Tm 9-747 155-MM GUN MOTOR CARRIAGE
Transcript of Tm 9-747 155-MM GUN MOTOR CARRIAGE
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NICALMANUAL
RIAGE
ER
Publ
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NICALMANUAL
RRIAGE
ER
BRUARY1945
TONOFRESTRICTEDMATTERNOpersonisentitledsolely
ositiontoknowledgeorpossessionof classifiedmatter.Such
those individualswhoseofficialdutiesrequiresuchknowledgeor
graph23b,AR380-5,15March1944.)
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ebruary1945
otorCarriageT83and8-inchHowitzer
ishedforthe informationandguidanceof
TARYOF
AGF(10);ASF(10);Depts(10);AAF
S DivASF(1);TechSv(2); SvC
(5);Dist O,9(5);DistBr O,9
hments,9(5);DecentralizedSub
10);USMA(20); A(10);CHQ
6-125(2), 6-127(3),6-129
3),9-57(3),9-65 (3),9-67
97 (3),9-317(3),9-325(2),9-327
ls,seeFM21-6).
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..........1-25-8
...3-58-11
c-
-21
INSTRUCTIONS
.........1022
22-27
ts...14-1527-33
ary
34-37
ual
37-41
41-42
ANCEINSTRUCTIONS
.........2443
tools
43-45
6-2746-53
nce
53-82
..35-4782-97
ddata.48-4997-99
99-108
e.......52-53108-111
ystem..54-62111-120
...63-69121-132
0-80133-141
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NCEINSTRUCTIONS(Cont'd)
tem81-83142-143
ystem.84-93143-154
67
n101-102167-172
niversal
naldrive
00
pring
220
21
130221-224
226
t137-138226-227
on139-143228-230
ons144-152230-238
ontrol
49
4249-260
es165-167260-264
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publishedforinformationandguidance
theoperationandmaintenanceofthisequip-
tedbydescriptionsofmajorunitsand tneir
ercomponentsofthis vehicle.Theyapply
MotorCarriageT89,and tothe155-mm
ndarearrangedas follows:PartOne,Intro-
ngInstructions;PartThree,Maintenance
,Armament.
ofthemanualcontainsalist ofrefer-
nomenclaturelists,technicalmanuals,and
bletothevehicle.
cableforusein performingprescribed
w,withabrief explanationofeach.
O.7360,ARMYMOTORVEHICLE
formwillbe issuedbycommanding
tations,ororganizationstoalloperatorsof mili-
ssedthedriver'sexamination(TM21-300)
theparticularvehiclesnotedonthepermit.
BRICATIONORDER.WarDe-
erNo.9-747prescribeslubricationmainte-
bricationOrderisissuedwith eachvehicle
atall times.
26,DRIVER'SREPORTACCI-
TATION.Onecopyofthisformwill
alltimes.Incaseof anaccidentresultingin
,itwill befilledoutbythe driveronthespot,
thereafter.
RMNO.48,DRIVER'STRIP
MAINTENANCESERVICEREC-
xecuted,willbefurnishedtothedriver
hedonnontacticalmissions.Thedriverand
willcompletein detailappropriatepartsof
dnotbe issuedforvehiclesinconvoyoron
ructionswiththemateriel,thistechnicalmanualhas
eofcompletetechnicalreview.Anyerrorsoromissions
esor,if extensive,byanearlyrevision.
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rriageJ83
CarriageT89
torCarriageT83,and
riageT89
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nchHowitzerMotorCarriage789
ersesideofthisform containsthedriver's
vemaintenanceservicereminderschedule.
O.478,MWOANDMAJORUNIT
TRECORD.Thisform,carriedwiththe
personnelcompletingamodificationor
ne,transmission,transfercase,tracks,etc.)
arlythedescriptionofworkcompleted,date,
ge,andMWOnumberornomenclatureof
performingtheoperationwillinitialinthe
pairs,parts,andaccessoryreplacementswill
O.6,DUTYROSTER.Thisform,
edforschedulingand maintainingarecord
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perations.Itmaybeusedforlubrication
O.462,PREVENTIVEMAINTE-
HNICALINSPECTIONWORK
NDTANK-LIKEWHEELED
eusedforall 50-hour(500mile)or100-
,andfortechnicalinspectionsofthese
O.9-70,SPOT-CHECKINSPECTION
VEHICLES.Thisformmaybeused
sortheirstaffrepresentativesinmakingspot-
ehicles.
O.468,UNSATISFACTORYEQUIP-
willbeusedforreporting manufacturing,
ctsinmaterielwitha viewtoimprovingand
ndforuseinrecommendingmodificationson
be usedforreportingfailures,isolated
nctionsofmaterielresultingfromfairwear
age;norforthe replacement,repair,orthe
nt.It doesnotreplacecurrentlyauthorized
cerecords.
O.9-81,EXCHANGEPARTORUNIT
stag,properlyexecuted,maybeused
ceableitemsforlike serviceableassemblies,
NMODELS(figs.1and 2).
dels.The155-mmgunmotorcarriage
ermotorcarriageT89are identicalvehicles
ghtingequipment.Bothvehicleshaveuni-
arryingrackstocarry155-mmor8-inch
emaybechangedfromthe155-mmto the
rsa,andtherecoiland equilibratormecha-
y.Thetubeinstalledis,therefore,theonlyfac-
therthevehiclecarriesaT83or T89desig-
d2).
armored,full-tracklayingvehicle
mgunMlor M1A1,orthe8-inchhowitzerMl
for acrewof8men.The 155-mmgunorthe
edontherear ofthegunmotorcarriagesimilar
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arriageM12.The T83orT89vehicleis in
noftheM12,basedon themajorcomponents
Thevehicleis designedwiththedriver's
theenginecompartmentinthemiddle,and
attherear.
ehatchdoorsaremountedontop and
andprovideaccesstothedriver'sand assist-
or.Thevehiclesareequippedwithan
hullfloor behindtheassistantdriver'sseat.
othhatchesareclosed,directvision
sin thehatchcupola,andindirectvisionis
hdoor.
ehiclesareequippedwithradiofor
orintratank,communication.
cle.Thevehiclesarepoweredbya
er,radialgasolineengine.Theengineis
e vehicle,andisaccessiblethroughahinged
d twoinspectionplatesinthefloorof the
partment.
etankserialnumberis locatedon
thedriver'sseat.
padeassemblyisanchoredtotherear
bracket.Whenthespade isin"UP"position
fthefightingcompartmentinthevehicle.The
oweredpositionformsa rampassemblyand
keepthevehicleinpositionwhenthegun is
redbyahand-operatedwinch,locatedinthe
cle.
hehand-operatedwinchisusedto
ssembly.
T83)
Viin.
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l
dial,air-cooled
0
uin.
m
m
rear)Clockwise
30
k
1,550Ib
efueling107
higher
matequartsperhour)2
tialoilcapacity38gal
donhardroad24mph
nespeed2,400rpm
eed800rpm
gability60%
ngability60%
6in.
er83ft
e(forwardandbackward)34in.
orwardandbackward)92in.
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cessories
thtracks7,544sqin.
k86
persquareinch)10.2
Differential).
mission
DACCESSORIES
reforinformationonlyand mustnot
isition.
83only,thelists fortheT89will vary
he 8-inchhowitzer.
ockNumberStowageLocation
277)Onenginedeck
x Onenginedeck
Onenginedeck
dleOnenginedeck
on
S-3170)Onenginedeck
eOnenginedeck
ghtsponson
ass't.driver's
ch,Intoolbag
54)
t.,"
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ockNumberStowageLocation
t.,Intoolbag
t.,%in"
309-20)
nd,cold,"
2-V,
32)
thcut,"
thcut,"
en,2-lb"
en,1-lb"
H-1115)
,hinged"
H-1502)
,ratchet,Va-in"
5)
,ratchet,"
6)
,speeder"
,T-sliding,"
1-H-1509-54)
niversal,"
wire-cut-"
cutting"
uarter,1Va-in"
uarter"
,normalduty,"
xtra-heavy"
85)
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cessories
ockNumberStowageLocation
,8-inIntoolbag
,12-in"
,44s/8-inOnenginedeck
nter
dble.head,Intoolbag
0)
dble.head,"
1000)
dble.head"
005-5)
dble.head,"
008)
dble.head,"
015)
dble.head,"
21)
dble.head"
028-10)
x.%2-in"
x.,Vi-in"
sqdrive,"
)
.sq.drive,"
sq.drive"
9)
sq.drive"
sq.drive,"
)
sq.drive"
)
.sq.drive,"
)
.sq.drive,"
.sq.drive,"
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ockNumber.StowageLocation
sqdrive,Intoolbag
9)
sqdrive,"
)
sqdrive,"
7)
sqdrive"
)
41-B-225)Ingunchest
in.long"
in.long"
-200-700)
-lb(41-H-473)
t(4 l-P-3606)...."
ents)"
tents)"
0.046x%"
'swoodhandle"
n.sqdrive,"
20),con-
%-in.
ong
x.,%2-in"
x.,Vi-in"
x.,%6-in"
bolthead,"
)
rodnut,4V2-in"
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cessories
ockNumberStowageLocation
bittypeIn gunchest
0)
t"
4l-W-3248-251)...
1-W-1596-50)
NT(T83ONLY).
90)
-992-659)
qt(42-B-25520)Inbracketon
contentsInbracketleft
of
ose enginecompart-
00)mentroof
-C-395-625)
ocontents)
%pt
00)
valve
m
ad,
012)
C-1058-875)Onborebrush
hon
4-C-1847-367)...Onmuzzle
gandunloading,...Ingunchest
41-H-1826-360).."
389)
by(21-L-106-200)..
18)"
erseat
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ockNumberStowageLocation
R-184-240)Onmuzzleover
6535)Ingunchest
3(73-3A44)
n(41-S-4658-120).."
howitzerMl)...."
nBook,O.OInpamphletbox
D75994)
167298)Inright rearhull
ition.
ATELOADING)FOR155-MM
H.powder 8inpowdercompt,
container)rightside hull
82-0-41)
edet.H.G.M6)
C13-17-3)
nboxes(07032-
oosterM21A2.
1-grain,Mk.IIA4.
-mmgunM101.
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cessories
ockNumberStowageLocation
-36-1A)4onlids ofpowder
8Inbox(D7032-
1 InmountT14
plete,composed....Inbracket(7055-
er'scompart-
4160)ment
squadrant,Onrearofright
8)(forIn gunchest
7691403)
elescopeInbracketsonrear
ope(D40871)OnmountT14
forquadrant....In chestM21
forpanoramic..."
fortelescope...."
fortelescope...."
mountT14
2(left)(telescope"
escopeM12)
4(right)"
)1indriver'scupola
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ockNumberStowageLocation
ete,composed...Verticalrackon
1(D37993 )
Ml(15-12M)Inbracketonright
M14,com-In chestM21in
0)
2)
79389)
nMlor M1A1,...Ingunchest
rd(RF-ll-ED)
WB)
(l-T-283-375)"
6A1FIncase(D40871)
-222)IncaseT16onleft
,M12(91-92)Incase(D40871)
dnomenclature...Inpamphletbox
G.O.(incontainer"
155-mmgunMl"
75-C4engine"
icle(foroperator)"
rtment,No.9-747..Intechnicalman-
/cover
ntRC99Inrightsponson,
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cessories
ockNumberStowagelocation
Shippedloosewith
R-610,SCR-619,..Inrightsponson,
t.driver's
loosewith
edloosewith
2,4-lb1indriver'scom-
1in
nating,1Vi-qt1in bracket,asst.
3777)Inasst. driver's
est,lighting,
Oncrewseats
g,19-qtRearofengine
al,stdOnhullfloorunder
rnerfront
osetype,
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ockNumberStowageLocation
85)2inbracketsin
e,No.2,Ingun chest
230-5)
5-ozcapIn toolbag
cle,12unit2in bracketright
t)(LM-35A).. .Intoolbag
45 ftOnguntubebe-
spout,In bracketonfloor
com-
er,1qt Rightrearhull
P-29)Ontopof leftshell
e,1burner,Inbracketunder
No.520
de,30-ftIntoolbag
-T-13600)"
ack,14-ga.,
r 8men)orLeftfront chest
r8 men)Leftrearchest
men)Leftfrontchest
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cessories
RTS.
ockNumberStowageLocation
rdriver'sInbox(B82340)
river
track)(7069543)Inrightfrontchest
8volts,Intool bag
ack)(7069545).In rightfrontchest
k)(7069549)
0track)(C139817)
Vs-inIntool bag
(7669401)In box(D82340)
)Indriver'scom-
ereticleInchest,light, M21
embly,MlIngunchest
or)(C70484)"
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NSTRUCTIONS
mationforguidanceofpersonnelre-
hisequipment.It containsinformationon
ithdescriptionandlocationofcontrolsand
OFEQUIPMENT
reconditionedvehicleisfirst received
tis necessaryforsecondechelonpersonnelto
hevehiclewilloperatesatisfactorilywhen
urpose,inspectallaccessories,subassem-
ndequipmenttoseethatall areinplaceand
tion,theywillperformarun-intest ofat
inAR,850-15,paragraph25,tableIII,
nparagraph12below.
es.Deficienciesdisclosedduringthe
illbetreatedasfollows:
eswithinthescopeofthemaintenance
zationbeforethevehicleis placedinservice.
yondthescopeofthemaintenanceechelon
oa higherechelonforcorrection.
riousnature totheattentionofthe supply-
ES.
eethatportableandfixedtanksare
nes,andnozzlesaresecurelymounted,and
y aimed,andnotclogged.
kfuelintank,andseethat oilisatproper
hedtothetank fillercapconcerningcon-
nsonthetag beforestartingtheengine,when
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quipment
rometertest,andaddcleanwaterto
eded.Inspectterminalconnectionsandbolts
ndsecure.
EATHERCAPS.Examinecrank-
buretoraircleanerstosee iftheyarein good
moveoilcups,washcupandelementsindry-
reservoirstoproperdepthwith freshengine
ctsandair hornconnectionsaretight.
LTS.Seethataccessoriessuchascar-
ngmotor,generator,andfiltersaresecurely
torbeltisadjustedto Va-inchdeflection
movesilicagelbagsfromenginecompart-
Examineallaccessiblewiringand
ingoodcondition,securelyconnected,and
KS,CONNECTORS,WEDGES,
theseitemsare ingoodcondition,cor-
ure.Onvehiclesequippedwithhorizontal
dbeno bulgeintracksbetweentheidler
nsionwheels.CAUTION:Donotadjust
edwithhorizontalvolutespringstootightly.
ANDFLANGENUTS.Examine
tion,properassembly,andsecurity.
ndersforgoodconditionandsecure
ONS.Inspectpintlehook,cables,and
onditionandproperoperation.
RMORPLATE(ENTRANCEAND
NS,PAINT,ANDMARKING).Inspect
morplateissecurelywelded,thatentrance
teproperly,andthattheyarewelllubricated.
nescapehatchlatchduringinspection.
andclosefreely,thatthereareno brightspots
ndthatmarkingsarelegible.
WINCH.Inspecttheseitemstosee
ditionandthatallattachingmechanismis
nethewinchcablestoseethattheyarenot
cables,sheavesandrollerareproperly
rampslides freelywhenrampisinlowered
gpins holdrampsecurelywheninraised
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DBOWS.Besurethatallprotective
nmaterialhas beenremovedfromgunand
ockreleasedtesttraversingandelevating
peratesproperly.Besure tolockgunsecurely
ng.If inuse,seethatbowsare properly
aulinis securelyfastened,ifnotinuse,tar-
operlystowed.
ureallprotectivetapehasbeen re-
opesaresecurelymountedintheir holders,
odconditionandproperlystowed.CAUTION:
onlywitha softclothorbrush.
acompletelubricationofthevehicle,
rdingtoinstructionsonLubricationOrder,
rcaseoillevels.Addoil togearcasesasneces-
vels.Changeonlyifconditionofoilindicates
tofproper gradeforexistingatmospheric
ormitems(16)to(19)duringlubrication.
NSIONS.Inspectvolutesprings,
ensionwheels,supportwheels,andwheeltires
.Onvehiclesequippedwithhorizontalvolute
absorbers,andseethatthe aboveitemsare
yassembled,andsecurelymounted.See
arenotleakingexcessively.
pplytheleverstogetherandinde-
uldbe4to 4l/zinches,andleversshouldmeet
heverticalposition.Checkreleasedposition
ctlypositionedwhenhorizontaldistance
ousingcovertofront edgeofleveris 7to7Vi
geandconnectionsforgoodconditionand
NIVERSALJOINTS,AND
haftanduniversaljointstosee thatthey
curelymounted,andthatventsare present
urncrank50timestocheckfor
primer,ifnecessary,andstartengine,
hassatisfactoryspeedandengagesand
andthrottletorunengine atafastidle.
gengine,observeifprimeractionis
eaksatpumpor connections.
neoilpressure mustbeindicated
essure mustbe40to70 poundsat1,800
nute.Stopengineimmediatelywhen"low
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quipment
g,ammetermayshowhighcharge
g isrestoredtobatteries;then,if battery
ssoriesareturnedoff,azero,or slightcharge
eGage.Readingshouldrisegradually
normalrange,whichshouldnotexceed
movevehicleuntiltemperatureis100F
ge.
etershouldregisterenginespeedin revo-
ordaccumulatingrevolutions.
ectorswitchinrelativeposition;gage
ateamountoffuelineachtank.Ordinarily,
nd gageshouldregister"FULL."
Observewhetherornot engine
ndacceleratorpromptlyandproperly,and
essorbinding incontrols.
ne andoperation.
REFLECTORS.Besureall pro-
ovedandobservewhetherornot alllights,
plights,respondtothe switchesinboththe
xaminetheinsideofenginecompart-
ndcheckallaccessiblelinesandseals forfuel
ENT.ChecktoolsandOn-vehicle
besure allitemsarepresent,andsee that
roperlymountedorstowed.
ocedures(1)to(10) inclusive,during
e.Onvehicleswhichhavebeendriven50
eofthedeliveryfromthe supplyingtothe
ethelengthoftheroad testtotheleast mile-
servationslistedbelow.CAUTION:Con-
gineatspeeds approachingthemaximum
ateshouldbeavoidedduring thetest.
DGAGES.Donotmovevehicle
ereaches110F.Observereadingsofoil
fuelgage,andtachometertoseeiftheyregister
nits towhichtheyapply.Withthevehicle
ershouldregistervehiclespeed,andthe
accumulatingmileage.
DPARKING.Steeringbrakes
elywithVaratchettravelinreserve.With
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kingbrakelock,depressclutch,andpull
ingbrakemustholdvehiclewithV2 ratchet
sremainin appliedposition.Applysteering
noticewhetherornottheysteerthe vehicle
otdrag,andshouldengagewithout
tter.Testclutchforslippageunder load.
approximately13Ainches.Shoetorelease
beVsinch.
shiftmechanismshouldoperateeasily
dnotslipout ofmesh.
strespondto controls,andhave
ithoutunusualnoise,stalling,overheating,
onthealertcontinuallyforunusual
oosenessoftracks,bogies,sprockets,oridler
ILEINTERVALSFORSERV-
ehandcautiouslyoneachsupport
eelhub,tofeelwhetheror nottheyareabnor-
e toohottotouchwith thehand,bearings
cated,damaged,orimproperlyadjusted.On
rizontalspringsuspension,shockabsorbers
evehicleisbeing operated.Ifshockabsorb-
uringoperation,it isanindicationthatthe
bsorbersarenotfunctioning.Checktrans-
overheatingor excessiveoilleaks.
ngineandfightingcompartments,
ndallvisiblelines,for fueloroilleaks.Trace
andremedyor reportthem.
pecttracksforsatisfactorytension.
horiontalvolutesprings,thereshouldbeno
lerwheelsandrear suspensionwheels,and
dtheforwardsuspensionwheels.CAUTION:
tedtootightly onvehiclesequippedwith
Besureadjustmentlockingdevicesare
dReports.
atvehicletechnicalmanuals,Lubrica-
No.26(Driver'sReportAccident,Motor
A.G.O.FormNo.478(MWOandMajor
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entRecord),areinthe vehicle,legible,and
.S.A.registrationnumberandvehicle
edinonFormNo. 478,fornewvehicles.
etionoftherun-intest,corrector report
eportgeneralconditionofthevehicleto
thority.
ENTS
.3).Twofuelshut-offcontrolsare
eft sidesofthefrontbulkheadin thedriver's
trolsareconnectedbylinkageto thefuelshut-
bottomofthe verticalfueltanksintheengine
ON"positionsareindicatedonthe valve
r-typeprimingpumpisbracket-
t theright,andinfront ofthedriver.The
uel tank,andforcesittothe primerdistribu-
chargeoffuelisdistributedto thetopseven
ng.
-pulltypehandthrottleis bracket-
pump,andconnectedbyacableto anarm
rolthecarburetorthrottle,whichopensmanu-
quippedwitha springcatchsothatthe
gcanbesetin afixedposition.
.Thefootacceleratorismountedon
fthedriver,andis connectedbylinkagetothe
thecarburetorthrottleisregulatedto control
pedal,whichismountedonthe sub-
stablelinkagetothecrossshaft, through
nbedisengagedtodisconnecttheengine
fting gears.Alinkageconnectionwiththe
inetoidlemoreslowlythannormal toreduce
g.Thepedalisspring-loadedandwill return
enfootpressureis relieved.Anovercenter
dforeasier operationoftheclutchpedal.
Lever.Thegearshiftleverismounted
ransmission.Itis usedtochangegearratios
operationofthe vehicle.Theleveris
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ontrols
htopreventaccidentalshiftinginto first,or
Twohand-operatedleversmountedon
dbylinkagetothe brakeshaftswhichoperate
aldrive.Therightlevercontrolsthe right
ntrolsthe lefttrack.Whenoneleverispulled
ownandthe speedoftheothertrackis in-
besloweddown,orstopped,bypullingboth
y.
Whentheparkingbrake pedalis
ngbrakeleversareheldin anysetposition.To
kickthepedalto therear.
4-voltand12-voltbatteryswitchesare
masterswitchboxwhichismountedonthe
boxon theleftsponson.Operatinginstruc-
ormationappearonthefaceofthe switch
tchAssembly(fig.5).Thisassembly
t corneroftheinstrumentpanel.
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sthe magnetos,andismarked"OFF,"
rrightmagneto,and"BOTH"forboth
aremarked"BOOSTER"and
erationofthe boostercoilandthecranking
ngtheengine.NOTE:Theboosteris used
o-equippedengines.
g-loaded,andwillreturnto the"OFF"
heboosterswitchisoperatedinconjunction
TARTER"toproducesufficientignition
eengine.
5).The fuelcut-offswitchiscontrolled
on thelowercenteroftheinstrumentpanel.
degasser)solenoidvalveon thecarburetor
eengine.
The mainlightswitchismountedin
heinstrumentpanel.Asafetybuttonispro-
allightingofunwantedlightsundercertain
witchhasfivepositionsmarkedasfollows:
ight
ers
used)
5).Thisswitchis locatedintheupper
ntpaneland hasan"OFF"positionandfour
RIGHT,"tocontroltheindirectlightingof
hecompass.
Circuitbreakersareprovidedfor the
cletoprotectthe wiringandequipmentfrom
dsorshortcircuits.Thecircuitbreakersare
e instrumentpanel,withfiveresetbuttons
erofthe panel.Identificationofthecircuitis
hbutton.
outletislocatedattheupper leftof
sprotectedfromdirt anddamagebyaplug
ypesocket.Theoutletisusedfor connecting
elights,etc.
.Anemergencystopswitchislocated
oxandits functionistogroundthe magnetos
immediatestop.
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uelgageismountedtothe extreme
sinthecenterof theinstrumentpanel.The
nectsthegagetotherightor leftfueltanksis
egage.Thegagewillindicatethe amountof
s,whentheselectorswitchis turnedto"R"
).Theoilpressuregageis mountedon
ediatelytotherightof theammeter,and
ctricallythroughavaryingresistance,con-
essureagainsttheendofthe oilpressure
heoil passageontheengine.
gLight(fig.5 ).Arubywarninglight
corneroftheinstrumentpanelto indicate
isconnectedtoaswitch-typesendingunit
enthe2 4-voltbatteryswitchisturnedon,
glight willburnuntilthe enginestartsand
etrouble existsintheoilingsystem,allow-
p,thewarninglightwill burn.
Gage(fig.5).The engineoiltem-
onthe instrumentpanelbetweentheoilpres-
s gageismarkedindegreesFahrenheitfrom
hetemperatureoftheengineoil.Thegage is
esistance-typesendingunitmountedonthe
actuatedby thetemperatureoftheengine
indicatetheoiltemperature.
mmeteriscalibratedto ashuntlocated
nd readsdirectlyinamperesona zerocenter
from50to 100oneachsideof thecenter
fiedas negative()totheleftof zero,and
zero.Theamountofcharge(+ )ordis-
atteryisindicatedon themeter,depending
ator,conditionofthebatteries,orthenumber
use.
espeedometerismountedon thelower
panel.It indicatesthespeedofthevehicle
trip mileage.Thespeedometerisdrivenby
pterin thetransmission.
etachometerislocatedonthelower
tpanel.It indicatestherevolutionspermin-
tal revolutionsoftheenginewhentheclutch
erisdrivenbya cablefromanadaptercon-
thetransmission.
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ARYCONDITIONS
SANDCONTROLSINVEHICULAR
Equipment.Beforeanewora recon-
nservice,besure thenewvehiclerun-intest
1,12and13 hasbeenperformed.
ce.Performtheservicesinitems1to 6
emptingtostart theengine.Startandwarm
)andcompletetheBefore-operation
hasstood for6hoursor more,testfor
temptingtostarttheengine.Attemptto
dcrank.Ifthe enginewillnotturn,refer to
verinneutral.
t-offvalvecontrolsonthebulkheadin
yswitch.
out aboutl/zinch.
andleoutslowly,andpushit inbriskly
eengine.Thenumberof strokesrequiredwill
eoftheengine.
dalalltheway down.
chinpositionmarked"BOTH"(fig.5).
s(fig.5) marked"STARTER"and
"ON"positionand holdtheminthis posi-
butfornotlongerthan 10seconds.Ifthe
ethe switchesandallowthecrankingmotor
throttleallthewayout, turnoffthemagneto
hmarked"STARTER."Cranktheengine
inatethepossibilityoffloodingor over-
ostart theengineagain.Aftertheenginehas
rasrequireduntil theenginerunssmoothly.
dal.
minutesat800revolutionsper minute
gage.Theoil pressureshouldbe40pounds.
omeupimmediatelyaftertheenginestarts,or
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yCondition,
Positions
n thegage,stoptheengineand reportthe
ty.CAUTION:Donotrimtheenginewith
peedto1,000 revolutionsperminuteand
pressureremainsat40pounds.If thepres-
eed isincreased,reducethespeedandallow
orethoroughly.
armedup,tryoperatingfirst ononemag-
r,byplacingthemagnetoswitchleverin"R"
UTION:Donotoperatetheengineon one
fthe enginerunsproperlyontheindividual
hinthepositionmarked"BOTH."
tsto seethattheyareindicatingproperly
sequippedwitha governortolimitthe
allgearsasshownon theplateonthe left
permitthevehicleto exceedthesespeeds
toavoiddamagetopowertrain andengine.
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ORWARDMOTION(fig.6).
,releasethe parkingbrake,depress
ntosecondgear.NOTE:Underordinary
soverhard-surfacedroads,startinsecond
evehicleisto beoperatedoverobstacles,
rain,orin confinedareas,startinlow-speed
uallyand,atthe sametime,depressthe
dspeed,releasetheaccelerator,dis-
fttothe thirdgear.
hrougheachshiftto highergears.
fig.6).Depressthelatchbuttonon
verandshifttothe reversegear.Engagethe
esametime,depressthe acceleratorpedal.
E.Releasetheacceleratorandpull
eleversto slowthevehicledowntoabout
theclutchpedalandshiftinto neutral.Kick
rward,andpullthe steeringbrakelevers
holdthevehicle.
e engineisoverheatedorthoroughly
dlefor5 minutesat800revolutionspermin-
elcut-offswitchontheinstrumentpanel.Hold
enginestops,then turnthemagnetoswitch
F."CAUTION:Donotstoptheengine
Shutoffthefuel valvesandopenthe24-volt
theenginespeeddrops below1,800
avoidunnecessarystrainontheengine and
enmakingaturn;shiftto alowergearif
bingorjustaftershifting toahighergear
etoregainspeed,as aslightturnwill reduce
rbeforestartingdowngrade,anddo not
2,400revolutionsperminute.
heclutchwhendriving,exceptduring
theclutchwhilegoingdowngrade, toavoid
e.
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Conditions
utof,atrenchor ditch,selecttheproper
to settlegraduallytothebottomandthen
t.
obstacle,selectthepropergearandapply
atetheclimb;thenallowthevehicleto roll
e.
hicleatmaximumspeedexceptinan
aximumsustainedspeedof21milesperhour.
atless than800revolutionsperminute
s.
ebyturningoffthe magnetoswitch.Press
tuntiltheengine stops;thenturnoffthe
.
arscan beattachedtothetowinglugs
ear ofthevehicle.Ifcablesareused, adriver
brakeleversin thevehiclebeingtowed,to
ehicleas required.
e thatitdoesnot becomefouledwiththe
orethanafewlengths withoutfollowing
edescribedinsubparagraphcbelow.
eatowbar ifthevehicleisto bemoved
.
le.
ovedaconsiderabledistance,blockthe
eceofwoodor removetheboltsfromthe
anionflange,slidetheuniversaljointand
kasfaras possible,andblockthepulley
flange.Placethegearshiftleverinfifthgear
rculationofthelubricantand avoiddamage
aldrive.
ein firstgearandaccelerateuntilboth
ythen,andthenonly,shifttohigherspeeds.
vehicleabove12miles perhour.
SUALCONDITIONS
alcontainsinformationpertainingto the
derconditionswhichinvolvefactorsthatdo
on.
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refertoFM31-25,Desert Operation;
nSnowandExtremeCold.
DSLIPPERYTERRAIN.
Inspectvolutesprings,suspension
pportrollers,pins,wedges,andtrackshoesfor
emoveallmud,ice,orsand whichmightcause
damagetothesuspensionmechanism.
racktensionandadjustslacktoVz to
pportrollers.Makesurethatthetrackidler
areingoodconditionandlockedsecurely.
keTubes.Cleanair cleanersmore
gunderdustyconditions.Inspectallcar-
amps;replacedamagedtubesandclamps.
ed,besurethat theairinletgrille isnot
cationrecordandseethatallpoints
naccordancewiththeLubricationOrder
electthepropergearforthe existing
engineata speedtoinsureasteady pull.
ordancewiththeinstructionplateontheleft
eterasa guideratherthanthespeedometer.
hrubbershoetracks,installthegrousersto
enneeded.
RATION.
asolineprocuredunderU.S. Army
deC)latestissue.Toreducethepossibilityof
nthefuellines,add Vapintofgrade3 dena-
whenfilled.
Fuel.
dandextremechangesintemperature
ltanksandcontainers.Keepthefueltanks
ucetheair spaceontopofthefuel, andto
stureintheair.Drain fueltanksumpsdaily
allcontainersareclean.Beforefilling
ragecontainersthathavebeenmoved,allow
noughso thatanysedimentinthefuel will
all dirt,snow,andicefromandaroundthe
ovingthem.Strainorfilter thefuelwhenfill-
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Conditions
ntainersclosedandavoidexposureto
orhandlingfuel.Fuelflowingover asurface
ywhichwillcauseaspark.Keepthefiller hose
etalliccontactwiththe hullwhenfillingthe
0 engineoilfortemperaturescon-
methodsofkeepingtheengineoil suffi-
tingbelow0F arelistedbelow.Giveprefer-
cordingtoavailablefacilities:
ossible,keepthevehiclein aheated
operation.
entheengineis stopped,drainthe
warmplaceuntil vehicleistobeoperated
ot available,heatoilbeforeinstallingit
TION:Attachatagtothe vehicleinstru-
nelthatthe engineoilingsystemisempty.
eand checktheoillevel.Add2*/2
allon ofoilcontainedinthesystem,immedi-
minutesto mixtheoilandgasoline
movetheoillevelgage.Notethatthe
determinedinstep1 above.Recordthe
containedin thesystemforfuturereference.
einthe oilingsystemwillincreaseoil
checktheoillevel frequently.UseSAE30
oillevelduringoperation.
ed4hoursormoreat operatingtem-
neoil,if itisanticipatedthatthe vehiclewill
more,byfollowingthesameprocedureout-
above.
NALDRIVE.UseSAE30engine
0F.Ifthe transmissionandfinaldrivecon-
AE50),drain theunitimmediatelyafter
ll warm,andrefillwithSAE30engine oil.
LERS,IDLERANDSUSPENSION
intemperaturesbelow0F,useNo.0
ntervalsspecifiedontheLubricationOrder
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IONPOINTS.Uselubricantsspeci-
er(par26).
ostart theenginewhenthebatteries
eraturesbelow30Funtilthe batteries
warmslavebatteriesareavailable.Afully
eezeattemperatureslikelyto beencountered
tadischargedbatterywillfreeze attemper-
yfreezingtemperaturesareshownbelow:
tteriesunlesstheyareimmediatelyputon
eezeon topoftheplates.
atall ignitionwiresaresecureandnot
kplugsfrequentlytoseethattheyare clean
17to0.019-inch.Replaceifnecessary.Test
)beforecrankingtheengine bydepressing
strumentpaneland listeningforabuzzing
e enginewiththemagnetoswitchoff.The
nboostercurrentif thecoilisfunctioning.
,andtightenallcableconnectionsand
rstoseethattheyare dryandproperly
andOperation.
engineoilingsystemhasbeen
heattheengineoil beforefillingthesystem.
oohot;heat onlytothedegreethat thebare
eoilwithoutburning.
ANERS.Removetheengineoilin
withhydraulicoil(U.S.ArmySpecification
om0Fto40F.For operationbelow
eratedry.
eengine,asdescribedin paragraph
edto relievetheloadofturning thetrans-
motor.Keeptheenginecompartmentcover
aturerises.
INENGINEANDTRANSMIS-
ssmoothlyatapproximately1,000revolu-
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myUse
ethegearshiftlever isinneutral,then en-
heengineuntilit isthoroughlywarmedup.
n thetransmissionandcirculatethelubri-
onlubricanthasbeenwarmedsufficientlyto
ears,drivethevehiclein firstgearfora short
bricantin thefinaldrive.Whengearchanges
oceedtooperatethevehiclein theusual
SION.
ytofordstreams,orunexpectedflooding
oahigherlevel,and openallfloordrain
of thetankandcleanoutall mudandsedi-
eathoroughinspectionofwiring,ignition,and
ne,clutch,orelectricalapparatushave
notifyhigherauthority.
ENEMYUSE
ewhensubjecttocaptureor abandon-
ill beundertakenbytheusingarmonly
e militarycommanderconcerned,such
ollowareforinformationonly.Certain
onoutlinedrequireTNTand incendiary
enormalitemsof issue.Theissueofthese
onsunderwhichdestructionwillbeeffected
eachcase,accordingtothetacticalsituation.
to, thevehiclemustbesobadlydam-
toredtoausableconditionin thecombatzone
alization.Adequatedestructionrequiresthat
perationofthevehiclebedestroyedordam-
lyimportant,thesameessentialpartsmust
ehiclessothattheenemycannotconstruct
nitfromseveralpartiallydamagedones.
ONS.
nstructionsapplytothe155-mm
d8-inchHowitzerMotorCarriageT89.
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Gunor8-inchHowitzer.
endiarygrenadesontheirsides,one on
mber.NOTE:Usesixtoeightgrenadesin
nand10to 12grenadesindestroyingthe
breech.Equipanotherincendiarygrenade
fuze,ignite,andtossit inthemuzzle.Quickly
ximumelevation.Elapsedtime:3to5minutes.
enadeswillfuzewiththeinteriorof the
possibletoopenthebreech.
Twomethodsofdestroyingtheve-
ir orderofeffectiveness.
PLOSIVES.
rtablefireextinguishers.Dischargefixed
Puncturethefueltanks.Placea3-poundTNT
rticalfueltank,betweenengineandbulk-
Tchargeagainstleftside oftransmissionas
erttetrylnonelectriccapswithat least5
charge.Ignitethefuzesandtakecover.
terialsare available,additionalde-
ishedbyplacinga2-poundTNTchargeat
ackassembly.Detonatethesechargesinthe
s.
beforehandandcarriedin thevehicle,
paratedfromthe chargesuntilused.
NFIRE.
eportablefireextinguishers.Discharge
ncturethefueltanks.Openalltankdoors
lable.Fireonthevehicle,usingadjacent
illery,orantitankrocketsor grenades.Aim
andarmamentinthe ordernamed.Ifagood
maybe considereddestroyed.
ngvehicleby thebestmeansavailable.
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NCEINSTRUCTIONS
rmationfortheguidanceofthe per-
ationsresponsibleforthe maintenance(first
sequipment.Itcontainsinformationforthe
uledlubricationandpreventivemaintenance
ptionandmaintenanceofthemajorsystems
nsin relationtoothercomponentsofthe
ALTOOLSANDEQUIPMENT
inthissectionis forinformationonly.
sisforrequisition.
ndechelon,special,setA,Tank,medium,M4,75-mm
un(dry)M4A1,76-mmgun(wet);
howitzer,M7;Carrier,cargo,M30;Car-
,M12;Vehicle,tankrecovery,M31;
ndechelon,special,setB,Tank,medium,M4,75-mm
un(dry);M4A1,76-mmgun(wet);
howitzer,M7;Carrier,cargo,M30;Car-
;M12,Vehicle,tankrecovery,M31;
od-
tl
ension,3/g-in.
00SN-F-2B
rcovered,two
1gage,with
8B-257839AB
1265-35TEC-50-29B
1-D-2984MTM-M3-386B
eplacing,power
41-P-555-600
220MTM-M3-165B
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thickness0.006
1/16in... .41-G-412-77
speeder,brace
h17in. ...41-H-1507-95
T-sliding,Vs-in.
41-H-1509-53
269-200
eadcenter,
olestopower
er% in.,
th
-600
ertrainas-
n.,length
-F-2997-220)41-P-647
dleand
42-200
1-P-2219-50
crewtype41-P-2941-800
ranceadjusting.41-S-1725
-3829-50
19
point,complete..41-T-3092-77
attaching,
550
vebodycheck
36-620
eend,double
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olsandEquipment
ool-
ts
nsion,8in.
0SN-L-63
g,22-in41-B-312-200MTM-M3-16L
g,IVs-in.
498-50MTM-M3-16C
1-H-1779-50MTM-M3-16E
nch1-in.sq
-16M
.sqdrive,
M-M3-16J
.sqdrive,
0MTM-M3-16N
.sqdrive,
M-M3-16F
.sqdrive,
TM-M3-16H
.sqdrive,
TM-M3-16K
able),%-in.sq
ze7/16-in.,
99-90IMC-101823B
able),%-in.sq
zeVa-in.,
99-120IMC-101217B
,singleend,octa-
ngl3/s-in.,
MTM-M3-558B
ndechelon,special,setB,supplemental(forvehicles
pringsuspension).'
eplacingsuspen-
kabsorber
emoving41-A-30-650B
s41-B-1411-200B
talsuspension41-L-1616B
innerbogieand
ndouter
384-965B
trackrollers
85-350B
link,pipeca-
ngthI'/g-in.41-W-1781-100TEC-50-54B
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partmentLubricationOrder9-747
irstandsecondechelonlubricationmain-
bricationbelow0F,refertoparagraph20.
edbyordnancemaintenancepersonnelis
uedwith eachitemofmaterieland
times.Intheeventthematerielis received
rmshall immediatelyrequisitionareplace-
tantGeneralDepot.Seelists inFM21-6.
cationOrderarebindingon allechelons
shallbeno deviations.
edontheLubricationOrderarefor
nsduringactiveserviceabove0F.These
nderextremeconditionssuchasexcessively
prolongedperiodsofhigh-speedoperation,
dordust,immersionin water,orexposure
chmayquicklydestroythe protective
alendarintervalsmaybeextendedwhen
edinthe"Key"in accordancewiththree
ve+32F,+32Fto0F,andbelow0F.
ubricantsis determinedbymaintaininga
ofthematerielduringthe approachtochange-
uringinitialaction.Sluggishstartingisan
ckening,andthesignaltochangetogrades
ertemperaturerange.Ordinarilyitwill be
esoflubricantsonlywhenairtemperatures
thigheror lowerrange.
ONINSTRUCTIONS.
Eachpieceofmaterielissupplied
tadequatetomaintainthemateriel.This
bothbeforeandafteruse. Lubricationguns
andinsucha mannerastoinsurea proper
t.
easecups,oilers,andoilholesarereadily
eLubricationOrder.Wipethesedevicesand
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leanbeforelubricantisapplied.
provided,applynewlubricantuntil
om thevent.Exceptionsarespecifiedin
rder.
solventordieselfueloilwill beusedto
ofgasolineforthispurposeis prohibited.
ethoroughlydriedbeforeapplyinglubricant
orenote).
ividualUnitsandParts (figs.7and
EATHERS.
eservoirtobeadlevel.Every500miles,
Replaceandrefill.
andreoil theelementsofthecrankcase
sion,differential,andfinaldrivebreatherat
LubricationOrder.Drainexcessoilthor-
BBEARINGS.Whentheengine
ackbearings.
ARING.Whentheengineisremoved,
,andlubricate.Replaceplugafterlubricating.
beforeoperation,checkthelevelwith
d,ifnecessary,addlubricantto thefull
ssionfillertomarkon bayonetgagewith
pipe.Every3,000miles,drain andrefill.
whengearlubricantis warm.Thetrans-
naldrivesarecombinedinoneunit. Drain
erentialandfinaldrivedrainplugholes. To
ssionlubricationsystem,alsoremoveoilcooler
cklevelbeforeoperation.Every500
nonly afteroperationwhenoilishot. Refill
e locatedunderfillcap.
achuse,cleanandoil.Weekly,ifcable
tercoils.Monthly,unwindentire cable,clean
ANDPLUNGER.Tolubricate,place
,unscrewcoverfromfrontofequilibrator,and
case.Wipeall surfacesandapplyathin
osedpartsincludingoutersurfaceofboth
ECHANISM.Immediatelyafter
vedaysthereafter,disassemblethegascheck
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ndleandclean allpartsofthe breechand
thegascheckpad,withbore-spongingsolu-
r,drythoroughly,andapplya filmofoil.
beingfired,cleanwithdry-cleaningsolvent,
assembled,thegascheckpadwill bewiped
ningsolventorbore-spongingsolution).
(SAE30)orSAE10 foralltemperatures
nanddry.
g,whilethetubeis stillhot,swabwith
onsistingofVipoundofsoda-ashto each
ethoroughlywithcleanwater,wipethor-
m ofoil.Thegunwill notbeallowedtore-
eaning.Repeatthisprocedureon3 con-
runtilthereis nolongerevidenceofsweating.
otbeingfired,wipethebore cleanand
days,swabwithdry-cleaningsolvent,wipe
atedoorhingesand latches,control
pinsandclevises,clutchandaccelerator
earings,seatslidesand supports,cable
dearmlinkage,andpintle.
wheelhandlesandotherrubbingparts.
OLUBRICATION.Donotlubricate
nkageandslides,finaldrivesprocketbear-
w-outyokebearings.
DPERIODICALLYBYORD-
sembledforrepairoroverhaul,clean
ballandroller bearinggrease.
sembledforrepairoroverhaul,clean
ballandroller bearinggrease.
ings.Every6months,disassemble,
peciallubricatinggrease.
gs.Every6months,disassemble,clean,
ubricatinggrease.
y6months,disessemble,washallparts,
pistonrodthreads,andcylinderheadthreads
ease.
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Services
very6months,removegearhousing
ewithgeneralpurposegrease.
wheelShaftBearing.Whendisas-
overhaul,cleanandrepackwithspecial
ShaftLowerBearing.Whentravers-
bledforinspectionandoverhaul,cleanandre-
iallubricatinggrease.
Whendisassembledforinspectionor
rythoroughly,andrepackrollerbearings
ftand ballbearingsofthebrakedrum gear
nggrease.Applythinfilmof No.0general
teethandthebrakeshoeguidebushings,
excesslubricantthatmightreachthebrake
ase groovesinclutchmechanismwith
performanceofmaterieltotheOrd-
formaintenanceinaccordancewithTM
maybe maintainedintheDutyRoster
.
CESERVICES
N.
val.Preventivemaintenanceserv-
0-15are afunctionofusingorganization
,andtheirperformanceistheresponsibility
horganizations.Theseservicesconsistgen-
halt,after-operation,andweeklyservices
dthescheduledservicestobe performedat
ganizationalmaintenancepersonnel.
generalinspectionofeachitem
ngmemberor connection,andisgenerally
item isingoodcondition,correctlyassem-
lyworn.
dcondition"isusuallyan externalvisual
hethertheunitisdamagedbeyondsafeor
m"goodcondition"isexplainedfurtherby
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wisted,not chafedorburned,notbroken
yed,notdentedor collapsed,nottornorcut,
toseethatit is"correctlyassembled"is
nspectiontoseewhetherit isinits normal
vehicle.
todetermineifitis "secure"isusually
ation;awrench,hand-feel,orapry-bar
aninspectionmustincludeanybrackets,
ckingwires,orcotterpinsusedin assembly.
beunderstoodtomeanwornbeyond
oint likelytoresultin failureiftheunitis
xtscheduledinspection.
(FIRSTECHELON)
hanicalefficiencyitisnecessarythat
allyinspectedatintervalseachdayitis op-
ectsmaybediscoveredandcorrectedbefore
geor failure.Certainscheduledmaintenance
atthesedesignatedintervals.Anydefects
gcharacteristicsbeyondthescopeoffirst
ereportedatthe earliestopportunitytothe
thority.Theservicessetforthin paragraphs
seperformedbythecrewbeforeoperation,
ndafteroperationand weekly.
Driverpreventivemaintenance
ackof "Driver'sTripTicketandPreventive
ord"W.D.,FormNo.48,tocovervehiclesof
speculiarto thisvehiclebutnotlistedon
veredinmanualproceduresundertheitems
d.Certainitemslistedon theformthatdo
areeliminatedfromtheproceduresaswritten
anizationmustthoroughlyschooleachcrew
anceproceduressetforthinthis manual,
ecificallyonW.D.,FormNo.48or not.The
No.48 thatapplytothisvehicleare ex-
providespecificproceduresforaccomplish-
dservices.Theservicesarearrangedto
onservethetimeofthecrewandare not
mericalorderasshownon W.D.,FormNo.
wever,areidenticalwiththoseshownon
ERVICE.
nscheduleisdesignedprimarilyasa
lehas notbeendamaged,tamperedwith,or
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Services
r-operationService"wasperformed.Various
averenderedthevehicleunsafeforoperation
wto determinewhetherthevehicleisin
missionto whichitisassigned.Thisopera-
mitted,eveninextremetacticalsituations.
erationServiceconsistsofinspecting
ngtotheproceduredescribed,andcorrecting
es.Uponcompletionoftheservice,results
othe designatedindividualinauthority.
DDAMAGE.Examineentire
ntandarmament,foranydamagethatmay
debris,shellfire,sabotageorcollisionsince
ineandfightingcompartmentsforabove
tedwiringorcontrollinkage,loosedrive
HERS.Examinevisiblefixedex-
sin enginecompartmentforsecurity,dam-
heckportableandfixedextinguishercylin-
curityandfullcharge.
Checksupplyoffuel andoillevel
ve;add asnecessary.Checkoillevelin
correctlevelif necessary.Anyappreciable
-operationServiceshouldbeinvestigated
ANDDRIVES.Inspectcarburetor,
andblowerunitforloosenessor damage.Be
arein goodconditionandadjustedtohave
lection.
RAL.Checkundervehicleandin
nyindicationsoffueloroil leaks.Inspect
ngs,oilfilter,visibleportionsofoilcoolersand
tionsofleaks.Traceallleaksto theirsource
.
neis beingstarted,observeif
orilyandinspectforlooselinesorbrackets
UP.Testforhydrostaticlockby
nimumtest50revolutionswithhandcrank).
tchandfuel valvesandstartengine.Note
sm,particularlywhetherstarterhasadequate
esanddisengagesproperlywithoutunusual
indicatedimmediately,stopengineandcor-
and throttlesoenginewillidle at800revolu-
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rm-up,seethatthrottle operatesfreelyand
gBefore-operationServices.
neoil pressuremustbeindicated
40to70poundsat 1,800to2,400revolutions
mediatelywhen"lowoil"redlight comeson.
ermayshowhighchargeuntilgen-
erythe currentusedinstartingthe engine;
ghtchargeor zerowithlightsandacces-
utionCounter.Tachometershould
sperminuteandrevolutioncountershould
olutions.
eGage.Operatingtemperatureas
exceed190F andshouldshow100to120F
registeramountof fuelintanks.Use
eamountoffuelin eachtank.Normally,
perationandgageshouldregisterfull.
NDSHIELDWIPERS.Iftactical
nforproper operationandtone.Whenused,
rmstosee thattheyarein goodcondition
otorsandobserveif thebladesoperate
dcontactsurfacesevenly.
nallvisiondeviceglass andinspect
nalllights andexamineforloose-
alsituationpermits,operateallswitchesand
atisfactorily.
DFLANGENUTS.Seethatalldrive
ewheelandsupportrollerassemblyand
andsecure.
DTIRES.Whileinspectingtracks
nections,removeallstonesandforeignob-
sandtracksandwheelsandrollers.See that
wheeltiresare ingoodconditionandcheck
equippedwithhorizontalvolutesprings,
ntrackbetweenidlerwheelsandrearsus-
nthesprocketandforwardsuspensionwheels.
DSUSPENSIONS.Examineto
all bogiesuspensionunitsareingood con-
cleswithhorizontalsuspension,seethat
eandnotleaking.
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Services
BRAKELINKAGE.Inspectlinkage
connectionsandmountingsandfreeopera-
whethertheymeetresistanceevenly,
ition.Leversreleasedarecorrectlyposi-
distancefromfaceofbrakedrumhousing
is7to 71/2inches.
specttoseethat fendersareingood
ounted.
NNECTIONS.Seethattowloops
ecurelyshackled.Inspectpintlehookfor
ountingandproperoperation.
,WINCHANDTARPAULIN.In-
kenwelds,looseattachmentsandproper
escapehatches.Examinewinchcables,
at theyareingoodconditionandsecurely
ecurelylockedifin raisedposition.Ifin
sare properlymountedandtarpaulinse-
e,tarpaulinmustbesecurelystowed.
NATORS.Examinedecontami-
llchargeandsecuremountings.
EQUIPMENT.Checktoolsand
temsarepresent,ingoodcondition,and
ed.
RATION.Engineshouldidle
nsperminute.Accelerateengineseveraltimes
temperature,(8)(d) above,andnoteany
ctoryoperatingcharacteristics,orexcessive
RMIT,FORMNO.26.Driver
ermitonhis person.Accident-ReportForm
bricationOrderandWJD.,A.G.O.FormNo.
bleandsafelystowed.
ERVICE.
hicleisinmotion,listenfor any
ocks,squeals,orhumsthatmay indicate
omanypartofthe vehicle.Bealertforodors
mponentsorunits(such asgenerator,brakes,
emor exhaustsystem,orothertrouble.
arsshifted,orthe vehicleturned,consider
satisfactoryorunusualperformance.Watch
yforunusualbehaviorindicatingpossible
htheyapply.
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erationServicesconsistofobserving
ngtotheproceduresfollowingeachitem,
cationsofserioustrouble.Noteminorde-
orreportedatearliestopportunity,usually
AKES.Withvehicleinmotion,
dently.Observeifthereisnormalresponse
evertravel.Disengageclutch,applyboth
esstopvehicleeffectively,meetingresistance
ition.
KE.Stopvehicleonar easonable
rakelocktosee ifbrakesholdsatisfactorily
relyinthe appliedposition.
chreleasemechanismshouldop-
sivenoise.Clutchshouldnotgrab,chatteror
andshouldnotslipunder loadwhenfully
shouldbemaintainedatapproximately
N.Transmissionshouldshiftinto
outunusualnoise andshouldnotslipout of
eonthealert foranyunusualnoiseduring
ONTROLS.Drivershouldbeon
engineperformancesuchaslackof power
g,backfiring,unusualnoiseor indicationof
smoke.Observewhetherornotengineac-
dcontrolsoperatewithoutexcessiveloose-
oiseduringoperationofvehicleisreported,
adiooperatorinlocatingthe interference.
TS.Observethereadingsofallperti-
tlyduringoperation,toseewhethertheyare
ofunitstowhichtheyapply,and that
hiclespeedandrecordsaccumulatingmileage.
R.Listenforanyunusual noise
s,bogiewheelsandfinaldrivesthatmight
ge,excessivewearorinadequatelubrication.
vicesmayberegardedasminimum
andshouldbeperformedunderall tactical
oreextensivemaintenanceservicesmustbe
her.
vicesconsistofinvestigatinganyde-
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Services
eration,inspectingitemslistedbelowac-
followingtheitems,andcorrectingany
enciesnotcorrectedshouldbereported
dindividualinauthority.
SUPPLY.Makesurethat there
operatevehicletonextscheduledstop;re-
calsituationpermits.
ES(HUBS,TRANSMISSION,
SOEQUIPPED,SHOCKABSORB-
lyoneachtrackwheelandtracksupport
theyareabnormallyhot.Ifwheelhubsare
and,bearingsmaybeinadequatelylubri-
perlyadjusted.Checkthetransmissionand
gorexcessiveoilleaks.Onvehiclesequipped
ension,shockabsorbersshouldfeelwarm.
ot becomewarmwhenthevehicleisbeing
that thefluidislow ortheshockabsorberis
neventsoftransmissionandfinal
epresentandnotdamagedorclogged.
SUSPENSIONS.Inspectthese
age.Removestonesandotherforeignobjects
ystemorbetweentracks.
AKELINKAGE.Inspectlinkage
ndinvestigateanyirregularitiesnotedduring
LANGENUTS.Seethatall
heelandsupportroller assemblyand
andsecure.
minetracks,bogiewheels,tiresand
secureandnotdamaged.Makesurethat
y.Cleanoutstonesandtrashfrom track
ERAL.Inspectgenerallyforindi-
ks.Seewhetherthereareanyindicationsof
oil cooler,filterorlines.Traceanyleaksto
reportthem.
SANDBELTS.Examineengineac-
chmentstobesuretheyaresecure,properly
rivebeltsare ingoodconditionandtension
haveViinchdeflectionundernormalfinger
sedbyoperationof theenginewasobserved,
sandcouplingringsand nuts;engine,regu-
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ndingstrapsandregulator filtersfordam-
sandmountings.
RS.Whenoperatingunderex-
nditions,inspectaircleanersandbreather
attheyarein conditiontodelivercleanair
ed.
spectfendersforgoodconditionand
NNECTIONS.Inspectpintlehook
mountingandproperoperation.
,WINCHANDTARPAULIN.
mageorlooseattachments.Ifin use,besure
d,orif notinuse,securelystowed.
nallvisiondevicesand lightlenses;
mageandsecurity.
DWEEKLYSERVICE.
onservicingisparticularlyimportant
ewinspectsthe vehicletodetectanyde-
eveloped,andtocorrectthosetheyareper-
uldpromptlyreportresultsof theinspection
alinauthority.If thisscheduleisperformed
ouldbereadytoroll againonamoment's
tionService,withfewexceptions,isthen
nwhetherthevehicleisin thesamecondi-
oncompletionoftheAfter-operationService.
ceshouldneverbeentirelyomitted,evenin
s,butmaybereducedtothebare fundamental
-haltService,ifnecessary.
ormingtheAfter-operationService
andconsideranyirregularitiesnoticedinthe
operation,andAt-haltServices.TheAfter-
sofinspectingandservicingthefollowing
fter-operationServicethataremarkedby
ditionalWeeklyServices,theproceduresfor
paragraph(b)ofeachapplicableitem.
ATION.Accelerateanddecelerate
ndencytomiss orbackfireoranyunusual
htindicatewornparts, loosemountings,
ultyignition.Investigateanydeficiencies
dcorrectorreportsame.
S.Checkallpertinentinstruments
ingproperlyandcontinuetoregisteror in-
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Services
ceofunitstowhichtheyapply.Inspectthem
Stopengine.
SUPPLY.Refillbothfuel tanks.
pplytank andfilltocorrectlevel.CAU-
ltankstooverflowing;allowroomfor ex-
or oilusedfromsparesupplycansi sre-
NDSHIELDWIPERS.Iftactical
nforproper operationandtone.Ifinuse, see
erateproperlyandinspectbladesandarms
urity.
allvision devicesandinspectfor
all lightlensesandexaminefor
ofmounting.Turnonswitchesto seethatall
ISHERS.Inspectvisiblelines
rs,fixedand portable,toseethattheyare
ndnotleaking.If extinguishershavebeen
ortforexchangeorrefill.
ATORS.Inspectdecontaminators
fmounting.
ksor damageandsecurityofmounting
sandcarrierandinspectfor looseor
minalsarecorroded,remove,cleanandapply
cleanwatertobringlevelto Vainchabove
ngtemperatures,donotaddwateruntil
eoperated.
ORIES.
temsinenginecompartmentand
eyareingoodcondition,cleanandsecure.
ttension;theyshouldhaveVa-inchfinger
essibleunitsmountedonengineac-
s,damageandoilleaksatmountingpads.
shfrominandaroundoil coolercoreair
RING.Examineconduitsfor
htenalllooseconnectionsandcleanallacces-
dionoisesuppressionbondclips,straps,filters,
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orsaresecurelyconnectedormounted(pars.
conduitcouplingring nuts.
RSANDBREATHERCAP.In-
erandbreathercapareingoodcondition,se-
ected.Examineforexcessivedirtandproper
cessary,accordingtoparagraphs26and 27
.Inspecttoseethat mainfuel
king.(Thefilterlocationissuchthat com-
eonlyafterenginehas beenremoved.)
TROLS.Inspectaccelerator,hand
ontrolsforexcessivewearanddisconnected
DTIRES.Examinetracksfordam-
eorwornconnections.Removeallstonesor
eenblocksandtracksandwheelsandrollers.
pensionwheeltiresto seethattheyarenot
heels.Inspecttracksforlooselockpinsand
,thereshouldbenotrackbulgebetweenthe
ensionwheelsandbetweenthe sprockets
heels.CAUTION:Donotadjusttrackson
rizontalvolutespringstootight.
DSUSPENSION.Inspectvolute
eingoodconditionandproperlyassembled.
are secureandthatsupportandsuspension
excessivelyworn.Examineshockabsorbers
bushingsorleaks.
RAKELINKAGE.Inspectlevers,
rgoodcondition,security,adequatelubrica-
vestigateanyunsatisfactoryperformance
Steeringleversshouldhave1to 4Viinches
stanceslightlybeforethe verticalposition.
flevers.Leversarecorrectlypositionedwhen
aceofbrakedrumhousingcoverstofront
nches.
SHAFT(WEEKLYONLY).Ex-
ointsto seethattheyarein goodcondition,
ot leaking.
ndfinaldriveventsto seethattheyare
ndnotclogged.
s,cleanthoroughlyandinstallse-
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Services
ERAL.Inspectallfuelandoil
coolers,transmissionandfinaldrive forindi-
eaksfoundtotheir sourceandcorrector
spectfenderstobesure theyare
damaged.
ONNECTIONS.Besuretowingloops
ecurelyshackled.Examinepintlehookfor
operation.
P,WINCHANDTARPAULIN.Ex-
sor looseattachments.Testactionofspade
itoperatesproperly.Inspectwinchcable
ands.When rampisinloweredposition,be
oundsecurely.Whenrampisin raisedpo-
curely.Examinetarpaulinandbowstosee
ditionandstowthemproperly.
minearmor,andgunmountshields
atwouldrendervehicleunsafefor combat
CES.Inspecttheperiscopeprisms
eyare ingoodcondition,cleanandsecurein
sshouldbecleanedonlywithasoftcloth
TING,ELEVATINGANDTRAV-
ethatgun issecureonitsmount,clean,
onforimmediateuse.Testgunelevating
orproperoperation.Besurethattraversing
ditionandoperatessatisfactorily.Corrector
orityanydeficienciesnoticedduringoperation.
ngsandassemblynuts orscrews
atedthenecessity.
ketandidlerflangenuts,trackcon-
saljointflange,gunmounts,toolandequip-
tionracksandclipsoranyotheritemwhere
ndicatedthenecessityonaweeklyormileage
ION.
tchhinges andlockingdevices,com-
atches,towshacklesandanyotherpoint
nhasindicatedthatitis necessary.
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s
ointsofthevehicleindicatedon the
ssaryonaweeklybasis.
INEANDVEHICLE.
casingsandrefusefrom interiorof
drippingsfromdrivingcompartment,and
moveexcessdirt,stonesandgreasefrom
ethatenginecompartmentgrillesareclear
ofvehicleandremovealldirt and
cal,wipeascleanas possibleandwatchfor
seglare.Openenginecompartmentand
compressedairisavailable,blowalldirt
andoil coolercoreairpassages.
DEQUIPMENT.
dequipmentstowagelists,sectionIII,
esentandseethat theyareinserviceablecon-
ormounted.
dequipment;mountorstowsecurely
vehicle.
NTENANCE
ncyofpreventivemaintenanceserv-
ideredaminimumrequirementfornormal
erunusualoperatingconditionssuchas
everedust,sandyorextremelywetterrain,it
rmcertainmaintenanceservicesmore
on.Thecrewshouldaccompany
mechanicswhileperiodicsecondechelon
servicesareperformed.Ordinarilythevehicle
cheduledpreventivemaintenanceservicein
on;thatis,itshould bedry,andnotcaked
hanextentthatinspectionandservicingwill
owever,thevehicleshouldnotbewashedor
ecausecertaintypesofdefects,suchascracks,
parts orassemblies,aremoreevidentifthe
ordusty.
ormation.Ifinstructionsotherthan
eralproceduresinsubparagraphd,or the
paragrapht,whichfollow,arerequiredfor
reventivemaintenanceserviceorforcorrec-
aybesecuredfromother sectionsofthis
atedindividualinauthority.
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Services
esegeneralproceduresarebasicin-
ollowedwhenperformingtheserviceson the
cprocedures.NOTE:Thesecondechelon
ghlytrainedintheseproceduresso thatthey
ally.
edsubassembliesareinstalledto correct
etakentoseethatthey areclean,correctly
ricatedandadjusted.
ricantretainerseals,a coatingofthe
overthesealingsurfaceof thelipofthe
aleatherseal,itshould besoakedinSAE10
utes.Theoilshouldbewarm,if practicable.
be workedcarefullybyhandbeforeinstall-
notbescratchedormarred.
ertoparagraph28 b.
areindicatedbyrepeatingtheitem
hichshowtheintervalat whichtheservices
owthat thepartsorassembliesareto receive
es.Forexample,anitemnumberinoneor
GHTENprocedure,meansthattheactual
stbe performed.Thespecialservices
ssaryadjustmentsinaccordancewith
smanual,specialbulletins,or othercurrent
hevehiclewithdry-cleaningsolventto
dirt,andotherforeignmaterial.Afterthe
emin cleansolventanddrythemthoroughly.
s cleanuntilreassembledandbecertainto
ayfromrubberorothermaterialwhichit
tectivegreasecoatingfromnewpartssince
agoodlubricant.
Thisappliesbothto lubrication
earon thevehicleLubricationOrderandto
heOrder,butwhichshouldbeperformedin
enanceoperationsifpartshavetobedisas-
ervice.
nsistsofperformingspecialoperations,
rywater,drainingandrefillingunits withoil,
heoilfilter, aircleaner,orcartridges.
ngoperationsshouldbeperformedwith
forceonthewrenchhandle)totightenthe
chanicalpractice.Useatorque-indicating
Donotovertighten,asthismaystripthreads
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ningwillalwaysbeunderstoodtoinclude
ockwashers,locknuts,lockwire,orcotter
etightening.
enconditionsmakeitdifficulttoper-
enanceproceduresatonetime,theycan
ections,planningtocompletealloperations
Allavailabletime athaltsandin bivouac
ecessary,toassurethatmaintenanceopera-
ntimeislimitedby thetacticalsituation,
sinthecolumnsshouldbe givenfirstcon-
rsofthe preventivemaintenancepro-
nticalwiththoseoutlinedon WJD.,A.G.O.
"PreventiveMaintenanceServiceWork
nk-likeWheeledVehicles."Certainitems
notapplytothisvehicleare notincluded
manual.Ingeneral,thenumericalsequenceof
followedinthemanualprocedures,butin
viationforconservationofthemechanic's
eproceduresforperformingeachitem
hlymaintenanceprocedures,aredescribed
hpageofthe charthastwocolumnsatits
themonthlyandthe semimonthlymain-
ryoftenitwillbefoundthata particularpro-
oth scheduledmaintenances.Inorderto de-
tofollow,lookdownthecolumncorrespond-
e,andwhereveranitem numberappears,
icatedoppositethenumber.NOTE:Those
nasterisk(* )requireadditionalservicesat
on.
tuationdoesnotpermita
eitemswhichrequire little
evehicle.Whenaroad testispos-
blyfor3miles,butnot over5
VICE.PerformtheBe-
outlinedinparagraph29.
ES.Checktheseitemsas
oilpressuremust beindicated
40 to70poundsat1,800 to
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Services
ute.Continuetoobserveoil
tvariousspeedranges.Stop
"LOWOIL"redlightcomeson.
age.Gagereadingshouldin-
ginewarm-upandshouldnot
ouldnotbemovedbeforeoil
0F.
rgedbattery,ammeterread-
efor onlyashorttimeafter
tlyabovezerowithall lights
sturnedoff.Ifbatterycharge
tehigherchargefora longer
eter.Inspectspeedometerfor
ng,excessivefluctuationof
ethatodometerregisters
s.
onCounter.Inspecttachometer
texcessivehandfluctuationor
volutioncounterregisters
s.
orswitchtoboth"R"and"L"
etherfuelgageindicatesapproxi-
htank.
LDWIPERANDSIREN.
pectassemblyandwipersto
conditionandsecure,andthat
htheirfullstrokeand contact
foroperationandtone,and
andsecuremounting.
PARKING,LEVERS,
EERINGACTION).
backonsteeringbrakelevers.
sted,leversshouldmeetheavy
averticalposition.Accelerate
ed,releaseacceleratoranddis-
steeringbrakes,andobserve
cleproperly.Applysteering
eethattheysteervehicle
akelockwithvehiclestopped
ouldholdvehicleeffectively,
dposition.Observereleased
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Leversarecorrectlypositioned
romfaceofbrakedrumhous-
everis7to 7Viinches.
RAG,NOISE,GRAB,
pedalforcorrectfree
nches(par.986).Clutch
dengagewithoutunusualnoise,
hforslippageunderload, when
TION,VIBRATION
eachspeedrangeoftrans-
rcontrolleveroperatesproperly
unusualvibrationsor noise
ightindicatedamage,excessive
mproperlubrication.
ATION,POWER,NOISE,
PTION).
ped,observeifengineruns
peedof500 revolutionsper
est,observewhetherthereis
stallwhenacceleratorisre-
osed.
tionandNoise.Testengine
dpullingpowerineach
inhigh range,accelerateengine
penthrottleto topspeedand
oise,ping,or vibrationthat
aged,excessivelyworn,orinade-
partsoraccessories.Governed
proximately2400revolutions
st,lookfor excessivesmoke
mpartment.
pletionofroadtest,acheck
nginehasbeenconsumingan
LERSHAFTSAND
SPROCKETS,IDLERS,
ROLLERSAND
, listenforanyunusualnoise
oneditemsindicatingdamaged,
inadequatelubrication.
MISSION,DIFFEREN-
ND,WHENSO
BERS).Placehandcau-
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Servicei
elandtracksupportroller hub
normallyhot.If wheelhubs
hehand,bearingsmaybeinade-
gedorimproperlyadjusted.
dfinaldrivesforoverheatingor
absorbersshouldfeelwarm.If
tbecomewarmwhenthevehicle
ndicationthatthefluidis low
t functioning.
AVERSINGMECHA-
hitsfull rangeandcheck
,orerraticaction.Testgun
theyoperateand allmecha-
UEL).Lookinengine
ehicleforindicationsofoilor
bleoillines andconnections
ENGINE,MOUNT-
UTCHANDEXHAUST).
celeratingengine,listenfor
accessories.Noticewhether
nthatmayindicatelooseengine
ayindicatelooseor inade-
partsorreleasebearings.
tracksforsatisfactoryten-
ckbulge betweenidlewheels
heelsandthe sprocketandthe
s.CAUTION:Donotadjust
izontalvolutespringstoo
NS
fuelpumptestgageto
withengine runningatidling
rthepressureiswithinthe
ately3Vipounds(par.73).
GUARDS,PAINTAND
LSANDPINTLEAND
ordamagetosidearmor,
hellfireor collision;checkfor
torbright spotsinpaintthat
eethatallvehiclemarkingsare
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hacklesandpintletoseethat
and securelymounted.Test
ndtone.
EHATCH,INSPEC-
LUGS).Inspecthull
atescapehatchlatchoperates
ylubricatedandseethat all
a fewdropsofoilto escape
Donotfullyopenescape
LDRIVES.Inspecthous-
goodconditionandnot leak-
Seethatallassemblyand
.NOTE://changeoflubri-
lwithspecifiedoilatthis time.
alassemblyandmounting
CONNECTORS,AND
oseethattheseitemsare in
assembled,andsecure.Pay
econnectors;bottomed
Tightenwedgenuts.
ksare disconnectedand
ets,supportrollers,andidlers,or
tenanceservice,therelated
byanasterisk(*)on thePre-
viceWorkSheet,W.D.,A.G.O.
spectedasdescribedbelowin
edures.Ontheregularsemi-
enanceservicesthetracks
essrepairsare needed.CAU-
eremovedforrepairorre-
ltracksuntiltheservicesfol-
items22and25 havebeen
UIDEPLATES,AD-
TSANDSPRINGS).
hat theyareingoodcondition,
ure,andthatgreaseisnotleak-
elbearingseals.Besureadjust-
nutaresecure.Tightenall
oltsandnutssecurely.
bove,at eachthirdmonthly
heneverthetracksareremoved
dlerhub bearingsforlooseness
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Services
wheelsandlistenforany
dicateadamaged,excessively
catedbearing.
NKS,GUDGEONS,COL-
TESPRINGSAND
ARINGPLATES).Inspect
eingoodcondition,correctly
dthatgudgeons,collars,guides
excessivelyworn.Note
vetakenapermanentset(9
ts).Thoseconditionswillbe
eplacement(par.123).
blyandmountingnutsor
ANDSKIDS).Inspect
eyareingoodcondition,correct-
ymounted.Payparticularatten-
hasnotseparatedfrom rim
tornorexcessivelyworn.In-
antleaksfrombearings.
xaminebearingsforlooseness
andlisten foranyunusualnoise.
untingboltssecurely.
H,ANDNUTS).Examine
are ingoodcondition,correctly
mounted.Inspectsprocketteeth
aftflangegaskets,oroil sealsfor
Ifsprocketteethareexcessively
eplacedorreversed.Tighten
oltssecurely.
bove,at eachthirdmonthly
etrackisdisconnectedandre-
checkthesprocketteethfor
atsprocketsaresecure.Check
forloosenessandend play.
e,reinstallthetracksandcon-
tracksforsatisfactoryten-
ckbulge betweentheidler
nwheelsandbetweenthe
suspensionwheels.CAUTION:
ht onvehiclesequippedwith
CH,DECK,PAINTAND
ORS,HATCHES,
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AMAST).Inspectthese
ngoodconditionandsecure.
andhatchhinges andlatches
xcessivelyworn,andareade-
atgrillesarenot obstructed.
es andlowerstherampand
mpextensionslidesfreelyand
operly.Examinewinchcables
ands,and cablesheavesand
ntandoperation.Examine
shedsurfacesthatmaycause
hiclemarkingsarelegible.
LTANK).Inspecttosee
odcondition,secureandnot
reinplaceand serviceable.
NREQUIRED).Remove
nanceservice,onlyifinspec-
3,and14,and acheckofrecords
eddefiniteneed.
gnetosaregroundedwhen
gineanddrythoroughly,tak-
ngsolventawayfromelectrical
dequipment.
RANCE,LUBRICA-
DPUSHRODHOUS-
31onlywhenengineis
.Adjustvalveclearanceto
ctvalvetappets,rockerarms
gstosee thattheyareingood
mbled,andsecureandthat oil
dshaftsproperly.Inspectrocker
ivewearandrockerarmrollers
erboxcoversto seethatthey
asketsare serviceable.See
condition.
parkplugs.Examineinsu-
andelectrodesforexcessive
ustand/orreplaceplugswith
0.019inch.Besuretoinstall
er-tightenplugs.
NGMOTOR.Inspect
eyareingoodconditionand
surewiringconnectionsare
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Services
drivebeltstoseethat theyare
erlyadjustedto haveV2inch
n.
torinspectioncoversand
seethattheyareingood condi-
ree inbrushholders,clean,
thatbrushconnectionsare
ot brokenorchafing.Clean
ratorandstarterbyblowing
ghtenstarterandgenerator
netosareingoodcondition
dnotewhetherthereisevidence
adgaskets.Removebreaker
seethatpointsare notpitted,
th matingsurfacesandare
eakerpointgapsto0.008to
kandsetignitiontiming
nparagraph64c(3).
NDUITS.Inspectall
s,particularlyradionoisesup-
agnetostosparkplugsand in-
hieldingisin goodcondition,
elyconnectedandsupported
otherparts.Wipeallexposed
h.NOTE:Do notdisturb
lyloose.
oostercoilandconduitsto
condition,cleanandsecurely
P,OILSCREENSAND
CRANKCASE,FUEL
DCONTROLLINK-
eseitems areingoodcon-
oil isnotleakingfromoil
ssorycaseorcrankcase.Inspect
ks.Removeoilpumpscreens,
ry-cleaningsolvent,dry,and
Order(par.26and27).
e enginesump.Tighten
dmountingboltsandscrewsse-
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Services
theseitemsare ingood
yassembled,andsecurely
inspectioncoversareallin
siblemountingandassembly
eethatcowlingandshrouds
not interferewithfan.
oseenginesthatare re-
clutch,cleanpartsthoroughly,
wearordamage.Ifanypart is
ditiontohigherechelon.
ectgeneratordrivebelts
dcondition.Seethatdrivebelts
and notbottominginthe
ratordrivebelttohave Va-inch
ger-pressure.
ULKHEADAND
ktoseethatengine
bulkhead,isin goodcondition
linkageinengine compart-
andsecurelyconnectedand
partmentthoroughly.
ER,LINESANDFIT-
thesei temsareingood
mbled,securelymountedand
andinspectsampleofoil on
dilution.Seethatfillercapand
onandseal properly.
PUMP).Inspectto see
sible)arein goodcondition,
urelymountedandnotleaking.
mpty,drainwaterandsedi-
yremovingdrainplugs and
all fueltankmountingsand
eriorfuelfiltertoseethat
ureandnotleaking.
ltanksand removefuel
d,withoutdisassembling,clean
ent.Dryandinspectfordam-
ble,reinstall;ifelementis not
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efilterassembly.Tightendrain
urely.
ctoilfiltertosee that
ureandnotleaking.Remove
gnut,operateengineandob-
ating.
oilfiltercoverandelementand,
eanthemindry-cleaningsol-
eitemsfor damage.Ifelement
entirefilterassembly.
ER.Inspectcoreand
heyarein goodcondition,se-
noutinsectsandtrash fromin
es.
oseethattheseitemsare
yassembledandmountedand
ingboltsandconnections
minetoseethatmount-
andsecure.
ingboltssecurely.When
nsupportringto crankcasebolts
mblybolts.
HOES,LINKAGE
thesepartsofclutch
yarein goodcondition,cor-
andnotexcessivelyworn.See
bricatedandthatreleaseshoes
ar.98).
sibleassemblyandmounting
henengineisremoved,per-
engineisreinstalled.
EM(TANKS,
ANDMOUNTINGS).
fbothfixedandportableex-
yare ingoodconditionandse-
ot cloggedorvalvescorroded.
OUNTINGS,LINES
ONTROLLINKAGE
wasremovedforrepair
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Services
atthistime(paragraph51).
elyandproperlyconnectall
ndlinkage.
D-DOWNS,CARRIER,
Removebatteriesand
ailable,anddrythoroughly.
hold-downclampsforgood
arrierwithsodasolution,and
tteryterminalsandscrape
tly.Checkgravityandvoltage
ceprovidedonbackof Form
estofbatteryto seethatall
ndition.Atruetest cannotbe
elow1.225.If cellsvarymore
ndition.
oVainch aboveplatesby
batterysecurely,connect
e.
FUELVALVESAND
ratorandconnectinglinkage
dition,opensthrottlefully,is
peratesfreely.Openfuelvalves
witchatthis time.
STRUMENTS.Observe
r.16).Startengineto see
onofstarter aresatisfactory.
starterdriveengagesand
unusualnoise,whetherithas
andwhetherenginestarts
eethatall instrumentsoperate
thatoilpressureandammeter
y.
UEL).Afterstarting
partmentforindicationsof
m.
ECTIONS,BOND
spectbothgenerator
reingoodconditionandsecurely
ndparticularlyifradionoise
dingstrapsareloose ordam-
atnormaloperatingtem-
crewtoidle engineatapproxi-
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rminute.Handthrottlemust
stmixturecontrolscrewuntil
.75).
(PAINT,SEATS,
ADS,STOWAGE,AM-
NDRACKS).Inspect
odconditionandsecurelyassem-
tfightingcompartmentis
factorycondition,andthat
seatoperateproperlyandare
yparticularattentiontosee
padsarepresentandproperly
xesandracksandthatclips
oldshellssecurely.
scopeprismsandwindows
dcondition,cleanandsecurein
ldersaresecurelymounted.
devicesoperatefreelyandare
hattheirtraversing,elevating
eeandnotexcessivelyworn.
sandtheirstowageboxestosee
dition,cleanandsecure.CAU-
anedonlywitha softcloth
AVEL,LINKAGE,AND
ttoseethattheseitemsare
yassembledandmounted,well
velyworn.Besurereturn
ullreleasedposition.Adjust
mately1%inches(par.98).
RS,LINKAGEAND
brakelevers,linkageand
eingoodcondition,securely
ndnotexcessivelyworn.Apply
observewhethertheyboth
ightlybeforereachingavertical
gleversarecorrectlyposi-
tancefromfaceofbrakedrum
eoflever is7to 7Vainches.
blyandmountingnutsand
HERS.Examineacces-
caseindriver'scompartment
dition,thatall mountingand
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Services
wsaresecure,andthat there
herstosee thattheyarein
dnotclogged.
vebreathersandcleanthor-
alassemblyandmounting
DSEALS).Inspect
isingoodcondition,thatout-
embledandmountedandthat
ve,cleanandreinstallvent.
.Inspecttoseethattrans-
ates