tm 9-815 fwd har-1
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DELHAR-1)
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RDEPARTMENT
ne10,1943
DELHAR-1)-J[y\^i )f
onofthe
eFourWheelDrive AutoCo.)
UCTIONS
33-9
4-710-26
ntrols
ual
ve
1736-44
5
onthe
ENANCEINSTRUCTIONS
n32-3362-70
ve
1-84
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WHEELDRIVEMODELHAR-1)
nSpareParts
d
05
13
7114-133
7
5
8186-202
93203-253
94
-110295-298
305
2306-328
es123-127329-331
-133332-336
Absorbers.134-138337-343
144344-352
50353-366
54A367-372
3-386
ake-Off..165-173387-402
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UCTIONS
for theinformationandguidanceofthe
ionoftheFWD4x4Model HAR-1
ck,thismanualcontainsdescriptionsofthe
blies,andfunctionalsystems,includinginstruc-
roperation,inspection,adjustments,minor
ent.Specificinformationfortheguidanceof
w)iscontainedinPartI, sectionsItoIX,
heguidanceoforganizationalmaintenance
s)iscontainedinPart II,sectionsXto
atureoftherepair,modification,oradjust-
or facilitiesoftheunit,theresponsibleord-
formed,sothattrainedpersonnelwithsuitable
beprovided,orproperinstructionsissued.
rough5).
rgoTruckisa four-wheeldrivechassis
cylinderL-headtypeofengine.Ithasacon-
aseassembly,withacenterdifferentialsimilar
ontandrearaxles.Amilitary typeofcargo
assiswithseatingcapacityfortheusingarms.
utchandconstantmeshclashtype
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WHEELDRIVE MODELHAR-1)
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WHEELDRIVEMODELHAR-1)
y11,425Ib
d19,425Ib
8Vift
ransfercase)ISVzin.
whooks
d35mph
qt
t
netank)40gal
3qt
ycapacity2qt
75pt
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R-1Front
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WHEELDRIVEMODELHAR-1)
R-1Rear
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R-1Top
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WHEELDRIVEMODELHAR-1)
ON
tis essentialthatthedriverbethor-
ntrolsandtheir locationbeforeattemptingto
rivershouldstudythecontrols(figs. 6to12),
whichare notfoundonstandardvehicles.
7). Theignitionswitchislocateddirectly
hisswitchisself-containedanddoesnotrequire
ration.Itisconstructedwithathumbpiece
e lefttocompletetheelectricalcircuitneces-
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ON
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WHEELDRIVE MODELHAR-1)
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ON
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WHEELDRIVEMODELHAR-1)
.6and7). Thelightingswitchcontrols
hts.Bypullingthe switchouttothefirst
tsareturnedon.Theselights consistofblack-
ndblackoutsignallight.Bydepressingthe
pullingtheswitchtothesecondposition,the
.This includestheserviceheadlightsandtail-
ompleted,sothattheservicestoplightwill
s onandwithinthedash panel.Theservice
epressingthebrakepedal.Bypulling thelight
othethirdposition,the servicestoplightonly
meoperation.Thedashlights areoperated
e dashpanel(step(4)below).
NTROLSWITCH(fig.8).Thisswitch,
mmerswitch,islocatedjusttothe leftofthe
uttonoperatedby theleftfoot.It controls
theserviceheadlightsandoperatesonly
tchis pulledouttoits secondposition.To
withtheleft foottoraiseorlower thehead-
owbeamsalternateeachtimetheswitchis
ryto keeppressureonthebuttonafterthe
sthe switchlocksitselfeachtimethebutton
and8). Thepanellightsarecontrolled
Thisswitchisoperatingonlywhenthe main
osecondposition(servicelightson).The
heswitchispulledout.
s.7and8).Thechokecontrolconsists
wireandhousingassemblywhichissecuredto
ntrolvalve.Thebuttonlocatedonthedash
entifiedbyaletter"C"on itsface.Itclosesthe
arburetorwhenitispulled out.Thisprevents
ngairandconsequentlyitfeedsa richergaso-
Pull thechokecontroloutwhenstartinga
pushit inastheenginebecomeswarm.NOTE:
okebuttonis pushedinwhentheenginehas
temperature.Toneglectthiswillcausea
gine.Thisresultsin toomuchrawfuelin the
oilfilmfromthe cylinderwallsanddilutes
vechokingalsowastesfuel.Theuseofthe
aryinstartingawarmengine.
gs.7and8). Thethrottlecontrolcon-
dtoa wireandhousingassemblywhichis
hrottlearmat itsoppositeend.Thebuttonis
theoil gagetotheleftof theignitionswitch
r"T"onitsface.Its purposeistoprovidein-
ondthatprovidedbytheidling adjustmenton
hieflyinstartingtheenginewhennot con-
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ON
OaCFORf
HANDLE
tialLockLever
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WHEELDRIVEMODELHAR-1)
he footaccelerator.Pullingthebuttonout-
tertheenginehas beenstarted,thebutton
ccelerationordecelerationcontrolledbythe
LLOCKLEVER(fig.8).Thecenterdif-
edonthe dashpaneljusttothe leftofthe
esameansoflockingand unlockingthecenter
per
otbeconfusedwithdeclutchingdevicesand
usedonother vehicles.)Whenitisnecessary
the leveroutandthenturn thehandletothe
dsleevein thecenterdifferentialdonot
ringtensionwillautomaticallyengagethem
reachedwhilethe truckisinmotion.For
fertoparagraph6hand i.
TON(fig.9).Thestarter motorbutton,
steeringcolumnandabovetheaccelerator
foroperationwiththeright foot.Itspurposeis
circuittothestartermotor,so thatitcancrank
essthebuttonwith therightfootandhold it
ntilthe enginestarts.CAUTION:Donot
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ON
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WHEELDRIVEMODELHAR-1)
ilethe engineisrunningorwhilethe shifting
g.10).Thisvehicleis equippedwith
econtrolisasmall individualbuttonlocated
douttooperatethewindshieldwiperblades.
L(fig.11).Theacceleratorpedal,lo-
therightofthesteering gear,isusedtocon-
ght footwhiledrivingthetruck.
elandHornButton
1).Theclutchpedal,locatedonthe
tof theoperator,istobe operatedwiththe
edaltothe floorboardsdisengagestheclutch
arsmaybe shifted.
).Thefootbrakepedal,alsolocated
rectlyinfrontofthe operator,isoperatedby
ssedtoslowdownorstop thevehicle.
-OFF(fig.11).Thehandlever,nearest
gfromthefloor boards,controlsthewinch.
ehigh speedforwindingthecableandex-
owspeedfor winding.Centerpositionisthe
g.Therearetwoneutralpositions,one between
etweenlowand reverse.
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ON
RSHIFTLEVER(fig.11).Thisleveris
winchcontrollever.Itspurposeis tocontrol
hetransmission.Thediagram(fig.15) shows
eleverfor variousgearselectionsinthetrans-
ybesurethat thegearshiftleverisin the
rtingtheengine.
PARKING)(fig.11).Thisleveristhe one
he driver.Itisused principallyforholding
eration
ehandbrakeis releasedwhentheleverisin
on,andappliedwhenpulledbacktowardthe
eleverwilllockin position.Inordertomove
ustbereleasedbysqueezingit tothelever
2).Thehornbutton,locatedinthe
el,isfor thepurposeofsoundingthehorn.It is
nward.
MENTS(fig.13).
hieldisfittedwithadjustablethrow-out
hewindshieldtobe movedoutatthebottom.
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WHEELDRIVEMODELHAR-1)
senthethumbnutsoneachthrow-outarm,
edesiredposition,and tightenthethumbnuts.
designedwithahingearrangementat
tirewindshieldandframeworkmaybetipped
t overthehood.Thisarrangementmaybe
stopis notused.Toplacethewindshieldin
umbnuts,tilt thewindshieldforwardasfar
allow,andtightenthethumbnuts.
ted,the prestartinginspectionoutlined
omplished.Thefollowingstepsinstartingthe
voidunnecessaryenginewearin thewarm-
are satisfactoryunderaverageoperating
er.
tleverinneutral position.
artway.
NOTE:Itis notnecessarytochokea
and pushthestarterbutton.NOTE:
depressclutchpedaltoeasethestartingload.
alandadjustthe handthrottletoaposi-
rom racing.Ifthechokewasused,pushin
y.
ut15minutestofill allthebearingswith
t buildupatonce,especiallyincoldweather,
willbe necessarytofillthelinesand buildup
gineis readytobeput underload.Oilpressure
sminimumatidlingand 40poundsmaximum
hNewEngines.
ouldbetakenwithnewenginesto avoid
ubricatingoilinthefuel tank.Useaboutone
verythreetofive gallonsoffuelduringthe
sandinject ateaspoonfuloflightcylin-
ensurelubricationofthepistonsand cylinders
s.
ngine,inspectit thoroughlyandseethat
erworkingorder.
soriesmusthaveproperlubricationat
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ON
eisfilledwiththepropergradeof oil(par.
mpandfanhaveproperlubrication.All
calequipment,etc.shouldbelubricatedin
onsinsectionVI.
on,propercoolingof theengineisthe
n.Besurethatthecoolingsystemis full,that
oneofthehose connectionshavecollapsedor
reverpossible,usesoftor distilledwaterinthe
doralkalinewaters.
esignedtooperatemostsmoothlyand
of65to68octaneor better,withtheautomatic
2degreesbefore"T.D.C."(Refertosection
he cleanestfuelobtainableandkeepthefuel
ndwater.NOTE:Alwayskeepthefuel tank
on.
dwithagovernorwhichwillmaintainthe
its,.aslisted inparagraph3.Undernocondi-
rmissiblespeedsbeexceeded.
ershouldbeservicedbeforethetruckis
tioning,engagethestartinghandcrank
hestartingcrankwiththe thumbonthesame
mayresultin abrokenwristifthe engineshould
theengineshouldstarteasilywith thethirdor
hoke,leavetheignition"OFF",crankfour
ndersfullofmixture,openthechoke,turn
k.
urntheengineover,firstcheckthebattery
11).Continuedattemptstostart withalow
nstartercommutator.
securedincoldweatheriftheclutchis
hisdisconnectstheenginefromthetransmis-
ryforthestarterto turntheengineandtrans-
ime.
agesintheflywheelandlocks,releasethe
fthe ignitionswitch,releasetheparkingbrake,
ninhigh gear.Rockthevehiclebackwardand
releasefromtheflywheel,loosenthestarting
es.Besure totightenthecapscrewsbefore
ermotor(par. 84).
heengineutilizesa pressurecooling
mthebottomof theradiatorisdrawninto a
rcesitthroughtheenginewaterjackets,outthe
kto theradiatorforcooling.
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WHEELDRIVEMODELHAR-1)
mDrainCocks
NGSYSTEM(fig.14).Draincocksare
softhe coolingsystem.Thereisadraincock
derblock,oneonthe waterpump,andoneat
iatorinlet pipe.Makesurethatnoneof
.
GESTION.Covertheradiatorpartlyor com-
operation.Toavoidcoolingsystemfreeze-ups,
recommended(par.10).
buretorchokeshouldneverbeleftclosed
engineis running.Theclosingofthechoke
hemixture.Richmixturesalwaysheatupthe
rntheexhaustvalves.Alwaysmakecertain
eopen whentheengineisrunning.
LE.
velRoad.Afterthe engineisthor-
oximately140F,thevehiclemaybe movedas
ke.
ypushingthe clutchpedalfullydown.
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ON
firstorsecondspeedgear,depending
alslowlyandat thesametimeaccelerate
wnon theacceleratorpedal.
d,increasethetruck'sspeed.NOTE:Do
omentum,removefootfromaccelerator
geclutch.Shiftthetransmissionintothenext
sestepsuntilthe transmissionisplacedin
theparkingbrake.Disengagethe
.Engage theclutchslowlyandatthesame
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WHEELDRIVEMODELHAR-1)
eandgraduallyreleasetheparkingbrakeas the
ybenecessarytoshift toalowergear
complishedbydouble-clutchingtoassurea
ansmissiongears.Disengageclutchandshiftthe
osition.Releasetheclutchpedalandmomen-
atortoincreasethespeedofthecountershaft
Thistends tosynchronizethematinggears.
edbydisengagingtheclutchpedalandshifting
extlowergear.The operatormustremember
enthecountershaftandmainshaftgears tobe
ned,otherwiseasmoothshiftcannotbemade.
YTIME
OTEXCEED
ar.Beforeattemptingtoshiftinto
k.Removefootfromacceleratoranddisengage
sionshiftleverintotheposition (R)(fig.15).
raduallyandatthe sametimeacceleratethe
nthe acceleratorpedal.
(Maximum.)Thistruckisequipped
tsthemaximumpermissibleroadspeeds.The
epositionin whichthetransmissionshiftlever
N:Whendrivingdownahill, donotpermit
ximumroadspeedspecifiedinparagraph3
th,orfifth gear.Excessiveenginespeedunder
lopintobearing,piston,andvalvefailures.
vel.Whenapproachingloosesand
etruckwillbe movingtoofastforgoodcontrol
he enginemaypropelthetruckata higher
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ON
oosesandorgravelon accountofhardsteering
toverspeedengineas spinningthewheelswill
ayinto thesoftsurfaceanddifficultymaybe
stalled.Referto paragraph6handi foraddi-
pproachingloosesandandgravel.
rain.Whena truckisbeingdriven
udgmentshouldbeobserved.Theenginespeed
ningwheelswillcausea "jumping"effect.This
heeldiggingdeeperinthesoft surfaceandmay
ponentpartsofthe truck.Refertostepshandi
mationwhenapproachingsoftterrain.
CK-THISTRUCKDRIVES
MES.THECENTERDIFFERC.NTIAL
ERCOMEW/tfELSLIPPAGEOHEITHER
NGAGEDBEFOftESLIPPAGEOCCURS.
SHOULDTHISLOCKBEKtPTCH6A6LD
FSLIPPAGENOLON6CJ?EXISTS.S
UALFORDETAILS.
ANDLE
AND
ATCHES
ntialWarningPlate
fferentialLockLever.Thecenter
eratedfromthedriver'sseat. Aconnecting
theleverandleadsto thetransfercasewhere
ockarelocated.Underordinarydrivingcon-
eftunlocked.Somedrivershavethe opinion
veonthefourwheelsunless thecenterdiffer-
ttrue;thetruckalwaysdriveson fourwheels,
erentialprovidesforadditionaltractionunder
ever,thismechanismshouldnotbelockedcon-
edonlyfor emergencyuseunderthefollowing
sandorgravelpits;climbinghills whichhave
someparts ofthegrade;plowingthroughsnow
es,streams,plowedfields,andoverunusually
Differential.Thedriver ofthe
ckbeforereachingwhatappearstobe abad
gagethe lockwhilethetruckistravelingat
heelshaveequaltraction,butthelockmust
uckis travelingunlessequaltractiondoes
tialtroubleiscausedbydrivers engagingthe
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WHEELDRIVEMODELHAR-1)
onditiondoesnotexist.Ifthe truckhasbegun
rearwheelshavetractionwhile thefrontwheels
bebroughttoa stopbeforethedifferential
ethelockwhileone wheelisspinningandthe
bletorunningapleasurecarinhigh gearand
everse.Whenthetruckis movingthrough
strainon anyparticularpart,sincethelocking
akestheentiretrucka: singledriving
e.In theeventthateitherthefront
isconnectthepropellershaftleadingtothe
versaljoints,andremovethedrivingspiders
nectingthepropellershaftandremovingthe
tfurtherdamagetothe disabledaxleassembly.
al(par.4a(7) ).
E.
erator.Applythebrakesgraduallyby
epedal.Whenthe truckhasbeensloweddown
engagetheclutchby pressingdownonclutch
ionshiftleverintoneutralposition.When the
etestop,releasethe clutchpedalandapply
stop theengine,turnofftheignition
eengineshouldbestoppedwith thethrottle
speedincreasedbeforeturning offtheignition.
stop,itwillblowout allvaporsandresidual
asolinevaporin thecombustionchambers.
urned off.
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NTROLSANDOPERATION
gs.18to20).
vehiclehasa10,000-poundcapacity.It
dofthetruckandi ssupportedbetweenthe
chOperation
winchis transmittedfromthemain
powertake-offunit,mountedtotheleftside
ghthedriveshaftto thewormshaftofthe
ythe powertake-offshiftleverinthe
wertake-offineitherthetwo forwardorone
eutralpointsarebetweeneachof thegear
e controlleverwillsecurethetake-offinone
roperationis explainedinparagraph4a(13 ).
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WHEELDRIVEMODELHAR-1)
H
ATASPEED
Plate
outjawclutchto releasedposition
hookontoload;thenengagethejawclutch
hpedal,shiftpowertake-offleverinto
(high,for lightpulls;low,forheavypulls).
ually;winchwillwindcable.
utchpedalandshiftpowertake-offinto
aftautomaticbrakewillholdtensiononline
edintoreversegear, oruntiltruckis driven
werorreleasetensionon cable,dis-
powertake-offintoreversegear,andrelease
ateinreverseand releasethewinchline.
easealoadwiththe jawclutch"out";al-
nchline andsecuretoatree withthe
gejawclutchandfollowstepd(above).
-onthefirstlayeris mostimportant.
betightagainsteachotherso thecoilsonthe
nbetweenthefirstlayer.As thecableis
ped everyfewincheswithawoodenblockto
es.NOTE:Winch-pullingspeedsarebased
edof800 revolutionsperminute,whichshould
ngwinch.
nuse,andthe lineproperlycoiledin
engagedandlockthepowertake-offshift
ngusedtoassistthe vehicle,withthe
vethepowertake-offinlowgear.Thetrans-
owgear.
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NTROLSANDOPERATION
POUNDS
INLOWSPLLDOfTML-OF
ATWHC.MTHISWINCHISUSED
WITHWHtlLSOflVIHG,THL
LOWSPC.ID,AMDTHf.
A.
AftAKTtLRLQulPt.THAT
RATLDATALLTiMtSAS'
TLRLGULATIOMS.
tyPlate
tomaticbrakeisabandtypeconsist-
dadiskkeyedtothe wormshaft.Itprevents
enthepowertake-offis inneutralposition,or
ed.Totestthebrake,placethe truckatthe
enthewinchlinetoanothertruckat thebottom
lingitupthe grade.Afterashorthaul,release
hwillstoppulling,and thetruckbeingpulled
the brakeiscorrectlyadjusted.
niver8aljointis connectedtothewinch
topreventoverloadingofpowertake-offand
bricationGuide(sectionVI).
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WHEELDRIVEMODELHAR-1)
SUALCONDITIONS
0
on11
2
RATION.
tenanceofautomotivevehiclesatlow
torswhichdonotexistatnormaltemperatures.
cepersonnelmustspendmoretimeinprotec-
togivethisextraservicewillresult inactual
duntoldexpenses,andalsofailuretostart.
vebeendividedinto2ranges:-10F to
gineand lubricantsundergochangesin
-30F.In manycasesaccessoriesandequip-
engine,fuel,and intakeairarerequired.
tionthattheoperatorshould befamiliar
hicleincoldweather:
ionoficecrystalsfromsmallquantities
imescausesconsiderabletrouble.Thefollow-
ollowedtokeepwaterout ofthefueltank:
asuitable strainer.CAUTION:A
mustbemaintainedbetweenthefuelcontainer
eltankand containerareindependently
spossible.
edalcoholtoatankofgasolineto absorb
ense.
rums.
rumsdry;allowabout4 inchesoffuelto
bricationattemperaturesabove-10F
thismanualandinthe LubricationGuide.For
oneof thefollowingmeasuresmustbetaken
lable:
enclosure,ifpossible,whenit isnotbeing
opped,drainthecrankcaseoilwhileitis
warmplaceuntil vehicleistobeoperated
otavailable,heattheoilbeforeputtingit in
theoil toohot.Heatonlyto apointwherethe
withoutburning.)CAUTION:Placeatagin
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SUALCONDITIONS
cabto warnpersonnelthatthecrankcaseis
tarpaulin.Aboutthreehoursbeforethe
acefirepotsunderthetarpaulin.A VanPrag,
ypeof blowtorchorkerosenelanternmaybe
onforfirehazardsinvolved,theflamemaybe
n.
hgasoline.Thetablebelowshows the
addedtotheoilprescribedon theLubrication
hequantitiesofdiluents willformmixtures
temperaturesindicated.
sfirst diluted,turntheengineoversev-
luentthoroughly.
y.
yleneglycol(Prestone)isprescribedfor
Ifethyleneglycolis notavailable,otherma-
lowingtablegives threepermissiblematerials
dedtopreventfreezingatindicatedtempera-
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WHEELDRIVEMODELHAR-1)
dedtocoolingsystem,addaboutone gal-
yofthecoolingsystemliquid.
celerateandmaintainengineoperating
trengthoffanbelt.Replacerubberfan
yntheticbeltsbelow -20F.
mpis ingoodoperatingcondition.
ICALPARTS.
ged,withhydrometerreadingbetween
chargedbatterywillfreezeand ruptureat5F.
ectricalwiringaccessories(sparkplugs,
r)topreventundueresistance.Makesureall
.005-in.lessthanthatrecommendedfor
onditions.
erbrushes,commutators,andbearings.
andbrushesareclean.
greaseordirtis onthestarterthrow-out
elow-15Fdilutelubricantsprescribed
ercentgasoline.Ifcircumstancespreclude
gearcaseswitha blow-torch.Playthetorch
r case;donotconcentratetheheatinonespot.
UBRICANTS.
g,andotherlubricantsprescribedforuse
ctorylubricationaslowas -30F.Forsus-
w-30F,use greasecomparabletoGREASE,
EASE,O.D.,No.00.UseOIL,tigine,crank-
rhousing.
dshockabsorberfluidsremainfluidat
ed.
RECAUTIONS.
tosecurethe airtofuelratio requiredfor
eckthebutterflyvalvetoseethatitclosesall
ctionsproperly.
lfromthe aircleaners.Below-30F
ntly.
ters attemperaturesbelow-30F.
edspeedometercablesatthedriveend
mperaturesofbelow-30 F.
mentbulb,strainer,etc.,inthefuel sys-
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SUALCONDITIONS
ntly.
ne,pull thechokeallthewayoutand
untiltheenginehaswarmedup.Turn the
ewith thestarterandreleasestartingpedal
s.Aftertheenginehasstarted,idle ituntilit
ytorunsmoothly.Donot racetheengineim-
tincreasetheenginespeedandthen turn
the throttleatthesametime.
es.Thefollowinglistofcoldweather
oyedatthediscretionofofficersinchargeof
lapsibleshedsareuseful forcovering
engines.
or VanPragblow-torches,ordinaryblow-
senelanternscanbeused forheatingvehicles.
itiesfor changingbatteriesquicklyare
metalstandsareusefulforheating
newillhelppreventice formationinside
aturedalcohol,aboutone-halfpintto a
icultiesfromwaterin gasoline.
mprovisedlocallyandhelpto keepthe
emperatures.
OPERATION.
,thefollowingunitsshouldbechecked:
uldbekept cleanandfull.
shouldbekeptfreefrom bugsandfor-
fectfreecirculationofair.
properlyadjusted.
requiresthe enginetolaboratlow engine
if practical,asthiswillcauseoverheatingdue
ndair circulation.
sitmaybe advisabletoremovethehood
restrictiontothe flowofair.
eindicator,andifthe needlegoesinthe
nd investigatethecause.Thevehicleshould
possible,andpermittedtocool.
ksarefrequent.Thefuellinesand fuel
wayfromareasofgreat heatandshouldnot
om thefan.Ifvaporlocksoccur,itmay be
nesandfuel pumpswhichcannotberelocated.
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WHEELDRIVEMODELHAR-1)
ERRAIN.
eCovers.
nd intheairin thedesert,moreisstirred
cles,andduringasandstormtheamountmay
vement.Withoutadequateprotectivemeasures
etors,plugfeedlines,scorethe cylinders,dam-
reasethewearon allbearings.Theoilbath
gineifitis keptclean.Constant,closesuper-
ofair filtersaretheonlywaysof insuring
theengine.Thecrankcasebreatheropening
neffectiveaircleaner.Air cleanersshouldbe
deviceusingan airintake,suchasavacuum
ompressor.Aircleanersshouldbelocatedwhere
eleastdirtpollution.
nkcaseandfuellineswhenreplenishing
greatcareisusedduring theseoperations.The
off thecapsbeforeremovingandoffthe
containersbeforetheyareused.Itmaybe neces-
stoprotectfrontwheel jointsanddistributors.
lure ofinstrumentsinpanelif thesearenot
apemaybeusedforthispurpose.
twill requiremovementoveralltypes
uitableforeverytypeofsurfacewhichwillbe
ltywillbemetinsand.Air pressuremustbe
roundsurface.Oversandorsoft-powdered
persquareinchshould bereducedtothemini-
sthearea incontactwiththegroundis in-
selftotheirregularitiesof thesandwithout
t.Theminimumpressuremustbedetermined
ehicle.Tiresonflat-baserimswillspinon the
rewnground,tiresmustbeas fullyinflated
ofthevehiclepermit.Atlowpressuretheinner-
bebrokenby theviolentinwardbendingwhen
resultingchafingwillwearouttheinner tube
pparentfrom theoutsideofthetire.Since a
keavehicleoverdifferentkinds ofground,
ssary.
heconstantshockandvibrationwhich
erroughgroundfrequentlycausescableclipsto
ebrokenorshorted.Frequentinspectionof
eandspring washersinsertedunderthenutsif
nitsmaycausetroublebecauseofbreaking
rstickingofregulatorpoints.Driversshould
efullyasanyotherinstrument,sinceover-
ufficienttobuckletheplates,alwaysresults
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SUALCONDITIONS
st difficulttoobtaininthe desert.Thehigh
drinkingand forradiatorsforbidsitsuse in
ustbecarefullyloaded.Excessivebreak-
onstantsourceoftroublein thevehiclesused
oingisveryhardon springsandtheyare
ding,improperdistributionofload,orshifting
efromsoftsand thedrivingwheelsmust
rvehicleswith singletiresondrivingwheels
provisionof apairofsteel channelsfouror
onthe channelsshouldhaveacurvedbottom
holewidthof thetireatlow pressure.Itshould
sidestopreventthe tiresrunningoff,andthen
edflange oneachsidetostrengthenthe
rojectingfromtheundersideandholes
preventthe channelfromslippingunder
beused toformaroadwayforfrontwheels.
ylateralrungsofsteel sewnbetweentwothick-
ellentforthispurpose.Suchmatscan berolled
outinfrontoieachfrontwheelwhenneeded.
donthevehicle,asingleround wooden
f channels.Thesparshouldbeplacedbetween
.
ttempttogetoutof thesandbymeans
hevehiclehasbrokenthroughthecrustand
se,thedrivingwheelswillmerelysinkdeeper
onwill bemademoredifficult.
ough thecrustandbecomesstuck,ade-
emadeinfront(or,if backingout,inrear)of
arendsofthechannelsor matsareona level
tread,andsothatthe slopeofthechannelsis
donethe enginewillbeunabletoset thevehicle
petoenablethewheelsto begintodriveagainst
catingequipment.Onceinmotion,thevehicle
roundorstoppedheadeddownaslopeto avoid
echannelshavebeenloadedon.
ghthecrust whenstarting,vehicles
possible,onhardgroundor headeddowna
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WHEELDRIVEMODELHAR-1)
NTIVEMAINTENANCESERVICE
.14
15
ndweeklyservice17
ficiencyitisnecessarythatthevehiclebe
atintervalsduringtheday,andeachweek,in
tenanceservicesbeperformed,andthatdefects
rrectedbeforetheyresultinserious damageor
rthinthis sectionarethoseperformedbydriver
duringoperation,athalt,andafter operation
enanceservicesareoutlinedforall
ackof DriversTripTicketandP.M.Service
.However,inthismanual,certainprocedures
ehiclearedeleted,andinsome casesthereis
calsequenceoftheitemnumbersinorder to
eandeffortin theperformanceoftheservices.
ofeachitemappliesalso toanysupporting
ndusuallyincludesachecktoseewhetherthe
correctlyassembled,secure,orexcessivelyworn.
condition"isusuallyan externalvisual
hethertheunitisdamagedbeyondsafeor serv-
oodcondition,"isexplainedfurtherbythe
ortwisted,notchafedor burned,notbroken
yed,notdentedor collapsed,nottornorcut.
toseethatit iscorrectlyassembledis
nspectiontoseewhetherit isinits "normal
vehicle.
termineifit is"secure"isusuallyan
,ahand-feel,orapry-barcheckforloosenessin
nshouldincludeanybrackets,lockwashers,
cotterpinsusedi ntheassembly.
hisafrequentlyusedterm,willbe under-
o,or beyond,serviceablelimits,andlikelyto
acedbeforethenextscheduledinspection.
ctoryoperatingcharacteristicsbeyond
o correctmustbereportedattheearliest oppor-
dividualin authority.
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NTIVEMAINTENANCESERVICE
ERVICE.
entirelyomitted,eveninextremetactical
hlytrained,driverwillbeableto quicklydeter-
ehicle.
erationserviceconsistsofinspectingitems
heproceduredescribed,andcorrectingor
s.Uponcompletionoftheservice,resultsshould
echiefof sectionorotherdesignatedindividual.
DDAMAGE.Lookforanyinjuryto vehicle
orequipment,causedbytamperingorsabotage,
hell-firesinceparkingvehicle.Lookunder
gor sabotage,suchasloosenedordamaged
orwaterlines,or disconnectedlinkage.
SHER.Inspectforcorrosion,fullcharge,
emounting.
WATER.
ntintankandsparecans.
evel.Maintainleveltofullmark.Addoil
onditionofcoolant,andvalueofantifreeze
OTE:Anyappreciablechangeinlevel
erationserviceshouldbeinvestigatedandre-
ANDDRIVES.Examineallaccessoriessuch
regulator,startingmotor,fuelpump,fuel
orlooseconnectionsormountings,andleaks.
AL.Examinegroundundervehiclefor
er,gearoilor brakefluidleaks.
UP.Startengineandnote anytendency
rankingspeed,improperornoisyengaging
rtercontrolisoperated.Sethandthrottle to
thewarm-upperiodproceedwiththefollowing
s.NOTE;Duringenginewarm-upperiodlisten
nstrumentindicationsandengineperformance
temperaturerise.
tartingengine,test operationofchoke
onnectionsforlooseness.Asenginewarmsup,
preventover-chokinganddilutedengineoil.
malreading40 to45poundsat1000
widle,15pounds.NOTE:Ifgagedoes not
stopengineimmediatelyandinvestigatecause.
estartsandis runningatfastidle,ammeter
e( +)chargeratefor ashortperioduntil
erythecurrentusedin starting.Afterthisperiod
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WHEELDRIVEMODELHAR-1)
zeroor slightpositive(-)-)chargewith lights
f.
rapproximateamountoffuelin tank.
havebeenfilledduringthe after-operation
uldregisterfull.
rmaloperatingenginetemperature150F
ureshouldincreasegraduallyduringwarm-up
peratureafterreasonablewarm-upperiodmay
kopen.
NDSHIELDWIPERS.
permitting,testhorn.
pectformissingor damagedbladesor
descontactglassproperly.Startwipermotors
operlythrough theirfullstroke.
EAR-VIEWMIRRORS.Inspectfordam-
s,ordiscoloredglass.Cleanwindshieldglass.
erly.
REFLECTORS.Tacticalsituationpermit-
ee thatalllampslight.See thatlampsare
cleanand notbroken.
FLANGENUTS.Seethattheyare all
ure60pounds (maximum)cool.Look
ere arenoembeddedobjectsintreadsor
DSUSPENSION.Seethattheyare secure
d.
NKAGE.Steeringgearcaseandall con-
cure,notdamagedandnoexcessivelubricant
DBUMPERS.Inspectforloosenessor
ONNECTIONS.Seethattheyaresecure,and
D,ANDTARPAULINS.Inspecttoseethat
and secure.
MINATOR.Mustbesecureandfullycharged.
EQUIPMENT.Present(seetoollistin
perlymountedandstowed.
RATION.Shouldidlesmoothly.Accel-
stenforany unusualnoisethatmayindicate
aks,worn,damaged,looseorinadequately
accessories.Noteanyunusualsmokefrom
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NTIVEMAINTENANCESERVICE
RMITANDFORMNo.26.Mustbe present
elystowed.
RATIONSERVICE.Theduring-operation
ediatelyvehicleisputin motion,inthenature
ERVICE.
on,listenforanysoundssuchas rattles,
hatmayindicatetrouble.Lookforsteamfrom
nypartof vehicle.Knowandwatchforodor
or,brakesorclutch,boilingantifreeze,fuel
ystem,exhaustgasorothersuchsigns of
esareused,gears shifted,orvehicleturned,
oticeanyunsatisfactoryorunusualperformance.
nstantly.Noticepromptlyabnormalinstrument
ypossibletroubleinsystemto whichtheinstru-
erationservicesconsistofobservingitems
heprocedures,followingeachitemandstop-
troubledevelops.Noticeminordeficienciesto
tearliestopportunity,usuallynextscheduled
NDBRAKES.Thefootbrakeshouldoper-
elywithoutpullingvehicletooneside,leaving
-halfinch.Whenvehicleisstopped,hand
satisfactorilywhenonareasonableincline,
ne-thirdoflevertravelavailable.
chpedalshouldhaveViinchfree pedal
todisengage.Shouldnotchatter,squeal,or slip.
N.Gearsshouldshiftsmoothly,operate
of meshduringoperation.
CONTROLS.Beonthealertfordeficiencies
chaslackofusualpower,misfiring,unusual
sofengineoverheatingorunusualexhaust
nginerespondstocontrolssatisfactorilyand
obeinproper adjustment,andnotloose.
S.Observereadingsofallinstruments
ationoffunctioningofsystemto whichthey
ouldreadnormal150Fto 190F(except
.
uldreadnormalat idle15pounds,fast
45pounds.Anyunusualdropor nooilpres-
diatelybestopped.
ation,ammetershouldindicateazeroor
scharge,negative(-)readingmayindicate
rorotherseriouselectricaltrouble.
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WHEELDRIVEMODELHAR-1)
nuetoindicateapproximateamountof
metershouldindicatevehiclespeedcor-
everse)withoutnoiseor fluctuation.
AR.Inspectforlooseness,binding,pull-
shimmy,orunusualnoise.
AR.Listenforanyunusualnoises from
onparts,thatmayindicateloosenessordamage.
ert fornoisethatwouldindicateshift-
nor curtains,looseordamagedpanels,hard-
orgunmounts.
regardedasminimumbattlemaintenance,
nderall tacticalconditionseventhoughmore
ervicesmustbeslightedor omittedaltogether.
vicesconsistofinvestigatinganydefi-
ration,inspectingitemslistedbelowaccording
gtheitems,andcorrectinganydeficiencies
rrectedshouldbereportedpromptlytochiefof
dindividual.
DWATER.Replenishasrequired.
ES:HUBS,BRAKEDRUMS,TRANSFER,
ES.Feelforoverheating.Transfercasetem-
another gearcases.
RANSFERVENTS.Wipecleanandexamine
dition.Removeandcleanifnecessary.
HAFTS.Examineforlooseness,damage,
SUSPENSION.Inspectforbrokenor
agedorlooseclips,U-bolts,eye-bolts,shackles,
ge.
KAGE.Examinesteeringcontrolmech-
ordamageorlooseness.
LANGENUTS.Allmustbe presentand
ds (maximum)pressurewhencool.
e.Removestonesfromtreadsandbetween
RAL.Lookunderhood,andundervehi-
l,water,or brakefluidleaks.
ESANDBELTS.Examineforlooseness,
nement.GeneratorbelttensionV2inchdeflec-
flection.
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NTIVEMAINTENANCESERVICE
RS.Mustbesecureandair passages
derextremelydustyorsandyconditions,in-
thercapsfrequentlyforconditionto deliver
asrequired.
DBUMPERS.Inspectforloosenessor
ONNECTIONS.Alltowingconnectionsmust
ocked.
DANDTARPAULIN.Inspectvehicleload
erlysecured,andnotdamaged.
EANDGLASS.Cleanwindshield,door,and
mirror,andlamplenses,andinspectfordamage.
RVICEANDWEEKLYSERVICE.
ngisparticularlyimportantbecauseat
shis vehicletodetectanydeficienciesthatmay
ctsthoseheispermittedto handle.Heshould
spectionpromptlytohischiefofsectionor
al.Ifthisscheduleisperformedthoroughly,
yto rollagainona moment'snotice.The
withafewexceptions,isthennecessaryonlyto
icleisinthe sameconditioninwhichitwas
eafter-operationservice.Theafter-operation
tirelyomittedevenin extremetacticalsitua-
tothe barefundamentalservicesoutlinedfor
sary.
ormingtheafter-operationservicethe
dconsideranyirregularitiesnoticedduringthe
n,during-operation,andat-haltservices.The
onsistsofinspectingortestingthefollowingunits
ganydeficiencies.Thoseitemsoftheafter-
byanasterisk(*) requireadditionalweekly
orwhichareindicatedinsub-step(b)of each
DWATER.Fillfueltanks andsparecans.
pstickandfill toproperlevelwithspecified
dobservefor contamination.Addwaterif
ATION.Testforsatisfactoryengineidle
teanddecelerateengine,notinganytendency
lnoisesor vibrationthatmayindicateworn
correctfuelmixture,orfaultyignition.Investi-
ngine-operatingcharacteristicsnotedduring
S.Beforestoppingengineinspectfollow-
mounting,properconnections,damageand
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WHEELDRIVEMODELHAR-1)
ounds,atfastidle.
60F.
chargeat idlespeed,withlightsand
efuelintank.
NDSHIELDWIPERS.Inspecthornfor
erconnections,andwiperarmsandbladesfor
andwipermotorsforsmoothoperationandfull
EARVIEWMIRROR.Cleanrearview
erglass.Examineforsecuremountingand
EFLECTORS.Observewhetherlamps
ositionsand gooutwhenswitchedOFF.In-
greflectorsfordirt ordamage;cleanifneces-
ISHERS.Inspectfortightmountings,
lves.Ifextinguisherhasbeenused,report it
ATOR.Inspectforgoodconditionand
nliness,goodcondition,securemountings
lectrolytelevelandleaks.Seethatventcaps
topof batteryandremovebattery
hcleanwater(distilledifavailable)ifneces-
alsorpostsarecorroded,cleanthoroughly
grease.Tightenterminalbolts ifloose.When
enthemcautiouslytoavoiddamagetobattery
erycarrierifcorroded.
RIESANDBELTS.
neratorandregulator,startingmotor,fan,
onnectionsormountingsandleaks.Examine
ndfandrivebelt.Generatorbelt shoulddeflect
enpulleys.Fanbelt1 inch.
essoriessuchascarburetor,generator
tor,fanandwaterpump,looseconnectionsand
arytoa deflectionofoneinchforfan,Vi inch
ALWIRING.Inspectignitionwiringfor
nlinessanddamage.Makeaninspectionofall
ingfordamageandsecurity.
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NTIVEMAINTENANCESERVICE
RSANDBREATHERCAPS.
rforcorrectlevelandexcessivedirt.When
lydirty,cleanandrefillwithfreshoil.When
yterritory,removebreathercapsat leastonce
ssemble,andcleancarburetoraircleaner,
ndcrankcaseventilatoraircleaner.Fillreser-
eanengineoil.
RS.
on,securityofmountingsandleaks.
plugbottomsideedge(notthe topcen-
d sedimenttodrainoutofthe bowl;replace
urely.
TROLS.Examineforwear,damage,or
properlubrication.
tersuchasnails, glassorstonesfromtires
pecttiresfor signsoflowpressure,abnormal
onofvalvestem.Replacemissingvalvecaps.
rewhencool.
ywornorotherwiseunserviceabletires.
DSUSPENSIONS.
ormalsag,brokenor shiftedleaves,loose
ye-bolts,U-boltsorshackles.
elyandalineasnecessary.
NKAGE.Inspectsteeringlinkageforgood
uatelylubricatedparts.Examinesteeringjoints
eaks.
SHAFTS.Removedirtandexcessgrease
ointsandinspectfor looseconnections,lubri-
emoveanyforeignmaterialwrappedaround
ANSFERVENTS.Examineallaxlehous-
presence,goodconditionandsecurity.Freeall
ons.
ERAL.Lookunderhoodandbeneath
el,oilandwater leaks.Checkaroundbrake
or lubricantleaks.Examineaxleflanges,
e,anddifferentialsforgearoilleaks.Traceall
orrector reportthem.
VELS.Checkdifferentials,transmission,
ectlubricantlevel,fromVzinch below,tofiller
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WHEELDRIVEMODELHAR-1)
DBUMPERS.Inspectforsecurityand
NNECTIONS.Inspecttowinghooksand
rdamage.Besure anytowedloadissecure
operly.
DANDTARPAULIN.Inspectcargobody
eormissingparts.Seethat loadisevenlydis-
ulinshouldbesecureandnot damaged.
ting,rim,axleflangeand springU-bolt
icleassemblyormountingnutsor screws
sisnecessary.
N.
einspectionrevealsneedfor lubrication.
beforeapplyinglubricant.Reportanymissing
ointsindicatedonvehiclelubrication
nona weeklyormileagebasis,oranypoints
enceindicateadditionallubricationisneces-
INEANDVEHICLE.
ominsidecabandbody.Removeexcessive
orof vehicleandengine.
andremovealldirtand excessgrease.If
peascleanaspossible,usingcarenot tocreate
Cleanengineand accessoriesthoroughly.
DEQUIPMENT.Checkalltoolsandequip-
gainststowageliststo besuretheyarepresent,
perlystowedandmounted.
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bricatedby ordnancemaintenance
alpartof preventivemaintenancedeter-
heserviceabilityofpartsandassemblies.
tructionsforthismaterielareconsoli-
e(fig.21). Thesespecifythepointstobe
ubrication,andthelubricanttobe used.In
eguide,othersmallmovingparts,suchas
elubricatedatfrequentintervals.
maynotbepossible tosupplyacom-
antscalledforbythe LubricationGuidetomeet
willbenecessarytomakethebestuse ofthose
ctionbytheofficerconcerned,inconsultation
epersonnel.
ollowingnotesapplytotheLubrica-
cesinthe guideitselfareto thesubparagraph
ondingnumber.
eapplyinglubricant.Lubricateuntilnew
ebearing,unlessotherwisespecified.CAU-
ointsafterwashingvehicle.
ndicatedarefornormalservice.Forex-
,heat,water,sand,mud,snow,roughroads,
byJ/or V2,ormoreifconditionswarrant.
checkengineaircleanerlevelandrefill
withusedcrankcaseoilorOIL,engine,crank-
iles,dailyunderextremedustconditions,re-
parts.Daily,checklevelandrefill oilreservoir
eaircleanertooil levelstampedoninsideof
caseoilorOIL,engine,crankcasegrade.Every
xtremedustconditions,removecleanerand
0miles,removehydrovaccylinderaircleaner,
rovaccylinder,washcurledhairandreoilwith
engine,crankcasegrade.
cleanersisessentialtoprolongedenginelife.
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WHEELDRIVEMODELHAR-1)
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WHEELDRIVEMODELHAR-1)
ywhenengineishot.Refillto FULL
afew minutesandrecheckoillevel.Besure
iscirculating.SeeTable.
0miles,drainfilterthroughdrain plug.
oftenif filterbecomesclogged,drainfilter,
nd renewfilterelement.Afterrenewingele-
ULLmarkongage.Runengineafew minutes,
o FULLmark.
checklevelwithtruckonlevelgroundand,
ttowithinVzinch ofpluglevelwhencold,orto
flushand refillatintervalsindicatedon
nimmediatelyafteroperation.Keepvents
about V2capacitywithOIL,engineSAE10.
ncasesslowlyforseveralminutesandredrain.
fillcasesto correctlevelwithlubricantspeci-
ALJOINT.Every1,000miles,apply
,seasonalgrade,sparinglythroughfittinglo-
llmember.Every6,000miles,repackfront
member.Thisoperationrequires theremoval
e skeins.Cleanoutalloldgreasefrom theball
drepackwith11/2Ib ofGREASE,generalpur-
DSOCKET.Every1,000miles,lubricate
ndlowersocketbearingsthroughfittingslo-
eachsocketwithGREASE,generalpurpose,
.
ntandrear).Tocleanandpackbearings
movedfromthehub.Followthe procedure
hubandwashin SOLVENT,dry-clean-
ntisremovedfrombothinside andoutside
y andwashinsideofhuband spindle
ng.
oughlydry,packraceswithGREASE,
reassembleinhub. Tosatisfactorilypacka
kneadlubricantbyhandintospacebetweenthe
nsideofhub andspindlewithathin coatof
Donot fillhub.Thelubricantpackedinbear-
vide lubricationuntilthenextserviceperiod.
kageoflubricantinto thebrakedrum.
ustbearingsaccordingtoinstructionsin
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EMBLED
00to1,000miles,or moreoftenifnec-
ratingconditions,removepluganddrainsedi-
emovefilterbowlandwashelement.
ER.Every6,000miles,removepluginfront
omatmosphericconnectionofcenterplate,
2oz.of OIL,hydraulic,througheachplughole.
JOINTS.ApplyGREASE,generalpur-
niversaljointuntilit overflowsatreliefvalve
antisforcedfromendof slipjoint.
2,000miles,wipedistributorbreakercam
ralpurpose,seasonalgrade,andlubricate
mshaftwickunderrotorwith1 or2dropsof
ade.
ry1,000miles,lubricateacceleratorcon-
handle,centerdifferentiallocklinkage,foot
-offshiftlinkage,emergencybrakelinkage,
hookwithOIL,engine,crankcasegrade.
Every1,000miles,applyFLUID,brake,
erlinkbushings.CAUTION:Donotuseoil.
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WHEELDRIVEMODELHAR-1)
oLUBRICATIONSERVICE.Clutchpilot
s.
EDAND/ORLUBRICATEDBYORDNANCE
EL.Speedometercable(par.20).
ugh27showl ocalizedviewsofspecific
EDAND/ORLUBRICATEDBY
EPERSONNEL.
ery6,000mileslubricatecable.Follow
ftatspeedometerhead.
onfulofGREASE,generalpurposeNo.0,
orethroughthegreaseandbackinto thecasing.
thendsandreconnecttheconduits.
cumstancesshouldthecasingbefilled
RDS
structionsarecloselyfollowed,proper
actoryresultsarenotobtained,areport willbe
cerresponsibleforthemaintenanceofthe
cordoflubricationservicingwillbekept.
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n-
e.
ywhenen-
markon
nutesand
N:Besure
entpanelin-
ngine.
efromun-
owsateach
ngandShafts.Lu-
erchassis.
te
ease
salJoints.Lubricatefrom
wsthroughsafetyvalve.
cation
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WHEELDRIVEMODELHAR-1)
erShaft
e,fromun-
through
rShaftUni-
omunder
saround
romunder
atball
n-
cket.Four
t topand
nderchassis.
Lubricate
easeshows
tedailyin
cation
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er.Lubricate
egrease
the engine
every1000
llat 6000
case.
CAP
wickbe-
reedrops.
es.
bricate
Grease
r.Inspectfluid
rto1/2inch be-
cation
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WHEELDRIVEMODELHAR-1)
every1000
llat 6000
ndRear)
rain,
les.Clean
g.
Allplugslo-
.Checkweekly
ush,andrefill
oint.Re-
ointand
iles.
pectfluidlevel,
valsof6000
st.Fillreser-
ghole.
kwheel
.
atefromun-
sthroughvent.
miles.
cation
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REREFILLING
ckAbsorbers
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WHEELDRIVEMODELHAR-1)
SERVATION
mustbekeptof eachmotorvehicleissued
ent.ForthispurposetheOrdnanceMotorBook
erallycalled"LogBook,"isissuedwitheach
anyitatalltimes.This bookfurnishesacom-
fromwhichvaluableinformationconcerning
cecosts,etc.,areobtained,andorganizationcom-
orrectentriesaremade.This bookwillhabitu-
overtopreventitsbeinginjured orsoiled.
ordofassignmentmustbedestroyedprior
e.Allotherr eferenceswhichmaybeposted
eorganizationmustalso bedeleted.
hesourcesofgreatestwearto avehicle.
reallowedto accumulate,particleswillsoon
surfaces,causingunnecessarywear,andifthe
willsooncauseseriousdifficulty.Whenre-
yotherunits, inmakingrepairsandreplace-
ofinspectionworkingjointsorbearingsurfaces
andgritthat mightfinditswayto theexposed
fullyremoved.Thetoolsmustbe clean,and
toeliminatethe possibilitiesofbrushingdirt
ththesleeveorotherpart oftheclothing.To
hardenedgrit,or roadoil,useSOLVENT,
rags(notwaste)ora brush.Thevehicleisso
tyofinterferingwith itsproperoperationby
aningwaterisverysmall.However,careshould
mthe powerunit,asitmight interferewith
etion.
rsteam-cleaningdevices,particularat-
tothe properprotectionofallelectricalequip-
chassis,andbodies ofthevehiclesbeing
omthe cleaningnozzlemustnotbeapplied
ssories.Steamormoistureforcedintotheequip-
shortcircuitsand corrosionoftheinternalparts.
erators,starters,distributors,etc.,shouldbe
ry-cleaning.Theseelectricalaccessories
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SERVATION
priorto cleaningthevehiclewithanytypeof
apor-cleaningmachine,orhaveadequatepro-
detheentranceofmoistureduringthe opera-
omecloggedshouldbeopenedwitha
neverbeused forthispurpose,assplinters
permanentlyclogthepassages.Particularcare
d decontaminatevehiclesthathavebeen
esectionIX, "MaterielAffectedbyChemi-
ration.)
he vehicleshouldbekeptpainted
olorscheme.Exposedmetalpartsthathave
illbekeptin awell-paintedcondition;how-
eunpaintedwhenthematerielwasreceived
on.
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WHEELDRIVEMODELHAR-1)
ONTHEVEHICLE
nincludestools andequipmentforgeneral
hevehicle;anOrdnanceMotorBooktorecord
ualpertinenttovehicleoperation,anda parts
houldnotbe usedforpurposesotherthan
use shouldbeplacedintheirproper location
y
atureList1
earereviewedin StandardNomenclature
asfollows:
hillips..1
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ONTHEVEHICLE
1
1
gle,
.x7/ie-in...1
x'%2-in...1
.x* Vie-in...1
.x2%2-in...1
.x7/8-m..1
brg.nut)1
e)1
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WHEELDRIVEMODELHAR-1)
HEMICALS
tomotivemateriel31
RES.
stantdangerofgasattack,unpainted
coatedwithengineoil.Instrumentsarein-
be protectedbyoilfromchemicalcloudsor
betakenthatthe oildoesnottouchleather
notinuse willbeprotectedwithcoversas
acticallynoprotectionagainstmustard
oilcloth,forexample,willbe penetrated
ger theperiodduringwhichtheyareexposed,
earingthese articles.Rubberbootswornin
hmustardgasmayofferagrave dangertomen
ysafterthebombardment.Impermeable
tionmorethananhour, butshouldnotbeworn
sof materielthathavebeenexposedto
ndlewisitemustbe cleanedassoonaspossible
ng,orALCOHOL,denatured,andwipeddry.
oatedwithOIL,engine.
chemicals(mustard,lewisite,etc.)from
psshouldbetaken:
ES.
onsacompletesuitofimpermeable
maskwill beworn.Immediatelyafterremoval
hwithsoapandwater(preferablyhot)must
havecomeincontactwithmustard,ifevena
gets intotheeye,orif thevaporofmustard
perativethatcompletefirst-aidmeasuresbe
utesafterexposure.First-aidinstructionsare
21-40.
mustardgasmustbe decontaminated.If
hasbeenexposedtovaporonly,it maybede-
intheopenair,preferablyin sunlight,forsev-
eanedbysteamingfortwohours.If theim-
eencontaminatedwithliquidmustard,steam-
illberequired.Variouskindsof steamingde-
ommaterialsavailableinthefield.
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HEMICALS
materielofdirtthroughthe useofsticks,
beburnedor buriedimmediatelyafterthis
terieliscoatedwithgreaseor heavyoil,
eremovedbeforedecontaminationisbegun;
otheravailablesolventsforoil shouldbe
endsof sticks.
ntedsurfacesofthematerielwithbleach-
gonepart AGENT,decontaminating(chlor-
water.Thissolutionshouldbeswabbedover
oughlywithwater,thendryand oilallsur-
tsand instrumentsexposedtomustard
contaminatedwithAGENT,decontaminating,
partsolidtofifteenpartssolvent(ACETY-
thisis notavailable,usewarmwater
onmustnotbeused,becauseofits corrosive
ceslightlywithOIL,engine.
econtaminating(chlorideoflime),is
ybetemporarilycleanedwithplentyofhot
lyinginjointsorin leatherorcanvaswebbing
cedure,andwillremainaconstantsourceof
anbe properlydecontaminated.Allmustard
ismannerlies unchangedontheground,ne-
minatedareabeplainlymarkedwithwarning
t.
minatingofmaterielcontaminatedwith
ompoundsintothesoil,poisoningmanywater
bothmenandanimals.
bingthathasbeen contaminatedshould
thbleachingsolution.Intheeventthis treat-
be necessarytoburnorburysuchmateriel.
ndecontaminationiscontainedinFM21-
1941(Decontamination).
SFORAUTOMOTIVEMATERIEL.
ensubjectedtogasattackwiththe engine
ouldbe servicedbyremovingtheoil,flushing
ng,andrefillingwiththe propergradeofoil.
dbecleanedin thesamemannerasout-
hionswillbediscarded.
entsthoroughlywithbleachingsolution
neinthe field.Operatorsshouldconstantlybe
under conditionsofhightemperatures,for
ustardorlewisite.
cleswillbedecontaminatedwithbleach-
aybenecessaryafterthisoperation.
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WHEELDRIVEMODELHAR-1)
ENANCEINSTRUCTIONS
N
e33
ceandrepairbythe crewandotherunits
minedbytheavailabilityofsuitabletools,avail-
capabilitiesofthemechanics,timeavailable,
Alloftheseare variableandnoexactsystem
ribed.
TENANCE.
maintenancedutiesforwhichtoolsand
ortheusing armpersonnel.Otherreplace-
responsibilityofordnancemaintenanceper-
edbyusing armpersonnelwhencircum-
discretionofthecommanderconcerned.Eche-
thislist ofmaintenanceallocationsaredefined
ts,battalions,
andseparate
ncecompanies,
enancecom-
almaintenance
nceshops.
ancecompanies,
ops.
s,ordnance
ufacturers'
ning,lubricat-
ts,and mak-
ofsubassem-
ntrols.
art,subassem-
ehiclesand
reconditioned
yorassembly,
e.
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N
grepairsto,orreplace-
mentofthe part,subassemblyorassem-
thatcan beaccomplishedwithout
emblingthesubassem-
snot require
,machining,
ancing.
pletelyreconditioning
ndreplacingin serviceablecondition
unserviceablepart,subassemblyor
hicle,includingweld-
tting,alining,
ndtesting.
tenancedutiesforwhichtoolsand parts
eusingarms personnel.
LINKAGE
ge,assemblyreplace.X
ge,assemblyrepair..X
ge,assemblyrebuild.EX
eplaceEX
eplace* X
pairX
buildEX
adjust)andreplace... X
ervice(adjust)X
replaceX
ceX
rX
edwillnormallybeperformedinthe
eechelonsasindicatedby"E"maybe
ectiveechelonsinemergenciesonly.
horizedtoremoveandreinstallengine and
transferunit,controlleddifferentialassembly
yan asterisk.However,whenitisnecessary
byan asteriskwithaneworrebuilt part,
mbly,theassemblymarkedbyanasterisk
e vehiclebythesecondechelonuntil
romahigherechelon.
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WHEELDRIVEMODELHAR-1)
djust)andreplaceX
ne)X
service(adjust)X
erandcasterservice
erandcasteraline....EX
X
X
adjust)andreplace...X
ervice(adjust)X
replaceX
djust)andreplaceX
ne)X
EX
eplaceX
epairEX
vice(adjust)andreplaceX
airX
lyreplaceX
lyrepairX
lyrebuildX
c)replaceX
c)repair'X
c)rebuildX
...X
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N
(adjust)andreplace....X
eline)X
laceX
airX
rrepairX
X
eX
mblyreplaceX
mblyrepairEX
mblyrebuildX
emblyreplaceX
emblyrepairX
emblyrebuildEX
laceX
airX
yreplace* X
repairX
rebuildEX
laceX
airX
placeX
adjust)andreplace..E X
reline)X
EX
laceX
airX
X.
service(adjust)X
(flush)X
eplaceX
aceX
irX
ildEX
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WHEELDRIVEMODELHAR-1)
eorreplaceX
X
y(generatorcontrol)
y(generatorcontrol)
X
y(generatorcontrol)
X
X
dstowagereplace....X
dstowagerepairX
aceX
airX
uildX
st)andreplaceX
ngineModel6BZ)
(inserts)replaceEEX
erts)replaceEEX
dreplaceX
condition)EX
rvice(adjust)andreplaceX
pairX
buildX
an)andreplaceX
eplaceX
laceX
airX
ondition)EX
placeX
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N
pairX
buildX
ce* X
X
dEX
ceX
dtion)EX
dmanifoldreplace...X
aceX
placeX
pairX
buildX
vice(adjust)andreplaceX
uildEX
X
econdition)EX
aceX
irEX
ceandrepairX
X
ce(clean)andreplace
ceorrepairX
eEEX
repairX
rreplaceX
placeX
pairEX
buildEX
aceorrepairX
uildX
replaceX
repairX
rebuildX
EEX
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WHEELDRIVEMODELHAR-1)
placeX
adjust)X
replaceX
tetrachlorideCCIO
X
tetrachlorideCC14)
tetrachlorideCCIO
replaceX
repairX
X
EX
n)andreplaceX
replaceX
repairEX
ES
eplaceX
epairX
ebuildEX
eX
X
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ON
rsaljoint8(all)replaceX
er8aljoints(all)repairX
er8aljoint8(all)rebuildEX
replaceBX
repair,X
rebuild'.,EX
place,X
pairX
bber)replaceX
ce...,,X
r,,,X
ldEX
ce.,,X
placeorrepairX
replace* X
repair,X
rebuildEX
mblyserviceX
blyrebuild(with
XE
eX
,.EX
service(adjust)and
repair(reline).,'X
placeX
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WHEELDRIVEMODELHAR-1)
replaceX
repairX
laceX
airX
replaceX
repairX
rebuildEX
X
X
EX
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IVEMAINTENANCESERVICE
vemaintenanceservice34
EVENTIVEMAINTENANCE
ntenanceinspectionsandservicesarea
functionoftheusing arm,andaretherespon-
operatingorganizations.
uenciesofthepreventivemaintenance
econsideredaminimumrequirementfornor-
Underunusualoperatingconditionsitmaybe
ainmaintenanceservicesmorefrequently.
TCIPATION.Thedriversshouldaccompany
emechanicswhileperiodicsecond-echelonpre-
vicesareperformed.Ordinarilythedrivershould
heduledpreventivemaintenanceserviceina
n;thatis,itshouldbedry andnotcakedwith
extentthatinspectionandservicingwillbe
ever,thevehicleshouldnotbewashedorwiped
ertaintypesofdefects,suchascracks,leaksand
sembliesaremoreevidentif thesurfacesare
n thosecontainedinthegeneralproce-
cificprocedureinsubparagraph(5)arere-
ormanceofapreventivemaintenanceservice
ency,themotorsergeantor thevehicleoper-
nsulted.
S.Thesegeneralproceduresarebasicin-
ollowedwhenperformingtheserviceson the
pecificproceduresofparagraph(5).NOTE:
nnelmustbesothoroughlytrainedin thesepro-
ythemautomatically.
edsubassembliesareinstalledto correct
betakentoseethattheyare cleanandproperly
ricantretainerseals,a coatingofthe
overthesealingsurfaceof thelipofthe seal.
therseal,itshould besoakedinSAE10 engine
ratleast 30minutes.Thentheleatherlip
ybyhandbeforeinstallingthe seal.Thelip
arred.
ofeachitemappliesalso toanysupport-
,andusuallyincludesachecktosee whether
on,correctlyassembled,secure,orexcessively
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WHEELDRIVEMODELHAR-1)
stbethoroughlytrainedinthefollowingex-
onditionis usuallyanexternalvisualin-
ethertheuniti8damagedbeyondsafeor satis-
oodcondition,isexplainedfurtherby8uch
tbentor twisted,notchafedorburned,not
eorfrayed,notdentedor collapsed,nottorn
toseethatit i8correctlyas8embledisusw-
ectiontodeterminewhetherit isinits normal
vehicle,
etermineifit issecureisusuallyan ex-
hand-feel,orapry-barcheckforloosenessin
nshouldincludeanybrackets,andall lock
gwires,orcotterpinsusedto securethetight-
hisafrequentlyusedterm,willbe under-
-toorbeyondsatisfactorylimits,andlikelyto
acedbeforethenextscheduledinspection.
eareindicatedbyaddeditemnumbers
columnorboth,andindicatethat thepartor
tainmandatoryservice8,Forexample,anitem
umnsoppositeaTIGHTENprocedure,means
ofthe objectmu8tbeperformed.Thespecial
ryadju8tmentsinaccordancewiththe
,specialbulletins,o'rothercurrentdirectives.
vehicletoremoveexcesslubricant,dirt,
cleaning.Afterthepartsare cleaned,rinse
themwell,Takecaretokeeptheparts clean
keepcleaningfluidawayfromrubberor other
ge.Cleantheprotectivegreasecoatingfrom
usuallynot agoodlubricant.Cleanhydraulic
nbrakefluid.Do notusesolventcleaning
applieseithertolubricationoperations
on thevehiclelubricationchart,orto-items
rts butwhichshouldbeperformedinconnec-
operationsifpartshaveto bedisassembled
allyconsistsof performingspecialoper-
ngbatterywater,brakefluid,andshockabsorber
unit8with oil,andchangingtheoilfilter
perationsshouldbeperformedwithsuf-
ceonthewrenchhandle)totightenthe unit
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IVEMAINTENANCESERVICE
nicalpractice.Usetorque-indicatingwrench
ertighten,asthismaystrip threadsorcause
alwaysbeunderstoodtoincludethecorrect
s,locknuts,andcotterpinsprovidedto secure
itdifficulttoperformthe completepre-
viceatonetime,itcansometime8behandledin
pletealloperationswithintheweekifpossible.
est periods,andinbivouacarea8mustbe
urethat maintenanceoperationsarecompleted.
alsituation,itemswithSpecialServicesin the
rstconsideration.
eventiveMaintenanceProceduresthatfol-
eoutlinedon WDAGOFormNo.461,which
nceServiceWorkSheetforWheeledand
inproceduresthatdonot applytothisvehicle
lsequenceingeneralisfollowed,butin some
conservationofthemechanic'stimeandeffort.
ES.Theseprocedure8forperformingeach
onthly)and6000miles(six-month)preven-
onsandservicesaredescribedonthefollowing
arthas twocolumnsatitsleftedge correspond-
he1000miles service,respectively.Veryoften
cularproceduredoesnotapplyto both8erv-
whichproceduretofollow,lookdownthe col-
servicedue,andwhereveranitemnumber
ectionand/orserviceindicatedoppositethe
etacticalsituationdoesnotpermit afullroadtest,
mswhichrequirelittleor nomovementofthevehicle.
ble,itshouldbefor preferably5andnotover
ce.Performthebefore-operationserviceas
,asa checktodeterminewhetherthevehicle
ontosafelymaketheroadtest.
.
angeis 40to45poundswith engineat
gageindicateszeroorexcessivelylow
ediatelyandinvestigate.'
dshowhighchargeforashorttime after
slightlyabovezerowithalllights andelec-
doff.Whenbatteryislow,ahighercharge
longer periodoftime.
ermustoperatewithoutexcessivefluctua-
exceed190F.Dangertemperatureisat
chon,see thatfuelgageregistersapprox-
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WHEELDRIVEMODELHAR-1)
dshieldWipers.Whentacticalsituation
ean,andsecurerear-visionmirrors.Operate
n,adjustarmsandreplacebladesiffaulty.
.Makefirst brakecheckfromlowspeed
ontinuetestsas otherstopsaremade.
muststopthevehiclesafelyata fast
stance;operatewithgoodeffectiveness;
deratebutnot"hard"or "spongy"feel.Front
ehicletooneside.Listenforany objection-
rvepedaltravelat theendofthestop should
rakeisset,it mustholdvehicleeffectively
ravelshould bereserve.
ng,dragging,chatterornoisethatmightindi-
efectiveclutchparts,ordryreleasebearing.
velofJ to1%inchesbeforemeetingresist-
speedin highgeardepressacceleratorfully,
slightly,andobserveif clutchappearstoslip.
sfer.Withvehiclein motion,shiftthrough
ansmissionandseethatshiftermechanism
ashingorjumpingoutofgear, thatthelocking
eratesfreely,whetherthereareanyunusual
ateloosemountings,andwhetherthereis
icleinmotionmovesteeringwheelfullyin
vewhetherthereisany indicationoflooseness
ndencytowander,shimmy,orpulltoone
edatnormal speeds.Steeringcolumnand
ood conditionandsecure.
noteanytendencyoftheengineto stall
gears.Withthevehiclestopped,observe
oothlyatnormalidling speed.
oise.Observeifenginehas normal
erandoperatingcharacteristicsineachspeed
gearrangefromfirst tohigh.Makeasimilar
omlowspeed withwide-openthrottle.During
usualenginenoisesuchas excessive"ping,"
mingortoolow octanefuel.Listenforother
damaged,excessivelywornorinadequately
accessoriesorloosedrivebelts.
hicleinsecondgear,slowlydepressthe
ndbyobservingspeedometerreading,seeif
notexceed,thegovernedspeedspecifiedon
ert foranyunusualnoisethatmayindicate
ssivewearinbody,wheels,suspensionassem-
quipment.
ationHydrovac.Testbrakestolearnwhether
sinapplication.Aquicktestis tostopvehicle,
tenfor airmovementinthehydrovacunit
epedalis beingoperated.
ercompletingroadtestrun.)
elallbrakedrums andwheelhubs
mperatures.Anoverheatedbrakedrumor
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IVEMAINTENANCESERVICE
of adraggingbrake,ora defective,dry,or
elbearing;anabnormallycoolbrakedrumis
tivebrake.
Transfer.Cautiouslyfeelaxlediffer-
mission,andtransfercaseforoverheating.If
lyhot,forthe distancetraveled,anabnormal
cated.
nginecompartmentandundervehicleforindica-
brake fluidleaks.Tracethemtotheir
ortthem.
eaks.Examinedrivingaxles,transmissionand
andleaks.NOTE:Thesaferange levelis
fillerholewhenhot,to J inchbelowwhen
bricationrecordsindicateachangeofoilin
ndrefilltransmission,transfercase,andfront
drefill withspecifiedlubricant.
NS
ly)
the enginerunning:
ories.Accelerateanddecelerateengine
orunusualnoisethat mightindicatedamaged,
engineparts,drivebeltsor accessories.Locate
nusualenginenoise heardduringroadtest.
ropellerShaftsandU-Joints,Axles
transmissioninintermediategear,operate
oderatespeedbyuseof thehandthrottle,
oisethatmightindicatedamaged,looseor
s.Alsoobserveallpropellershaftsfor vibra-
onsin theotherunitswhichmayindicate
ocate,correctorreportanynoisenotedduring
ES
asket.Checkforcracksor indicationsofoil,
ksaroundstuds,capscrews,andgaskets.
shouldnotordinarilybetightenedunless
ofloosenessor leaks.
ustvalvestemclearanceifvalvesarenoisy.
nchand exhaust0.014inchto0.016inch
kingcovergasketmustbereplaced.
ngs,andlocksarein goodcondition,correctly
arancesintake0.010inchto0.012inch
0.016inch(room temperature),makingsure
clearancesarelastcheckedduringadjustment.
nd examineinsulatorstoseeiftheyare cracked.
nch.Testcompressionbeforereinstallingplugs.
stcompression.Compressionof85poundsat
otvaryingmorethan10poundsbetween
npressuremaybeconsiderednormal.
d-downs,Carrier,SpecificGravity).Ex-
dryexterior,cables,andterminals.Grease
ownbolts.Testspecificgravity,normal1.275
rless. Bringelectrolytelevelto%inch
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WHEELDRIVEMODELHAR-1)
hargetestofthe battery.Reportifdiffer-
ellsismore than30percent.
crankcase,valvecovers,timinggearcover,
aks,and checkoillevel.
onlubricationrecordsindicateanoilchange
drefillto properlevelwithspecifiedoil.Do
itemnumber24iscompleted.
pectfor leakage,looseconnectionsor
Cleanoilfiltercase,installnew filtercart-
ngs,Hose,CapandGasket).Observefor
kage.Checkcoolantforcontamination.
sused,checkprotectivevaluefortemper-
thedirt,insectsandtrashfromthe exterior
ngsandhose.
hroud.Observewaterpumpforleaks.
loosebearings.Inspectfan bladesandshroud
Switch.Examinemountingsandwiring
ditionandsecurity.
ncoversandinspecttoseethatcommutators
onditionandnotexcessivelyworn;thatbrushes
ush-connectingwiresaresecureand not
ormustbecleanedwith00flintpaperaccord-
manual,Par.82b.Blowoutthe dustwith
tartingmotormountingnutssecurely.
Checkfanand generatordrivebeltsfor
pulleysandhubsfor goodconditionand
rdrive.beltstoJ -inchdeflectionandfanbelt
tributorand externalattachmentsandex-
correctassembly,securityandserviceability.
drotor arm,corrosionofterminalsand
oftheouterendsofconductorstrap.Breaker
ndition,alined,andadjustedto0.020-inchgap.
rexcessivelyworn.
emblyisexcessivelyworn,dirty,remove
t,drywithcompressedair,lubricateasspeci-
positionfor timing.Whencleaningremove
p.Cleanwhileremovedandreinstallonly
scleanedanddried.Lubricatecamsurface,
wickandcamshaftwithlightoil.Adjust
nch.
ness.Testcentrifugaladvancetoseewhether
edbyfingerforcethroughnormal rangeof
entrifugaladvancemechanism,andreturns
dingorsticking.
coil forgoodcondition,cleanlinessand
geignitionwiring,includingshieldingor
in goodconditionandsecurelyfastenedat
terminals.Seethatinsulationand connections
oltagewiringin theenginecompartmentin
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IVEMAINTENANCESERVICE
takeandexhaustmanifoldforgood condition,
ketsforleaks.
arburetoraircleanerfor goodcondition,security,
ditionofthecleaningelement,bafflesandseals.
ervoirtocorrectlevelwith specifiedoil.
entilators.Inspecttosee thattheyarein
assembled,secure,andthatventilatortubes
ments,cleanbothelementandbodyinsolvent,
oil. Cleanandserviceoilbathcylinder-head
eras foritem34.
Throttle,Linkage,andGovernor).Inspect
dcondition,correctlyassembled,secure,that
ndthatgovernoris properlysealed.
s.Inspectfuelfilter,sedimentbowl,fuellines
ttheyare ingoodcondition,secure,andnot
wlandelement,andcleaninsolvent.Include
arburetorfuelline connectionorfuelpump.
ets.Afterassembling,recheckforleaks.
ueland vacuumpumpforgoodcondition,se-
stgageandwiththe engineidling,note
eandvacuumaresatisfactory.
observingwhethergeneralactionof starting
cularlywhetheritengagesand'disengages
enoiseandhasadequatecrankingspeed,and
dily.
ecompartmentandunderthevehicleforengine
aterleaks.
ckandset accordingtoinstructionsinpar.85
uumTest.Connectavacuumgagetointake
tsnormalidle speedbymeansofthrottle
eidle-mixtureadjustingneedleuntilvacuum
reading.Ifthislatteradjustmentchangesidle
dlespeedandmixtureuntilboth aresatis-
erveifit isingoodconditionandif connections
.Connectlow-voltagecircuittesterandtest
regulatorandcut-outforpropergenerator
nstructionswhichaccompanythetest
ACHMENTS
pectasfollows:
pectvalvestemsforgoodcondition,cor-
alvecaps arepresentandsecure.
.Inspecttiresforcuts,bruises,breaks,
ead wear,watchingforanysignofflatspots,
ndone-sidedwear.Anymechanicaldeficiencies
houldbedeterminedandcorrectedorreported.
,nailsandstones.Thewheelpositionsoftires
bechangedfronttirestorear wheelpositions
non-directionaltiresshouldnotbein-
ltiresshould bemountedsothat"V"of
kingfromfrontofvehicle.
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WHEELDRIVEMODELHAR-1)
operlyinflated,inspectformatching
mference,%-inchvariationpermissible.
tsparetirecarriersfor goodcondition
rims andtheirlockringsor flangesare
re.Tightensecurely.
tandserviceasfollows:
emovedirtandgrease andinspecttosee
on,securelymounted,andnotexcessively
rveiftheyarein goodcondition,securely
Tightenthebrakesupportanddrum mount-
inings,Links,Guides,andAnchors).In-
s:
ghinspectionholesor openingsinbrake
whethertheyaresowornthat rivetheadsmay
000milesof operation.Ifliningsarenotvisible,
drum forinspectionofbrakeliningsbymotor
ethertheyshouldbereplaced.Iflinings onthis
ced,removeallwheelsandservicetheir brakes
an,lubricateandadjustall removedbearings,
lar inspectionofbrakeliningsshouldbe
ybeenoperatedindeep water,mud,loose
veenteredbrakedrum.
ingsarein goodcondition,secure,ingood
ms,freeoflubricantorbrakefluid,and not
seethatbrakeshoesarein goodcondition;
edbyanchorbolts,connectinglinks,guides
eturnedagainsttheir camorstopsbythe
ustfromtheliningswith awirebrush,clean
Aftercompletion,adjustbrakeshoesbyminor
ningshaveproperclearancesfrombrakedrums.
eninstalled,adjustshoesby themajor
gs,Seals,DriveFlanges,andNuts).Inspect
follows:
twheelsare ingoodcondition;revolve
aveexcessiverun-out.
utremovingrearwheels,examinefor
wheelbearingoradjustment.Revolverear
tionsofdry ordamagedwheelbearings.
roundbrakesupportsanddrums forlubricant
ecktoseethat theyareingoodcondi-
0-mileservice,ifvehiclehasrecentlybeen
ichmayhaveenteredwheelbearings,remove
bearinglubricantappearsto becontaminated.
gsoftheone removedwheelbeforeitisre-
ectionsofwheelbearinglubricantaremade,
gsto seewhethertheyareexcessivelyworn.
hebearings andoilseals.Cleanthoroughlyand
ces,andcagesto seethattheyarein good
psaresecure.Alsoexamineto seeifthe
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IVEMAINTENANCESERVICE
whichthebearingsareassembledareingood
arereinstalled,lubricatethewheelbearings
t,thenbackoff%turn.
Supports,andCylinders).Inspectand
ovedirtandgreaseandexaminedrums
dition,securemounting,excessivewearor
eforgoodconditionandsecuremounting
kesupportanddrum mountingboltsse-
plateforalinementanddistortion.
nings.Links,Guides,andAnchors).In-
s:
hinspectionholesoropeningsin brakedrums
they aresowornthatrivet headsmayscore
esof operation.Ifliningsonthiswheel brake
eallwheelsandservicetheirbrakessimilarly,
teandadjust allremovedbearings,andto
pectionofthebrakeli ningsshouldbemade
noperatedindeep water,mud,loosesand,or
edbrakedrum.
ngsareingood condition,tightlyscrewedto
ngcontactwiththedrums,freeof lubricant
cessivelyworn.Alsotoseethatbrakeshoes
erlysecuredandguidedby anchorbolts,
ndsprings;andproperlyreturnedagainstcams
gs.Cleanall dustfromliningswitha wire
pressedair.
sandinspectionsofall followingitemstoand
pleted,adjustbrakeshoesbyminoradjust-
veproperclearancesfrombrakedrums.
eeninstalled,adjustshoesby majoradjust-
oints,Bearings,Seals,andBoots).Inspect
mineknucklehousingsandsteeringarmsfor
whetheroutsidesealisingoodconditionand
fthelubricantfromeachknuckle;inspectit
ndcleanthe steeringknuckleandaxleU-joint
whetherdisassembledknuckleandjointparts
e knucklepivotbearingsanddrivejoints
eandadjustthepivotbearing.Whenreassem-
nstallanyrequirednewlubricantretainer
Leaves,U-Bolts,Hangers,andShackles).
re ingoodcondition,correctlyassembled,and
gshaveexcessivesag.TightenU-boltssecurely.
od,Drag Link,Seals,PitmanArms,Gear,
minetoseethattheseitemsare ingood
ecurelyassembledandmounted,andwhether
ntisat theproperlevelandnot leaking.Note
actoryadjustment.
aftnut andsteeringgearcaseassemblyand
ecurely.CAUTION:Loosenthesteering
teningthesteeringcasemountingnuts,soas
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WHEELDRIVEMODELHAR-1)
ersandLinks.Examineshockabsorberbodies
n,securityandfluid leaks.
orberbodieswithspecifiedfluid.Workthearm
.Repeatthis operationuntilallairis expelled
sconnectthelinkandchecktoseethat the
actingshockabsorbershouldhaveresistance
gs,Seals,Flange,AxleEndPlay,and
theseitemsasfollows:
twheelsare ingoodcondition,revolve
aveexcessiverun-out.
utremovingfrontwheels,examinefor
wheelbearingoradjustment.Revolvefront
tionsofdry ordamagedwheelbearings.In-
oundbrakesupportsanddrums forlubricant
ecktoseethat theyareingoodcondition
e,ifvehiclehas recentlybeenoperatedin
veenteredwheelbearings,removeonewheel
ricantappearstobe contaminated.Cleanand
neremovedwheelbeforeit isreinstalled.
wheelbearinglubricantaremade,alsoinspect
hethertheyareexcessivelyworn.
hebearingsandoil seals.Cleanthoroughlyand
ces,andcagesto seethattheyarein good
psaresecure.Alsoexamineto seeifthe
whichthebearingsareassembledareingood
led,lubricatethewheelbearingsandadjust
koff%turn.
d Play,Seal,Vent,andAlinement).If
t ofline,measurethedistancefromfront
faxlespring padoneachside.Thisdistance
on eachside.Inspecttoseethat theaxle
onandnotleaking:Examinepinionshaftfor
alforleaks.Cleanthe axlehousingvent
(Joints andAlinement,SealsandFlanges).
,correctandsecureassemblyandmountings;
entandexcessivewear;slipjointshould be
,andwelllubricated;andsealsofU-joints
akexcessively.
semblyandcompanionflangeboltssecurely.
specttosee thattheyarein goodcondition
dconnected.Ifthemountingboltsareloose,
movealloilorgrease fromrubbermountings.
s hardorcracked.
tandPawl,Linkage,DrumandLining).
rakeratchetand pawlandlinkagearein
e;thatbrakedrumis notscoredoroily;and
soaked,norwornthin.
ebetweenthebrakedrumandliningto 0.060inch.
avel,Linkage,andReturnSpring).Ex-
alfreetravelissatisfactory,1to Ij^inch,that
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IVEMAINTENANCESERVICE
tedandthat clutchoperatinglinkageisin
ndnotexcessivelyworn.Seethatreturnspring
ension.
eetravel"accordingtospecifications,1to
epedaltravelat theendofthestop shouldbe
hebrakelinkagefordamageandexcessive
gis intactandhassufficienttension.
er(Vent,FluidLevel,Leaks,andSwitch).
re ingoodconditionandsecure;thatthe
ndwhetherthere areanyindicationsoffluid
derreservoirtothe correctlevel.Allow
expansion.Cleanvent.
rovac(Linkage,AirCleanerHoge,and
seethattheyare ingoodcondition,securely
andthattheoperatingandcontrollinkage
rbrakefluid isleakingfromtheslavecylinder.
erelement.
nsertafewdropsof lightoilintopower
ting,Seals,PowerTake-Off,andLinkage).
forgoodcondition,oilleaksfromsealsand
nkageisin goodcondition,properlycon-
onand powertake-offmountingandexternal
rewssecurely.
,Linkage,SealsandVent).Inspecttransfer
dsecurityofmountings,andsealsfor leaks.
s clean,andtightenmountingsandexternal
ecurely.
r properadjustment(shouldhaveJ inch
s.Inspectin thesamemannerasitem62.
d companionflangeboltssecurely.
d Play,Seals,Vents,andAlinement).
ntitemsin thesamemannerasforitem 61.
eaves,U-Bolts,Hangers,.andShackles).
re ingoodcondition,correctlyassembled,
pringshaveexcessivesag.TightenU-bolts
rsandLinks.Examineshockabsorberbodies
n,securityandfluid leaks.
rberbodieswith specifiedfluid.Workthearm
.Repeatthis operationuntilallairis expelled
sconnectthelinkandchecktoseethat the
actingshockabsorbershouldhaveresistance
ngs.Checktosee thatallmountingbrackets
tightensecurely.Thecabmountingbracket
enedcautiousl
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