanthespindleandtheinsideof

ngsandoil retainersindrycleaningsol-

cksordamageandhubbore forwear.

aged,cracked,orchippedballsandspin

freeandnotworn.Makesure bearing

maged,orgalledonthe ends.Examine

ge.Makesuregroundsurfacesincontact

nginner racesarenotscuffedorscored.

n,orunserviceableparts.

heel,outersideup,onblocks.Pack

g.161)withgeneralpurposegrease.Start

bytappinglightly onouterrace.Drive

atsagainsttheshoulderbyworkingthe

ngouter race.Turnwheeloverandplace

erenddown,inthe hub.Packtheinner


/ h t t p : / / w w w . h





pensionandTracks

ofTool (41-T-3216-150)onRearIdler

osegrease.Startthebearingsquarelyin

ontheouterrace.Drivebearinginto hub

houlderbyworkingthebrassdriftaround

164).

RSONSPINDLE.Soaktheretainersto

minutesinwarmedengineoil tosoftenthe

piecespacernotoverVi«-inchthickto be

lretainersinthehub toprovideclearance

nerandtheflangeon spindle.Asuitable

byremovingthethickri ngfromaworn

aseseal) andsawingitinhalf. Lightly

tainerleathersealswithgeneralpurpose

nthespindle withtheleatherlipfacing

efullyworkit ontotheshouldernexttothe

econdoilretainer(greaseseal)the same

thespindle flange.Insertthehalvesof


/ h t t p : / / w w w . h





pensionandTracts

eelMountingBracketandSpacer

the nut(fig.162),usingsocketwrench

ndspreadnewcotterpin.Usingnew

eelhubcap withsixcapscrewsandlock

crews.Fillhubwithgeneralpurpose

relieffitting.Connecttrack(par.156g

n(par.156 b).

MOUNTINGBRACKETS.

herearidler wheelmounting

gsboltedtothespacerbracketswhichare

ofthehullon eachside.Theidlerwheel

thebottomsothespindlecan betightly

racket.

acktension(par.156b).Disconnect

el(par.156 g(2)).Pulluppersectionof

el.Removetheinnerspindleretaining

erwheelbracket.Removecotterpinfrom

fthelockingcollar.Supporttheidler

tofbracket.Removetheattachingcap


/ h t t p : / / w w w . h





tutructions


/ h t t p : / / w w w . h





pensionandTrocks

wheelmountingbracketandshims.To

utthelockwire,removecapscrews,and

hull (fig.167).

eused,coatthemwith jointsealing

ndpositiononhull.Placespacerbracket

hreads ofcapscrewsandholesinbracket

ndandinstall.Positionidlerwheelmount-

pacerbracketandinstall, usingsealing

orspacerbracket.Tightencapscrewsand

67).Raiseidler wheelandspindleand

Installtheinner retainingbolt.Slide

ofspindle andinstallanewcotterpin.

e trackbackovertherearidlerwheel.

6g(5)). Adjustthetracktension(par.

LLERS.

hesixtracksupportrollers areof

Therollersturnonballbearingsmounted

erollerbracket.Eachrolleris provided

lieffitting.

dureinparagraph161andremove

romthe suspensionmountingbracket.

chattachrollershaftto thebracketand

Placerollershaftinvise, innerend

sherdownoutof notchinlockring.

nnerwrench(41-W-3260)asshownin

washer.Removebearingretainerwith

61)asshowninfigure170.Liftroller off

aringspacer.Placerolleronblocksspaced

thl ongdrift,driveoutthelower bearing

drift aroundbearingouterrace.Turn

bearinginnerspacer.Driveout theother

tsandcenterbore ofroller.Carefully

sivewearordamage.Makesurebearing

turningin rollerboreandthatroller isnot

rdamageorwearonsurfacescontacted

ofbearingsonshaft toseethatthereis

tbearingspacersfordamageorwear.Make

effittings areingoodcondition.Asoil

gedwhenremoved,theymustbereplaced.


/ h t t p : / / w w w . h





Instruction*

pportRollerBearingLockRing,

-W-3260)

koilretainersin warmengineoilfor

visewith inner,orflanged,enddown.

nnerend up.Packbearingandcoat

withgeneralpurposegrease.Startbear-

e.Drive bearingintoplaceagainst

workingdriftaroundthebearingouterrace.

ainerwith antiseizecompound.Startoil

rborewith lipofleathersealturned up.

eendanddriveoil retainerintoplace

ore,takingcare nottodamageordistort

aringspacerinto theoilretainerwith

.Turnrolleroveronblocksand insertthe

lltheotherbearing andoilretainer.Care-

onto theshaft.Screwthebearingretainer

ench(41-W-3261).Placeanewlock

and tightenthebearinglockringwith

60).Securethelockringbybendingear

nring.


/ h t t p : / / w w w . h





pensionandTracks

pportRollerBearingRetainer,

-W-3261)

oplaceon bracket.Installand

boltswithsafetynuts. Applylubricantas

er(par.34).Followprocedureinpar-

bracketwithroller.

LLERBRACKETSANDSKIDS.

upportrollerbracketsareheavy

of eachsuspensionmountingbracket(fig.

ntingbrackettrackskidsatthetop of

rackwhenitdropsbelowthe rollerwhen

movethefourcapscrewswhich

pensionmountingbracket.Slidetheskid

Bracket.Withahydraulicjack

nbracket,raisethetracksufficientlyto

pportthebracketand roller,andremove

chittothe suspensionmountingbracket.

bracket.


/ h t t p : / / w w w . h





Instructions


/ h t t p : / / w w w . h





pensionandTracks

acket.Raisebracketandrollerinto

ocapscrews,withinternal-toothedlock

uspensionbracket.Installtheothercap

tencapscrewsevenlyandsecurethem

ethroughthethreescrewsoneachside(fig.

hehydraulicjack.

rackskidinto position.Installthe

withinternal-toothedlockwashers.Tighten

oopof lockingwirethrougheachpair

LS.

hetwelvesuspensionwheelssupport

faceof thetrack.Thewheelsareof

yturnontaperedrollerbearingssupported

geonthroughtheendsofthearms.The

torims,whichare pressedontothewheels

re.Onlythelatesttypewheelswithtapered

edinthe followingsubparagraphs.

UT.Removearmwheelendgudgeon

3.Ifnecessary,prywrenchhandledown

sswrenchhandleandunderedgeofhull

HEEL.Placethewheellift(41-L-1375)

msofthewheeltobe liftedandwiththe

ayfromthewheel(fig.174).Slowlymove

orbackward,dependinguponwhichwheel

theliftinto averticalposition,andraise

:Itwill benecessarytodisconnectthe

whenusingliftto raisefrontwheel.Set

touterendofarmwheelendgudgeon,

washerusedtoprotectthe threadsinthe

threadedendofslide-hammertype

7-27)intoendofthegudgeon(fig.175).

t)outhardagainstnuton endofpulleras

eon.Rollwheelawayfromarmsandlift

eel,outersideup,onblocks.Bend

rdownoutof notchinbearinglocknut.

unscrewlocknutfrombearingsleevewhile

sleevefromturning.Removenut,lock

kingplate(fig.176).Removepinfrom


/ h t t p : / / w w w . h





eInstructions

teSpringSuspensionAssemblyParts


/ h t t p : / / w w w . h





pensionandTraces

ERBRACKET

ER

EW

LUGS

GBRACKET

SPRING

SHING

CAPSCREW

BBINGPLATE

G

SEAT

CKEFEND

CREWS

BBINGPLATE

T

AP

CAPLOCK

CAPSTUDS

EW

HEELEND

ACINGPLATE

SHINGS

ACERS

esinpinholesin adjustingnut,unscrew

amagethreadsonsleevewhileholding

eadjustingnut.Turn wheeloverand

er locknut,lockwasher,oilslinger,and

emovedin thesamemannerwhileholding

gdriftthroughthe upperbearingconeand

helowerbearingcup todriveoutthe

Turn wheelover,anddriveouttheother

oroughlycleanallpartsand theinner

eelhub.Carefullyinspectbearingcone,

vewearordamage.Inspectboreof hub

as notbeenturninginthe hub.Oilseals

nremovedandmustbereplaced.Inspect

eoil sealcontactsurfacesaresmoothand

gconeandrollersonsleeveto makesure

orn.Inspectgudgeonforwearanddam-

Makesurewheelisserviceable,andthat

gsarein goodcondition.

koilsealsin warmengineoilfor30

theinnersurfaceofthebearingsleeve

orgeneralpurposegrease.Withwheelon

bearingcup squarelyintohubborewith

o placeuntilitseatsagainstshoulderin

oundtheedgeofthecup.Packthe cone


/ h t t p : / / w w w . h





uspensionArmWheelEndGudgeonNut

thofthethreads onsleeve.Placethecone

insertthesleevethroughthe coneand

esonoilseal andadjustingnutwithgen-

theoil sealsquarelyintohubborewith

ndrubberseal sideup.Useasquare-

roundtheoilseal,takingcarenot todis-

iledrivingitintoplace againstbearingcup.

vewithlipside up.Turnadjustingnut

nutwith aholeinthe plate(fig.176).

plateinto adjustingnut.Installoilslinger

ewlockwasheron sleevewithinnertang

knut andtightenwithpunchandham-

r fromturning.Bendoneofthelock


/ h t t p : / / w w w . h





pensionandliocks

in locknut.Turnwheelover.Install

ers.Screwtheadjustingnutonto sleeve

llguide(41-G-1235-505)onarmwheel

gure 177.Insertthegudgeonthroughthe

stosupportgudgeonsowheelis freeto

rectionswhiletighteningadjustingnut

nda slightdragisfelt.Then backoff

one-quarterturnto allowwheeltorotate

ndplay.Removethegudgeon.While

e adjustingnut,installtheoil seal,lock-

er,lockwasher,andlocknut.Tightenlock

kwasher.

Woodruffkeyissecurelyinstalledin

ositionandinsertgudgeon(fig.177)

ub.Alinekeyin gudgeonwithkeywayin

oplace.Coatcapscrewthreadswith gen-

stallcapscrewwith lockwasherinendof

onguide(41-G-1235-505).Installthe

eon.Applylubricanttowheelasinstructed

4).Movevehicletolower wheelonto

t(41-L-1375).Beforedrivingvehicle,

necessary,totightengudgeonnutsecurely.

NSPRINGS.

woheavysteelvolutespringsare

hespringsare heldinaverticalposition

ngseatatthebottomand thesuspension

p.Nocenterguideis necessarysinceeach

withinanothercoil.

eforremovingvolutespringsfrom

47527AandD47527B)isgiveninthefol-

E.Stopthevehicleonahard level

kblockscentereddirectlybelowthe

terstudandapplyparkingbrake.

RACKETPLUGS(fig.178).Useplug

traightsectioncutfrom%-inchsocket

shortenoughtobeusedundertrackskid,

pof bracket.Cleandirtoutfrominside

seats.

INERS(fig.178).Removenutand

edendofone volutespringretainer

ongthreadedendofotherretainer.With

therend,insertthe retainersupthrough


/ h t t p : / / w w w . h





Instructions

RACKET

nsionWheelWithLift (41-L-I375)


/ h t t p : / / w w w . h





pensionandTracks

ensionArmWheelEndGudgeonWith

P-2957-27)

untiltheyprojectthroughplugholesin

and washersonupperendofretainers,

nersfromturning,and tightennutsat

hspringsstart tocompresstoholdthe

cketcapsareremoved.

PANDSTUDS(fig.179).Makearef-

and edgeofbracket.Removethenuts

cketatouterside onlyandremovethe

neofthe studsandlockthemtogetherby

other.Usinga wrenchoneachnut,un-

bracket.Removetheothertwostuds.

WITHSPRINGCOMPRESSORS.Witha

endofthevolutespring compressor

ecompressorthroughthecenterholein

moved,soflatsideofcapcontactsbearing.

urelyintothecenterholeinlower endof

ssornutuntilgudgeonsarefirmlyseatedin


/ h t t p : / / w w w . h





Instructtons


/ h t t p : / / w w w . h





pensionandTrocks

spensionArmWheelEndGudgeon

vethecapandstuds fromtheinnerside

ther compressorwithcapinthesame

ressornut.

INGPRESSURE(fig.179).Loosennuts

ers(41-R-2454-75)butdonotremove.

ve,nutsatbottomend ofretainerssonuts

ringseat withatleastthreefull threads

orkingatboththe innerandoutersideof

ompressornutsevenlytopreventbinding

ered,untilsprings areextendedtotheir

released.Backoffthecompressornutsa

ngsand springseatsaresupportedbythe

WHEELSANDARMS(fig.180).Re-

ssors(41-C-2556-2S)andcaps.Remove

ndsofgudgeons.Raisethe suspension

witharmsoutfromundertrack.


/ h t t p : / / w w w . h





ntfructions

NDERMIDDLESTUD

LE

GS

g Retainers(41-R-2454-75)


/ h t t p : / / w w w . h





n»ionandTrack*

1-C-2556-25)

SURE

pringPressure


/ h t t p : / / w w w . h





nsrructiani

RMS

D343094

prings


/ h t t p : / / w w w . h





pensionandTracJrs

AINERS(fig.180).Installbothspring

-25)withcapsasin step(5)abovebutdo

,obtain twousedgudgeons;ifnot,re-

s.Positionthetwogudgeonsingroovesin

etracklinkontop ofgudgeonssoitis

tandparallelto hull.Tightenbothcom-

pringsstart tocompressandloadis relieved

R-2454-75).Removenutsfromupperend

tainers.

INGS(fife.180).Lowerthespringsby

ornutsonbothsides evenlyuntilsprings

prings.Supportthelevers andspring

rcompressor(41-C-2556-25)andgudgeons.

ngseatasanassembly.Thenremove

ringsurfacesclean.Inspectallparts

ngsonendsofspring seatandifexcessive-

t.Removeringsfromspringseat bosses,

verseorreplacetherings.Examinebush-

ndif bushingsareexcessivelyworn,replace

ring seattomakesurebushingshavea

inch.Examinerubbingplateson boththe

essivelywornor damaged,replacethe

rivethe gudgeonsoutofthesuspension

andbushings,andifexcessivelyworn,re-

s.Alsoinspectthe suspensionarmspacer

hevolutespringsfor wearorcracks.If

ninstalled,revealsweaksprings,replace

pringshavebeenin serviceforonlya

pringneed bereplaced.

ureforinstallingverticalvolute

mblies(D47527AandD47527B)isgiven

ONLEVERSANDSPRINGSEAT.Make

U,fig.172)isin positiononeachspring

onleversonspring seat.Placethelever

hebracket

NGS(fig.180).Installspringcom-

thcapinoutersideof bracket.Raisethe

mbly.Positionthetwogudgeonsin the

racklinkto supporttheseatandlevers.

sintoposition onspringseat.Tighten

nlyuntilbothspringsstart tocompress.

INERS.Installthetwospringretain-

ectedinsubparagraphh(3)above;then


/ h t t p : / / w w w . h





e/iwtructions

evenlyuntilloadisrelievedfromcom-

PRESSORS.Backoffnutsonbothspring

-25)evenlytolowerthe gudgeons(fig.180)

isclearofspringseat.Lift outthetrack

s.Removethetwospringcompressors.

WHEELSANDARMS.Ifgudgeonswere

ycoatinsideofarmbushings(AK, fig.172)

se.Inserttheuntappedendof gudgeon

m,througha spacer(AL,fig.172),and

itiscenteredin thearms.Rollthe

ntopositionontrackunder suspension

bleandpositiontheotherwheelinthe

eelstogetherandplaceaspacingplate

ofthegudgeonsagainstthearms.

AINERS.Turngudgeonstoplacenotches

erticalposition.Positionbracketcapon

2)withreferencemarksturnedinright

ressorinbetweenthegudgeonssotheyrest

wcompressorsecurelyintocenterholein

thercompressorwithcapin innerend

r.Thegudgeonsmustbe keptfromturning

.Thencapstuds canbeinsertedwithout

chedtoendof bracket.Toholdgudgeons

he bracketcapstudsthroughtheholein

ngudgeon.Whenworkingonleftside of

towardthefrontofthe vehiclewithastud

erbracketcap,soas nottointerferewith

essornuts.Theothergudgeonwillbeheld

siteholeininnercap.Workingat both

nutsevenlytopreventbindinguntilsprings

oad isrelievedfromspringretainers

utsattop ofretainersandremovere-

PRINGS.Positionsmalljackunderspring

compressingsprings.Holdgudgeonsfrom

Workingat bothsides,tightencom-

pressspringsuntil bothcapsaredrawnup

ket(fig.180).Install bothspringretain-

ructedinsubparagraphb(3)above.

utsatbottomto furthercompresssprings

anceatrubbingplatesatendsof levers

APS.Backoffnutonoutercompressor

mpressor(41-C-2556-25)withcap.Screw


/ h t t p : / / w w w . h





meter

ofbracket.Screwtwonutsontothestud

eother.Using awrenchoneachnut,

allthe othertwostudsinthe sameman-

nstalland tightensafetynutsonthe

thespringcompressoroninner sideof

dsandcap inalikemanner.

RACKETPLUGS.Backoffthenutson

runtil loadonspringretainers

.Removethenutsatthetopof there-

rawtheretainersdown throughthespring

ejack.Coatthethreadson bracketplugs

tightenbothplugsintop ofbracket(fig.

1-W-1960)orwrenchpreviouslymade

e.

ON.Checktracktension(par.155c)

r.156b).

HOMETER

ometerconsistsofthethreeunits:the

ft,andthe driveadapterunit.Thehead

ntpanel facenearthebottomandleftof

dapteris locatedontherightrear side

connectedwiththespeedometerheadby

aft.The speedometerindicatesthevehi-

accumulatedtotalofmiles traveledupto

callyreturnstozero.It alsoregisterstrip

on thetripodometer,whichmaybereset

esetknob.

placement.Removetheinstrument

d).Removenutsandl ockwashers,and

throughfrontofinstrumentpanel case

roceduretoinstallspeedometerhead.In-

ecover(par.186e).

erFlexibleDriveShaft(fig.181).

atbackofspeedometerheadandpullthe

ometer.Unscrewknurledcouplingwhich

offlexibleshaftto driveadapteratright

ullshaft drivetipfromadapter.Pull

asingfrom instrumentpanelend.

eterFlexibleShaft.Lubricateflexi-

lation(par.34).I nsertshaftincasingat


/ h t t p : / / w w w . h





Instructions

peedometerFlexibleDriveShaftFromCasing

pushit throughuntilotherendprojects

n.Insertflexibleshaftdrivetip into

curewithcoupling.Insertoppositeendinto

withcoupling.

pterReplacement.Backoffspeed-

gandpullshaftend fromadapter.Un-

daptertotransmissionandremoveadapter.

,reverseremovalprocedure.

meters,oneforeachengine,arecen-

mentpanelcasecover.Thetachometer

rankshaftrevolutionsperminuteinhun-

nginecrankshaftrevolutionsinthousands.

enbymeansofflexibledriveshafts which

terheadsintheinstrumentpanelto the

endofthe engines(fig.136).

acement.Removetheinstrument

d).Backoffflexibleshaft couplingfrom

venutsandlockwashers,andlifttachom-

nstrumentpanelcasecover.Toinstall


/ h t t p : / / w w w . h





meter

FLEXIBLE

OMETERADAPTERSHAFT

AdapterRemovedFromDrive

eremovalprocedure.Installinstrument

e).

rFlexibleDriveShaft.Unscrew

shaftcouplingandpullshaftendfrom

ffknurledcouplingfromdriveadapter

ofengineinfighting compartment.Pull

madapterandpull driveshaftfromcasing

terFlexibleDriveShaft.Lubricate

nstallation(par.34).Insertflexible shaft

elend andpushitthroughuntil itprojects

g.Insertdrivetips ofshaftintachometer

dsecurewithknurledcouplings.

pterReplacement(fig.182).Back

aftcouplingatadapterandpullshaft drive

rewnutwhichsecuresadapterto housing

oinstalladapter,reverseremovalpro-


/ h t t p : / / w w w . h





Instructions

stemconsistsoftwostarters,two

twostarterswitchesontheinstrumentpanel,

hes,andthewiresandcablesconnecting

stemoperatesona 24-voltcurrentsup-

hare connectedtothestartersthroughthe

inecompartmentterminal.NOTE:The

ownin figure183.Figure184showsthe

re185 showsthe(LC)starterwiring.

switches,oneforeachstarter,are

andcornerofthe instrumentpanel(fig.

onis pushedin,currentflowsfromthe

esolenoidswitchandstarter.The switch

rethan30secondsata timesincethis

lyheavydrainonthebatteries.

umentpanelcasecover(par.186d).

asher.NOTE:Leavetherubbershield

sconnectwiresfromtheswitch,andnote

correspondingterminals.Removethe

ernal-toothedwasher.

y,installswitchintheinstrument

stspacernutso thatseventhreadson

ndfrontoffaceplate.Removeswitch,in-

her,andinstallswitchincasecover.Install

thrubber shieldattached.Presstherub-

ttonso thattopedgeofshield fitsin

nnectwirestoproperterminalsas shown

mentpanel casecover(par.186e).

SWITCH.

xiliaryswitchismountedoneach

anelinthe enginecompartment(fig.43).

art thejenginesfromtheenginecompart-

oltmasterswitch.Removethelock

aceplatetoairheatercoilpanel.Remove

washer,andlockwasherfromswitchbut-

plateandpullswitchoutasfaras possible

witchterminals.Removetheswitch.


/ h t t p : / / w w w . h





^-BATTERY=


/ h t t p : / / w w w . h





eInstructions

A)StarterSolenoidSwitch

tchontheairheater coilpaneland

rminals(fig.183).Installswitchfaceplate,

ocknut,andrubbershieldto switchbutton.

andtightensecurely.Turnon2 4-volt

allationbyoperatingswitches.

WITCH.

switchismountedoneachcranking

oidisoperatedby eitherthestarter

anelorthe auxiliaryswitchintheengine

therswitchbuttonenergizesthesolenoid,

rpinion intoengagementwiththeflywheel

e starterswitch.Whentheenginestarts,

tofmeshwiththeflywheelring gear,and

lswitchbuttonisreleasedand pressed

tarter(par.170b).Disconnect

witch(fig.184).Put washerandnutback

vepinstodisconnectsolenoidshiftlever

velockingwiresandfourscrewswhich

tarter,andremovesolenoidswitch.


/ h t t p : / / w w w . h





TERSOLENOIDSWITCHOILER

ER

led

solenoidswitchonthestarter,and

ockingwires.Connectthesolenoidshift

.Connectthestartercabletothe solenoid

estarter(paragraph170 c).

eisequippedwitha12-brush,24-volt,

edontheflywheelhousing(fig.185).The

allyshiftedintoengagementwiththefly-

chbeforethestarter switchcontactsare

tated.The pinionisthrownoutof mesh

versalof torqueastheenginestarts.

masterswitchoff.Removeengine

par.216b)underthe enginefromwhich

Removetheclampsholdingstartercon-

ethreeattachingscrewswithlockwashers

elhousing.Disconnectthesolenoid


/ h t t p : / / w w w . h





eInOructions

solenoid(fig.184).Removetheterminal

kingwireandunscrewingcap.Remove

nalstudrecessedinto terminalshield.Un-

tonstartercableconduit,removethe

erminalstud,andworkcableout ofter-

erandsolenoidswitchassemblyfrom

d185).Connectthestarter cableto

i nstallcapandlockingwire.Tighten

nectwiretotopofsolenoidswitch.Posi-

singandinstall attachingscrews.Attach

engine.Turn24-voltmaster switchon

arter bystartingtheengine.Installen-

ate(par.216c).

NGSYSTEM

dgeneratingsystemconsistsoftwo

edinseriestoproduce24volts,the master

generatorregulator,andthenecessary

ts(fig.186).An auxiliarygeneratorand

chargingthebatterieswhenturret and

avycurrentrequirements.Theseunitsare

I.Thebatteryandgeneratingsystem

arytooperatethestartingand lighting

chargein thebatteries.

-volt,lead-acidtypebatteriesarecon-

e24-voltswitchonthemasterswitchbox

shes24volts totheelectricalsystem,

ne batterytothe12-voltswitchsupplies

Thebatteriesare housedinthebattery

e underthefightingcompartmentfloor

)leadof thebatteryseriesisgrounded

ve(+)leadsarethe12- and24-volt

erswitchbox.

aterintheelectrolytesolutionwill

turesorwithexcessivechargingrates.In-

frequentlyandfillthebatteries asrequired.


/ h t t p : / / w w w . h





TTERYCOMPARTMENT

GeneratingSystemWiringDiagram

achbatterycellseparately.Press

esterfirmlyagainstthenegativeandposi-

voltmeterattachedtothetestershould

eachcellinthebattery.

emovethebatteryfillercapsandtest

thahydrometer.Thechargeinthe bat-

beindicatedbythe figureonthesmall

vethelevelof thesolution.Addtoorsub-

cordancewiththetemperaturecorrection

rometertoobtaintheactualspecific

rometerreadingsshowtheconditionof

atingtemperature(80° F):

300

alfcharged,rechargeorexchangefora

RHOTCLIMATES.Inhotclimates

pecificgravityelectrolyte(1.245)is

xcessivedeteriorationofplatesandsepara-


/ h t t p : / / w w w . h





struction*

;olyteTemperatureCorrectionChart

ravityofa fullychargedbattery,remove

of theplates.Adddistilledwatertobring

nchabovetheplates;thenchargethe bat-

of 1.245isobtained.

RCOLDCLIMATES.At.temperatures

thebattery becomesgreater,andthe

tteryisreduced.Forthis reason,when

itwillbenecessarytomaintainthe specific

rolyteat1.250or higher,an^toreplace

cgravityis belowthatpoint.Thefollow-

yofthe batteriesandtherelativefreezing

atures

6° F

55-60° F

20-30° F

185-8° F

ed1.150+5° F

arged1.100+19° F


/ h t t p : / / w w w . h





ystem

TopCover— Installed

ettop(fig.225)and raisefighting

Turnoffthebatterymasterandradio

rclampsandremovethebatteryboxtop

ctthegroundcableandothercablesfrom

189).Bendthecableswhichlead into

way.Removethebatteryhold-down

sout oftheboxontothe fightingcompart-

o thebatteriesandliftthemout, oneat

topopenings.

batterybox,trays,andhold-down

ngoodconditionandfree fromcorrosion.

sinthebatterytrays ifnecessary.Open

dlowerthetwobatterieswitha sling

mentsubfloor.Liftonebatteryintothe

nalpostsinboard.Placethe wooden

nsttheend oftheforwardbattery.Then

straywiththe terminalpostsforward.

esoverthebatteriesandtighten thehold-

batteryterminalshavebeenremoved,

postsas showninfigure189andtighten

eterminalnutssecurelywithatoothed

erminalandthecableterminal.Toprevent


/ h t t p : / / w w w . h





Instructions

E

stalled

edsurfacesoftheterminalswithathin film

andinstallthe topcover.Lowerfighting

ntoplaceoverbatterycompartment

he24-voltmasterswitch,mounted

s locatedbehindthedriver'sseat(fig.190).

electricalpowerisshutoffat thebattery

owerusedby theinterphonesystem.This

eparate12-voltmasterswitch.

he12-voltmasterswitchislocated

switch(fig.190) andisusedto control

phonesystem.


/ h t t p : / / w w w . h





stcm

CH

CH

CLE

T

Box-CoverRemoved


/ h t t p : / / w w w . h





(nifrucfions

KET

nstalled

).Disconnectcablefrompositive

ethefourscrewsfromthemasterswitch

cover.Removethecableandwirecon-

Removethescrewswhichholdtheswitch

vethe switch(fig.190).

herswitchin themasterswitchbox,

x withfourscrews.Attachthecablesand

itchasshownin figure190,andsecurethe

hfour screws.Connectcabletopositive

aingeneratorisusedin thevehicle

ket-mountedontherearofthe transmis-

hepropellershaftas showninfigures134

sa 24-volt,50-amperecapacityandis

regulatorforcurrentcontrol.Aradio

dafilterarelocatedinthe generatorregu-

227).

neratorbeltsareadjustedcorrectly

aximummovementmidwaybetween


/ h t t p : / / w w w . h





ystem

OR!

satGenerator

y10poundsofpressureapplied.Toad-

ocknutonthegeneratorbelt adjustment

clockwisetoloosenthebeltsand clock-

ghten thelocknutaftertheadjustment

92).Turnoff 24-voltmasterswitch.

ratorterminalshieldbase.Disconnectthe

als,andremovegroundwirefromgenerator

d.Loosentheconduitcouplingnutand

eldbase.Removeright-and left-hand

neratorcradlestrapclampscrews.Loosen

jamnutandlowergeneratorbybacking

generatordrivebelts canbeliftedoff

rwithropesling,removeadjustingscrew,

d192).Position thegeneratorin

ebeltsongenerator,and installcradlestrap

eldandarmatureleadsin theterminal

hemtothegenerator.Tightenthe conduit

ardshield.Install thegeneratorter-


/ h t t p : / / w w w . h





nstruciions

ERATORREGULATOR-

RMINALHOUSING

atGeneratorRegulator

drivebeltsto Vi-inchfreeplay(subpar.

enerator.Makeproperentryon

8,"MWOandMajorUnitAssemblyRe-

TOR.

torregulator(fig.193),mountedon

-unittype.Thisincludesavoltageregu-

dareverse-currentrelay,orcut-out.The

ntainstheoutputofthe generatoratacon-

geof30volts.Thecurrentlimitatorauto-

tofthegeneratorin accordancewiththe

ryand theamountofcurrentbeingused

erefore,theproperchargeisdeliveredto

thoutdangerofovercharging.Thecurrent

ximumcurrentoutputof thegenerator

e-currentrelay,orcut-out,preventsthe

hroughthegeneratorwhenthegenerator

developingitsnormalvoltage.Thedotted

ternatepositionofgroundstrap.


/ h t t p : / / w w w . h





hebatterygroundcableatthebattery.

singcover.Disconnectallwiresfromthe

ovetheconduitconnectionandwiresfrom

ovethefourstudnutswhichhold the

dremovetheregulatorand bondstraps.

3.

d193).To installtheregulator,fasten

ewiththe studsandstudnuts,making

strapsundertheregulatoras theywere

conduitandwiresto theregulatorter-

erminalhousingcover.Connectthebat-

egulator.Recordthereplacement

G.O.FormNo.478,"MWOandMajor

entRecord."

terismountedintheleft centersec-

el(fig. 12).Itindicatestherateof charge

ythe generator,orshowsdischargewhen

ththe lightsorotherelectricalunitsin

oltmasterswitch.Removetheinstru-

r.186d).Removescrewsfromplug-in

eammeterandmovereceptacletooneside.

meter(fig.204).Removenutsandtoothed

ermountingstuds;removebracketsand

ceofinstrumentpanelfromtherear.

meteragainstinstrumentpanelface.

ers,andnutsonammetermountingstuds.

rterminalsasshowninfigure204. Install

heammeter.Installinstrumentpanelcase

ORN

m(fig.194).Thevehiclelightingsys-

headlightswithblackoutmarkerlights,

blackoutmarkerlight,serviceandblack-

ntlights,instrumentpanellamps,andthe

andconduitconnectingtheseunitsinthe


/ h t t p : / / w w w . h





Instructiani

ornSystemDiagram


/ h t t p : / / w w w . h




AININGSCREW

ndHorn

ghtsarecontrolledbythe mainlight

anelandare protectedfromanoverload

instrumentpanelmarked"LIGHTS."Cur-

htis passedthrougharesistor,locatedon

einstrumentpanel,whichreducesthe volt-

ckoutdrivinglight to6volts.Thecom-

ledbyaswitchmountedon eachlight

uitbreakerin theinstrumentpanelmarked

Thehorn isbracketmountedunder

lightandisconnectedbyflexibleconduit

ulltoapush buttonswitchmountedonthe


/ h t t p : / / w w w . h




»tructions

Disassembled

rnoperateson 24volts,andtheswitch

mthe instrumentpanelthroughthefront

hetwoheadlightsarethe sealed-

ckoutmarkerlightsaremountedontopof

ghtsareinsertedintomountsin thehull,

wandratchettypelockingpinlocatedbe-

fig.205).With theheadlightsinstalled,

mpsorthe blackoutmarkerlampsmaybe

edforinstallationinto theheadlight

ketsfromdirtand moisturewhenheadlights

ghtLamp-unit(fig.196).Remove

eadlightdoor.Pull dooroutofbottom


/ h t t p : / / w w w . h





vingtight

ombackof lamp-unit.Unhookretainer

the mountingring.Liftoutmounting

all,placelamp-unitin headlightdoor

p.Securewithmountingring andspring.

backoflamp-unit.Install headlightdoor.

utMarkerLamp(fig.196).Remove

blackoutmarkerlightdoor.Lift offdoor.

ounterclockwiseandpullout.To install,

essin,and turnclockwise.Hooklipontop

dy,pressdoor intoposition,andinstall

ghtAssembly.Unscrewheadlight

tassemblyupandout.To install,insert

ountinhull(fig. 195)andsecurewith


/ h t t p : / / w w w . h





Instructions

vingLightResistor— CoverRemoved

LIGHT.

heblackoutdrivinglightis designed

lightsocketonly.Adiffusedbeamoflight

portionofthelens.Ahood overthetop

tyof thelightraysfromabove.Thelamp-

e.Ablackoutmarkerlightismounted

unit.Seeparagraph178b.

DrivingLightAssembly(fig.197).

embly(par.178b)andinsert blackout

hull.Securewithretainingpinin driver's


/ h t t p : / / w w w . h





ER

stalled

LIGHTRESISTOR.

utdrivinglightresistoris mounted

theinstrumentpanel(figs.198and 205).

ucethecurrentintheblackoutdrivinglight

o 6volts,sincealowcandlepowerlamp

nstrumentpanelasanassembly(par.

andwashersfrombottomof resistorre-

nfromcoverand resistor.Removethe

chresistorcovertomountingplateand

eresistorfromthe housinganddiscon-

fromtheresistor(fig.198).

os.47and48wiresto terminalson

198.Positionresistoronmountingplate

apscrewsand lockwashers.Insertre-

washersand cotterpin.Installinstru-

lightsaremountedatthe toprear


/ h t t p : / / w w w . h





Ittfltructions

WASHER

PD343078

partmentLight— CoverRemoved

taillightcontainsaserviceandblackout

illightcontainsablackoutunitonly.

units.

AMP-UNIT.Removedoorretaining

dlift offdoor.Pullupperlamp-unitout

g.Toinstall, insertlamp-unitintosocket

AMP-UNIT.Removedoorretaining

lowerlamp-unitoutofsocket.Toin-

ocketandinstall door.

embly(fig.199).Removecapscrews

tachtaillighttohull.Lift uptaillightas-

edconduitretainingnut.Pullsocketout

ssembly(fig.199).Insert socket

ndsecurebyinstallingknurledconduit

blyintoopeningin hull,andinstalllock

MENTLIGHT.

nelightis usedtoilluminatethe

securedtothehull topplatenearthe

nthetwodrivers.Anauxiliarysocketis

rovidefor connectionofanauxiliarylight.


/ h t t p : / / w w w . h





Removethelightcoverattaching

r.Pressi nonthelamp,turn counterclock-

, placethelampinthe socket,pressin,

onthecoverandinstalltheattaching

rtmentLightAssembly.Remove

ar.babove).Disconnectwiresatthe

seidentify.Disconnecttheconduitatthe

ngscrewsandliftoffthe lightbody.To

dyand installthemountingscrews.Con-

minals(fig.194) andattachtheconduit.

par.babove).

LIGHTS.

mentPanelLamps.Theinstrument

ehindthecoverplugson theinstrument

removetheplugs,push thelampin,turn

pullitoutofits socket.Toinstall,placethe

n,and turnclockwiseuntilitlocksinto

thecoverplugs.

mentPanelLight.Thefourpanel

movedfromtheinstrumentpanelfaceplate,

pot-weldedtothefaceplate.Theonlyop-

rmedistheremovaland installationof

ve).Panellampsareglare-shieldedwith

nnotberemoved.

mentPanelLightSwitch.Remove

randpull leveroffshaft.Removelock

her,andswitchleverpositionplate.'Dis-

als.Liftoutswitchandflatspacer.To

aceronthreadedcollarofswitch.Insert

ngsuredowelonswitchis seatedindowel

all switchleverpositionplate,seating

chdowelpin.Installinternal-toothed

switchshaftfull totheleftto "OFF."

t,withpointer onshaftat"OFF."Install

rinlever.Test operationofleverthrough

wireto terminal"B."ConnectNos.52

erminal.NOTE:Keyonlockwasherfits

estoperationofswitch.

mountedonthe hulladjacenttothe

soperatedbythehornswitchon the

ever(fig.201).Acircuitbreakerin the

thesystemintheevent ofashortcircuit.


/ h t t p : / / w w w . h





nstructions

— CoverRemoved

gs.194and201).Makesure24-volt

.Unscrewconduitcouplingnutfrom

rplatefrombackofswitch.Disconnectthe

,andremovewiresandconduit.Remove

pull switchoffsteeringlever.Toinstall

tchonthesteering leverandinstallthe

nectwirestotheswitchandtightenthe

24-voltmasterswitchonandoperate

nstallthe switchcoverplate.

ent(figs.194and195).Disconnect

einsideof thehull,whichleadsfromthe

fromthe bulletconnection.Removethe

ethehornto thehornbracket.Remove

theoutsideofthe hull,andliftoffthe


/ h t t p : / / w w w . h





ehorn tothehullwith twocapscrews.

ornthroughthecouplinginthe hulland

ull. Tightenthecouplingontheoutside

bulletconnectiontothehorn wireonthe

th endsofthebulletconnectionto-

uitcouplings.

esareshieldedin rigidtubingand

protectthewiringagainstwear,abrasion,

ofthe harnessesareadaptedtothe

hichtheharnessesareused.Multiple pin

erminal-posttypeconnectionsareused

bondedtothehullby clampsorclipsat

ortandtominimizeradio interference.

tire vehicleisshowninfigure202.The

agramisshownin figure204.NOTE:All

espondwiththewiring diagrams.How-

nd theirattachingpointsatthetimeof

nstallationandlimit thenecessityofcon-

gdiagrams.CAUTION:Turnoffthe12-

esbeforeattemptinganyrepairstoterminal

.

ance.Inspectthewiringsystemfor

gconduit,damagedinsulation,dirtyorcor-

nnections.Efficientfunctioningofelectri-

radioi nterferencedependsuponproper

n,tightterminalsand couplingnuts.Use

osionfromconduitconnectionsandterminal

anywireshavingdamagedinsulationor

onduit.Turn24-voltmasterswitch

airstothe wiringsystem.Beforediscon-

ircuit,fastena tagtotheterminalpost

henumberofwires,size, andcolorofthe

endis connected.Disconnecttheconduit

dwires.Removebracketsorclipswhich

eofstrongtwineto theendofeachwire

romtheconduit.Thetwinecanalso be

thsthrougha dirtybutotherwiseservice-


/ h t t p : / / w w w . h





-^

R,'-;

WITCH!'

CHTRIGGER


/ h t t p : / / w w w . h





ONTROLBOX

Y


/ h t t p : / / w w w . h





Instructions


/ h t t p : / / w w w . h





/ h t t p : / / w w w . h





nstructiom


/ h t t p : / / w w w . h





Conduit.Use onlywireofthesame

removed.Thewiremaybepulledthrough

e heavytwineleftintheconduitwhen

hdrawn.Cleanterminalpostsandwire

nganywireintoitscircuit.Connectwires

wiringdiagram(fig.202),andtighten ter-

couplingssecurely.Replaceconduitin

forthispurpose.

.

nanduseofthe variousinstruments,

heinstrumentpanelfaceplateisgivenin

dinstallationproceduresforthevarious

dcontrolswhichareapartofa systemare

ngthatsystem.Theremovaland installa-

struments,switches,andcontrols,notpart

thefollowingsubparagraphs.Withthe

ntpanellamps,highwatertemperature,

t isfirstnecessarytoremovetheinstru-

mthecaseas instructedinsubparagraphd

hereplacementoftheunitasdescribedin

phs,installthecasecoveraccordingtopro-

below.Testoperationofunit replacedto

areproperlymadeandunit operatescor-

Panel(fig.205).Unscrewcoupling

ndtachometerflexibleshafts,andpullshafts

ug-inreceptaclecouplingringsandpull

sockets.Removethethreescrewsand

neltothe sponsonandremovethepanel.

tPanel.Positiontheinstrument

nstall attachingscrewsandwashers.In-

esintheir socketsandtightencoupling

eterandtachometerflexibleshaftsto

couplingrings.

PanelCaseCover.Theinstrument

movedfromtheinstrumentpanelcase

tpanelis mountedinthevehicleorafter

movetheinstrumentpanel casecover,

h.Fromtherear,disconnectthefour

enginetachometershafts,andthe speed-

ntofthe casecover,removethesix

overtothecase.Liftcoverfromcase,

ubbergasketon case.


/ h t t p : / / w w w . h





nstrurtion»

SHAFT

LIGHT

T

FT

GPIN

anelConnections

tPanelCaseCover.Installnew

essary.Positioncoverin case.Install

securely.Removetagsandconnectthe

left enginetachometershafts,andthe

onbatterymasterswitch,andtestopera-

andlights.

sconnectNos.23and 85wiresfrom

kerterminals.DisconnectNo.50wire

breaker.DisconnectNos.51and69

RIES"circuitbreaker.DisconnectNo.58

uitbreaker.DisconnectthetwoNo.65

fromthe"INSTRUMENTS"circuit

ectNos.9and219wiresandthe two

busbarterminalatthe endofthebus

ENTS"circuitbreakerterminal.Dis-


/ h t t p : / / w w w . h





hefour circuitbreakerterminals

S,""HORN,"and"INSTRUMENTS")

emovenutsandlockwashersfromface-

breakerassemblyoffstuds. Inspectrub-

gasketif ingoodcondition.

erFromMountingPlate.Removein-

r(subpar.dabove).Removethetwo

ocknutswhichattachthecircuitbreaker

circuitbreakeroffplate.

4).

newrubbergasketif necessary.

semblyonfaceplatestuds.Installstud

tallNo.23 wireoninsideterminalofair

dconnectNo.85wiretothe outsideter-

ontheinsideterminalsof thefour

LIGHTS,""ACCESSORIES,""HORN,"

nnectNos.9and219 wiresandthetwo

thebusbar. ConnectNo.50wiretothe

GHTS"circuitbreaker.ConnectNos.51

eterminalofthe"ACCESSORIES"circuit

iretotheoutsideterminalof the"HORN"

o.60wireandthetwoNo. 65wiresto

"INSTRUMENTS"circuitbreaker.

nMountingPlate.Positioncircuit

e.Positionnutsandlocknuts.Install

securely.Installcircuitbreakerassembly

ecover(subpar.eabove).

nofAccessoryOutlet.Theaccessory

fromtheinstrumentpanelcasecoverplates

edtothe casecover.

casecover(subpar.d above).

rewknobfromshaft.Removethelock

nleft-handswitchdisconnectthetwo

innerterminaldisconnectNo.22wirei

nthe right-handswitch,disconnectthe

nnerterminaldisconnecttheNo.222

ecoverandremoveinternal-toothed

nternal-toothedwasheronswitch

casecover.Besure curvedsideofswitch

asecoverand flatonshaftis linedup

thecover.Installlocknut, knob,and

obsoarrowpointsto "OFF"andtighten


/ h t t p : / / w w w . h





eInslructiont

witchconnecttwoNo.85wirestothe

wire totheinnerterminal.(Onright-

5wiretoouter terminalandNo.222wire

l thecasecover(subpar.eabove).)

casecover(subpar.d above).Dis-

ccessoryoutletterminal.Removenut

acitorandclamp.

etheremovalproceduredescribedin

ase cover(subpar.eabove).

ALBOX.

minalboxis attachedtotheupper

compartmentlightandassistantdriver's

s providedfortheradiosetwhichis

sponson.Conduitsleadintotheboxfrom

fromthe collectorring(fig.202).

oltmasterswitch.Removeterminal

esfromterminalsandconduitsfrombox

ntification.Pullwiresclear ofbox.

glocknutsandpull thfewiringfromthe

whichattachboxtoupperhullplateand

ioterminalboxonupperhull plate

ws.Leadconduitwiringintoterminalbox

obox.Individuallyremovetagsfrom

retoits correctterminalastagisremoved.

onnections.Installthecover.

ENTTERMINALBOXES.

alboxesareprovidedintheengine

easdistributionpoints.Theyaredesignated

dleft enginecompartmentterminalboxes

re mountednearthebulkheadonthe

oltmasterbatteryswitch.Elevate

degreesrightorleft.Openenginecom-

andlocksplashpanel (fig.233).Remove

nnectwiresfromterminalsanddisconnect

esforinstallationidentificationandpull

inalboxattachingscrewsandliftboxoff

minalboxonsponsoncoverplateand

eadwiresintoboxandattachconduitsto


/ h t t p : / / w w w . h





rminalBox— CoverRemoved

ectterminals(figs.207and208),ac-

gs.Removetags.Checkwiringbyre-

gram(fig.202).I nstallterminalbox

andcloseenginecompartmentdoors.

hebatteryboxis mountedintheleft

tmentbeneaththesubfloor(fig.189).The

o12-voltbatterieswhicharejoined to-

scable.Thebattery boxtopcover

ccessto batteriesandconnections.

4-voltmasterswitchesto"OFF"

andremovetopcover.Removebat-


/ h t t p : / / w w w . h





eInstruction*

partment,RightTerminalBox

2c).Detachtube fromoutboardsideof

ratorregulatorbracketfromrearendof

mountingscrewsandliftboxfromsponson.

teryboxinsponsonandinstall attach-

torregulatortorearendof batterybox.

deofbatterybox.I nstallthebatteries

box topcover.


/ h t t p : / / w w w . h





D

partment,LeftTerminalBox— CoverRemoved


/ h t t p : / / w w w . h





nstructions

STRUMENT

EL

TOHORNSWITCHRAPD343098

emTerminalBox— CoverRemoved

X.

rswitchboxismountedona frame

.190). Itcontainsthe12-and24-volt

abatterychargingreceptacle,generatorcir-

ntlightandfancircuitbreaker,andthe

terswitchboxcover.Removebolts

chboxto switchboxsupportandpull

anbe disconnectedfromfittings.Dis-

rswitches,pulloutwires,and remove

ovemasterswitches,refertopara-

masterswitches(par.173d).Lead

(fig.190) andattachconduitstobox.In-


/ h t t p : / / w w w . h





3105

BoxConnections

tsthrough boxandsupport.Connectall

90 and202,andinstallmasterswitchbox

RMINALBOX.

gsystemterminalboxismountedto

trolsneartheinstrumentpanel(fig.209).

onforthe wiringwhichleadstothe

koutmarkerlights,hornandhornswitch,

panelreceptacle.

oltmasterswitch.Removeterminal

wiringfromterminalblock.Unscrew

bleand wiringfrombox.Removebox


/ h t t p : / / w w w . h





Instructions

hedlockwashers,andliftboxfrommounting

xonmountingplateandinstall washers

oughboxopeningsandconnecttoter-

09. Tightencablelocknutsandinstall

OX.

rcontrolboxis mountedontheturret

motor.Itcontainsthetraversemotorswitch

witchandcircuitbreaker,compartment

rcuitbreaker,accessoryoutlet,andfiring

02).

2-and24-voltmaster switches.Re-

randpullit outawayfromthebox.Dis-

omtheboxand cover,andremovethe

tsfromfittingsandpullthewiresfromthe

gscrewsandliftoffthebox.

tchboxonturretbasketandinstall

iresintheproperopenings,attachcon-

sshowninfigure 202.Installtheswitch

tsby operatingtheunits.

X.

orringassemblyisagroup ofrings,

ntainedwithinadustproofhousing.The

mblyrevolveswiththeturretbasketand

.Boththe12-and24-voltcircuitsare

ctorringtothe turretswitchbox.The

rrythe 12-voltcurrentfortheradioand

owerringsandbrushescarrythe24-volt

rsingsystem.

masterswitches.Removethefour

romthecollectorringcap,andremovethe

knurledthumbscrewsatbaseofcover

210).Disconnectthewiresleadingto

connectthe24-voltcableleadingtothe

ectorring terminal.Disconnectthecon-

hattachthecollectorringto theturret

sfromcollectorringguidelugsanddis-

Lifttheassemblyandloosenthe two

chsecurethebottomcover.Disconnect

nscrewconduitlocknut.Disconnectthe

erminalsand unscrewconduitlocknut.

.


/ h t t p : / / w w w . h





line conduitwithwiresupthrough

rtmentfloor.Connectthe24-voltwirein

stallthe12-voltfeedwire throughopen-

ousingand attachtoterminalposts.Do

tsuntilcollectorringis mountedinplace.

dtightenthumbscrews.Positionthecol-

and installmountingbolts.Installthe

onduitlocknuts.Installthe 24-volt

oxandconnecttoterminal.Insert thefive

fittingincollectorring boxandconnect

gure 202.Connecttheconduit,installcol-

ghtenthumbscrews.Installcollectorring

wardfrontofvehicle.Turnon master

etelectricalequipmenttotestcollectorring

istsofa 1-piececastingofarmorsteel

eelturrettop (fig.225).Anextended

stowagecompartmentandalsoactsasa

mmgun.Theturretis supportedonthe

aringrace.Theupperracering isattached

rraceringis anchoredtothehull.Aball

lowerringandformstheretainer forthe

aybe rotatedtotherightor leftthrough

hydraulicorhandtraversingmechanism

e lockedinpositionbymeansofthe

SINGMECHANISM.

lictraversingmechanismincludesthe

sthehydraulicpump,thecontrolvalve,

oir,andtubes(fig.211).Oil fromthe

pressuretothe controlvalvebythe

heelectricmotor.Thevalvecontrols

fflowof theoiltothe hydraulicmotoron

chanism.Thehydraulicmotoriscoupled

echanismbytheactionofthe shiftlever,

driving themanualtraversingmechanism.

motoris returnedtothereservoir.


/ h t t p : / / w w w . h





nltruttioix


/ h t t p : / / w w w . h





/ h t t p : / / w w w . h





eImtrucfion»

reReliefValveParts

versingMechanism.Thehydraulic

lbeservicedandinspectedatregularin-

34and accordingtoinstructionsinthe

vicingthesystem,everyprecautionmust

rforeignmatterfromenteringthesystem

aulicoil.

SERVOIR.Checkoillevelandcon-

tside ofreservoir.Maintainoillevelat

LRESERVOIR.Whenoilbecomesdis-

r^ng.212).Wipeoffoutsideand bottom

containerofsuitablecapacityunder

eatNo.13port(fig.211) atbottomof

odraindry.Connecttubeandtighten

ESERVOIR(fig.212).Cleantopof

pandpour4quarts ofhydraulicoilinto

pgasketandinstallnewgasketas required.

echanismforseveral30-secondintervals

ep(1) above).Addhydraulicoilasre-

wo-thirdsfull.

RERELIEFVALVE(figs.212and213).

ainerunderreservoir.Removehigh-

arkedNo.1.Liftout gasket,shims(if


/ h t t p : / / w w w . h





mpReliefValveParts

espring,andplunger.Cleanallparts

solvent.Examinevalveplungerseatfor

kness.Turntraversingcontrolhandleall

olditin thisposition.Turntraversing

enoughto forcesufficientoilfromvalve

tany foreignmatter.Turnswitchoffand

valvepartsbyinsertingspringguideinto

sideof guidedownagainstbottomofre-

neron topofspringguide.NOTE:

ghasfewercoilsof heavierwirethanthe

shims wereused,placetheminthecap.

o thevalveseatbushing;theninstallthe

wgasketoncap.Tightenthecapsecurely.

ecleaned,donotfill reservoiruntilvalve

eturretlockandtestoperationof mecha-

MPRELIEFVALVE.Removeand

yfollowingprocedurein step(4)above.

pringhasmorecoilsof smallerwirethan

g.Installpartsin theordershowninfig-

em.Releaseturretlockandtest opera-

MPPILOTVALVE.Locktheturret

wn.Removelockingwireandunscrew


/ h t t p : / / w w w . h





eInstructions

ydraulicPumpPilotValve

spring,andplungerout (fig.215).If

easily,pushlightlyonendwith bluntin-

erwhileturning controlhandletothe

housing.Thenturnhandle totheright

peatasrequiredtowork plungeroutof

ainerundervalveopeningandsnap

nandoffquicklyseveraltimesto flushthe

oughlycleanthepartsremovedindry

ringonplungerandinstallvalvecap,

capandsecurelockingwire(fig.217).

ecklevelofhydraulicoil(step (1)above).

ctraversingmechanism.

MPCHECKVALVES.Locktheturret.

checkvalvecap.Placeclothtocatchoil

apandgasket(fig.216).Liftoutspring

roughlycleanallpartsremovedindry

eallpartsforscoresandcleanthe valve

alveand springinbodyand install

htencapandsecurewithlockingwire.

ervalve.Checkoillevel(step(1)above).

stoperationoftraversingmechanism.


/ h t t p : / / w w w . h





draulicPumpCheckValve

NDLEPOSITION.Loosenthesocket

deof handleframe(fig.217).Remove

adjustingscrewsattop ofhandleframe.

shaftandbase ofhandleframetocheck

leasadjustmentis made.Turntravers-

otoron,andplaceshiftleverin power

tcreepstothe right,loosentheright

ntheleftadjustingscrewan equalamount.

ontrolhandleinreleasedposition.Repeat

stopturret fromcreeping.Tightenboth

rewithlockingwire.Tightenthehandle

pstothe left,followthesameprocedure

rewandtighten therightadjustingscrew.

aversingMechanismPump.The

hanismpumpcanberemovedfromthe

movingthemotor(fig.218).Drainthe


/ h t t p : / / w w w . h





p— RearView


/ h t t p : / / w w w . h





aversePumponElectricMotor

b(2)above;.Disc.ectoiltubes from

ewswhichattachtraversecontrolhandle

bleclampscrewsatbaseofhandle,and

movelockingwire,andremovecapscrews

tricmotor,whilesupportingpump.Care-

til driveshaftisclear.

TraversingMechanismPump.In-

motorarmatureshaft.Alinegroovein

ueonbrass coupling,andattachpumpto

.218).Tightencapscrewsalternately

re.Placecontrolhandleonframeand

chingscrews.Connectoiltubesto pump

erately.Filloil reservoir(subpar.b(3)

smandinspectallconnectionsforleaks.

aversingMechanismHydraulic

ctoiltubesfromhydraulicmotor.Tape


/ h t t p : / / w w w . h





eInstructiont

versingMotorandGearBoxAdapter

enutsfromstuds whichattachadapterto

motorandadapteras aunit.

TraversingMechanismHydraulic

nstudsongear box.Rotateadaptershaft

nd slideadapterandmotorassembly

e castellatedsafetynutsandtighten

asketuniformly.Connectoiltubestomotor

raulicsystem(subpar.b(3) above).

nspectforleaks.

aversingMechanismReservoir.

system(subpar.b(2)above).Discon-

ir(fig.211) andtapeendsoftubes.Sup-

nutsandbolts whichattachittobracket.

TraversingMechanismReservoir.

ketandinstalltheattachingbolts andnuts.

rfittings(fig. 211)andtightenfittings

ench.Fillreservoir(subpar.b(3)above).

ingmechanismandcheckforleaks.


/ h t t p : / / w w w . h





ectricTraverseMotorandPump

ansfertheoil fromtheoilreservoirto

aversepumptothe traversemotor,and

totraversepumpanddrain tubes,into

typefittingsareusedand,if properly

llnotrequireretightening.Alltubes must

ctport;otherwise,thesystemwillnot func-

berstampednearittoindicatetubeto

tingnuts shouldbedrawnupsecurely

hwhentightening,asabnormaltightening

khandletolockposition,and trav-

"position.Drainreservoirintoa clean

gtubeatportmarked"13"onthe bottom

(2)).If oilisto beusedagain,cover

nd foreignmatter.Disconnectthetubes,

htubewithnumberofport fromwhichit

thefittingandendoftube.Covertube

esinposition,checkingtheinstalla-

tags todeterminecorrectconnections.

fendoftubes andfittingstobesure no

Examinealltubesandfittingscarefully.

damaged,replacewithanewtubeof

ends ofnewtubesquare,andremoveall

,andfitting. Placenutandringover

gfacingnut.Presstubefirmlyinto fitting

illoil reservoirwithhydraulicoil(par.


/ h t t p : / / w w w . h





eIntlructions

eshiftleverinmanualcontrolposition

itchto"ON"and "OFF"positionsseveral

eliveroilthroughoutsystembeforeoper-

Checkoillevelandrefillwithhydraulic

ppreciably,cleanallunitsandcheckfor

%-horsepowerelectricmotorfurnishes

rret traversingmechanism(fig.220).The

acketinfrontofthegunner'sstation andis

raversinghydraulicpump.

motorcanberemovedfromthetrav-

nlywhenthemotorandpumphave been

ngbracketasaunit(fig. 220).

OTORANDPUMP.Turnturretlock

ndtraversemotorswitchto"OFF"posi-

r.195 b(2)).Disconnecttubesat

ubesandfittings,andcoverends with

preventdirt fromgettingintosystem.

ontrolhandle.Loosenconduitcouplingnut,

nddisconnectlead-inwireatleftendof

efourcapscrewsatbottomofmotorand

ssembly(fig.220).NOTE:Sincepump

vy,aropesling maybeusedtoadvantagein

acket.

OTORFROMPUMP.Removelocking

wsattachingmotorto pump.Liftpump

ng(fig.218).

asscouplingin placeonthearmature

pdriveshaft(fig. 217)sothatit will

coupling.Lowerpumpintoplaceon

hefour capscrewsandlockingwire.

otorand anchorropetotopofturret

dintoplaceonmountingbracket.Line

ketwitha punch,andinstallandtightenthe

washers.Connecttheelectriclead-inwire

d ofmotor,installterminalcover,and

Connectoiltubestopump,beingsure that

operport(fig.211). Filloilreservoir

versepumpcontrolhandle(par 195d).

omanualcontrolposition.Turntraverse

ositionandchecksystemforoil leaks.


/ h t t p : / / w w w . h





GHT

H

|R|NG

CH

G

FiringSystem

WITCH.

masterswitches.Removecontrol

over outforaccessto wiring(fig.221).

ckwashers,switchplate,andrubberboot

ver (fig.251).Disconnectthebusbar

withwireattached.Disconnectthe traverse

akerconnectingwire.Removetheswitch

ch.

traversemotorswitchin turretcon-

g screws.Installswitchfaceplatewith

retcontrolboxandtightenmountingbolts.

nnectingwireandtraversemotorcable


/ h t t p : / / w w w . h





eInstructions

ESHOE

TraversingBrake

breakerbusbarandinstall capacitor.

urnonthe masterswitchesandtest

otorswitch.

MECHANISM.

aversingmechanismconsistsofthe

on,andmanualdrivewithbrake(fig. 250).

geartrain whichtransmitsthepowerfrom

nualdrive,throughtheactionof thetrav-

vepinionwhichengagestheturretring

quippedwitha 2-shoeexpandingbrake

akelever atthesideof thebrakehandle.

raulictraversingmechanismhydraulic

9)fromthe handtraversingmechanism

Ifthe motordoesnotneedtobe removed,

motorandproceedasfollows:Remove

hetwocapscrewsandsplit washerswhich

turretflange.Removecapscrewandgun-

pportthemechanismandremovethecap

boxtotopof turretflange.Liftmechanism

shims,if used,andsaveforinstallation.


/ h t t p : / / w w w . h





In.tructions

ONTROLHANDLE

ERSESHIFTLEVERTURRETLOCKRAPD339613

erseControlHandleandTurretLock

firing circuitisclosedand thesolenoid

foot-operatedfiringpedal,locatedonthe

unner'sstation(fig.221),is usedtofire

systemfails.

h.

oscrewsfromcapat thebaseofthe

thehandlemountingscrewsandlift the

cket.Removethescrewatthe topofthe

exiblespringon theconduit.Pull the

dwiresattached,out ofthehandlefar

erminals.Removeterminalscrews,pull

movethegunfiring handle.

hewiresinto thehandleandconnect

ls.Tightenthe terminalscrewssecurely.

andleandpositionthe assemblyonthe

lemountingscrewsandinstallthe cap

ebase ofthehandle.Operatetrigger

un firingsolenoidisin workingorder.

makesuregun isnotloadedbefore

.

oid.

24-volt masterswitch.Remove

solenoidtobracket.Removeclampscrew

eand removecablefromsolenoid.Re-

itboxcover,unscrewconduit locknut,and


/ h t t p : / / w w w . h





FiringSolenoid

disconnectwirefromsolenoid(fig.224).

cover,andremovethesolenoid.

etthewireto relayterminal,install

conduitlocknut.Installpush-pullcable

mpscrew.Positionsolenoidonthe gun

wsandlocknuts.

voltmasterswitch.Removeturret

gscrewsandpullcoveraside.Disconnect


/ h t t p : / / w w w . h





ructioni

to gunfiringtriggerswitchandsolenoid

estofiringindicatorlightand circuit

mountingscrewsfromfaceofturretswitch

nfiringswitch.

ongunfiringswitchonturretswitch

chingscrews.Connectwirestoswitchas

n 24-voltmasterswitchandtestopera-

ndcircuitbyoperatingthetriggerswitchon

handle(fig.223).CAUTION:Openthe

thechamberis emptybeforeoperating

l).

mpscrewandnutfrompush-pull

ovecablefromsolenoid.Removeboltand

eservoirbracket.Removefourscrews

baseto turretplatform(figs.221and

able.

etheremovalprocedureandtest

le.

ularmetalplatform,orhalf-basket,is

deof theturret(fig.250).Thebasket

providesaplatformforthecommander

tone-halfofthe turretfloorarea,per-

mammunitionstowagecompartments.Ad-

manderandgunneraremountedon frames

ith theturret.Aturrettraversinglockis

acering attherightof thegunner

mmander'sseatisthepad-type,ad-

ybe foldeddownoutoftheway(fig. 244)

whennot inuse.Thegunner'sseat,which

bleback,canberaised orloweredandad-

er'sseat(fig.245)is thesameconstruc-

eatandis demountable.

pscrewswhichattachthegunner's

retplatform.Releasebackrestlocking

up,andliftcommander'sseatfromframes.

eningintopofturret. Removecapscrews

seatbrackettoupperracering andremove


/ h t t p : / / w w w . h





ropeslingaroundgunner'sseatframe

rret.Alineholesin framebracketwith

capscrews,andtightensecurely.Install

ersingremovalprocedureoutlinedinstep(2)

r'sseat,placesupportingring inplace

washersandcapscrews,andtighten

ettraversinglockincorporatesapawl

ethofthe turretringgearto holdtheturret

din engagementbyaspringandis dis-

ndleto theright,pullingitout, andturning

nthetravelinglock.Disengagethe

ckingwireandattachingscrews(fig.

turret ring.

ockassemblyinpositionand tighten

wire(fig.223).NOTE:Shouldlock

benecessarytoplaceshimsbetweenthe

ring.

NG.

paddingisinstalledonthebaseof

eventinjuryto theloader'shandwhen

wocapscrews,whichattachpadding

se,andlift offpadding.

paddingonturretbase.I nstallcap

ghtensecurely.

25).An armoredsteelturrettopis

htingcompartmenttoprovideprotection

t topconsistsofthefrontsection(A,

top doorsandhingedvisiondoors,and

insthetop doorlatches.Thefrontsec-

rimat thefightingfrontofthe turret.

isfastenedtotheturret rimbymeans

shers.Whenclosed,theturrettop doors

geandareheld inplacebythreefixed

sareopen,alatchmountedon thefront

nposition.Thevisiondoorsare located

efightingcompartmentandareequipped


/ h t t p : / / w w w . h





eInstructions

TINGBOLTS

Installed


/ h t t p : / / w w w . h





ession

ttoprovidenecessaryvisionand,at the

ssiles.

TopDoors(fig.225).Unlatchall

atches.Removeouterdoorhingepinsand

ecenterdoorhingepins andliftoffcenter

tingcenterdoorand installingcenter

installtheouterdoorsand hingepins.

earshieldlatches.

sa Unit.

DOORS(A,fig.225).Refertosub-

D(B,fig.225).Removecapscrews

ecureshieldatrearof turret,andliftoff

ION(A,fig.225).Removenutsand

ngbolts.Removemountingboltsanduse

ftfrontsectionfromturret.

as aUnit.

ON(A,fig.225).Positionfrontsec-

retandinstallmountingbolts,lockwashers,

(B,fig.225).Positionshieldontur-

ckwashersand capscrews.

DOORS(A,fig.225).Refertosub-

PPRESSION

encesuppressionistheeliminationor

ldisturbanceswhichinterferewithradio

ocationofthevehicleto sensitiveelectrical

herefore,thatallvehicleswith,as well

sbesuppressedproperlytopreventinter-

onofneighboringvehicles.

uppressioninthisvehicleis accom-

dstrapsandtoothedwashers,resistor-sup-

pacitors),andfiltersinallcircuitsorsys-

resandunits doesnotcompletelyconfine


/ h t t p : / / w w w . h





Instructions

apacitorInstalledinFilterCase

rbanceswhichwouldotherwisecauseradio

nunitsusedinspecificassembliesorunits

ow:

RYANDMAIN).OneFL-19filteris

eregulator(figs.226 and227)andcon-

achregulatorandthebattery(one used).

untedfromregulatortothe regulator

ed).

.One0.25-microfaradcapacitoris

nnectedfromeachpositivebrushtoground

ator(twoused).The maingenerator

omthegeneratorhousingtothehull, also

radiosuppression.


/ h t t p : / / w w w . h





ession

ter— Installed

g.229).One0.5-microfaradcapaci-

nstrumentpanelandconnectedtothe

esockettoground.

LBox.Two0.1-microfaradcapacitors

dioterminalbox.Oneisconnectedtothe

donetothe 24-voltsupplyterminal.

NALBox(fig.231).One0.1-micro-

dintheturret radioterminalbox,connected

nal.

x(fig.253).One0.1-microfaradca-

rret controlboxandisconnectedtothe

ngmotorswitch(0.25-mfdor0.1-mfd

MOTOR(fig.230).Two0.1-microfarad

ternallyonthetraversingmotorframeand

sitivebrush.

OR(figs.19and235).Two 0.25-micro-

tedongeneratorhousing,oneconnected

eneratorbrush.Onebondingjumperis


/ h t t p : / / w w w . h





ession

anelCapacitor

OutletCapacitor.

rumentpanelcasecover(par.186d)

r.Disconnectcapacitorleadfromacces-

ovecapacitorbyunscrewingmounting

enewcapacitorinplacewithmounting

washerunderheadofscrew.Connectca-

outletterminal.Installinstrumentpanel

connectspeedometerandtachometer

Capacitors.

owindshieldwipermotorattaching


/ h t t p : / / w w w . h





Instructions


/ h t t p : / / w w w . h





ession

CORD

BOXCORD

TerminalBox— CoverRemoved


/ h t t p : / / w w w . h





nstructions

Disconnectcapacitorleadfrompositive

utconduitshieldfromcapacitorclamp

rtheconduitshieldtocapacitorclamp

ectcapacitorleadtowipermotorpositive

orandwipermotoragainstwindshield

glockwashersandcapscrews.

ONESYSTEM.

TerminalBoxCapacitor(figs.231

minalboxcoverretainingscrewsand

ecover.Disconnectcapacitorleadof

omterminalblock.Removecapacitor

edlockwasher,andremovecapacitorfrom

enewcapacitorandplaceinterminal

usingtoothedlockwasherunderheadof

eadto terminalonterminalblockfrom

pacitorwasremoved.Installterminalbox

singtoothedlockwasherunderheadof

SYSTEM.

citor.

etcontrolboxcover(fig.253) re-

dwashersandpullcoverout toaposition

essible.Disconnectcapacitorleadfrom

traversemotorswitch.Removecapacitor

washerandremovecapacitor.

newcapacitorbyreversingprocedure

ure toothedlockwashersareinstalled

orandcovermountingscrews.

NTINGS,ANDFASTENINGS.

placingcomponentsoraccessoriesof

acetoothedlockwashersin exactlythe

werefoundat thetimeofremoval.When

traps,orwhen replacingunitswhichare

dedwirestraps,be surethecontactsur-

asthesurfacetowhichit istobesecured,

nt sothataverygood electricalconnec-

curingconduitsorcablesin place,besure

bondatleastevery2 feetalongthecon-

cableclampsorsolder.


/ h t t p : / / w w w . h





entirelyofarmorplate.Platesof

mthefloor,sides,anddeck,arearc-welded

ture.Thehull servesbothastheframe

espacerbracketsforthe bogies,or

edtothe hullfrontandrear.Thedifferen-.

gis boltedintothefrontopeningto form

e hull(fig.3).Thisunit isalsopro-

morplate.Lugs areweldedtothefront

provideameansofattachingthetowing

abledvehicle(par.18).

assistantdriverareprotectedbyheavy

ningsdirectlyabovetheirseats.When

closed,theymustalwaysbelockedby

hasp andturningthescrewhandleup

ktoholddoorsin openpositiontopre-

dpossiblepersonalinjury.Donottraverse

pen. Removeperiscopesfromdoorsbe-

oorsopen.Thedriver'shood (par.22)

sdoor openingwhenthedoorisin open

river'sdooristo beremovedfor

amaged,removecotterpinanddriveout

se,takeoutbolts andremovehingeand

catehingepinbeforeinstallingand insert

turret.

metalfendersoverthedrive sprockets

ekeepmudordirtfrombeing thrownup

ks(fig. 3).Thefrontsectionofthe

beraisedoutof thewaywhenremovingthe

Sectionof Fender.Fromunder-

fender,loosentheboltat thelowerrear

Loosenthetwobolts atcenterofthe

d raisefrontsection.Tolowerthefront

elockwashersareagainst headsofbolts;

oposition.Tightenthe threeboltspre-


/ h t t p : / / w w w . h





Inttruclions


/ h t t p : / / w w w . h





sefrontsectionoffender(subpar.b

dinsidethefender,removethetwolong

tionoffenderto thedifferentialhousing.

sfromrear uppercornerwhichattach

extremovethethreeboltsfromthe hull

nderand,frombelow,holdscrewsand

offender atrearedge.Liftoffthe fender.

acefenderinposition,withfront

hetwoouter screwsatrearedgefrom

ghtensafetynuts.Installthetwolong

he differentialhousing.Installthetwo

ersatupper rearinnercornerandtighten

ningboltsand safetynutsinupperrear

at washers,andnutswhichattachfeaider

dertoaline itwithhull,andtighten all

ationbyreversingtheremainderofthe

ar.babove).

CK.

d256).The guntravelinglockis

reweldedtothe hullatrearof vehicle.

edto alugonthe lockandtoalug welded

mentcoverplate,isused toholdthelock

n.

vetravelinglock,disengagegunfrom

eouthingepins.Installtravelinglockby

acinggun intravelingposition(par.

ENTDOORSANDCOVERPLATES.

rtmentDoors(fig.15).Traversetur-

allfilleropeningcoversareclosed.Re-

tandrearinnercornersof eachdoor.Lift

CompartmentDoors.Raisedoors

erslowlyintoclosedposition.Install bolt

nerofeachdoor,andtightenbolts.

rtmentDoorsandSideCoverPlates.

doors andsidecoverplates.Removethe

nnercornersofeachdoor. Removeall

de, andrearedgesofthe sidecoverplates

and installenginecompartmenttopplate

6-200),oneineachholein door,andscrew

doorandsidecoverplateoff.Remove

nsimilarmanner.


/ h t t p : / / w w w . h





Instructions

RaisedandLocked

mentDoorsandSideCoverPlates.

rtmenttopplateliftingeyebolt(41-B-1586-

cornerofdoor.Hoistdoorand side

positionon vehicle.Installsidecover

moveeyebolts,andinstall otherdoor

anner.Removeeyebolts;install abolt

ercornerofeachdoorandtighten bolts.

partmentCoverPlatesasaUnit.

the enginecompartmentdoors.Open

rs(subpar.aabove).Unhookenginecom-

osetheenginecompartmentdoorsand

ntherearinner cornersofthedoors.Re-

eofeachside coverplate.Removebolts

nd rearcoverplate.Removetherowof

earhullplate.Removeboltsontop of

frontof theguntravelingrest.Remove

kfiller cover.Attachliftinghooktodoor

nddoors,as aunit,severalinchesand

ebolts(41-B-1586-200),withnuts,one

f thesidecoverplatesandone ineach

verplate.Lowerhoistandattachlifting

oureyebolts andtohoist,andlift the

g.232).


/ h t t p : / / w w w . h





mpartmentCoverPlatesasaUnit.

artmentdoorsandrear coverplates,re-

ure.Aftercoverplatesareboltedinplace,

errearcornersof enginecompartment

seandhookthe splashpanelinposition.

the frontandrearinnercorners,and

filler capcoversaresecurelyfastened.

ENTSPLASHPANEL.

panelisa thickmetalshielddirectly

mentdoors,primarilytoprotectagainst

ompartmentSplashPanel.Unbolt

mentdoors(par.213a).Unfastenthetwo

nelandraiseitinto averticalposition.

ainerclip.Positionsupportrodinhole in

rtmentdoor,andinsertchainedpinintohole

nbracket(fig.233).

neCompartmentSplashPanel.

pportrod.Pull rodoutofbracketand

p(fig.233).Slowly,lowerpanelinto

ooksinbracketsat frontofrearcoverplate.

partmentdoors(par.213b).

partmentSplashPanel.Unboltand

tdoors(par.213a).In thesplashpanel

tclosestto frontedgeofpanelandloosen

fastenhooksand lowerthepanelonto

bar,prythe righthingepinout ofthe

elto thelefttoreleasethe lefthingeand

mpartmentSplashPanel.Lower

erockercovers.Insertlefthinge pininto

neup therighthingepin withholein

etintoposition.Lineup hingebolthole,

ndtightenboth hingebolts.Raisepanel

ketsatrear.Closeand boltenginecom-

).

LATES.

onsoneachsidein theenginecom-

ponsoncoverplates.Thesponsoncover

esstotheupper fueltanks,andtothe

kunitsandthoseforthe taillightsand


/ h t t p : / / w w w . h





Instructions

necompartmentdoorsandrearcover

ewaterexpansiontank(par.1201>).

s(par.81o).Drain lowerfueltankto

elowfuelreturnlineelbow(par.65 c).

be removed,disconnectfireextinguisher

nonbulkheadandatlowerrearnozzle.

escliponfireextinguishertubetosponson

woboltswhichattachupper rearfire

ettosponsoncoverplateandremovetubes,

ssembly.Ifthe upperfueltankisnot to

ubetolowerrearnozzleat theuppernozzle.

nozzle,andtubetotee connectionon

Disconnectfuelreturnlineatelbowon

eelbowwithnipple.Whenremovingright

onnectfuelreturnlineatfuelselectorvalve

removingtheleft sponsoncoverplate,

ightlyinwardtoclearthecoverplarte.

bricatingoiltankfiller pipe.Loosenfiller

eclampfromsponsoncoverplate,andlift

er openingintank.Removecoveron

minalboxanddisconnectwiresintheconduit

oncoverplate.Unscrewconduitconnector

hhole insponsoncoverplate.Tagthe

moveallboltswhichattachsponsoncover

oltswhichattachthefan shroudbracket.

e itrearwardslightly,andliftit out.

rplatebyreversingtheremovalpro-

nginecompartmentdoorsandcoverplates

dinspectfuelandwaterconnectionsfor

ENTFLOORPLATES.

compartmentfloorplatesarethe

he undersideofthehullto covertheaccess

mpartment(fig.234).Agasketis usedon

rtight.

awayjackundertheexactcenterof

ckto supporttheplateandremovethe

wlytolowertheplate.

tis damaged,cleansurfaceonplate

mentnewgasketto platewithnon-

.Oilthefloorplateboltswithengine oil.

ayjack.Rolljackintoposition,and raise

t holes,andinstallandtightenbolts.


/ h t t p : / / w w w . h





PLUG

LUGS

VERPLATES

DRAIN

T

RAIN

ehicle


/ h t t p : / / w w w . h





eInstructions

MENTFLOOR.

gcompartmentfloorisaraisedplat-

dassistantdriver's seats.Sevenhinged

accesstothebatterybox,stowagespace,

ersandrearuniversaljoint.

rFightingCompartmentFloor.To

rs,takeoutscrewswhichattachhingesto

ecrossmembers,firsttakeoutbolts which

mbers.Twocrossmembersareweldedto

berandareremovedasan assembly.Before

iresandconduitsmustbedisconnected

boxandinterphoneswitchbox.Cross-

stalledbyreversingthe removalprocedure.

edoor,whichcoverstheopeningin

ssistantdriver'sseat,isheld inplaceby

Thebolts areoperatedbythesingle

scapedoorforsuchmaintenance

epropellershaft,positionajackunder the

ulllockinghandleinto releasedposition,

owerthedoor.

ditionofdoorgasketandreplaceif

ithengineoiland workthereleasehandle

y.Raise hatchintopositionwithjack,or

e bythetwohandles,andturn there-

atchsecurelyintoposition.

sandassistantdriver'sseatsare each

mswhichswingupand downonbrackets

ull(fig.13).Twoextensionspringsare

counterbalance.Theseatsareadjustable

dforth.

'Seats.Removeboltswhichattach

osideof hull.Toinstallseatassembly,

Lubricateworkingpartswithengine

easeleversoperatefreely.

ORPLATEANDSUBFLOOR.

sseatfloorplatecoversand protects

pedallinkage.Thesteeringleverparking

tedonthetopof theplate(fig.8).The


/ h t t p : / / w w w . h





tedto thehullfloorbeneaththedriver's

erator,clutchpedal,andsteeringlever

ssubfloor.

tFloorPlate.Releasethebrake

and removespacerandpinwhichat-

bracket.Removefourboltsthatholdfront

boltwhichattachesoilcoolertubeclip.

rplatescrews.Pullfloorplaterearward,

eatFloorPlate.Slide floorplate

htenthe fiveflatheadscrewsandthe

ertube clip.Installthebrakequadrant

ants,andlineupholeswith frontbracket.

uadrants,andinstallpin.Insertcotterpins

eadcotterpin.Raisequadrantrear

nstallandtightenbolts.

tSubfloor.Remove-thedriver'sseat

river'sseatfloor plate(subpar.babove).

evispinswhichconnectsteeringlever

verandcrossshaft lever.Disconnect

andcylinderrodfrom clutchpedal

eleratorcontrolrodandreturnsprings

ttheboltswhichattachthesubfloor,and

eatSubfloor.Thesubflooris in-

movalprocedure.Beforethefloorplate

ccelerator,clutch,andbrakeleverlinkage.

dadjustlinkageif necessary(par.129).

te (subpar.cabove).Installthedriver's

DPINTLE.

winghooksareprovidedatthe front

ugsweldedtofrontandrearof hullpro-

nt.Thehooksarefastenedto thelugsby

ebyspringretainerpins.Thepintle,which

earplateand providesameansofat-

ammunitiontrailer,mustneverbe used

wbarloadin excessof10,000pounds.

Hooks(fig.17).Atowinghookis

ngspringretainerpinsandwithdrawing

rseremovalprocedure.

ig.17).Removecotterpin,castle

hichsecurepintleto lowerrearhullplate.


/ h t t p : / / w w w . h





nstrucfiom

ainsthull plate,installcapscrews,castle

NG.Protectivepaddingisattachedto

assistantdriver's doors(figs.5and6) and

rretopening.Thepaddingisheldin place

S.

rain valves(fig.234)arepoppet

pringtoholdthem inclosedposition.The

ompartmentandthetwo beneaththe

orcanbelockedintheopenpositionby

eis presseddown.Thevalvesinthe

rareoperatedbyremotecontrolhandles

n.

inValve.Holdspringdownwith

ybelowknob.Holdvalveupanddrive

chesknobtovalvestem.On thefour

ture,nextremovelatchpinwhilevalve

drainvalve,firstlubricatevalvestem

nd holdvalveagainstseatfrombeneath

alllatchpin,ifused,andposition the

estem,withthetaperedhole ineach

oilofspringdownwithscrewdriver,and

ATA.

rygeneratorunitconsistsofthe

ngine,thedirectlyconnectedgenerator,and

heengineis equippedwithametallic-

fuel isfilteredbya screen-typeelement

eltank.An automaticchokeisusedto

temperatures.Thischokeoperatesin

ndcanbe"set"toafford propermixture.

ringsystemisshownin themasterwiring

ycle


/ h t t p : / / w w w . h





300rpm

m

m

20,single-jet

ound

nd

ADJUSTMENT.

irectedonlubricationorder(par.

movethetwomountingscrewsinendof

rburetor.Thoroughlycleanindryclean-

grade engineoilandallowit todrain

nthecarburetorand installthescrews

tment.Removecarburetorfrom

.Removeservocoverfromcarburetor

ntplatesothat,ata roomtemperature

utterflyplateis Vii>inchawayfromsideof

dReplacement.Pullcoilwireand

g.Removethesparkplug.Usingwire

p.Ifgapis morethan0.035inch,replace

nthe plugifitis notreplaced.Clean

apterintop ofcylinder.Ifholesarecor-

notifyhigher authoritytoreplacebaffle.

gasket,withoutusing excessiveforce.

pressortoplug.

utator.Wheninspectionrevealscom-

yandthereis excessivearcingatthe

commutator.Removeattachingscrewand

ate.Cut apieceofwoodandshapeit to

utatorbetweenthetwobrushholders.Place

aper,abrasivesideout,overendofstick.

essflint paperagainstcommutator.Be

with commutator,andmoveitbackand

untilcommutatoristhoroughlycleanand

owdustout ofendofgenerator.Install


/ h t t p : / / w w w . h





Instructions

R

eratorCompartment

erator.

Removemountingscrewsandwash-

litateremovalofwires fromterminals

sfromcontrolboxterminalsand liftout

tsfromcontrolboxandpulloutwiring.

nalboard(fig.235)andremovebond

tframe.NOTE:Tagallwiringbefore

nals.

DEXHAUSTSYSTEMS.Shutoffaux-

lsupplyatthe fightingcompartmentbulk-

partmentcoveranddisconnectthefuel


/ h t t p : / / w w w . h





chexhausttubefromthe engine,loosen

withmuffler.

ENERATOR.Removeattachingbolts

ntframeandliftout.Raisefloor covering,

and removefillerpipe.Detachground

efourmotormountingbolts. Removeside

ftauxiliarygeneratorfromcompartment

icle.

enerator.

ENERATOR.Lowergeneratorunitinto

motormountingbolts.Attachtheground

lfillerpipe,side panel,andcompartment

XHAUSTSYSTEMS(fig.235).Install

Connectfuellinetocarburetor.

nnectwiringatterminalboardand

mentframewithbondclamp(fig.235).

ngsincontrolbox,positioncontrolbox

asshowninfigure236.Tighten conduits

over.

NDTESTOPERATION.Turnonthefuel

closethe24-volt masterswitch,andstart

atordoesnot operatesatisfactorily,refer

sting,stop thegeneratorengine,shutoff

ine,andopenthe24-voltmasterswitch.

NOFAUXILIARYGENERATOR.Make

O.FormNo.478,"MWOandMajorUnit

cord,"wheneverauxiliarygeneratorisre-

ORCONTROLBOX.

box,mountedabovetheauxiliary

instheammeter,stopswitch,andstart

cedas aunitsincethevariousunits are

noff24-voltmasterswitch.Remove

s,andlowercoverfromboxasshownin

esfromterminalsonammeter,remove

ut ammeter.Wheninstallingammeter,

xcover,installwashersandnutstohold

ctthewiresasshownin figure236.Install

urnoff24-voltmasterswitch.Re-

ashersandlowercoverfromboxasshown


/ h t t p : / / w w w . h





efn»frucfions

neratorControlBox— CoverLowered

wiresfromterminalsonstop switch(fig.

heronoutsideof cover(fig.235),and

Installstop switchasfollows:Place

ndinstalloutsidewasherandnut (fig.235).

lativetocoverby turningnutoninside

terminalsasshownin figure236.

ollowprocedureoutlinedforstop

Refertofigure236for correctwirecon-

ORREGULATOR.

eandamperageoutputoftheaux-

edbytheauxiliarygeneratorregulator.


/ h t t p : / / w w w . h





neratorFuelTank— Installed

ona verticalsupportlocatednearthe

kheadbeneaththesubfloor.Theregulator

urrentrelay. Ifregulatorfails,replaceit.

t.

tynutswhichattachregulatortosup-

sand tipthetopin toreachtheterminal

verandremovewiresfromterminals.Dis-

ulator.

o.30wiretofieldterminal,and No.31

02), atgeneratorregulator.Connectcon-


/ h t t p : / / w w w . h





ittfructions

minalcoverand securethewingnuts

ofthemountingstuds,placeone internal-

her,oneendofagroundingstrap, one

erendofthegroundingstrap, andanother

ockwasher.Positiontheregulatororthe

nuts.

ORFUELTANK.

tankisusedto storethegasoline

atorengine.Thetank ismountedinthe

tsponsonforwardoftheuppermainfuel

alvein thefuelline,locatednearthe

khead,controlstheflowoffueltothecar-

draisefiller capcoveroverthe

ercap(fig.237).Fill thetankwithgaso-

tilfuelreachesbottomoffillerneck.

ockthe fillercapcover.

elline shut-offvalve.Disconnect

ube andplaceasuitablecontainerwith

eltube.Openfuelshut-offvalveand

ose thevalveandconnectflexibletube.

237).Drainthefuel tank(subpara-

nginecompartmentdoorsandsidecover

ethefillercap.Removescrewsfrom

Removeadapter,fillerneck,andspacer.

partmentterminalboxfromsponsoncover.

ndpullenginecompartmentterminalbox

uellinebondclampanddisconnectfuel

heelbow.Removefueltankmounting

ughengine compartment.

.Removethreescrews,adapter

koutlet.Removescreenandwipeclean,

allscreenandadapter plate,usingnew

eltank intopositionbetweenbulk-

ank (fig.237).Installfuellineelbowat

ellineto elbow.Slidebondclampinplace

stallsponsoncoverandright enginecom-

stallspacers,fillerneck,andadapter.

enginecompartmentdoorsandsidecover

eltank(subpar.babove)andopen


/ h t t p : / / w w w . h





EM

quippedwitha carbondioxidefixed

orusein smotheringfiresintheengine

hesystemconsistsoftwofixedfireex-

containing10poundsofcarbondioxide

ylindersareclampedinbracketslocated

efightingcompartmentbeneaththefloor

nectedbytubingtosix nozzlesinthe

evalvesareequippedwithremovablecon-

ratedmanuallyatthecontrolheads

lesmountedontheundersideof thehull

ofdriver'sseat(fig.22),or bytwopull

atleftrearof turret(fig.15).Acheck

etweenthetwocylindersandthemaindis-

gasfromescapingintothe compartmentif

ththeother removed.Eachcylinderis

vewhichisidentifiedby aredcap.Two

sareusedtoextinguishfires inthedriver's

tingcompartment,oroutsidethevehicle.

lefire extinguisher,refertoparagraph

atcarein handlingcylinders.Donot

hly.Aloadedcarbondioxidecylinderis

hell.

ystemforanymechanicaldamage.

pullhandleshavebeenreleased.Inspect

afetysealisinplaceand thatsealwireson

sareintact.Ifred sealcapismissingor

nderhas beendischargedandmustbe

refullyweigheachcylinder.Subtractthe

thecylindervalvebodyfromtheweight

differenceislessthan9 pounds,replace

s fullychargedwith10poundsofcarbon

eremoved,inspectsystemforany

seconnections,andpluggeddischargenozzles.

tsidepullhandlesto seethatcontrol

thandlessecurelyinspring clips.

INGUISHERS.

poundportablefireextinguishersare

ecuredwithaquickreleaseclamp(fig.21).

er'scompartmentandoneismountedinthe


/ h t t p : / / w w w . h





Instruction)


/ h t t p : / / w w w . h





E

IS

dAssembly

reextinguishersfor mechanical

gclamps,andfordischargedcondition.

weightof eachcylinderisstampedon

itstandswithoutdischargehorn.Re-

ndweighthe cylinderwithcontents.From

ptyweightto determinethenetweight.

6pounds,replacewitha fullycharged

SHERS.

sherCylinders.Unscrewthecon-

he cylinderandremovethehead

argetubesat thecheckvalveanddis-

cylinders.Removethecylinder bracket

der.

uisherCylinders.Placethecyl-

thebracketstrap.Connectthedischarge

ightenthetubestothe checkvalve.Install

linder.

Cable(Dual-pullMechanismto


/ h t t p : / / w w w . h





tnstruct>on<

screwthelargeswivelnutandremove

ylinder.Disconnecttheconduitatboth

alfof thedualpullmechanismanddis-

8).Slidetheconduitoffthe upperendof

BLEFROMCONTROLHEAD.Remove

ewswhichattachthe coverplatetothe

thecover.Disconnectthecableandpull

ndCable(Dual-pullMechanismto

serttheendsofthetwopull cables

cableintoa2-inchpieceofcoppertubing.

andslidethecoppertubeup totheupper

anism.Crimpeachendofthecoppertube

ldtheupper endofthetubeand twistthe

rnstosecurelyconnectthecables.

dethelowerhalfofthedual-pull

rthe cable.Screwthebarrelintoplace

heconduit.Install theconduitclampto

ONTROLHEAD.PlaceaVi-inchpin

thepulley ontopofthe dual-pullbarrel

in thecables(fig.239).Turnthe pulley

seuntilthepin contactsthestopandisin

controlbody.Withthepulleyin that

tover theVi-inchpinandconnectitto

ead;thenremovethepin.Installthe con-

lthe headonthecylinder.

oControlBoxon TopofHull)

enutand removethecontrolheadsfrom

ders.Removethelockwireandthree

overplatetothecontrolheads,and discon-

eads.Disconnecttheconduitfromthe

rel.Unscrewthelowerhalf ofthebarrel

.Pullthehandleandcableout ofthe

To ControlBoxonTopofHull).

ovetheplateandpulleysfromthe

opullhandle,andthreadcableover pulley

ual-pullbarrel. Pullbothcablestight

controlbox.


/ h t t p : / / w w w . h





efertosubparagraphd(1)above.

LFOFDUAL-PULLBARRELANDCON-

ofthe dual-pullbarrelintoplaceand

barrel.

ONTROLHEAD.Refertosubpara-

Conduit(To BracketOver

elargenutandremovethe controlhead

ylinder.Removethelockwireandthree

overplatetothecontrolhead,and discon-

ad.Disconnecttheconduitfromthe bot-

Unscrewthelowerhalf ofthebarrel

.Pullthehandleandcableout ofthe

seat.Disconnecttheconduitat bothends.

psfromthehullandremovetheconduit.

or Conduit(ToBracketOver

ONDUIT.Attachthecabletothepull

ethroughthe bracketabovethedriver's

oughthe conduitandpulley,anddown

el.Connectbothendsofthe conduitand

ull.

DUAL-PULLBARREL.Refertosubpara-

LFOFDUAL-PULLBARRELANDCON-

phf(3)above.

ONTROLHEAD.Refertosubparagraph

ozzles.Usepreformedflaredcopper

whenmakingreplacements.Whenre-

tingwrenches,andholdelbowor fitting

sbeingremoved.Toremovetubeand

ampsfromenginecompartmentwalls.

ketandunscrewtubecouplingnutatnear-

ubeandnozzle,anddisconnectthetube

Nozzles.Attachoneend oftube

to tubeconnection,butdonottighten

zletobracket,andinstalltubeand clamps

alls.Tightenallcouplingnutsandcon-


/ h t t p : / / w w w . h





QUIPMENT

tainsinformationforguidanceofper-

rationofthisequipment.It containsonly

ytousingpersonneltoproperlyidentify,

auxiliaryequipmentwhilebeingusedor

equipment.Detailedinstructionsonthis

nseparatetechnicalmanuals.

EQUIPMENT

ATA.

dioequipment(SCR-610)forthis

mitterandreceiverunit,withpowersupply

erightofthe assistantdriverinthesponsor),

edonthehull abovetherightfender(fig.3).

nt(BR-19)consistsofbothradioand

TheAmericaninterphonesystem

erandpowersupplyunit(BC-667)

stto therearoftheradio equipment,and

rsandcrewmountedconvenienttothe

m(figs.244and245).

BC-6S9

67

ntrolboxBC-739

6

-GR

RL-106-VI

abacksecurelywhennotinuse,

motion.Makesureantennais untied,ina

ouchinganythingwhentheradiois inuse.


/ h t t p : / / w w w . h





pment

ANSMITTERUNIT

terphoneInstallationDetails

rprotectionofthe radioequipment

nd thatfastenersandzippersarein work-

stall thecoverontheradiowhenit is

the 24-voltmasterswitchwhen

asterswitchshouldgetturned offunder

rnradiooperatorandwaitforhissignalto

onagain,or damagetoradioequipment

quipmentofany kindbehindor

couldpreventfreemotionoftheshock

hconnections.

tart enginewithradioturnedon.


/ h t t p : / / w w w . h





mcnt

MountBase

onotsteamthevehiclecleanwith-

o(par. 236).Donotdoany vehicle

chtheequipmentmightbeinterferedwith,

radio,interphoneequipment,controlboxes,

nvolvedinthevicinityof theworkbeing

TION,ANDCONNECTIONOF

oidthepossibilityofdamagetoequip-

nstallation,andtoinsure properconnec-

unitsorgroups ofunitswithcables

withoutdisconnectionfromeachother.For

heremovalofonly oneunitmaybere-

intenancejob,iftheunitisremovedas one

instructions,thewholegroupwillbe

ectingunits,onefromtheother.Ifcolor

reewith thatgiveninthe followingpro-

rytotag thewireswhenremovedfrom

erAssembly.

ulloutcontrolboxcordsif plugged

ster switchesoff,separatepowersupply

eptacleandscrewpowersupplyreceptacle

receptacletoprotectitfrommoistureand

minalboxcoveranddisconnectterminal


/ h t t p : / / w w w . h





pment

D

ioTerm/no/Box— CoverRemoved

rcordfromthe positive(+) andnegative

d pullcordfrombox(fig.242).Discon-

tonforwardend ofradio.Releasesnap

nsmitterandreceiverunittopowersupply,

ndreceiverunit.Releasesnapfasteners

ytobaseandremovepowersupply.Base

vingbasemountingscrews(fig.241).

ONNECTIONFOROPERATION(fig.240).

npositionwithfourmountingscrews.

ase,withcarryinghandletowardtheleft

withsnapfasteners.Positiontransmitter

powersupplyandsecurewithsnapfast-

4-voltmasterswitchesareoff. Connect

ngandreceivingunitwithknurled nuton

terminalboxtopowersupplypowercord

dedinfrontend ofsponsonterminalbox,

greenwiresto thenegative(—)terminal,

estothepositive(+)terminal.Install

screwsprovided.Removepowersupply

malereceptacleofpowersupplytoradio


/ h t t p : / / w w w . h





ment

oneBox— AmplifierRemoved

tionofthecord intothepowersupply

curebyscrewingthe knurledcollaruptight.

oxcordsintothejacksprovided,asshown

plugmarked"PL-55"inthetopjack.Check

tchesareoffbeforeturningon12- and24-

dControlBoxAssembly.

d24-voltmasterswitchesoff,remove

nalboxanddisconnectinterphonecircuit

onnectwhitewirefromNo.1 terminal,

minal,greenwire fromNo.3terminal,blue

ndblackwire fromnegative(—)terminal

ircuitcordfromterminalbox.Discon-

rdwiresasfollows:Disconnectbrownand

(—)terminal,andwhiteandyellowwires

Pullinterphonepowercordfromter-

plugsfromtransmittingand receiving

pssecuringradiotocontrolboxcordsand

ntrolboxcordtohull. Removeeightscrews

erphoneamplifierininterphoneamplifier


/ h t t p : / / w w w . h





pment

MANDER'SCONTROLBOX

BOXRAPD343107

Equipment— RightSideofTurret

dlesprovidedon theinterphonepanel,pull

ackstripandbox(fig.243). Remove

frominsideofboxand setboxdownon

ewsandwasherssecuringcovertocontrol

oxfrommountingpadbyremovingmount-

ominsideof controlbox.Interphone

andcordsmaynowberemovedasan

ONNECTIONFOROPERATION.Position

mountingcapscrews.Securecoveron

sandtoothedlockwashers.Positioncon-

gscrewsand toothedwashers.Secure

ampswhichwereremoved.Makesure


/ h t t p : / / w w w . h





ment

LOADER'SSEAT

or— RightSide

tchesareoff.Plugradio tocontrolbox

eceivingunit,asshownin figure240.Plug

ackstripininterphonebox(fig. 243)and

asherssecuringinterphoneamplifierinbox.

rdthroughopeningprovidedinsponson

tbrownandblackwirestonegative(—)ter-

wwiresto positive(+)terminal.Feed

oughopeningprovidedinsponsonterminal

retoNo.1 terminal,yellowwiretoNo.2

3 terminal,bluewiretoNo.4 terminal,

(—)terminal.Placecoveron terminal

andtoothedlockwashers.

ner'sControlBoxes.

d24-voltmasterswitchesoff,remove

rminalbox (fig.244).Disconnectthe

er'scontrolboxcordfromterminalsin


/ h t t p : / / w w w . h





pment

CORDSJACKS

eel— PartiallyDisassembled

.242).DisconnectwhitewirefromNo.1

No.2terminal,greenwirefrom No.3

o.4terminal,and blackwirefromthe

cordfromterminalbox.Removecable

rret.Pullinterphonereelto controlbox

movecoverretainingscrewsandwashers

nder'scontrolboxes,andremovecovers

boxmountingscrewsandwashersfrom

trolboxesandconnectingcordsasan

ONNECTIONFOROPERATION.Makesure

tchesareoff.Positioninterphonecontrol

44 andsecuretomountingpadwithscrews

Feedcommander'scontrolboxtoturret

openingprovidedintop ofterminalbox

estoterminalsaccordingtocolorand ter-

insubparagraphd(1) above.Position

securewithscrewsand toothedlockwash-

controlbox cordsintocommander'scon-

pswhichwereremoved.


/ h t t p : / / w w w . h




ment

g.245).

der'scontrolbox,usingsameproce-

ommander'sandgunner'scontrolboxes(sub-

exceptionthatitisnot necessaryto

controlboxcords.

ONNECTIONFOROPERATION.Install

singthesameprocedureas usedtoinstall

'scontrolboxes(subpar.d(2)above).

bly.

plugs,andremovereelto controlbox

ereelcordfromthespiralguidemounted

Usinga wrenchonthesquare-headspindle,

hebrakeandremovethe spindleandreelas

kwasherfrombrakeendofspindle(fig.

ONNECTIONFOROPERATION.Installlock

nd reelassembly(fig.246).Screwspindle

eof turretandtightensecurely,usingwrench

adjustmentisnecessaryforproperoper-

he setscrewontheadjustingnut and

tingnut formoreorless brakeage,whichever

stingnutby tighteningtheadjustingnut

intospiral guidemountedonsideofturret

Plugreel tocontrolboxcordsintopro-

elandjacksat topofcommander'scontrol

ON

throughXLVIcontaininstructionsfor

mgunM3 andthe90-mmgunmountM4A1.

munitionandcontainsinformationonthe

90-mmgun.Forlubricationinstructionson

o sectionXIV.Forpreventivemaintenance,

on,disassemblyandassembly,andgeneral

9-374.

-mmgunmotor carriageM36B2is

enemytanksandothergroundobjectives.

d360 degreeseithermanuallyorbyusing

echanism.Thegunmaybeelevated20

pressedto—10 degrees(178mils).


/ h t t p : / / w w w . h





/ h t t p : / / w w w . h





pment

n(fig.247) isemployedchieflyagainst

ddepressedmanually.Themachinegun

dentlyoftheturret. Forcompleteoperating

machinegun,referto FM23-65.

STRUCTIONS

GUNINFIRINGPOSITION.

echcovers.

elinglock,pullreleasespring downon

evatethegun.Detachtier odfromlock

ntravelinglockis thenlatchedtothe

carriage(fig.249).

in turnreleasesthecradletraveling

egunin ordertodisengagethecradlelock

e (fig.248).

yturningthe handle,pullingitout,and

lockwise(fig.250).

EFIRING.

Cylinder.Tocheckoillevel,

evationquadrantand removeboththe

plugs.Elevatethe gun50mils.The

p oftherearhole.Addoil asrequired.

pecialrecoiloil(Spec.AXS-808)which

tures.

akesure itisfreefrom allobstruc-

operatinghandletolatchedposition.

eanlinessanddefects.

aragraph251.

ET.

licturrettraversingmechanismen-

rsethe turretquicklyandaccuratelywith

mitsquickr eversalforchangingtargets.

eitherdirectionforfollowingastationary

riageisin motionorwhengunnerismaking

copicsight.Throughasinglehandgrip, the

uratelysightedonastationaryor moving

carriageis inmotion.


/ h t t p : / / w w w . h





ructions

ingLock— LockedPosition

etraversingturretbymeansofthe

hanism,makesurepersonnelareclearof

rseshiftlever(fig.250),in frontofgun-

nism,tothepowerposition (pullleverup

aybenecessarytoslightlyturnthe

andle(fig.251)ontop ofgearmechanism

ersingmotorswitch(fig.253) tothe"ON"

vemotor.Disengageturretlock.NOTE:

etlockcompletelydisengagedbeforetra-

n positionifneedfortraversingis com-

econtrolhandle(fig.250)onthe traverse

unelevatinghandwheelcontrolsthespeed

otation.To traverseturrettotheright,

ntrolhandlesothe topistothe right.To

urn thepowertraversecontrolhandleso

reasethetraversespeed,turn thepower

rthertotheright orleft,dependinguponthe

esired.Tostopturret traverse,release

ndleorbringit totheuprightor neutral

nbereversedinstantlywithoutdamage

sm.


/ h t t p : / / w w w . h





ment

gLock— LatchedPosition


/ h t t p : / / w w w . h





ructions

T92)

EDAL

ols


/ h t t p : / / w w w . h





ment

chanism

50).Ifelectricpowerfailsor if

willnotoperateduetosome othercause,

y themanualtraversecontrolhandle

mechanismtotherightofthegunner's seat.

250).Movegearshiftleverundergear

position(turnleverdowntowardturret

toslightly turnthemanualtraversecon-

earmechanismtoengagegears.The

arethenengagedwiththeturret ringgear

ltraversecontrolhandleand itsassociate

echanisminfrontofthegunnerto release

nualtraversecontrolhandleto theright

etclockwise,andtotheleft orcounterclock-

erclockwise.Therateofspeedofturret

onthespeedat whichhandleisoperated.

trolhandleturns freelyandfailstomove

nderthegearmechanismisin power

uldbemovedtomanualtraverseposition.

RESSINGTHEGUN.

epressedbyturningtheelevating

rightsideof themount(fig.251).Maxi-

esandmaximumdepressionis10 degrees.


/ h t t p : / / w w w . h





ructiofls


/ h t t p : / / w w w . h





ment

OLHANDLE

FIRINGTRIGGER.

nstallation

locatedonthe toprightsideofthe

fthe guninelevation(fig.252).Refer

mationonits operation.

iredto elevateordepressthegun,a

tedonthe leftsideofthe mount(fig.254).

EECHMECHANISM.

enbreech,graspthegripportionof

leandpressthe handledownuntiltheex-

openposition.CAUTION:Keephands

open.Returnbreechoperatinghandleto

iatelyafteropeningbreechinorderto avoid

chanism.

netheboreofthe guntoseethatit is

material.

theroundintothe chamberwith

eflangeofthe cartridgecasetodrivethe

tomaticallyclosethebreech.Theloader's

wardashe shovestheprojectilehomein

kasitis automaticallyclosed.


/ h t t p : / / w w w . h





ructions


/ h t t p : / / w w w . h





ment

ingLock— UnlockedPosition

resstheextractorsforwardedwith

dgecaseor ablockofwood.Thebreech-

etoitsclosedposition.CAUTION:Donot

ctors.Makesureoperatinghandleis in

RATION.Underordinarycircumstances

nuallyopenthebreechonlyatthestart of

thegun mountcontactsthebreechop-

ounter-recoilactionoftherecoilmechanism,

ractstheemptycartridgecase.

o the"ON"position(fig.253).The

lybymeansof afiringtriggeron the

theroundfails tofire,donotopen the

ismmayberecockedbyhandbypushing

ckingleverontheright sideofthebreech

gpinis notheard,thefiringtrigger

eif thesolenoidoperates.Ifthesolenoid


/ h t t p : / / w w w . h





ructtons

gLock— UnlatchedPosition

maybe firedmanuallybydepressinga

floor infrontofthe gunner(fig.250).

er checkinsuhparagraphaabove,the

shouldbe checked.Thefailuretofire

yingoutofbatteryposition,failure ofthe

ofthebreechtoclose,or defectiveammuni-

y,recockbymeansofthe cockinglever

ech,andattempttofire (fig.250).Ifthe

reeattempts,wait30secondsbefore

movetheround,reload,andattemptfire

TRAVELINGPOSITION.

oits "SAFE"position.Thislocksthe

hatguncannotbefired.

un,and installbreechandmuzzle


/ h t t p : / / w w w . h





pment

oneoftwopositionsdependingupon

eededforimmediateuse.Forimmediate

glockwhichcanbe operatedfrominside

goingtobemovedover acomparatively

ot beneededusethegun tubetraveling

ngposition bypulling,turning,and

arterturncounterclockwise(fig.250).

ROLEQUIPMENT

ntrolequipmentforthe90-mmgun

udesthetelescopemountM64withtele-

nstrumentlightsM33 ortelescopeM70P

C,telescopemountM69withpanoramic

mentlightM31,elevationquadrantM9

thefuzesetter M14,thegunner'squadrant

M64WITHTELESCOPEM76F,

dtelescope(fig.257)areused for

mgunM3. Theyaremountedontheright-

eandmovewiththegun.Windowsinthe

inationofthereticlepattern.

thany ofthetelescopes,bringthe

pointonthereticle (fig.258),representing

ection,byrotatingthe elevatinghand-

arriage.Thegunner'seyeshouldbe

sfromthetelescopeeyelenswhenobserving.

erheostatknobon theendoftheinstru-

epatternisseenclearly.

M69WITHPANORAMICTELE-

peM12(fig:259)andtelescopemount

aying the90-mmguninazimuthfor

tternseenwhenlookingthroughthe pan-

infigure260.The lineofsightingcanbe

heelevationknobatthe topofthetele-

exesindicatethenormal(zeroelevation)


/ h t t p : / / w w w . h





uipment


/ h t t p : / / w w w . h





pm.nt

ernofTelescopeM76F

gis movedinazimuthbytheazimuth

ver,whendepressed,permitsrapidmotion

zimuthscale(100-milintervals)is

uthmicrometer(10-milintervals).The

etfordeflectionright(R) orleft(L)on

evationscaleandmicrometeronthetele-

o thesameelevationasthegun before

tocompensateforerrorsinazimuthwhen

vel.Alongitudinallevel(angleofsite)

whentheazimuthscaleis inahorizontal

nt,setthe azimuthofthetargetwith

on theazimuthscaleandmicrometer.Set

heazimuthmicrometerindexinthe proper


/ h t t p : / / w w w . h





quipment

elescopeMl2


/ h t t p : / / w w w . h





ment

rnofPanoramicTelescopeMl2

rednumberofmilsas indicatedonthe

eazimuthknobuntiltheoriginalmicrom-

ppositethenew positionofthemicrometer

ofsitescale andmicrometeratnormal

angleofthe gunfromtheelevation

caleandmicrometeronthemount,using

ngthetelescopemountleveledlongitu-

bymeansoftherockerknoband thecross-

eguncarriageuntilthe verticalcrosshair

mingpoint.Itmaybe necessarytorotate

elescopeinorder tobringtheaimingpoint

NTM9.

M9(fig.261)is usedtolaythe 90-

irectfire.

on,settheelevationangleon the

rvals)andonthemicrometer(1-milinter-

oscalesandtwo micrometerindexes.Use

hesidecorrespondingtothe scaleinuse.


/ h t t p : / / w w w . h





ipmtnt


/ h t t p : / / w w w . h





ment

CASSEMBLY-]

6— RearView

sedasa handwrenchtosetthefuzes.

s beenremoved,placethewrenchonthe

of theholefittingthefuze.Engagethe

ndturn thehandleclockwise(increasing

arkonthe fuzealineswiththerequired

cale.Usecareinremovingthewrenchto

.

sightingoperationistotestthe aline-

mentforparallelismwith theboreofthe

ybeperformedbysightingon awellde-

yardsdistant.

gun,andwhilelookingthroughthe

edistantobject.WiththetelescopeM76D,


/ h t t p : / / w w w . h





quipment

adrantM1

ount,observethroughtheeyepieceand

ossonthereticlewithrespectto theaiming

de,movethelineofsightingofthe tele-

nobsonthe rearofthemountuntil coin-

esightingtheM76F,iti snecessaryto

tionofthecenterlinedashesextended

tionofthe boresightcross.Thisis done

pincorporatedintotelescopereticle.

amictelescopeMl2,proceedinthe

nd micrometertoreadzerosimul-

tedontheaimingpoint,read theele-

onquadrant.Transferthisangleto the

meteronthemount.

eveled,usingthecross-levelingknob.

noramictelescope,andbringthe

w,usingtheelevationknobonthetelescope.

ronthereticlefalls ontheaiming

slaterallyparalleltothe gunboreand

ne.


/ h t t p : / / w w w . h





ment

rdoesnotfallon theaimingpoint,

opeinitssocketbylooseningthe headless

copesocketandadjustingthetangent

sobtained.Tightentheheadlesslocking

62)is usedbythedriverand assistant

ervationfromthe interiorofthetank.

a holderbyalatchmechanismanda lock-

seperiscopesare constructedofplastic

rinto smallpiecesifstruckbya projectile.

he periscopebodywithaneccentricmecha-

hat theheadsarereadilyreplacedwith

provided.

efromtheholder,open thelatchon

loosenthelockingknobonthe frontof

scopestraightoutof theholder.

mthe periscopebody,turnthetwoec-

donthesidesandupperpart oftheperiscope

s completelydisengagedfromthelatches

m.Lifttheheadfromtheperiscopebody.

positioniton thetopofthe periscopebody

efrontside oftheperiscope.Turnthe

thereferencearrowoneacheccentric

ngarrowontheperiscopebody.Seethat

cmechanismlieflaton thesidesofthe

e,graspthesides oftheperiscopeand

stheholderandperiscopeuntil thedesired

hefield ofview.

NTMl.

Ml(fig.263) isusedtolay the90-mrn

tfire.

sused forthesamepurposeasthe ele-

r,itisusedwhengreateraccuracyisneeded

ngto1/10ofan inch.

ITION.

forthe90-mmgunM3is listedinthe

menclature,whichcompletelyidentifiesthe

isting.


/ h t t p : / / w w w . h





N

ECTIUOF

okeless,w/fuze,TSQ,

1,M2,M3,andT8

okeless,w/supplchgand

cdelay,for90-mmguns

okeless,w/fuze,PD,

r90-mmgunsM1,M2,

okeless,w/fuze,PD,

r90-mmgunsM1,M2,

okeless,w/fuze,PD,

r90-mmgunsM1,M2,

okeless,w/fuze,PD,

90-mmgunsM1,M2,M3,

shless,w/fuze,PD,M48A2,

mgunsM1,M2,M3,andT8

shless,w/fuze,PD,M48,

mgunsM1,M2,M3,andT8

okeless,w/supplchgand

cdelay,for90-mmguns

okeless,w/fuze,PD,

or90-mmgunsM1,M2,

okeless,w/fuze,PD,

or90-mmgunsM1,M2,


/ h t t p : / / w w w . h





pment

N— Contd.

ontd.

M82,2,800-ft/sec,flashless,

3,and T8

M82,2,600-ft/sec,smoke-

90-mmgunsM1,M2,

mokeless,for90-mmguns

ashless,for90-mmguns

okeless,for90-mmguns

shless,for90-mmguns

0-mmguns

fuze,dummy,M44A2,90-mm

htracer

cppedwithtracer

ck

below,FUZE,CP,M78andBOOSTERM2Sareissuedseparately

oHEShellM71.Difterentlots ottuzesaremanutacturedwithnon-

ction.Nondelaytuzesareidentifiedbythewhitetip onthenose.

totheM71 shellbyOrdnancepersonnelorunderdirectionot Ordnance

withinstructionsissuedintechnicalbulletins.

esotthiscartridgemaybe stampedM12B1orM12B2.The

tmalleableiron.TheM12B,like theM12,ismadeot bronzebut

hanicaltimetuzeM43A2.

RING.

fuzeslisted inthefollowingparagraph

mponentsoftheroundsfor thisgunare

ed,uponremovingpackingmaterial.


/ h t t p : / / w w w . h




DJUSTMENT.

efuzes,whicharealikeexceptfor

designfeaturesof thedelaymechanism,

rquickanddelay.Functioningdepends

ze.However,bothactionsareinitiatedon

thatif thefuzeisset forsuperquickaction

ell willfunctionwithdelayactionrather

rovideforadjustment,thereareon the

ase,aslotted"settingsleeve"andtworegis-

SQ"(superquick),andtheothermarked

Q,"asshipped.Toset fordelayaction,

turned sothattheslot isalinedwith

corporatedinthedelayactiontrain

on.)Thesettingmaybe madeorchanged

orsimilarinstrument.Thiscanbedone

ositionoftheslot paralleltothefuze

anglestheretofor"DELAY."

51A4.Thisisessentiallythe fuze

mbledtoit andhandledasaunit withthe

heshell,thefuze issimilarin appearance

dinaction,to theM48-seriesfuzes.

sameasdescribedinsubparagrapha

3fuzehastwoactions,timeand

ckactionisalwaysoperativeandwill

priorfunctioninghasbeencausedbytime

raduatedfor 25secondsissimilarto

rain fuzes.Asafetywireextendsthrough

eplungerduringshipment.Priortofiring

me-setting,thesafetypullwiremust be

pulllowerendof thewirefromthehole

ofthefuze).As shipped,thefuzeisset

ickaction,thegraduatedtimetrainr ing

ettingor,sincethesuperquickactionis

oatimelongerthan theexpectedtimeof

uired,thegraduatedtimetrainringis set

eansofafuzesetter.To preventextreme-

rnal safetyfeaturepreventsthetimeac-

ldthefuzebe setforlessthan0.4 second.

ortimeaction,thesettingshouldalwaysbe

of0.4second.NOTE:Roundsprepared

uldberestoredto theoriginalcondition

andpacking.Suchroundsshouldbeused

ordertokeepopenedpackingstoa


/ h t t p : / / w w w . h




ment

vedinFiringM IK-andM55-series

iesfuzesare firedduringextremely

ywithhigh-velocitycannon,premature

ichwillresultinanair burst.Therainfall

malfunctioningisdifficulttodefineinprac-

withtheexceedinglyheavydownpourscom-

mmerthundershowersintheUnitedStates.

deficiencyofthefuzes issuchthatit can-

osingthedesiredsensitivityof impactat

M48-seriesfuzes,occurrenceofpremature

ringundertheconditionsdescribedabove

ayaction,makingthesuperquickactionin-

annotberemedied,however,sincethe

ysoperative.


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TORAGE

IONS.Preparationfordomesticship-

sameaspreparationforlimitedstorage.

byrailincludesinstructionsforloading

blockingnecessarytosecurethevehicleon

eight,andotherinformationnecessaryto

leforrailshipment.Formore detailed

ationforindefinitestorage,refertoAR

MITEDSTORAGEORDOMESTIC

dforlimitedstorageordomesticship-

tof serviceforlessthan30days, ora

foroperationon call.Ifthevehicleisto

shipmentbyrail,it willbepreparedfor

ion.

cedinlimited storage,takethefol-

telylubricatetheentirevehicle(par.

teriesandterminalsforcorrosionand,

oroughlyservicebatteries(par.172).

rationforlimitedstoragewillinclude

es,after thebatteryandlubricationserv-

onditionofthevehicle.Correctanyde-

peration,beforethevehicleis storedor

thesteeringlevers,statingtherepairs

onditionpresent.Awrittenreportof these

theofficerincharge.

otnecessarytoremovethefuelfrom

ystorageorshipmentwithinthe United

nder InterstateCommerceCommission

thetanksexceptwhenstoringinlocations

herlocalregulationsrequireremovalofall

Whenpossible,partiallydisassemble

ddip,spray,orbrushthe partswithrust

ht).Assemblethebreechmechanism.


/ h t t p : / / w w w . h




nthebore ofthe90-mmgunwith

oroughlydry.Swabtheborewith rust

ht).Sealthemuzzlewithnon-hygroscopic

muzzlecover,ifavailable,andseal with

tape.Ifa muzzlecoverisnotavailable,

rappingpaperoverthetapeandseal with

tape.

LES.Ifpracticable,removerustappear-

with flintpaper.Repaintpaintedsurfaces

otectwoodormetal.Coatexposedpolished

etorustwithrustpreventivecompound

s,hatches,andvisionslots. Makesure

rmlysecured.Leaverubbermats,suchas

d,inanunrolledpositionon thefloor.

rtoolsandfire extinguisherswillremainin

atmentofsmall armscarriedonor

epertinenttechnicalmanuals.

ystematicinspection,justbeforeship-

e,toinsureall abovestepshavebeencov-

readyforoperationoncall.Makealist

itemsandattachittoone ofthesteering

perationService"(par.38).

esandchockthetracks.

orage.Whenvehicleisplacedin

ebatteriesweekly.Ifwaterisadded to

gweatherisanticipated,rechargethebat-

geror removethemforcharging.Donot

eriesbyrunningthe auxiliarygenerator.

iclewithflintpaper.

KINGFORRAILSHIPMENT.

tothe preparationdescribedinpar-

cevehiclesarepreparedfordomesticship-

rationandprecautionswillbetaken:

odyofthevehiclewitha canvas

sanaccessory.

ctthebatteriestopreventtheirdis-

cident.Thismaybeaccomplishedbydis-

ad,tapingtheendofthe lead,andtyingit

y.

scontainingOrdnancevehiclesmust

MP."


/ h t t p : / / w w w . h




oge

quirementsforKailShipment


/ h t t p : / / w w w . h





ncevehiclesmaybeshippedonflat

de-doorcars,ordrop-endgondolacars,

tconvenient.

NG.Wheneverpossible,loadandun-

s,usingpermanentendrampsandspan-

tfromoneflatcartoanotheralongthe

epossiblebycross-overplatesorspanning

tendrampis available,animprovised

lroadties. Vehiclemaybeloadedina

ndsbyusing acrane.

ANCE.Ifa flatcarisused,position

brakewheelclearanceofat least6inches

anone vehicleisloadedoncar,locate

amannerastopreventthe carfromcarry-

pplythebrakesandplacethe transmis-

curingorblockingavehicle,three

wise,andbouncingmustbeprevented.There

sofblockingthevehiclesonfreightcars,as

urblocks(B,fig.264),oneto the

feachtrack.Nailtheheel ofeachblock

0-pennynails.Nailtheportionof each

ckto thetarfloorwithtwo 40-penny

(C,fig.264)oneachside ofthevehicle

k.Nail eachblocktothecarfloorwith

seblocksmaybelocatedonthe insideof

rrant.

oblocks(F,fig.264),oneto the

fthetracks.Theseblocksareto beat

llwidthofthevehicleat thecarfloor.

ainsttheblocks(F)to thefrontandto

the lowerblocktothefloorwiththree

blockto thelowerblockwiththree40-

C)asdescribedin step(1)above.

pervehicle245sq ft

cle2,511cuft

e66,000Ib


/ h t t p : / / w w w . h





ES.Thefollowingpublications

edfrequentlyforlatestchangestoor re-

giveninthis listofreferencesandfornew

terielcoveredinthismanual:

Catalog(explainsSNL

C

rsupplyindex(indexto

SI

dcombinations,andper-

beticallistingofOrd-

mbinationswithpub-

o)(supersedesvolume

artmentPublications

WO's,RR's,SB's,

s,T/A's,TC's,

blesandcharts,

andrevisions,person-

dpamphlets)FM21-6

rips andfilmbulletins

serialnumberand

raphictraining aids,

ays)FM21-8

CLATURELISTS.

un,M36B2SNLG-237

gsandrelateditemsSNLH-12

ngandlubrication

ecialoils,and

msSNLK-l

SNLK-4

ment,accessories,

LK-3


/ h t t p : / / w w w . h





dwareSNLH-2

andweldingmate-

msSNLK-2

eSNLH-l

epairofautomotive

cles:

,motorvehicles....SNLG-27

n),specialists'andSNLG-27

edandsemifixed,in-

k,lightandme-

ndantitankartil-

ounddataSNLR-l

nk,forpack,light

,tank,andanti-

uctionmaterialfor

ld,aircraft,tank,

R-6

NLC-69

andMount,com-

ndT99E2SNLD-39

owning,M1917A4,

AS,fixedand

dmountsSNLA-6

owning,M2,heavy

GroundmountsSNLA-39

31,M32,M33,and

1(M69)SNLF-311

NLF-281

PSNLF-235

2SNLF-214


/ h t t p : / / w w w . h





CATIONS.

s.

M10-580

uideTM9-1904

9-1900

-1901

uments(fieldglasses,

ndglasses)TM9-575

eofammunitionTM9-1907

alTM37-250

al..30,HB,M1919A4

les)FM23-50

al..50,HB,M2

les)FM23-65

ballbearingsTM37-265

andpoweredground

858

5

ngTM21-300

M1-455

msdataTM9-2200

hoptoolsTM9-867

850-15

andpreventive

37-2810

eldFM9-5

ammunitiontraining

1-455

gammunitionfor

eAR750-10

M9-1990

ehiclesTM9-2800

cidtypeTM9-2857

454

andriflerangecon-


/ h t t p : / / w w w . h





combatvehiclesTM9-374

aliber.30HB,

mbatvehicles)FM23-50

aliber,.50HB,M2

les)FM23-65

r.

icatingandwelding

sissuedbythe

M9-850

neumatictiresand

ectricalequipment

A

ectricalequipment

reExtinguishers....TM9-1799

eneralMotorstwin

mediumtanks

M9-1750G

ullandturret,elec-

spensionfor

sM10andM10A1TM9-1750L

ydraulictraversing

ediumtankM4

731G

owertrainunit,

ormediumtanks

andrelatedgun

0B

peedometers,ta-

sTM9-1829A

ncompanyFM3-70

0

redforcevehicles....FM17-59

attackFM21-40

sFM5-25

emicalagentsTM3-215


/ h t t p : / / w w w . h





FM9-25

shipping(posts,

-2854

pmentchart,group

G

rdnancematerielfor

aterielinopen

clesAR850-10

gofmechanized

ment,alsomajor

tesArmyand

entpublishedby

nceDepartmentof

ailroads.

quipmentAR850-18


/ h t t p : / / w w w . h





ssion..

e

nce228

30

39

re-


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and

66

89

15

3

tor401

lacement399

506

t448

nect319

5

r323

e435

esand

thers)

nderas-

arings90

14,448

els9

x

4

est115

nts289

96


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95

295

120

20

4

66

7

64

0

inpro-

95

myuse69

st113

311

r456


/ h t t p : / / w w w . h





shooting139

ve143

96

4

dtest115

rplates454

shpanel453

minalboxes414

8

132

t-115

es149

zing227

ocedures25

8,100

93

96

iary470

serv-

130

anifolds)

flers,ex-

4

on239

t174

instal-

nstal-

01

94

51

8

or456 P u b l i c D o m a i n , G o o g l e - d i g i t i z e d

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92

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n)

92

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tor)121

93

nstal-

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s,fuel)

moval206

05


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9

94

01

94

6

96

rolhandle54

hanism

cket

etas-

6

ment392

142

93

tor)

6

record-

tor

eration128

16

218

just-


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d.

m129

din-

ism169

k213

8

210

n,and

11

3

93

96

em5

ontrol

xiliary)470

478

94

s402

93

ox

19

402


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ent

er)113

435

nismbrake435

ectric90

instal-

8

92

er65

instal-

12

adtest.116

56,26?

93

56

e

55

6


/ h t t p : / / w w w . h




ox

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...«......._________ ......118

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ssion


/ h t t p : / / w w w . h





onnect328

ft379

00

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6

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95

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93

entof

02

2

es24

elescope

ano-

t118

93

5

79

75

131

fcon-

291

5

94

2

94

1


/ h t t p : / / w w w . h





00

94

80

282

95

11

bes311

12

ssembly

3

andles54

96

and

34

48

apacitor448

re-

motor.90

r54

07


/ h t t p : / / w w w . h





0

0

63

erator)124

TM 9-745 90MM MOTOR GUN CARRIAGE M36B2

Documents

Transcript of TM 9-745 90MM MOTOR GUN CARRIAGE M36B2