Tm 9-791 M8 ARMORED TRAILER

7/28/2019 Tm 9-791 M8 ARMORED TRAILER

1/59

edmatter TVieinformationcontainedinre-

eessentialcharacteristicsofrestricted materiel

n knowntobeinthe serviceoftheUnitedStates

edloyaltyanddiscretion whoarecooperatingin

notbecommunicatedtothepublic ortothe

dmilitarypublicrelationsagencies.(See also

28 September1942.)

Publ

icDomain,Google-digitized

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43

onofthe

eere&Company)

ructions

324

465-7

4-2011-13

nthe

s23-2515-16

Maintenance

nmainte-

tsandac-

033-35

dwheel

42-48

e66-6949-51

-53

884.September12,1942.MOOO'i(\)

PublicDomain,Google-digitized

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3/59

ructions

for theinformationoftheusingarms

ionoftheArmoredTrailerM8,this

linformationrequiredfortheidentification,

el.

y,andsuchrepairsasmaybehandledby

aybe undertakenonlyunderthesupervision

echanic.

atureoftherepair,modification,oradjust-

or facilitiesoftheunit,theresponsibleord-

formedsothattrainedpersonnelwith suit-

maybeprovided,or properinstructionsissued.

)isa two-wheeled,rubber-tiredvehicleto

f-tracks,or2V2-tontrucks.Itpermitscarrying

ammunitionwiththecolumn.Theboxis

frameworktowhichis alsoweldedtheaxle.

teelplates andhastwohingedcovers.Web

n thecovers,holdthecargoinplace.

chthistraileristowedis suppliedwith

therearofthe towingvehicle.Thepintlehitch

ease,operatedfromthe towingvehicle,for

hilethevehicleismovingforward.Combat

suallyhavepintlehitchesthatare suitable

talledpermanently.

dwithbrakeswhichare operatedbya

rontof thetrailerbox.Thesebrakesareto

esonly.


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M8 Leftfront

MSWithCoversOpenOverhead


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withtools2,640Ib

b

randpintlehitch. .... 2,858Ib

n.


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LS

ntrols4

NONCONTROLS(figs.3and4).

ingbrakeleverislocatedat theright

shouldbeappliedwheneverthetraileris

gvehicle,whetheronaslopeoronlevelground.

usedfor anyotherpurposethanparking,

rethetrailer istransported.

tsareoperatedby theswitchatthe

chis locatedatthefrontofthe vehicle

apsinside theboxandonthe boxcovers

hicleis loadedtosecurecargo.

use,thepintlehitchis carriedonthe

ndissecuredbytwopins.

oot.cablewhichmaybeoperatedbythe

quickreleasefordisconnectingthetrailerfrom

bracketwhichcarriesthecablerelease

erend.Bypullingthecotterpin andremoving

canswingdown,permittingcrankingofthe

LE.

o pintlehitch.

ngfrontend oftrailer.

ymovinglevertowardcenteroftrailer.

magemayresultif brakesarelockedwhen

edintandembyattachingthelunette

plerofthefronttrailer.

ed,caremustbetakentoplacethe heaviest


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LS

aPintleHitch

telyovertheaxle,so thattheweightwillbe

uchweightattherearmayresult inthe

hweightatthefront willmakehitching


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9/59

9

10

omplete,anduponarrivalatdestination

shouldbemade:

areinplaceinsideof coveratfrontofbox.

batteryleadsandconnectthemtoupper

.Thecombatzonesafetytaillightsshould

eswitchisturnedto the"ON"position.

es. Tiresshouldbeinflatedto 35-

ngpurposes,tiresareinflatedto 45-pound

rtainthatthey areallpresentinsidetool

cablesandsee thatthebrakesfunction

otwebstrapsarein positioninthebox,

b strapsareinplaceon theboxcovers.

TION.

e,thefollowingpointsshouldbechecked:

nkfor correctfunctioning.

ktopintle forkinksandwear.

fullyforcorrectfunctioningofhandles

gdowncargo,bothon lidandinsideof

d fastenersareingoodcondition.

box.

ectoperation.

and injuries.

rfunctioning.

ALT.

vehicleandcheckonthe securityof


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ecometwistedorkinked.

strapshavenotbecomeloosened,per-

comelost.

verheating.

or underinflation.

PERATION.

ectionshouldbemadesimilarto that

morethoroughanddetailed.Theinspection

entivemaintenance.Ifthedefectscannot

bereportedtothe nexthigherauthority.In

redin paragraph8,thefollowingpoints

betightenedafterthetrailerhas beenin

uldbecheckedperiodicallythereaftertobe

utsontheright-handwheelhaveright-hand

e left-handwheelhaveleft-handthreads.

ingpins forexcessivewearandreplace

olts;tightenor replace,asrequired.

ubs forevidenceofoverheating.

wheelanddetermineif bearingsare


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alpartof preventivemaintenance,deter-

heserviceabilityofpartsandassemblies.

t,influencemateriallyrepairsandopera-

ostimportantfactorsaffectingdependable

ife.

otionpartsshouldbelubricatedevery7

eoperation.Severeoperatingconditionsmay

tention,especiallyincaseswherevehiclecom-

ergedinwater,chemicals,snow,ormud.

cordoflubricationwillbekeptfor every

onnelwillexecuteachecksheetatregular

tualmileageanddateat whicheachcom-

ntionasprescribed.

vedtwiceayear,bearingsand oilretain-

gsarewornor retainersimpregnatedwith

ed.Wheelhubsand bearingsshouldbethor-

VENT,dry-cleaning,coatedlightlywithengine

ASE,generalpurpose,No.2.

pintle hitch,andrearcouplershould

occasionallywithanoilcan.


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12/59

7

es20

mustbekeptof eachmotorvehicle

epartment.ForthispurposetheOrdnance

o.7255),generallycalled"LogBook,"is

ndmustaccompanyitatall times.Thisbook

rdofthevehicle,fromwhichvaluableinfor-

tionandmaintenancecosts,etc.,areobtained,

ndersmustinsistthatcorrectentriesaremade.

keptin acanvascovertopreventitsbeing

ordofassignmentmustbedestroyedprior

e.Allotherr eferenceswhichmaybeposted

eorganizationmustalso bedeleted.

ntedbeforeissuetothe usingarmsand

ryearwillordinarilybeamplefor protection.

hismaterielwillbe paintedwithENAMEL,

erless.Theenamelmaybeappliedoverold

d oilpaintpreviouslyissuedbythe Ordnance

s insatisfactoryconditionforrepainting,

suallyissued readyforuseandare

They maybebrushedonsatisfactorilywhen

nalpackageconsistency,orwhenthinned

volumewithTHINNER.Theenamelwill

hinnedwith15percentbyvolumeofTHIN-

beused asathinnersinceit willimparta

namel.)Ifsprayed,itdrieshard enoughfor

nddries hardin16hours.

npaintingiscontainedinTM9-850.


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TING.

materielisin poorcondition,itismore

aintfromthesurfacethantouse sanding

terstripping,itwillthenbe necessarytoapply

nishing,shouldbeusedonwoodasa

amel.Itmaybe appliedeitherbybrushingor

actorilyasreceived,orafter theaddition

ntbyvolumeofTHINNER.Itwillbe dry

utes,andhardin5 to7hours.Forspraying,

t-morethan15percentbyvolumeofTHIN-

eappliedtothe PRIMER,synthetic,refin-

hours.

-inhibiting,forbaremetal,shouldbeused

suseandapplicationis similartothatout-

ove.

paintingdependspartlyontheselection

olargelyuponthecareusedi npreparingthe

lparts tobepaintedshouldbefree from

e,oil,andalkali,andmust bedry.

FACES.

eaningshouldbewashedina liquidsolu-

of SODAASHin8quartsof warmwater,

hentheyshouldbe rinsedinclearwater

Whenequipmentisin fairconditionand

ad placesshouldbetouchedwithENAMEL,

erless,andpermittedtodry.Thewholesur-

redwithPAPER,flint,No.1 andafinish

c,olive-drab,lusterless,appliedandallowed

ematerielis used.Iftheequipmentisin bad

bethoroughlysandedwithPAPER,flint,

acoatof PRIMER,synthetic,refinishing,

tleast16hours.Theywill thenbesand-

No.00,wipedfreefromdustand dirt,and

thetic,olive-drab,lusterless,appliedand

beforethematerielis used.

AGE.

jorconsiderationinpaintingordnance

ssecondary.Thecamouflageplanatpresent

ctors:color,gloss,andstenciling.

aintedwithENAMEL,synthetic,olive-

schosentoblendinreasonablywellwith the


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14/59

essenamelmakesavehicledifficultto

lativelygreatdistancesoverland.Avehicle

sypaintcanbedetectedmoreeasily andat

ncilnumbersonvehicleshavebeenelimi-

ephotographedfromtheair.A blue-drab

whichcannotbeso photographed.Itis

ancesexceeding75feet.

e.

bbingmustbe avoided,asitwillsmooth

gloss.Thevehicleshouldnot bewashed

areshouldbe takentoseethatthewashing

ngeorasoftrag. Thesurfaceshouldnever

twhilewet,or aglosswilldevelop.

vehicles,paintedwithlusterlessenamel,

eswerekeptwhenglossypaintwasused.A

asesthecamouflagevalue.Greasespots

OLVENT,dry-cleaning.Whateverportionof

ovedshouldbeallowedtoremain.

ax-treatedtarpaulinsonthesidesof a

gloss,whichshouldbe removedwithSOL-

intingwitholive-drabpaintwill be

thblue-drabpainttwiceyearly.

s,thepaintmaybecomesothickas to

es,presentinganunsightlyappearance.If

eold paintbyuseof alime-and-lyesolution

r REMOVER,paintandvarnish.Itis

eoflyeor otherpaintremoverbecompletely

uipmentbeperfectlydrybeforerepaintingis

thattheuse oflyesolutionsbelimitedto

onwood,thelye solutionmustnotbe

rfacefor morethanaminutebeforebeing

hesurfacewipeddrywith rags.Thesurfaces

intedaccordingtodirectionsin paragraph17.

NGDEVICES.

oilholes,andsimilarlubricatingdevices,

ree-fourthsofaninchin diameterateach

paintedwith ENAMEL,synthetic,gloss-

ybereadilylocated.Donotpaint openingsin

cantpasses.


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ONTHEVEHICLE

ereinincludestoolsforgeneralcare and

BookforOrdnanceVehicles(O.O.Form7255)

y.

ehicles(fig.5) arecarriedinthetool box.

ENCH,wheelstudsandhub

ithhandle

NDLE


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AS

RES.

stantdangerofgasattack,unpainted

coatedwithoil.Instrumentsareincluded

otectedinthismannerfromchemicalclouds

munitionisexcluded.Carewillbetakenthat

herorcanvasfittings.Materielnotin use

ersasfar aspossible.Ammunitionwillbe

sof materielthathavebeenexposedto

ndlewisitemustbe cleanedassoonaspossible

ng,orALCOHOL,denatured,andwiped

e coatedwithengineoil.

beenexposedtogasmustbe thoroughly

ed.To cleanammunitionuseAGENT,de-

ve,orifthis isnotavailable,strongsoapand

,wipeallammunitiondrywithcleanrags.

owderedAGENT,decontaminating(chlo-

ontaminatingcertaintypesofmaterielon

es),asflamingoccursthroughtheuse of

mustard.

chemicals(mustard,lewisite,etc.)from

psshouldbetaken:

ES.

onsacompletesuitofimpermeablecloth-

kwillbeworn.Immediatelyafterremovalof

withsoapandwater(preferablyhot)must

havecomeincontactwithmustard,ifeven

ardgetsintotheeye,or ifthevaporof

itis imperativethatcompletefirst-aid

20to 30minutesafterexposure.First-aid

M9-850 andFM21-40.


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18/59

Maintenance

NMAINTENANCE

8

ceandrepairsbythe vehiclecrewsand

ftheusingarmsisdeterminedbythe easewith

ccomplished,theamountoftimeavailable,

ealment,shelter,proximitytohostilefire,equip-

andskillof thepersonnel.Sinceallofthese

actsystemorprocedurecanbeprescribedor

S.

aning,lubricating,tighteningboltsand

adjustmentsofsubassemblies,orassemblies,

ngrepairsto,orreplacementof,thepart,

ythatcanbeaccomplishedwithoutdisassem-

rielconcerned,anddoesnotrequireheavy

ning,fitting,andoralining.

movingthepart,subassembly,orassembly

angingitfora new,reconditioned,orrebuilt

emblyasthecasemaybe.

RJOBS.

intenancedutiesforwhichtools andparts

ngarmpersonnel.Otherreplacementsand

tyofthe othermaintenancepersonnel,but

singarm personnel,whencircumstancesper-

fthepertinent ordnanceofficer.


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ies

e

ce


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.....32

34

of aframewhichissecuredtothe shackle

y meansofpins.Theframeismade fastby

theframeatitslower endandheldin

erend.Theseclevisesareweldedto therear

asepintleassemblyiscarriedby theframe

her,nut,andcotterpin.The releasecableis

housingandpassesoverapulleyand into

ed toabracketwhichishinged tothepintle

unettefitsintothe pintleandisheld

using.Whenthereleasecableispulled,it trips

d allowsthetrailerlunettetoslip outofthe

NK.

putintooperationbehindatank not

rpintle,the pintlehitchassemblymustbe

tank.Thepintlehitchassemblycanbe

3andM5,and MediumTanksM3andM4,

1-in.(2)

d7).

Frame.

shers,andcapscrewswhichsecuresupport

ort.

ytoTank.

klesfromtank.Placeframeassemblyon


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embly

stments


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.Attachassemblytoshacklelugswith hold-

seholdingpinsthroughupperholesof frame

ughlowerholesfor lighttanks.

port.

rtto cleviseswitharodendpin andcotter

ort topintlehitchframewithcapscrews,

ngboltsthroughholesin supportwhichwill

chedbehindtank.

ailer Lunette.

Remedy

ingReplacespring,

unette.

g.Freehousingandlubricatepin

allnewcable.

.

rfrayingor breaksandreplaceifdamaged.

ngspringfor breaksorpermanentset,and

y.

eholdingpinsandsupport clevispinfor

ornorbrokenpinsand cotterpins.

ndnuts.

usingpinand releasecablepulleywith

HASSEMBLY.

draiseit untilitsupportshitchassembly.

ameholdingpinsandfromsupportrod end

ndrodendpins andlowerassembly.

ITCHASSEMBLY.

ywithjackuntilframeholes lineupwith

ertholdingpins andsecurepinswithcotter

etsupporttoclevisesontankwith rodend


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teelplatesandhastwo hingedcoverson

dwithlatches.Thesidesand backofthe

frontandcoversare V^-inchthick,andthe

einsidedimensionsare:length56 inches,

epth28l/2inches.FourIVi-inchwideweb

d inplacebyeighteenstraploops inthe

Vi-inchwidewebstraps,5feetlong,are held

ersbyeightstraploops.Thesestraps are

o.

clampscrew)

/8-in.

d,'1/32-in.

VER.Removewingnutsandlockwashers

ertoboxandlowercoverontoframe(fig. 9).

Disconnecttoggleswitchtobatteryleads,

nstallation.Liftbatteriesoutofclips.

TCH.

open-end,'y2-in.

mswitch.Removenuts,lockwashers,and

eswitchJoboxandlift outswitchandbattery

oXighgfommetinbatterycover.

RAME(fig.10).

lampscrews)

78-in.

holdingboxtoframe.Opencoverson

oeachcornerofbox.Attachchainsto

erhoistandsettrailer brakes.Liftbox

nbox clearframe,andthenreleasetrailer

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dBatteriesInstalled

y(fig.11).Lowerbox togroundorfloor

chains(fig.12).

ndif theystick,placeafewdropsof

diftheydo notworkcorrectly,replace

ws)

-in.

NDCHAINSONBox.

clampscrews)

ornersofboxandfastenchainsto clamps.

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1orInstallation

E(fig.10).

ft boxhighenoughtoclearframe.Roll

oxandset trailerbrakes.Lowerboxonto

cingeightcapscrewsthroughbracketsonbox

andC-clamps.

TCH.

open-end,'^2-in.

tiononboxand securewithtwoscrews,

sertlightcablethroughrubber grommetin

onnectitto toggleswitchlowerterminal.

NDCONNECTBATTERYLEADS.Placebat-

boxsothat positiveterminalsareupand

wn.Connectleadsfromswitchupperterminals

teries.Thenegativeleadmust begrounded

erswitchbracketbolt.Thelightcablecon-

erminal.

VER.Placebatteryeoverinpositionover

washersandwingnuts.

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28/59

els

ET\''I


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adefrom4-inchchannelironandcarries

elaxlewhichisweldedin positiontothechan-

-inchbellyplateisweldedto thebottomof

rtstand isboltedtothe frontofthe

ed totherearframemember.Thebrake

otheaxle flangesandthebrakeleverassem-

dframememberimmediatelyinfrontofthe

roughtheextremefrontframeplate andis

stellatednut,andcotterpin.

.

1y,(!-in.

ubWRENCH,%-in.

open-end,llAz-m.

ws)WRENCH,open-end,%6-in.

Hsocket,y4-in.

H,wheelhub

graph37.

DHUBASSEMBLIES.Seeparagraph58b(1)

RASSEMBLY.

rakecablerodendpinsat thebrakelever.


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wswhichsecurebrakeleverassemblyto

mbly.

KINGPLATESWITHBRAKEASSEMBLIES.

H,socket,3/4-in.

wswhichsecurebrakecableconduitsupport

ffbrackets.Removecapscrewsandlock

ngplatestudsandpulloff brakebacking

liesandcableassemblies,fromaxle(fig.15).

LER.

H,socket,3/4-in.

ndcapscrewswhichsecurecouplertorear

oupler.

pullingoutplugsat rearoflights.Remove

ureeachtaillighttorear framememberand

ABLE.

H,open-end,7/,6-in.

apscrewswhichsecurelightcableclipsto

outlightcablefromframe.

nette.Removelunettenutandwasherand

ORTSTAND.

H1%-in.

,socket,3/4-in.

tsandcapscrewswhichsecurethesupport

estand.

dsandreplaceif threadsarestrippedor

dif anypartsaredamaged,theyshould

entorthethreadsare damagedbeyond

ymustbereplaced.

fortwistingorbendingandif anyisevi-


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^6-in.

ubWRENCH,7/8-in.

open-end,''/i2-in.

ws).WRENCH,open-end,%6-in.

H,socket,3/4-in.

CH,wheelhub.

amememberandsecureeachlight with

ABLE.

Hopen-end,^8-in.

ughgrommetsinframe.Push cableplugs

aillights.Securecableto framewithclips,

ts.

ER.

Hsocket,3/4-in.

nrearframe memberandsecurewithfour

s.

NGPLATESWITHBRAKEASSEMBLIES.

H,socket,3/4-in.

veraxleontostuds andsecurewithlock

astenbrakecableconduitstoframewith

capscrewsandnuts.

RASSEMBLY.

yinpositiononfront offrameandsecure

ndsafetynuts.Connectbrakecableassemblies

ndpinthroughcableyokeandlever and


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ORTSTAND.

H1'/j e-in.

Hsocket,3/4-in.

onon frontofframeandinstallfour cap

curingstandtoframe.

nfront framememberandsecureitwith

cotterpin.

LIESANDWHEELS.Seeparagraph58.

graph39.


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em44

gsystem45

nt..47

TINGSYSTEM.

ndardcombatzonesafetytypewith

olted totherearframemember.Powerfor

o"hot-shot"batterieswhichprovideamini

puse.Thebatteriesareheld byclipsweldedon

reconnectedbywirestoa toggleswitch.The

oabracketon thefrontofthe boxbetween

ctedtothe taillightsbyacablewhichis clipped

e frame.Thebatteriesandtoggleswitchare

sheld ontothefrontofthe boxbywingnuts.

dwherecablepassesthroughcoverandframe

ORLIGHTINGSYSTEM.

Remedy

Testbatteriesandreplaceif neces-

s.Cleanconnectionsandtighten.

acebatteries.

andrepair.

kandspliceorreplace

esealedlampunit.

NT.

VER.Takeoffwingnutsandl ockwashers

andlowercoverontoframe.


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sconnectleadsfromtoggleswitchtobat-

iftbatteryoutof clips.

Y.Placebatteryinclips,connectleads

eryterminalsandsecurebatterycover.NOTE:

with^positiveterminalsupand negative

eadsfromtheswitchupperterminalstothe

ries.Thenegativeleadmustbe groundedby

tchbracketbolt.The lightcableleadis

erminal.

LACEMENT.

open-end,l^2-n.

VER.Takeoffwingnutsandlockwashers

andlowercoverontoframe.

YLEADS.Removethumbnutswhichsecure

andpull leadsoffterminals.

ABLE.

-in.

hichsecureslightcabletoswitchterminal

TCH.

open-end,''/32-in.

rs,andscrewswhichsecuretoggleswitchto

withbatteryleads.Removenutsand washers

itchterminalsandpull offleads.

SWITCH.Installnewswitchinthereverse

m.

V2-in.

open-end,'^2-in.

ws)

graph37.

MBLY.

CH,i/2-in.

toftaillampsockets.Removecapscrews


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urecableclipstocenterchanneland remove

bly.

SSEMBLY.Installnewcableassemblyby

.

BLY.

enscoverandpulloffcoverand lens

IT.

.

tclampscrews)

V2-in.

open-end,'^2-in.

graph37.

BLY.

connectingplugsoutoflightsockets.

hichsecureeachlightassemblytorearframe

bly.

SSEMBLY.Reversetheorderofremoval


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37/59

DWHEELBEARINGS

51

oting52

intenanceandadjustments57

lacement58

CRIPTION.

ressedsteelcombattypeandhavea

0 C.T.rims.Eachwheelisfastenedtoits hub

hubiscarriedon twoopposedtaperedroller

eaxlebyaslotted nutandcotterpin.Thehub

tegrally.

20and areofthecombattypewith

UBLESHOOTING.

Remedy

place.

ent.Adjustasspecifiedinparagraph

orrectpressure.

rauthorityorre-

ewcap.

placevalvecap.

ed.Tightenorreplacecore.

epairtube.

c

mcapscrew


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DWHEELBEARINGS

jackundertrailer andraiseuntiltire

ETELY.

pto removevalvecore.Besurerodeflate

emovingcapscrewsfromthering.Otherwise

yblowoff theringcausingsevereinjuryor

LY.

ewswhichholdringtorimand pulloff

the beadsspreadawayfromthebead

dlockbyliftingwithspooniron. Ifthebead

thetire,pryit loosewiththespooniron.

ethetubeagain.Removetubeflapand

ouldberepairedbycoldpatching.Hot

houldnotbeattempted.

beenremovedforrepair,thetireshould

ndtheinsideexaminedfortearsand roughness.

s.

uallyand notoperatedwhenunder-

airintotubes,depressvalvemomentarilyto

rtinthe valve.Alwayskeepcapsonvalves

eignmatter.

armfuleffectonrubberandeveryattempt

ese substancesfromcomingincontactwith

mcapscrew


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39/59

beintotireand installtubeflap.

eandinflatetubeuntil beadsexpandto

Makesurethatvalveis centeredinholein

ockbetweenbeads.Expandbeadlockwith

hclamp.Deflatetubeuntil tirebeadscom-

LYONRIM.

so thatvalveiscenteredinvalveopening

ositionandinstalleighteencap screws,secur-

nflatetiretocorrectpressure,lowertrailer,

k.

.

ub

LY.Seeparagraph53.

(fig.14).

ubWRENCH,rimcapscrew

tsusingsmallend ofwheelhubwrench.


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DWHEELBEARINGS

Reversetheorderofremovaltoinstall

ssivelytightenoppositestudnutstoprevent

onotusean extensionorwrenchhandleto

ssivefofceotherthandirecthandeffort.Never

HUBMAINTENANCEANDAD-

rsfor pits,chipping,andwear.Replace

ollersaredamagedor worn.

sfor wear,pits,andscratches.Ifanyoneof

houldbe replaced.

eplaceanystuds whichhavestripped

scoring.If drumsarescored,theymustbe

exthigherauthority.

orwear.Replaceretainerifit iswornor

aringsareadjustableforwear,andtheir

dlonglifedependonproperadjustmentand

gsasfollows:

eelisfreeofground.

kesfullyso thatthereisabsolutelyno

handhandle,removehubcap.

ullcotterpin fromaxlethroughholein

dragisfelt onrevolvingwheelandthen

play;standdirectlyin frontofwheel,rest

chhandleon floorundertire,andlift upon

ndleupanddownwhileholding onefinger

essivebearingplaymaybequicklydetected.

rect,replacecotterpinandinstall hub

dandremovejack.

HUBREPLACEMENT.

ulic

ehub

ub


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jackundertrailer andraiseuntiltire just

TIREASSEMBLY.

ubWRENCH,wheelhub

ts.Right-handwheelstudshaveright-hand

elstudshaveleft-handthreads.Pullwheel

.

DHUBNUT(fig.15).

ubWRENCH,wheelhub

hubwrench,removehubcap.Pullcotter

n sideofhub.Removeaxlenut.

ARINGS(fig.15).Pullhubforwardand

on,leavingouterbearingconefree.Pullouter

henpull offhub,innerbearingconeandgrease

PS(fig.15).

f cuptoberemovedandhit firstoneside

her.Byalternatinginthis manner,thecup

the cupboreanddangerofwedgingthe cup

ed.

GCUPSINHUB.

R

bore.With hardwoodovercup,driveit

edge ofhub.Thenplaceoldcupover new

untilitis absolutelytightwithcupboreflange.

elyseatedbecauseifitis not,itwillalterthe

centersandpreventproperinstallationof

RINGS.Placebearingconeassembliesin

approximately%poundofGREASE,gen-

oilretainer inhubandslide hubandbearings

nd adjustbearingsasexplainedinpara-

n,hubcap,andwheelandtire assemblyby

al,stepsb (1)(2 )and(3) ofthisparagraph.


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DWHEELBEARINGS


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.

mechanical,9-byl3/i-inchexpanding

sareheld inpositionatthe rearendofthe

orpinand theshoereturnsprings,atthe'

screwandspring,andatthetop andbottom

eccentricwhichcontactstheuppershoeis

accessibleatthe rearofthebrakebacking

rkingpurposesonly,and areoperatedby

e frontoftheframeandconnectedtothe

assembly.

brakehandleverismovedtowardthe

ebrakecablesarepulledforwardand inturn

ever towhichtheyareattached.Themove-

leverrotatesthe armandcam.Thecam

partat theanchorpinandforcesthemin

ms.Whenthehandleveris broughtback

theshoereturn springspulltheshoesaway

marm springpullsthecamarm intoits

Remedy

Adjustasexplainedinpara-

enexthigherauthorityand

blesatrodend yoke.

able.

lacedamagedpart.


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45/59

nor

broken

that

eu-

yre-

weenshoe

etely.

ra-

es

a-

n.

n.

eelsarefreeofground.

rodend pinwhichsecureseachbrake

leverassembly.

olecoversfrombrakebackingplatesand

mbrakedrums.

entricadjustment.

rgagebetweenliningontop shoeand

cadjustmentindirectionofforwardwheel

justsnugatanchorandadjusting endsof

clocknut,holdingeccentriccarefullyin

turningadjusting screwtowardrimof

escrewdriverinsertedthroughbackingplate),

drivertowardcenterofwheel(fig.17).Con-

be justturnedbyhand.

wardhandleverassemblytoremoveall

natcamlevers.Adjust eachrodendyoke

enter yokeandleverassemblyfreely.Lock

s andinsertcotterpinsin rodendpins.


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ails

ub

DHUBASSEMBLY.Seeparagraph58b(1)

ABLES.

endpin whichsecuresbrakecablerod

embly.

RINGS.

anchorsprings,andadjustingscrewspring.

BLIES.Pushdownhold-downspringcups,

emove.Liftout brakeshoeassembliesand


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REWDRIVER,brake

NCH,adjustable,16-in.

ubWRENCH,open-end,Vb-in.

open-end,1-in.

H,wheelhub

S.Placebrakeshoesandadjustingscrew

dwheelofadjustingscrewisinfront ofback-

ng.

-DOWNSPRINGCUPS.Placecupsonhold-

nandtwist cups90degrees,lockingthemin

RINGS.

ng,anchorsprings,andcamarmspring.

nspring(theheavierspring)must alwaysbe

hhidesthe camoperatinglever.

EELASSEMBLIES.Seeparagraph58b(7).

aragraph61.

ubWRENCH,Vi-in.

9/6-in.

H,open-end,3/4-in.

NCH,wheelhub

OES.Seeparagraph62.

ONDUITSFROMFRAME.

H,9/-in.

wswhichsecurecableconduitsupport

ffbrackets,freeingconduits.

DCABLEASSEMBLY.

kwasherswhichsecureeachcableconduit

Unhookcablefromcamactuatingleverand

emblyoutofbackingplate.


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MCONDUIT.

n.

ejamnutand removeyokeandnut.Pull

duit.

REWDRIVER,brake

NCH,adjustable,16-in.

ubWRENCH,V2-in.

9/,6-in.

H,open-end,3/4-in.

NCH,wheelhub

MBLYINCONDUIT.

n.

hGREASE,generalpurpose,No.2,and

t.Installrodendyokejam nutandyokeon

embly.

ONDUITASSEMBLY.

erswhichsecurecableconduitto brake

duittofrontofframewithconduitsupport

nuts.Slipyokeatbrakeendof cableontocam

S.Seeparagraph63b(1)through(3).

EELASSEMBLIES.Seeparagraph58b(7),

aragraph61.


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E

aseofshipmentofindividualvehicles,

doesnotaccompanyitstransportation,vehicles

rtermasterforshipment.Insuchacasethe

bleforfurnishingthenecessarypersonneland

ockingequipment.Vehiclesareusuallyshipped

g),gondolas(36to 60ftlong),andthose types

whicharemostdesirable becauseoftheease

Cars.Transportationmustbein-

ecarsare insuitableconditiontocarrythe load

oundfloorsarerequired.Allloosenails, debris,

gralpart ofthecarandthe prescribedblocking

forLoading.

ngwiththeirvehicles,allloose property

dandsecuredin boxes,andhoodsshouldbe

s.

dtoatleast10 poundsabovethenormal

saggingorshiftingofvehiclein blocks.

heneverpossiblevehiclesshouldbe

tendrampandplatform.Movementfromone

e lengthofthetrain ismadepossiblebycross-

platformafter dismountingtherailroadcar

drampcanbemadefromrailroadties.

gavehicle,threemotions(lengthwise,side-

beprevented.

woodfloorcars shouldbenotlessthan

kscutfrommaterial6-by'6-inchor8-by 8-inch

trapiron shouldbeplacedcrosswiseoverthe

redto thefloor.Eachwheelwillbesecured


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51/59

blackannealedwire,bypassingthewire

dconnectingtheendsto thecarstakepockets.

retouchthetires.Eliminateend playby

netteto theneareststakepockets.Tighten

shortrodand twisting.Clothorburlapshould

berandthe blockstoreducewear.Blocking

eplay.I ncaseofmetalfloors,blockingbetween

required.

eshould beset.

mmanufacturertoarsenalorproving

rprovinggroundsto armypost,orindividual

ypostto anothermustbeplacarded"DO

ngare tobefoundin"SpecialSupple-

verningtheLoadingofMechanizedand

nt"publishedbytheAssociationofAmerican

MaintenanceDepartment,April1,1941.

structionsisalsogivenin FM101-10.

ainmodifications,thesameasthatindi-

e vehiclesareaccompanyingthetroops.

giventorust prevention,however.Allexposed

ingpartsshouldbecoatedwithCOMPOUND,

yarethosewhichare readyforimmediate

s than30days.Thevehiclesmustbe cleaned

beforetheyareplacedinstorageand the

icmaterialsmustbeprotectedaccordingto

eswillnotbeset.

.

yarethosewhichwill notberequiredfor

riod.Thestorageof vehiclesandequipment

forthissituation isreviewedinAR30-1055.

hicleswillbestoredinclosedbuildings

le.Inlieu thereof,coverbytarpaulin.Storage

efromcrushedrock,deepdust andsoil

ined.Vehiclesshouldberaisedandblocked

ound.Ifnotcompletelyservicedandmain-


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E

gedtoindicatewhatrepairsare requiredbefore

ndtubesshouldbe removedandkeptin

edcasingsshouldbe repaired,cleanedand

orcloth,andstored verticallysidebyside.

removedfromthecasing,cleaned,repaired,

npasteboardcartons;careshouldbetaken

ds,andthatasmall amountofairshouldbe

asesfromforming.

alpartsofthe bodyandchassisshould

AR850-18,latestrevision.

accessorieswillberepaintedor re-

Storage.Inspectionofvehiclesinstor-

hanonceeachmonth,underthedirectsuper-

officer,toseethatinstructionscontainedin

liedwith.

PublicDomain,

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53/59

sts70

71

LATURELISTS.

ndlubricatingmaterials;

ndmiscellaneousre-

LG-157

clatureListsareastabulated

NL'sis maintainedasthe

rSupplyIndex"OPSI

ATIONS.

bricating,andweldingma-

uedby theOrdnance

ructionsforordnancema-

r.

-565

nitsTM10-560

nanceTM10-525

ecautions,accidentsTM10-360

M10-520

R850-15

ns:.TM10-545

blicationoftheTechnical

abirdOrdnanceMotor

d

attackFM21-40

sFM5-25

wertoolsTM10-590

ing,includingtraining

-6

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54/59

iningrulesgoverningthe

dmotorizedArmy

eAssociationof

rationsandMainte-

,1941

l,organization,technical

10

equipmentAR850-18

equipmentAR30-1055

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55/59

sexposed15

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ARYOFWAR:

R17(6),9(2);IBn 9(1),17(4);1C9(4),

ls,seeFM21-6)


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Tm 9-791 M8 ARMORED TRAILER

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