tm 9-783b medium tractor m1 (allis-chalmers hd-7w), 1942

7/29/2019 Tm 9-783B MEDIUM TRACTOR M1 (Allis-chalmers Hd-7w), 1942

1/241Publ

icDomain,Google-digitized

/http://www.h

athitrust.org/access_use#pd-google


2/241

2,1942

onofthe

eAllii-ChalnunManufacturingCompany)

ructions

31-7

eddata...4-58-16

andcontrols6-2417- 30

9

ce31 4040 46

rvation....41 4247

as49-5251-53

nstructions

mainte-

pment.... 54-5557-59

6991-121

122-135

7-80136-143

equipment..81-92144-174

ments93-96175-179

0180-185

PublicDomain,Google-digitized

/http://www.h



3/241

utches101-104186-190

s105-106191-193

94-196

eassembly110-114197-206

e-off115-116207-210

tionand

nt123-129216-228

2229-230


/http://www.h



4/241

ructions

ndinstructionsarecontainedinthis

hargedwiththeoperation,lubrication,and

ediumTractorM1(Allis-ChalmersHD-7W).

ntenancerequiringspecialfacilitiesorpar-

bilityofordnancepersonnel.

uctionsforoperatingand caringforthe

ofinstructionsformakingadjustmentsand

ructionsshouldbefollowedin detailto

performance.

esisavailableinsectionXXV.


/http://www.h



5/241PublicDomain,Google-digitized

/http://www.h




/http://www.h



9/241

LATEDDATA

10).

f thecrawlerortrack-layingtypeand

hwayorcrosscountrytravelevenunderthe

onspresentedbymountains,swamps,sand,or

seofitsrelativelylowcenterofgravity,the

pesassteepas 30degreesdependingonthe

dtheload beingpulled.

dbya water-cooled,3-cylinder,valve-

gine.Amultiplespeedtransmissionisused,

angingfrom2.64milesper hourto8.35miles

eedof3.14milesperhour atfullthrottle

khasa capacityof120gallonswhichper-

erationwithoutrefueling.

omplishedbymeansofsteeringclutches

tedinthe centerofthetractorwithineasy

hlevercontrolsamultiple disksteering

erisdeliveredfromthetransmissiontothe

vablecushionsandsafetystraps andwill

randone otherman.

ntedonthe frontofthetractorandis

ertake-offfromthetractortransmission.

ertake-offis justaheadoftheseat andin

.

onthetractorincludesbatteries,elec-

ts,milemeter(odometer),engineairheater

oldweatherstarting,fireextinguisher,snatch

etools.

bers.Theserialnumberof thetractor

utchinspectioncover,andalso ontherear


/http://www.h



10/241

ATEDDATA


/http://www.h




/http://www.h



12/241

LATEDDATA

ractorMl


/http://www.h



13/241

TractorMl

nthe rightsidejustbelowthe top.The

ndona bronzeplateontheright sideofthe

nor.

power:

63.9

STOP"notch)61.6

9,310 Ib

STOP"notch)10,320Ib

16,300Ib


/http://www.h



14/241

LATEDDATA

TractorMI

teroftracks)5 ft3in.

6 in.

6in.

wbar.-20%in.


/http://www.h



15/241

iumTractorMI

speeds anddrawbarpull):


/http://www.h



16/241

LATEDDATA

STOP"notch)(speedsanddrawbarpull):

0Ib

25Ib

Ib

0Ib

(estimated)3ft

tminimumspeed):

terclutchand steeringclutch

rclutchandsteeringclutch

gability(estimated)27deg

ngability(estimated)30deg

estimated)30deg

e17in.

3-71RC14).

.)213

ottle) 2,000

n"STOP"notch)1,750

800to1,200

s(eachclutch)22

es(eachclutch,sqin.)914.5

5 ft7in.

.)2,412

s(pershoe) 4

ts%6 in.

6 in.

ngs2%6in.

34

psi)5.75

heelsand idlersTaperedroller


/http://www.h



17/241

redrum)38fpm

(maximum)562

0

dgal)23/4

al)5%

dgal)6Vfc

gal)1%

ng(U.S.std gal)1

td qt)2V4

.S.stdqt)2


/http://www.h



18/241

SANDCONTROLS

..............6

e..............................7

se.............................8

..............9

s(temperaturenormal)...........10

s(temperature40Fto0 F)........11

s(temperaturebelowOF).........12

..13

.........14

1>

............17

...18

..............................19

...............................20

.21

..22

ACTOR.

tionforanyshortageordamagewhich

ntransitor instorage.

ORFORUSE.

oilbath cuptomakesureit containsthe

ofoil(par.69).

eenginecrankcase,transmissioncase,

kreleasespringhousing,winchgearhousing,

g.

ofthe tractorwiththegreaseprescribed

eptionoftruckwheels,tracksupportrollers,

uirethe gradeofengineoil(nofDiesel oil)

dmustbe filledbymeansofa specialflushing

etractor.Theserollershavebeenfilled with

oretractorisputintooperation,theyshould be

illedtoremoveanymetalparticleswhich

acturingoperationandhaveloosenedduring


/http://www.h



19/241

ontruckwheel,frontidler,and supportroller

V.NOTE:Alllubricationpointsarepainted

f necessary,withthecorrectfueloil.

ntopreventthe entranceofdirtorforeign

ank.

thcleanwater.CAUTION:Removethe

ermostathousingwhilefillingcoolingsystem.

outofmotorblockwhilewateris putin.

tercomesoutofthe holeandfinishfilling.In

dardantifreezesolutioninthe coolingsystem.

eddaily andkepttotheproperstrength for

es.Theantifreezeusedshouldhaveahigher

eoperatingtemperature.

IESFORUSE.

ththetractor containdryplatesbutno

escrewedintightandmust remainsountil

ctrolyte.Keepventplugsandsealingdisks

batteryforservice;thendiscarddisks.

ocatedontopor underventplugs,and

allplugsare open.

veseparatorswithelectrolyteofnot

lyteisfurnishedwithtractor.)

our; thenifliquidlevelhas fallen,add

.Screwventplugsinplace.Wipe offany

20hoursat14 amperesbeforeplacing

ging(neveraconstantpotentialcharger)for

ACTOR.

tha lightloadduringthefirst 60hours.

operation,thetractorshouldbestoppedand

ndnuts,and thesteeringclutchthrow-outand

entschecked(pars.104band100).

TRUCTIONS(TEMPERATURE

ratingcontrolsand instruments.

PublicDomain,

Google-d

igitized

/http://www.h

athitrust.org/access

_use#pd-g

oogle


20/241

NSANDCONTROLS


/http://www.h



21/241

gengine,theoperatorshould checkthe

tor:

seoillevel.

ezesolutionincoolingsystem.

se boltsandnuts.Thisis especiallyneces-

enmadesincethe previousoperatingperiod.

ypulling backonshuttercontrollever.

olforward.

"STOP"notch.CAUTION:Seethatmas-

offaredisengagedandgearshift leverisin

soonasengine firesandbeginstorun, close

speed andallowenginetowarmup.When

hes160F,openradiatorshutter;shuttershould

eratingtemperatureof160Fto180 Fismain-

pressureshouldbe between25and35on

ngat fullgovernedspeedandheatedtonormal

ressuremaydropto5onthe gagewhenengine

opressure mayregisterforabout15seconds

hepressuredoesnotrise tobetween25and35

onditions,theengineshouldbestoppedandthe

uelpressureatfull governedenginespeed

nthegage.Operatethrottleto meetvarious

TRUCTIONS(TEMPERATURE40F

temperaturesofzerooralittle belowby

hengineandbatteriesarein goodconditionand

eproperviscosity.

s"IN"positionandopenthrottle to"STOP"

pumpplunger byturningV4tol/2 turn

by pressingonthebuttonat leftsideof

operatepumpwithsmoothevenstrokes.These

erformedsimultaneouslyinorderthatprac-

hroughthe airheaterwillbeburned,reducing

airboxtoa minimum.Ifthestarteris not


/http://www.h



22/241

SANDCONTROLS

oxygenintheenginewillsoonbe exhausted;

andrawfuelwill bepumpedintotheengine.

peratedforashortperiodafter enginestarts

ngsmoothly.

TRUCTIONS(TEMPERATURE

ero,itmay benecessarytousetheengine

emblyonenginein placeofoneofthe

this hasnotbeendonepreviously(fig.14).

dinto twopartsbyabaffle.The heaterexten-

part.Theloweropeningis forexhaustof

ionthroughtheairbox.

heater.

ll caseabout%fulloffuel oil,thesame

ofthe tractor.

relytopreventleakage.

poundspressurewithhandpump.

enext topreheaterfan.

tothesocketonfrontof cowlwhichis

battery.Theheaterfanshouldstart imme-

theconnectionismaintained.

ontubeorspout,andopenneedlevalveuntil

ected.Ignitespraywitha matchorothermeans.

ontube.

e topofintakeelbowandturn coverback.

iontubeintointakeelbow(fig. 14).Openair

blowhotgasesinto engineairboxandwill

ylinders.Fortheproperlengthof timeto

e followingchart:

LeaveHeaterOn

enin operationfortheproperlengthof

dlevalveandairregulator plate,removeplug


/http://www.h




/http://www.h



24/241

SANDCONTROLS

ter

nintakeelbowandfastenitsecurely.Startthe

theengineairheaterin thesamemanneras

erconditions.CAUTION:Donotattempt

eenginepreheaterhasbeenremovedandthe

urelyreplaced.

used towarmupengineforeasy cranking

bustionbyfurnishingwarmairtothecylinders.

ssarytousetheengineair heaterasthisunit

isdrawnintothe combustionchamber.

on tractor.

landpull fuelshut-offcontrolallthe

CH.

areengaged,openthe throttleandpull

ersteadilyuntilall slackistakenupbetween

ever backquicklytofullextenttolock

on.


/http://www.h



25/241

terinUse

utchinaneffort topullanoverloadat

sivewearontheclutchdiskfacingsbyshifting

essary.Donot letengineidleexceptwhen

lutchdisengaged.Ifitis necessarytokeep

orisnotin motion,shiftgearsintoneutral

.

issionhasfourforwardandonereverse

.Thegearshiftleverhas5 positions.

(figs.15and16),show thepositionofthe

nyofthe4 forwardspeedsorreverse.

terclutchlever forwardandshiftgears

nthe masterclutchleverispushedforward,

gcarrieragainst theclutchbrakeassembly

t,thusbringingthe transmissiongearstoa

pingofthe gearsenablestheoperatorto

ears.Onceaspeedhas beenselectedandthe

hergear shiftingshouldnotbedoneuntil the

edandthetractorstopped.


/http://www.h



26/241

SANDCONTROLS

ram

erPositions


/http://www.h



27/241

hetransmissionrequireslittleattention

operoillevels.Lubricatinginstructionsare

ransmissioncaseshouldbewashedwith

time thegreaseischanged.Fillto theproper

eratethe tractorinlowgearfora fewminutes,

ccomplishedbytheuseofsteeringclutches

eringleverstodisconnectpowerfromeither

e desireddirectionbypullingbacktothe

eron thesidetowardwhichtheturn istobe

eclutchonthatside andshouldbedonequickly

siveclutchwear.CAUTION:Donotrelease

yforward.Donotoperatetractorwithsteering

ged.Avoidexcessivewearofthesteering

engagingthesteeringclutchessmoothlyand

AKES.

esarefor retardingthespeedorholding

heturnstationarywhenthesteering clutch

rmakingtheturn.Alwaysreleasethesteering

hebrakewhenmakingaturn.Thesteering

ervicebrakesforretardingthespeedofthe

radeandtohold tractorstationary.

.

ownsteepgradeswiththeloadpushing

steeringclutchesisoppositetothatof atractor

dto makeaturntowardtheright,the left

eleased.Theenginebeingconnectedtothe

eretardingitsprogresswhiletheleft trackis

faster.

dwhenthe loadispushingthe tractor,

oppositethesideonwhichtheclutchis

RWATER.

eeringclutchcompartmentsaredry

ovidedwithdrainholestodrain outanyoil

ompartmentsbyoverlubricationorother

operation,theseholesare tobeleftopen.

ater,orextremedustyor sandyconditions,

eplugged withtheplugsprovidedwiththe

anceofdirt orwater.


/http://www.h



28/241

SANDCONTROLS

orintowater,the operatorshouldestimate

willbe,thekind offootingthetractorwill

engthof timethetractorwillbe inthewater.

esdeep,andtimepermits,the 2largepipe

the2drainholes inthebottomofthe trans-

ventwaterfromgettinginto thesteering

smallpipeplugshouldbeinstalledin the

utchcompartment.Withtheseplugsinstalled,

eratingin wateruptoadepth ofabout35

bladeswhenatthelowestpointare 36

measuredfromthetipof thegrousers).As

othitthe water,nodamagewillresult.If

ater,theangleofthe bladesissuchthat

intotheradiator.

plugsshould beremoveddailytoallow

htaccumulateinthecompartmentstodrain

tingonthe brakebandsorclutchfacings.

t,the plugsmayberemovedtodrainthe

stalledinthemorning.Inspectthefinaldrives

h,andrefillthecaseas oftenasthelubricant

mudor water.

asterclutchandsteeringclutchcompart-

tin tractortoolboxwhenremovedtoprevent

mwith tractorwhenneededagain.

ONTROLS.

Withgearshiftlever inneutralposition

ged(leverpushedforward),engagewinch

onoutsideleveron rightfender.(Itmaybe

drumslightlyby pullingbacklightlyonthe

rfor thewinchclutchjawstoengage.)Then

tleverbackuntil thelockonthelever

(unwindingpositionfor unreelingcablefrom

rake,engagethemasterclutch,andthecable

Unreeljust enoughcablesothatthehook

anddisengagethemasterclutch.

s attached,pushpowertake-off

ckcatchesinrearnotch (windingposition).

ing thebrakepedalsdownhardandlock

allocklever.Engagemasterclutchandcable

NOTE:Winchcanbeoperatedineitherof

actorauxiliarygearshiftlever.In"DIRECT"


/http://www.h



29/241

chrunsathighest speed.In"INDIRECT"

44 percentofthespeedwhenin "DIRECT"

ngincreaseinlinepull isobtained.Use

erclutchsothatslackin cablewillbetaken

blebreakageorexcessivestrainon winch.

oundevenlyandsmoothlyonthe drum.

gmasterclutch.Ifloadis tobemoveda

eheldtaut whenmasterclutchisdisengaged

akeonthewinchwormshaft.If cableis

ted,movetractoraheadtorelievestrainso

ndcableup,releasewinchclutch,andpull

erintoneutralposition(lockinmiddlenotch).

deleveron fender)bypushingitforward.

inchclutchwhenwinchisunderload.

brakeisused onlytocontrolthedrum

andor ifanothermachineispullingonthe

N:Besurewinchclutchis disengagedif

ay.

tobeparked,especiallyona slopewhere

ing,thetractorfootbrakeshouldbe setby

ownas possibleandliftingpedallocklevers

emonthe tractorisdesignedtooperate

edvehicleandthoseonthe tractor.Proper

ttherearofthe tractor.

tswitchatleft ofdashhasthreepositions

ights.Whentheknobispulled outtothe

tlightsare turnedon.Forregularservice

he topoftheswitchmustbe presseddown

esecondstop.Tousethe stoplightonly,for

onand pullknobfullout.This lightgoeson

asterclutchleverispushedforwardtodisen-

donbypullingout onknobmarked

otlightunlessotherl ightshavebeen

hingknobsallthe wayin.


/http://www.h



30/241

SANDCONTROLS

selectricallyoperated.Asmallauto-

osedbyoil pressureassoonasthe engineis

e reaches5pounds.Thesmallhandat thetop

rtrotating.Thishand istoindicatewhenthe

.

centerofthedial recordthenumberof

tedandare ofthreedifferentlengths.Total

eadingthenumbereachhand haspassedin

aclocktoseewhichnumberthehour hand,

econdhandhave passedandtherebytell

res1,000hours ofoperationforitto

00fora completerevolution.Asshownin

een"2"and"3,"whichindicatesover2,000

icatesthatthefirst numeralinthenumber

,"followedby threeothernumeralsindi-

othertwohandswhichinturn showhow

00thatthe tractorhasoperated.

PublicDomain,

Google-d

igitized

/http://www.h


_use#pd-g

oogle


31/241

requires 100hoursofoperationforit to

0hoursfor acompleterevolution.Inthisillus-

3"and"4,"whichindicatesover300 hoursthat

00.Thesecondnumeralthenwillbe"3."Now

ongesthand todetermineinthesameman-

be addedtothe2,300indicatedbythe other

res1 hourofoperationforit topasseach

0 hourstopasseachnumeralor100 hours

Hereitstandson thesecondmarkpast"9"

obe addedtothe2,300sothat thecorrect

eftofdialwill continuetorotateforap-

rengineisstoppedor untiloilpressuredrops

(odometer)islocatedatthe leftsideof

edshouldbeenteredin logbookforrecord

sdrivenby aflexiblecableextendingfrom

transmissioncasetoaspurgear drivenbya

ofthelowertransmissionshaft.

Referto paragraph23onreadingof

rshouldbe readinexactlythesamewayas

tmileswill benotedinsteadofhours.


/http://www.h



32/241

ctionsforusingarms27

orlubricatedbyordnancemaintenance

nillustrations30

ninstructionsfortheMediumTractorM1

republishedfortheinformationandguidance

rsedeallpreviousinstructions.

sforallpointstobe servicedbytheusing

onguide,whichspecifiesthetypes oflubri-

rvalsat whichtheyaretobeapplied.

ONINSTRUCTIONSFORUSING

andaccompanyingnotesgivedetailedlubri-

garmpersonnel.

EDAND/ORLUBRICATEDBY

EPERSONNELONLY.

pumpis packedatassembly.Ifdisas-

kbearingswithGREASE,ballandroller

kallball bearingswithGREASE,special,

earingswith GREASE,special,high

armatureshaftsurfaceswithOIL,engine,


/http://www.h



33/241

ed

Points

ted

ows.

I.,

GI.

M-.

40'''

cationofWINCH

DLUBRICANTSTOBEUSED

HOOD


/http://www.h



34/241

dServiceInstructionsonindividualUnitsandParti.

ricationandServicebelow0,referto SecffionXXIII.

eapplyinglubricant.(Winchfittingsonly)Lubricateuntilnewlubricantis

nlessotherwisespecified.CAUTION:Lubricateafterwashingtractor.

hours,checklevel.Every8to 30hours,dependingondustconditions,clean

ark withusedcrankcoseoilorOE.crankcasegrade.Twiceayear,remove

dreoil.Cleanair pipesandreassemble.Keepallconnectionstight.Every8

required,emptyprecleaners.CAUTION:Donotallowd1rtlevel toriseabove

cleanersisessentialtoprolongedenginelife.

lywhenengineishot.Refill tofULLmarkon gage.Runengineafewmin-

CAUTION:Besurepressuregageindicatesoil iscirculating.SeeTable.

,checklevelwithtractoronlevelgroundand,if necessary,addlubricantto

sualinspectionforleakageandreportleakagetoOrdnanceMaintenance

drefillasind1catedat pointsongu1de.Whendraining,drainimmediately

ours,cleanandreo1lgauzein powertake-offfillpipewithOE,crankcase

tone-halfcapacitywithOE,SAE10.Operatemechanismwithincases

andredrain.Replacedrainplugsand refillcasestocorrectlevelwithlubricant

ON:Bearingsontheupperpowertake-offshaftaresplashlubricated.Ifthe

wertake-offdisengaged,thesebearingsw1llreceivenolubrication.Powertake-

ast onceadayandoperatedfora fewminutestoinsurethatthesebearings

RS,IDLERSANDTRUCKWHEELS Removeplugsand flushwithGO,

TION:Servicefront1dlerswith5strokeseach,tracksupportrollerswith3-1/2

eelswith4strokeseach,using ACflushinglubricator.

OWOUTBEARINGSToreachfittings,removedriver'sseatandtoolbox.

CLUTCHCOMPARTMENTS Daily,afterusing tractorremoveplugsto

placeplugs.CAUTION:Besurethatplugsareinplacewhenoperatingin deep

sterclutch Washingofclutchunitsaboutevery240hours isessential

thefollowingprocedure:Lubricatethrowoutbearingsuntiltheyarefilled.

ofsteeringclutchcompartment.Fillcompartmentwith5gal.ofSOLVENT,

eltoabout4in.belowsteering clutchshaft.Startengineandruntractorback

eswithoutreleasingsteeringclutches.Stoptractorand draineachcom-

ndrefillwithsameamountofcleanSOLVENT,dry-cleaning.Operatetractor

s,releasingbothsteeringclutchesasoftenaspossible.Drainand permit

clutchthrowoutbear1ngsandmechanism.Drain,flushandrefillfinaldrive

specifiedonLubricationGuide.

agefuelfilterlocatedunderseat; secondstagefilterondash;thirdstage fil-

500hours,dependingonoperatingconditions,removeandrenewele-

ndthefiltershellsin goodcondition.Daily,opendraincockstoremovesedi-

d,lubricateoutboardbearingthroughoilerwith OE,SAE30.

hcrankcaseoilchange,cleantheoilfilter. Aftercleaningfilter,refillcrankcaseto

ngineafewminutesand recheckoillevel.

ginfilter baseanddrainfilterbody.Removenutfromtop offilter

l, Removefilterelements.WashelementsinSOLVENT,dry-cleaning,being

tortelements.Dry allpartsandreassemblefilter.

Ifslidingclutchsticks,washandreoilwithOE,crankcasegrade.

muddyconditions,thesliding jawclutchmustbecleanedfrequently

segrade,toinsuresmoothoperation.

ery60hours,lubricatecontrolshaftsandcleviseswithOE,crankcasegrade.

OLUBRICATIONSERVICE Waterpump,tracks,clutch,pilotbearing,chain.

cationGuide


/http://www.h



35/241

paring!)!

eeTable)

g


/http://www.h



36/241

ation


/http://www.h



37/241

WOUTBEARINGS

tings


/http://www.h



38/241

tings


/http://www.h



39/241

kWheelWithFlushingLubricator

uckWheels


/http://www.h



40/241

RDS.

structionsarecloselyfollowed,proper

actoryresultsarenotobtained,areport willbe

cerresponsibleforthemaintenanceofthe

cordoflubricationservicingwillbekept

RICATIONILLUSTRATIONS.

helocationoflubricationfittingsandthe

sarelubricated.


/http://www.h



41/241

CE

on33

34

oursofoperation35

hoursofoperation36

indeepsnow,..".37

insandyterrain38

indeepmud... 39

inwater40

ficiency,itisnecessarythatthetractorbe

atregularintervalsinorderthatdefectsmaybe

,andthenecessaryadjustmentsmadebefore

astingsorother metalpartsmayoften

depositsafter-thecompletionofarun.Gen-

ldbenotedatall inspectionperiods,andparts

ausetheyarenearlywornoutshouldbereported

s.

TION.

ted,the operatorororganizationpersonnel

g:

agetodetermineenginecrankcaseoil

"FULL"mark,add1quartofthecorrectoil

w"FULL."SeesectionIVfor correctlubricant.

reezesolutionincoolingsystem.Addwater

watercanbeseenwhenradiatorcapis

forlooseboltsornuts, especiallyifrepairs

previousoperatingperiod.

drives.Keepfilledtolevel offillerplug.

bricant.

evel.Thislevelshouldbe keptbetween


/http://www.h



42/241

CE

onbayonetgage.SeesectionIVforcorrect

tortoolequipment.Reportanytoolsor

g.

fire extinguisher.

evers workfreelyandcorrectly.

ndbrakesareinoperatingcondition.

,whichtractorispulling,is securely

blesorchainsarein place.

struments.Oilpressuregageshouldread

ro,ammeterzero,etc.

entsumps(figs. 26and27).

OPERATION.

eita habittoglanceoftenatthe operating

partsoftractorarefunctioningproperly.He

onsof abnormaloperationoftheengineand

tuate,thecauseshouldbeimmediatelydeter-

esoperatingtemperature(170to180F),oil

35pounds,fuelpressure20to 30poundsat%

uttershouldbe regulatedtokeepengineat

masterclutchengagesanddisengages

d toengageclutchisasit shouldbe(50to

unning).

ootbrakesshould becheckedforclear-

sshouldbedetectedandcorrectivemeas-

PERATION.

uldbeinspectedaftereachday ofopera-

ghtupto"FULL."

vel.

vel.

l level.

evel.

.

pwaterlevel3/ inchaboveseparators.

27).Emptydirt outofcompartment.

cup,clean,andrefillto properlevel.

entsumps(figs. 26and27).

nuts,or brokenparts.


/http://www.h



43/241

EACH50HOURSOFOPERATION.

ent(par.99).

outadjustment(par.103b).

106).

djustment(par.111b).

etybrake(par.116b).

rankcaseandcleanlubricatingoilfilter


/http://www.h



44/241

CE

ratinghours

ndcleandirt

tionormore

ondition.

entshould

mehigher

ilterelements

condstage

uelfilter

ssure indi-

ed.

elinbatteries,

tilledwater

el3/8"

pofbatteries

terpumpdrain

eopenedto

Whenfilling

ustbere-

eslevelof

pe.Drain,

temevery

wateranddirt

atedunder

Thisshould

tingperiod.

ctions


/http://www.h




/http://www.h



46/241

CE

ACH100HOURSOFOPERATION.

ent(par.83i (2)).

r.76 e).

nections.

beisnot clogged.Removeandclean,

ter underseat(figs.23and 24).Install

ssary.

PERATIONINDEEPSNOW.

enoperatedin deepsnow,thefollowing

e:

now,install the2largepipe plugsinthe

ofthetransmissioncasetopreventsnowfrom

utchcompartment.Thesmallpipeplugshould

oleofthemasterclutchcompartment

asbecomehard-packedinthetrackopen-

ers,andtruckwheelsfor anydamage.

leforanydamagewhichmayhavebeen

hiddeninthe snow.

PERATIONINSANDYTERRAIN.

enoperatedin sandyterrainordustladen

ginspectionsshouldbemade:

removeanyaccumulateddirt.

cleanand refillwithnewoil,if necessary.

ers.Cleanfiltersorreplacefilteringele-

PERATIONINDEEPMUD.

enoperatedin deepmud,itshouldbe

dremoved,andthefollowinginspections

ngstodetermineif theyhavebecome

veanymudpresentandlubricatepart.

wheelsforfree movementtodetermine

ayintobearings.


/http://www.h



47/241

PERATIONINWATER.

forany lengthoftime,thetractorshould

standfor ashortwhile.Thedrainplugs in

ckreleasehousing shouldbeloosenedand

any waterordirthasenteredthese housings.

tincoldweatherwhenthe watermight

hasenteredthesecompartments,theyshould

drefilledwith cleanoil.


/http://www.h



48/241

SERVATION

mustbekeptof eachmotorvehicle

epartment.ForthispurposetheMotor Book

O.FormNo.7255),generallycalled"Log

vehicleandmustaccompanyitatall times.

pleterecordofthe vehiclefromwhichvalu-

ngoperationandmaintenancecosts,etc.,is

ncommandersmustinsistthatcorrectentries

bituallybe keptinacanvascovertopre-

orsoiled.

epagebearingarecordofassignment

entering acombatzone.Allotherreferences

rdingtheidentityof theorganizationmust

hesourcesofgreatestwearto avehicle.

reallowedto accumulate,particleswillsoon

surfaces,causingunnecessarywearand,if

ed,willsoon causeseriousdifficulty.When

nyotherunit inmakingrepairsandreplace-

ofinspection,workingjointsorbearingsur-

dirt andgritthatmight finditswaytothe

stbecarefullyremoved.Thetoolsmustbe

ysbetakentoeliminatethe possibilitiesof

eopeningwiththesleeveor otherpartof

keddirtandgrit, hardenedgrit,orroadoil,

ng,appliedwithcloths(notwaste)or a

ntokeep waterfromenteringelectrical

r,generator,etc.Detailedinformationonclean-

0.

gswhichhavebecomecloggedshouldbe

a pieceofwire.Woodshouldneverbeused

s arelikelytobreakoffand permanently

cularcareshouldbetakentocleanand decon-

vebeencaughtinagas attack.Seesection

ygasfor detailsofthisoperation.


/http://www.h



49/241

es48

ntedbeforeissuetothe usingarmsand

ryearwillordinarilybeamplefor protection.

ismaterielwillbe paintedwithENAMEL,

erless.Theenamelmaybeappliedover>ld

d oilpaintpreviouslyissuedbythe Ordnance

s insatisfactoryconditionforrepainting.

suallyissued readyforuseandare

They maybebrushedonsatisfactorilywhen

nalpackageconsistencyorwhenthinnedno

umewithTHINNER.Theenamelwill spray

dwith15percentbyvolumeofTHINNER.

sedasathinnersinceit willimpartaluster

.)Ifsprayed,itdrieshardenoughfor repaint-

eshardin16 hours.

npaintingiscontainedinTM9-850.

TING.

materielisin poorcondition,itismore

aintfromthesurfacethantouse sanding

terstripping,itwillthenbe necessarytoapply

nishing,shouldbeusedonwoodasa

amel.Itmaybe appliedeitherbybrushing

atisfactorilyasreceivedoraftertheaddition

ntbyvolumeofTHINNER.Itwillbe dry

utes,andhardin5 to7hours.Forspraying,

tmorethan15percentby volumeofTHIN-

eappliedtothe PRIMER,synthetic,refin-

hours.


/http://www.h



50/241

-inhibiting,forbaremetal,shouldbeused

suse andapplicationissimilartothat out-

e.

paintingdependspartlyontheselection

olargelyuponthecareusedi npreparing

g.All partstobepaintedshouldbe freefrom

e,oil,andalkali,andmust bedry.

FACES.

dofcleaning,theyshouldbe washed

ingofl/zpoundofSODAASHin 8quarts

alentsolution,thenrinsed inclearwaterand

odpartsinneedof cleaningshouldbetreated

e alkalinesolutionmustnotbeleft onfor

ndthe surfacesshouldbewipeddryassoon

Whensurfaceofthe tractorisinfair condi-

ots,thebadplacesshouldbetouchedwith

-drab,lusterless,andpermittedtodry.The

sandpaperedwithPAPER,flint,No.1,and

nthetic,olive-drab,lusterless,appliedand

beforethematerielis used.Iftheequipment

tsshouldbethoroughlysandedwithPAPER,

ivena coatofPRIMER,synthetic,refinish-

r atleast16hours.Theywill thenbesand-

No.00,wipedfreefromdustand dirt,and

thetic,olive-drab,lusterless,appliedand

beforethematerielis used.

AGE.

jorconsiderationinpaintingordnance

tionsecondary.Thecamouflageplanatpresent

ctors:color,gloss,andstenciling.

aintedwithENAMEL,synthetic,olive-

schosentoblendinreasonablywellwith the

essenamelmakesavehicledifficultto

lativelygreatdistancesoverland.Avehicle

sypaintcanbedetectedmoreeasily andat

ncilnumbersonvehicleshavebeenelimi-

ephotographedfromtheair.A blue-drab

whichcannotbeso photographed.Itisilleg-

sexceeding75feet.


/http://www.h



51/241

e.

bbingmustbe avoided,asitwillsmooth

gloss.Thevehicleshouldnot bewashedmore

ouldbetakento seethatthewashingis done

softrag.Thesurfaceshouldneverbe rubbed

t,oragloss willdevelop.

vehicles,paintedwithlusterlessenamel,

eswerekeptwhenglossypaintwasused.A

asesthecamouflagevalue.Greasespotsshould

T,dry-cleaning.Whateverportionofthespot

uldbeallowedto remain.

ax-treatedtarpaulinsonthesidesof a

gloss,whichshouldbe removedwith

intingwitholive-drabpaintwill beneces-

e-drabpainttwiceyearly.

s,thepaintmaybecomesothickas to

es,presentinganunsightlyappearance.If

eold paintbyuseof alime-and-lyesolution

r REMOVER,paintandvarnish.Itis

eoflyeor otherpaintremoverbecompletely

uipmentbeperfectlydrybeforerepaintingis

thattheuse oflyesolutionsbelimitedto

onwood,thelye solutionmustnotbeallowed

r morethanaminutebeforebeingthor-

rfacewipeddry withrags.Crevicesor

ledwith puttyandthewoodsandpapered

facesthuspreparedshouldbepaintedaccord-

phs44 and45.

NGDEVICES.

oilholes,andsimilarlubricatingdevices,

inchindiameterat eachpointoflubrication

EL,synthetic,gloss-red,inorderthatthey


/http://www.h



52/241

AS

tomotivemateriel52

RES.

stantdangerofgasattack,unpaintedmetal

dwithengineoil.Instrumentsareincluded

otectedbyoilfromchemicalcloudsorchem-

nisexcluded.Carewillbe takenthattheoil

anvasfittings.Materielnot inusewillbe

araspossible.Ammunitionwillbe keptin

acticallynoprotectionagainstmustard

oilcloth,forexample,willbe penetrated

ger theperiodduringwhichtheyareex-

gerofwearingthese articles.Rubberboots

tedwithmustardgasmayoffer agrave

emseveraldaysafter thebombardment.

resistpenetrationmorethananhour,but

han this.

sof materielthathavebeenexposedto

ndlewisitemustbe cleanedassoonaspos-

leaning,orALCOHOL,denatured,and

then becoatedwithengineoil.

chemicals(mustard,lewisite,etc.)from

psshouldbetaken:

ES.

onsacompletesuitofimpermeablecloth-

kwillbeworn.Immediatelyafterremovalof

withsoapandwater(preferablyhot)must

havecomeincontactwithmustard,ifeven

ardgetsintotheeye,or ifthevaporof mustard

perativethatcompletefirst-aidmeasuresbe

utesafterexposure.First-aidinstructionsare

21-40.


/http://www.h



53/241

mustardwillbe decontaminated.Ifthe

sbeenexposedtovaporonly,itmaybe

ngintheopenair,preferablyinsunlight,for

e cleanedbysteamingfor2hours.If the

sbeencontaminatedwithliquidmustard,steam-

required.Variouskindsofsteamingdevices

aterialsavailableinthefield.

materielofdirtthroughthe useofsticks,

urnedorburied immediatelyafterthisopera-

terieliscoatedwithgreaseor heavy

dberemovedbeforedecontaminationisbegun.

otheravailablesolventsforoil shouldbe

endsof sticks.

ntedsurfacesofthematerielwithbleach-

gonepart AGENT,decontaminating(chlo-

water.Thissolutionshouldbeswabbedover

oughlywithwater,thendryand oilallsur-

ndall unpaintedmetalpartsexposedto

edecontaminatedwithAGENT,decontam-

xedonepartsolidtofifteenpartssolvent

RIDE).Ifthisisnotavailable,usewarm

gsolutionmustnotbeused,becauseof its

metalsurfaceslightlywithengineoil.

econtaminating(chlorideoflime),isnot

etemporarilycleanedwithlargevolumesof

ardlyinginjointsor inleatherorcanvas

ythis procedureandwillremainaconstant

materielcan beproperlydecontaminated.

materielinthis mannerliesunchangedonthe

tthecontaminatedareabeplainlymarkedwith

donment.

minatingofmaterielcontaminatedwith

ompoundsintothesoil,poisoningmanywater

eithermenoranimals.

bingthathasbeen contaminatedshould

thbleachingsolution.Intheeventthis treat-

benecessaryto burnorburysuchmateriel.

ndecontaminationiscontainedinFM

8,1941,Decontamination.


/http://www.h



54/241

AS

SFORAUTOMOTIVEMATERIEL.

en subjectedtogasattackwiththeengine

ouldbe servicedbyremovingtheoil,flushing

ng,andrefillingwiththe propergradeof

hionswillbediscarded.

entsthoroughlywithbleachingsolution

neinthe field.Operatorsshouldconstantly

ningunderconditionsofhightemperatures,

emustardor lewisite.

cleswillbedecontaminatedwithbleach-

aybenecessaryafterthisoperation.

PublicDomain,

Google-d

igitized

/http://www.h


_use#pd-g

oogle


55/241

nstructions

NMAINTENANCE

ceandrepairsbythe crewandotherunits

minedbytheeasewithwhichtheprojectcan

ountoftimeavailable,weatherconditions,

mentavailable,theskillofthepersonnel,and

hmaybepresent.

owareincludedin orderthatthename

rrectlyinterpretedbythosedoing thework.

eaning,lubricating,tighteningboltsand

adjustmentsofsubassembliesorassemblies

kingrepairstoa part,subassemblyor

telydisassemblingthesubassemblyorassem-

eavyweldingor riveting,machining,fitting,

emovingthepart,subassembly,orassem-

placingit withaneworreconditionedor

ecasemaybe.

intenancedutieswhichmaybeperformed

:

fler(par.60)Replace

Adjust

ar.57)Replace

PublicDomain,

Google-d

igitized

/http://www.h


_use#pd-g

oogle


56/241

NMAINTENANCE

ce

eor replace

s(par.67)Repairor replace

ce

Clean

rreplace

ceorreplace

Replace

place

replace

place

dflush

r.74)Replace

eplace

r.71)Replace

e

e

e,service,orreplace

Replace

orreplace

e

orreplace

ce

unit(par.84)Replace

ce

par.85)Replace

MENTS

4)Replace

ge(par.93)Replace

r.96)Replace

5)Replace


/http://www.h



57/241

ar.99)Adjustorwash

mbly(par.100)Adjust

03-104)Adjustorwash

Adjust

09)Adjust

MEASSEMBLY

eandaline

Replace

ar.111)Adjust

113)Replace

2)Replace

112)Serviceor replace

)Adjust

eplace

48)


/http://www.h



58/241

UIPMENT

4

ATION(fig.29).

e furnishedasstandardequipment

rried

HD-7(1)Inbox

(1)Inbox

seatbackcushions)(4)Inbox

ckcushion)(2)Inbox

usedwithvalvelifterand

ntool box

pe(1)In box

hhose,levertype(1)In box

nsistingof:

ectortiming(1)

1)

RE,probing

of:Intool box

6-in.andV2-in.(1)

n.and1V16-in.(1)

-in.and25/32-in.(1)

n.and3/4-in.(1)

.and1Vl6-in.(1)

and1Vi-in.(1)

goilsforusein positiveseal

,andfinaldrives(1)Inbox

hhose(1)Inbox

nbox


/http://www.h




/http://www.h



60/241

UIPMENT

rried

box

box

ctorremoval(1)Intool box

attachingseatbackcushion)(4)..Inbox

g(1)Intoolbox

)Intoolbox

PUMP,water(1)Intoolbox

toofbox

ntoolbox

ntoolbox

olt(1)Intoolbox

ntoolbox

(1)Intoolbox

in(1)Intoolbox

tools andequipmentshouldbekeptin

dconditionmaybe knownatalltimes.Items

eableshouldbeimmediatelyreplaced.Alltools

leanedandinproper conditionforfurther

totheir location.


/http://www.h



61/241

troubleshooting,removal,and

fler60

ON,DATA,TROUBLESHOOTING,

TION,

torisawater-cooled,2-cycleDieselwith

fersfromthe conventional4-strokecycle

nly2strokesofthe piston,1upand1 down,

ycleinsteadof4strokes asinthe4-cycle

ne,intakeandexhaustoccurtogetherwhen

ofitsstroke;everyupstrokeis acompression

deliverspower.Thustheintakeandexhaust

neareeliminated.The2-cycleengineexhausts

cylinderswithfreshair,notbythe pumping

but bymeansofarotaryblowermountedon

eanddrivenfromthe enginecrankshaft.As

fitspowerstroke,theexhaustvalves(2 for

erheadopento allowtheburnedgasesto

overstheintakeportsin thelowerpartof

n eachcylinderliner)topermitfreshair

,forcingburnedgasesoutthroughtheexhaust

erwitha newchargeoffreshair(fig.30).

compressionstroke,itclosesofftheintake

lose,andthechargeof airiscompressedinto

hiscompressioncausestheair tobecomeex-

eselfuel isinjectedintothishot compressed

forethepistonreachesthetopof itsstroke.

otairand burns.Theexpansioncausedby

esformedforcesthepiston downonitspower


/http://www.h



62/241

ofEngineShowingCirculationofAir

eadilyaccessible.Ontheright-handside,

or'sseat,is locatedtheblower,enginegover-

oil filterandcooler,andwaterpump(fig.31).

ter,andgeneratorare mountedontheleft-

terpumparedrivenbythe lowerblower

neratorare drivenbyV-beltsfromapulley

ndtiminggear coverarebolteddirectly

derblock(fig.34).Lifterhooksare pro-

ofthe cylinderhead.Theseassistgreatlyin

ofthe engine.


/http://www.h



63/241

TER

ER

LER

OSE

SEANDOILCOOLERCONNECTION

gine


/http://www.h



64/241

ine

otors3-71RC14

approx.),dry1,550Ib

2,000rpm82.0

.

uin.

percylinder2

rankingrotation)132


/http://www.h



65/241

e


/http://www.h



66/241

td 11qt

edfromoperator'sseat):

ise

se


/http://www.h



67/241

se

crankshaftspeed:

CESSIVEVIBRATIONOFENGINE.

firing.

supply.

d

ngine.

rs.

g).

ons.

ar64).

gtem-

gin

s.

, f,

71c

dge.

escopeofoperatingorganization.Notifyordnancepersonnel.


/http://www.h



68/241

nt.

stment.

g).

XHAUST.

viced.

askets

9).

andd).

asket

8b,c,

g).

ande).

ar.58b).

HAUST.

s.Checkfuelsystem.

mbustion* Inspectforcauses.

ualizeinjectors(par.66g).

KNOCKS).

tingrod* Replacebearings,

g).

ande).

escopeofoperatingorganization.Notifyordnancepersonnel.PublicDomain,Google-digitized

/http://www.h



69/241

Remedy

.Adjustvalveclearance

mbustion* Inspectforcauses,

Tractor.

4-m.(2)

n

NCH,open-end,ll/1e-m.

NCH,open-end,7/8-in.

CH,open-end,1-in.

Hsocket,V2-in.

ORREMOVALOFENGINE.

nenginecrankcase,andshut-offfuelat

k.

.

eachcornerofhood.Prybolts fromclips.

pipe.NOTE:Removeboltatleft rearcorner

s.70and 71).

ERS.

screwsfromleftfrontfender,also1bolt

t frontfender.Removefenders.

ESHAFTGUARDANDBRACKET.

NCH,%-in.

mfrontendofwinchdrive shaftguard

e3boltsfromrearofguard(two3A-\n.and

toffguard(fig.35).Removethe2capscrews

nginesupport(fig.36),(7/B-in.wrench).

thecorresponding2capscrewsfromopposite

e2 remainingcapscrewsholdingradiator

wrench).

escopeofoperatingorganization.Notifyordnancepersonnel.


/http://www.h



70/241

chDriveShaftGuard

pScrewsfromWinchDrive


/http://www.h



71/241

NDOUTLETWATERCONNECTIONS.

NCH,socket,V2-in.

ndslidehoseonto radiatorinletpipe(screw-

ewsfromenginesupportbottomcover(fig.

ovecover.Remove2capscrewsfromlower

oolerinlet(V2-in.wrench).

LY.

ingfanassemblytobalanceweightcover.

erpulley,tiltradiatorforward,andlift out

.37).

Assembly

RCONTROLANDHEADLIGHTWIRES.

ontrolrod.Disconnectheadlightwiresat

erator.

SSEMBLY.

previouslyloosenedholdingradiatorto

earoundradiatorassemblyunderheadlights,

andlift offradiatorassembly(fig.38).


/http://www.h



72/241

iatorAssembly

CLUTCHCONTROL.

movepinholdingclutchcontrolrodto

ESSUREGAGELINE.

.

gelinefromenginebeneathblower(fig.39).

NES.

.(2)

fromfuelpumpto secondfuelfilter.Dis-

PublicDomain,

Google-d

igitized

/http://www.h


_use#pd-g

oogle


73/241

gLubricatingOilPressureGageLine

D

pScrewfromCliponThermoGagetine

PublicDomain,

Google-d

igitized

/http://www.h


_use#pd-g

oogle


74/241

el pump(figs.66and61).Disconnectfuel

ge fuelfiltertothird stagefuelfilter.Dis-

agelineat topofthirdstage filter.Disconnect

nderneathrightsideofcowl.

OGAGETUBEANDLINE.

Hopen-end,"/^-in.

efromrearofwatermanifoldandremove

engine rearlifterbracket(fig.40).Replace

clipis removed.

ECONTROLSANDWIRES(figs.41and 42).

edalatstarting motorswitch(pliers).Dis-

ontshut-offrodat throttleshaftbyremoving

atterycableatbatteryandstartingmotor

sconnectammeterwireatvoltagecontrol

ATER(fig.42).

%6-in.(2)

ineatcheckvalveon heatercover(two

veclipfromcylinderblockendplate,holding

nut frombolt(%6-in.wrench).Remove2

ver(V2-in.wrench),removecover,anddis-

ench).

HRELEASEBEARINGGREASETUBE.

ubetomasterclutchreleasebearingand

masterclutchcompartment(fig.44).

AKEHOSE(Seefig.31forlocation).

ushhose,backontoairintake elbow.

MFRONTENGINESUPPORT.

H,15/16-in.

ds offrontenginesupport(fig.43).

sbetweenthelowersideofenginesupport

heseshimssotheymay beusedagainwhen

ractor.

PublicDomain,

Google-d

igitized

/http://www.h


_use#pd-g

oogle


75/241

gThrottleRod

BREATHERTUBE.

vernorbreathertubeandlifttube from

g. 85).

WSFROMFLYWHEELHOUSING.

H,3/4-in.

sholdingflywheelhousingtoenginespacer

NOTE:Fourofthesecapscrewswillbe

themasterclutchhousingthrough2 inspection

cer(fig.115).Removeclutchcoverplatesby

mcoversandliftoff covers.Alsoremove2cap

hcoverandremovecover(3/4-in.wrench).

PublicDomain,

Google-d

igitized

/http://www.h


_use#pd-g

oogle


76/241

HeaterFuelL/neClip

bracketeyesof engineatbothendsof

semotorjustenoughto slideitahead.Reach

gandenginespacerandremove12capscrews

ywheel(%6-in.wrench).Pushclutchassem-

neassemblyfromtractor(fig. 45).

emovedEngine.Beforeinstallingengine

tandgreasefrom theenginesupportand

ent.Atthesametime,inspecttheenginesup-

cerandmasterclutchcompartmentandas-

m,andifanyrepair workisnecessaryonthem,

alled.Checkenginespacerandenginesupport

ghtandthat nonearemissing.Checkbolts

oenginesupporttosee iftheyaretight.Repair

iresorfuel lines.

PublicDomain,

Google-d

igitized

/http://www.h


_use#pd-g

oogle


77/241

tsfrontFrontEngineSupport

GGREASETUBE

pScrewHoldingEnginetoSpacer

PublicDomain,

Google-d

igitized

/http://www.h


_use#pd-g

oogle


78/241

inefromTractor

Tractor.

g

n.

n.

n.

6-in.

PublicDomain,

Google-d

igitized

/http://www.h


_use#pd-g

oogle


79/241

TCHONCLUTCHSHAFT,(fig.46).Place

nclutchshaft,takingcaretoseethat slotson

ceon slidingblocksonreleaseyokeand

lacedon thereleaseyokesothatflangesare

nstalldrivenplateassemblyon clutchshaft

enplateassemblytowardfrontoftractor.

OSITION(fig.45).

ocket,%6-in.

lowerengineevenlyinto enginesupport

kingsurethatend ofclutchshaftengagespilot

nstallthe10 capscrewswithlockwashers

ssembly(%6-in.wrench).

FRONTENGINESUPPORT.

8-in.

ossiblewithoutraising frontofenginebe-

MasterClutchonClutchShift

PublicDomain,

Google-d

igitized

/http://www.h


_use#pd-g

oogle


80/241

tandenginesupportbracket.Thenraisefront

e shimtoeachside.Installthe 2boltswith

enginesupportandshimsto enginesupport

SEMBLYTOFLYWHEEL.

ngWRENCH,socket,%6-in.

utchinspection,coverholesintransmis-

asterclutchassemblyagainstflywheel,lining

ackplatewithholesin flywheel,andinstall

kwashersholdingmasterclutchto flywheel

heenginewillhavetobeturnedwhile

swithenginecrankingwrench.

UTCHCONTROLROD.

H,^6-in.

otterpinholdingmasterclutchcontrolrod

ransmissioncase.Adjustmasterclutchand

section17.Insert clutchthrow-outbearing

ntransmissioncase(fig. 44),andinstalllock

COVERS.

rusing4capscrewsand lockwashershold-

aseandinstall the2coverplateswith4 cap

rplatetospacerassembly(fig.115).

NE.

.

inetofitting incylinderblockbeneath

(figs.61and66).

n.(2)

el pump.Installandconnectoutletfuel

wercouplingonsecondstagefilter.Install

eattop ofsecondstagefiltertothird stage

ngine.Connectthereturnfuelline tofitting

wl.Connectfueloilpressuregage linetotop

IRSHUT-OFFROD.

offrodat longshut-offleveratrearof

otterpin (fig.41).

PublicDomain,

Google-d

igitized

/http://www.h


_use#pd-g

oogle


81/241

ROD.

odtoleverto shortshut-offleveratrearof

otterpin (fig.41).

EHOSE.

bowontoairintaketubeandtighten hose

GAGELINE.

Hopen-end,^-in.

dercapscrewholding rearenginelifter

ne (fig.40).Insertthetubein thefitting

enthetube nut.

COVER.

H,V2-in.

H,open-end,9/16-in.

etocoil (3/8-in.wrench)andinstallair

ewswithlockwashers(V2-in.wrench).Con-

eckvalvecliptoairheatercoverwiththe

airheaterfuellineto checkvalve(two%6-in.

fuellinetolowerleft boltonrearcylinder

3/8-inchnut andlockwasheronbolt(%6-in.

WIREANDSTARTERCABLE.

dbatterycabletostartingmotorswitchpost

WIRETOVOLTAGECONTROLUNIT.

eterwiretovoltagecontrolontopofgen-

MOTOR.

onstartingmotorswitchleverandinstall

OMSTARTINGMOTORTOBATTERY.

tteryterminalandtightenclampbolt

PublicDomain,

Google-d

igitized

/http://www.h


_use#pd-g

oogle


82/241

ASSEMBLYINTOPLACE.

adiatorassemblyinto position,atthesame

ercontrolrodinto placethroughleftside

g. 38).Installthe2 (1oneachside)cap

nthelowerfront cornerofradiatorshell,but

rews.Tilt radiatorforwardasfaraspossible,

es,andlowerfan assemblyintoposition

wswithlockwasherssecuringfanassembly

ndtiltradiatorbackinto anuprightposition.

ESHAFTGUARDBRACKET.'

ardbracketoverwinchdriveshaft,and

oldingwinchbrackettoradiatorshelland

port(fig. 36).

RODANDLIGHTWIRES.

screwson rightsideofradiator,holding

port(%-in.wrench),andinstall pin,holding

dtoshutter leveronlefttopside ofradiator

he2headlightblackoutlight wirestotheir

rator.Tightenallcapscrewsandbolts(%-in.

OUTLETHOSES(seefig.31forlocation).

NCH,socket,V2-in.

crewsholdingradiatoroutlet hoseatlower

atorconnection(screwdriver).Shellacgasket

andinstallthe2 capscrewsandlockwashers

ectiontooilcooler(V2-in.wrench).Shellac

water manifoldoutlet.Tightenhoseclamp

NOTE:Thelowerwaterhoseconnection

ghopeningof enginesupportbottomcover,

nplace.

PORTBOTTOMCOVER.

sedrainplugis tight.Installcoverand

ndlockwashersholdingengine supportbot-

rt(fig.97).

DERS.

kwashersand2capsscrewswithl ock

PublicDomain,

Google-d

igitized

/http://www.h


_use#pd-g

oogle


83/241

olRodConnectionatRadiator

ender.Install1 boltwithlockwasherand

hersholdingright frontfender.NOTE:

eftfrontfendertorear fenderalsoholdsthe

cableclip.

ESHAFTGUARD.

ENCH,3/4-in.(2)

thlockwashersholdingfrontendofguard

),2boltswithlockwashersholdingguardto

wrenches),and1 boltwithlockwasheron

nches)(fig.35).

edraincocks.Fillradiatorwithclean

Removepipeplugfromsideof thermostat

oruntilwaterruns outofholes.Replaceplug

crankcasewith11quartsofrecommended

ubricationchart.

PublicDomain,

Google-d

igitized

/http://www.h


_use#pd-g

oogle


84/241

S.

ENCH,open-end,V2.-in.

n.

datthis time.Removerockerarmcover,

dfollowprocedureoutlinedunderinjector

.

kallwires,fuelline,andcontrolsto be

edandtight,openvalveunderfueltank,and

etonllthesecondand thirdstagefuelfilters

ewithstartingmotor untilfuelpumpfills

tarts,checkallfuel,oil, andwaterconnec-

rsforleaks.Observefuelandoil pressure

eregisteringthecorrectpressures.Install

encoverbolts.

pipeandintopositionon cowlandradiator

ownboltsat eachcornerofhood.NOTE:The

ornerofhoodislocatedinside thebatterybox.

BLY.

kerarms foreachcylinder.The2

haustvalvesandthe centerrockerarmoper-

kerarmassemblyoperatesona separateshaft

AspecialV2-inchhollowcapscrewholdseach

d.Theremovalofthese2 capscrewspermits

dfromtheshaft andtheshaftremovedfrom

erarmsmaythenbe laidback,givingaccess

assemblies.Therockerarmassembliesmay

m personneliftheyarebrokenor worn.

Assembly.

1n.WRENCH,open-end,%6-in.

n.

n.

toparagraph66d(1)and figures70and

MCOVER.Unscrewthe2handscrewshold-

nderheadand liftoffcover.

CKNUTS.

n.

evisonpushrods(see fig.45forlocation)

PublicDomain,

Google-d

igitized

/http://www.h


_use#pd-g

oogle


85/241

ELLINES.

n.

ectorsatbothendsof linesandremove

ngcapson fittingsfromwhichlineswere

neRemoved

MBRACKETS.

holdingtherockerarmassemblyto cylinder

s(fig.49).

oveshaftbyslidingitoutof rockerarms

MASSEMBLIES.Unscrewclevisesfrompush

ms.

pen-end,%*-in.

ENCH,open-end,V2-in.

socket,%-in.

SONPUSHRODS.Screwthepushrods

PublicDomain,

Google-d

igitized

/http://www.h


_use#pd-g

oogle


86/241

pScrewsfromRockerShaftBrackets

o thattheendofthe rodisflushwith the

ftheclevis(fig.50).NOTE:Thisis very

mallclearancebetweenthevalveheadand

thepistonis atthetopof itsstroke.Itis

triketheheadofthe valve,resultingincon-

erarmisnot screweddownfarenough.The

ardenedballstud andballseatwhichform

HROCKERARMS.Iftheoriginalshaftis

he greatestevidenceofwearup.

BRACKETS.

haft,smoothsidetowardsrockerarms,

wsdownfirmly.As thebracketsaretightened

getherallowingonlyslightclearancebetween

ets.Atotalof 0.003-to0.006-inchclearance

RFUELLINES.

.

sandinstallthefuel lines.


/http://www.h



87/241

kerArm

ANCE,TIMEANDEQUALIZEINJECTOR.See

aranceadjustmentandparagraph66for

ing.

learanceisimportantbecauseofhigh

velopedinaDieselengine.Toolittleclearance

on,"missing,"andeventualburningofthe

omuchclearanceresultsinnoisyengine

veclearanceis0.010-inchatoperatingtem-

nceisadjustedbyturningthepush rodin

changesthelengthof therod.Turnthepush

valvelashclearance(lengthenrod),andto

nce(shortenrod).Followthesteps outlined

rancecorrectly.

6-in.

PENVALVE"POSITION.Rotatethe


/http://www.h



88/241

otoruntil theinjectorplungerisfully

rarmdown).

ETWEENROCKERARMANDPUSHROD.

pen-end,V2-in.

n.

ageandadjusteachpush roduntilthe

nthe valvestemandtherockerarm(fig.51).

ceAdjustment

.WRENCH,open-end,V2-in.

locknut.Checkagaintoseeif 0.010-inch

dbetweenthevalvestem androckerarm.

tonfeelergage.

eachcylinder.

orisofthe mechanical,flyball,orfly-

o controlengineidlingspeedandtolimit

nderthevariableloadrequirements.

ustedunnecessarilybecauseoffailureto

tiesinengine performancemayresultfrom


/http://www.h



89/241

reoftenaredueto othercauses.Agovernor

illseldomrequireattention;therefore,unwar-

governorismostvigorouslydiscouraged.

shouldnot attemptanyadjustmentor

nor.Allotherpossiblecausesofirregular

ldbeeliminatedfirst,andifthe governoris

e,reportit tothenexthigherauthority.

ANDMUFFLER.

eexhaustmanifoldisin onesection

headby4%6-inchstuds,nuts,and special

tedtothe manifoldwith4Vi-inchcapscrews

portedatfrontend byasupportstrapfrom

bawdy

sket.

muffler.

emanifold.

n.WRENCH,socket,3/4-in.,with

extension

AMP.

n.WRENCH,socket,%6-in.

amparoundmuffler.

WRENCH,socket,3/4-in.

holdingmufflertofront support(fig.52),

kelbowtomuffler,andthe 4capscrewsholding

fold(fig.53),and removemuffler.

withextension

ts holdingmanifoldtocylinderheadand

g. 54).

n.WRENCH,socket,y4-in,with

extension


/http://www.h



90/241

pScrewsfromMuffler

pScrewsfrom/MufflerElbow


/http://www.h



91/241

austManifoldandMufflerasOneUnit

nifoldand head.Removethenutsand

head andplacenewgasketsonstuds.Shellac

Placemanifoldonstudsandtighten allnuts

WRENCH,socket,*A-in.,with

thlockwashersthroughmufflerelbowand

AMP.

6-in.WRENCH,socket,%6-in.

erbody,installbolts,lockwashersandnuts,

TLETPIPE.

ckwashersholdingexhaustoutlet pipe


/http://www.h



92/241

..62

...63

s..............................67

......................69

sofa fuelsupplytank,sedimentsumps,

njectors.The120-gallonsupplytankis

umps,drains,andafuelshut-offvalve.The

assembly,ismountedonabracketbolted

derseat.Therearealsotwo otherfilters:

,fastenedonthe backsideofcowl,andthe

dto theengine.Thefuelpumpis boltedto

isdrivenby thelowerblowerrotorshaft.

S

agram

PublicDomain,

Google-d

igitized

/http://www.h


_use#pd-g

oogle


93/241

hebottomofthefuel tankandthrough

fuelpump.Thefuel isthenforced,under

throughthesecondandthird stagefuel

nifoldonthesideof thecylinderhead.From

,underpressure,to theinjectorsthrougha

dinthe injector.Thesurplusfuelleavesthe

porousbronzefilter,and returnsthroughthe

ldand fuelreturnlineto thefueltank.This

eloilhelpsto cooltheinjectors,warmsup

pocketsin thefuelsystem.

kislocatedat therearofthe tractor

U.S.standardgallons.Careshouldbetaken

el thatallhoses,funnels,orcontainersused

m enteringandcloggingthefuellinesand

thebottomof thetank(fig.56)are pro-

to drainout,withaminimumwasteof fuel,

ttles tothebottom.Dirtandwater will

hesesumpsandcanbe drainedout.Drain

uldbeopeneddaily,preferablyafterthe trac-

rmore,orovernight.In freezingweather,

rainthewaterfromthesedimentsumps and

nddamagedueto freezing.

shouldbedrainedandflushedoutperi-

wheneveranaccumulationofrustor dirtis

torshould beonlevelground.Removethe

etankand pourabout10gallonsof clean

tit drainout,flushingthedirt andrustwith

available,flushingmaybe donebyinserting

n thebottomofthetankwherethe sedi-

d.Usenewgasketsandshellacbothsidesof

sedimentsumpsbackonthe tank.

56).

mentsumps hasbeenexplainedinthe

H,socket,%6-in,with

fromtankinto cleancontainers.

PublicDomain,

Google-d

igitized

/http://www.h


_use#pd-g

oogle


94/241

imenfSumps

ove3capscrewsandlockwashersfrom

mentsumps.

ETS.Cleanoldgasketsofffueltankbefore

mps.

with

acbothsidesofgaskets,placeoneoneach

thcapscrewsandlockwashers.

offueloilthrough theinjectorsinthis

ctorscool.Thefuelpump circulatesapproxi-

er hourthroughtheinjectionsystem.Ifthis

easeandgettoo low,thereisapossibilityof

ctorsbecauseofoverheating.Asthefuel filters

ntityoffuelcirculatingthroughtheinjectors

PublicDomain,

Google-d

igitized

/http://www.h


_use#pd-g

oogle


95/241


96/241

ithinthenormalrangeand theoperation

ufficientfuelisbeing suppliedtotheinjectors,

ethetrouble:

nfuellines andfuelmanifoldcarrying

ee thatreturnfuelmanifoldandreturnfuel

tedinanyway.Tocheckthereturn flow,

dlookintotank.Whenthe engineisrunning

shouldbeanampleflowof fuelintothe

dinanypart offuelsystemasoutlined

ythattheporousbronzefilters inthe

heinjectorswill havetoberemoved.

alizetheinjectors,andadjustexhaust

d,66e,66 f,66g,and58 b).

bly.

Thefirststagefuel filterassemblycon-

rboltedtotheright rearfender.Afuelline

to thisassemblyandanotherleadsfromthe

.Acottonwoundfiltering elementisused

lFilterAssembly


/http://www.h



97/241

6-1n.WRENCH,open-end,3/4-in.

-in.WRENCH,open-end,%-in.

n.WRENCH,open-end,%-m.

tankanddisconnectthefuel linesfrom

offilterassembly.

mTractor.

6-in.

holdingbrackettoplateon fenderand

r.

n.

holdingfiltercupto clampringandremove

mcup(fig.58).

vethedirtyor cloggedelementandclean

fueloil.Replaceoldelementwithnewone.

eandirtyor cloggedelement.Itisnot

ntireassemblytoreplacefilterelementThe

ymerelyremovingthefiltercupfrom the

embly,leavingbalanceofassemblyinstalled

n.WRENCH,open-end,3/4-in.

6-in.WRENCH,open-end,7/8-in.

.

6-m.

ercupandsecurecup tofilterheadwith

hers.Usenewgasket.

ctor.

n.

onfenderwith2 capscrews.

lterAssembly.

n.WRENCH,open-end,%-in.

chend fittingoffilterassembly;open

elsupplytank,startengine,and inspect


/http://www.h




/http://www.h



99/241

tStageFuelFilterCup

FuelFilter


/http://www.h



100/241

.

Thisfilteris locatedbackofthecowl

ndsboltedtothecowl.Itis connected

etsideandto thethirdstagefuelfilter on

oundfilteringelementis usedinthisfilter.

-in.

n.

.

outletfuellines fromfilterheadfittings

gFuelLinefromSecondStageFuelFilter

wl.

n.WRENCH,socket,%e-in.

gfilter mountingbandstocowlandremove

.

n.


/http://www.h



101/241

FuelFilterDisassembled


/http://www.h



102/241

ds.

n.

mountingbandsandslidebandsoff filter

.Loosenandremovecoverhold-down

Liftoutfilterelement.

filtercaseoutwithcleanfueloil before

ethatdraincockis notclogged.Thisdrain

erydaytodrain sedimentandwateroutof

ementonly,thefilterassemblyshouldbe

and onlythehold-downclampandcover

n.

andSecureCover.Placenewfilter

wgasketbetweenbodyandcoverand

wnclampandscrew.

onFilter.Placebands onfilterandinstall

ngnutsloose.


n.WRENCH,socket,9/16-in.

MBLYONCOWL.Installboltsthrough

andstartnuts.Tightenmountingbandbolts

n.

ne,fillthe filterwithfuel(thiswill save

ertopumpfuelto fillfilter),andconnectout-

rtengineandcheckforleaks.

vingthesecondstagefuelfilter passes

stagefuelfiltertothe intakefuelmanifold

hird stagefuelfilteralsois ofthereplaceable


/http://www.h



103/241

elFilterDisassembled


/http://www.h



104/241

.

n

n.

omthefittingson thefilterhead(fig.64).

rain filterbyopeningdraincockat

.64).

ewholdingfiltercasetofilterhead and

rdStageFuelFilterCase

ingheadtocylinderheadand liftofffilter

.Liftoutelementandspringfrom filter


/http://www.h



105/241

rdStageFuelFilterElement

eanfuel oilafterremovingtheelement

placedwithoutremovingthefilter assem-

ovingthe retainingscrewwhichwillallow

beremoved(figs.64and65).Use new

newelement.Fillcasewithfueloil before

d.

odrain sedimentandwaterfromfilter.

n.

n.

erheadwith2 capscrews.

Install thespringandnewcartridgein

ed"TOP"up,and fillthecasewithfuel.

bletypesoffiltercartridgesaresuppliedfor

filter.O,neisa cottonwoundtypesimilarto


/http://www.h



106/241

thefilterslocatedundertheseat.A steel

chofthese cartridges,andwhenthistype

ashershould beplacedonthehollowstud

he gasketandfilterareinstalled.

headandontopof element;installretain-

pto head(fig.65).

.

outletlines tothefilterheadfitting.

mpisa positivedisplacement,vane-

herearend coveroftheblowerandis

rotorshaft. AU-shapedsteelstamping

ssemblyandprovidesasafetyreleaseifthe

ause.

CH,open-end,7/8-in.

RENCH,waterpump

F.

ESFROMPUMP.


tlinesfrompumpfittings (fig.66).CAU-

doesnot comeoutbeforethenutto prevent

ROMBLOWER.

RENCH,fuelpump

holdingfuelpumpto blower.Usethespecial

screwnearestthecylinderblock(fig.67).

emblyanddrivecouplingforkasa unit

enancewillbeattemptedbytheusing

ENCH,specialfuelpump

.


/http://www.h



107/241

gFuelLinesfromFuelPump

pScrewsfromFuelPumpwith


/http://www.h



108/241

elPump

ORKONPUMP.Putdrivecouplingfork(arms

endofthepumpshaft.Usea newpapergasket

e.

ENCH,specialfuelpump

heblowerend housing,engagingthedrive

ngplateon thelowerblowerrotorshaft.

nthepumpbodyshould beonthecylinder

e fromthefuelsupplytankconnectedtothe

hepumpbody.

TOPUMP.

ellinesto fuelpumpfittings.

.Startengineandcheckforleaksandfuel

bustion,asmallquantityofaccurately

fuelmustbemixed,neartheend ofthecom-

hargeofair whichhasbeenforcedintothe

sis accomplishedbyaninjectorwhichisa


/http://www.h



109/241

ndevice.Thereisone injectorforeachcylinder.

eenginearecalled "unitinjectors"because

ectionpumpandinjectionnozzleor valve.

npumpis threefold:tometerouttheexact

iedtoeachcylinder,toputthat fuelundera

sureproperatomizationor breakingupofthe

t isreleasedintothe highlyheatedairof

injectionatexactlytherightpointin the

tionofaninjectionvalveisto seethatnofuel

until itisat ahighenoughpressureto

ignition,andthatinjectionstopsas soonas

helowestpermissibleinjectionpressure.These

theunitinjectorfor eachcylinderofthis

thiscombinedpumpandinjectorunitishere

e mountedinthecylinderheadwiththeir

ybelowtheheadinto thecombustioncham-

ecylinderhead,holds theinjectorinplacein

beinthehead.Adowelpin intheinjectorbody

ecylinderheadforaccuratelylocatingthe

seatonthelower endoftheinjector,when

n thecylinderhead,formsasealagainstthe

oninthecylinder.

risoperatedbyapush rodandrocker

theexhaustvalves.Asthepistonnearsthe

ke,therockerarmforcesthe injectorplunger

the plungerintothecombustionchamber

ctorspraytip.Theseholes,only0.006inch in

elandbreakit intoaveryfinespray.A faulty

n alossofpower,unevenoperationofthe

smoke.Injectorscanbecut-outin muchthe

outsparkplugs onagasolineengine.With

rremovedandenginerunningat about%

oratatime bypushingdownontheinjector

kofwoodabout V2inchsquare(damage

verisused).Theonethatseemsto haveno

heengine whencut-outwillbethefaulty

vedanda neworrebuiltinjectorinstalled.

WRENCH,socket,%6-in.

n.WRENCH,socket,%-in.

6-in.


/http://www.h



110/241

ofInjector

entheboltsonthehoodhold-downstraps

odandpryboltsout ofslot.Removenutfrom

x,andremovethe hood(figs.70and71).

MCOVER.Cleantherockerarmcoverthor-

overbylooseningthe2 handscrewsthathold


/http://www.h



111/241

fromHoodBoltInsideBatteryBox

od


/http://www.h



112/241

n.

ftheinjectorto beremovedandplace

tings topreventdirtfromenteringthe fuel

MBRACKETS.

movethe2hollowcapscrewsthat hold

othehead andslidethebracketsoffthe

MSHAFT.Slideshaftfromtherockerarms

ybackoutofthe way.Thisshouldbedoneto

s.

AMP.

orclampandliftoffclampwasherand

orremovertoolundershoulderof injector

ts seat;atthesametimedisengagethe

74and75).

ctorClampNut


/http://www.h



113/241

ctorClomp

val


/http://www.h



114/241

ved

n.

NTHEINJECTORTUBE.Adowel,provided

erswitha holeinthecylinderheadso that

inonly onepositioninthehead.Engagethe

olleveratthe sametime.

RCLAMP.

.

rbody,centeringthesidearms ofthe

themachinedrecessesintheinjectorbody.

verthestud withroundedsidedown.Put

nclampfirmly,usingwrenchwith8-inch

SHAFTANDBRACKETS.

armsandplacea bracketoneachendof

eofbracketstowardrockerarms.Install cap

downfirmly,atthesametimeholding

lyagainstrockerarms,allowingabout0.006-


/http://www.h



115/241

n.

sfromfuelfittingsin headandoninjectors

erenginehasbeenstarted,checkforleaks

mcover.NOTE:Theinjectormustbetimed

eclearanceadjusted(par.58)beforethe

dareinstalled.

nd 78).Thetimingofaninjectorcon-

etop oftheinjectorplungerfollowerin

ywhenit isatthetop ofitsstroke.This

daspecial toolcalledatiminggage(in the

to maketheproperadjustment.After

orif therockerarmassemblyhasbeen

mustalwaysbetimedandequalizedbefore

efollowingprocedureshouldbeused to

pen-end,%6-in.

NCH,open-end,V2-in.

TO"OFF"POSITION.Donotallowthe

newiththe startingmotoruntiltheexhaust

hichtheinjector istobetimed arefully

armshavedepressedtheexhaustvalves,the

OSITION(fig.77).

VER,small

e timingholeintheinjectorbody.The

uldbeturned totheleftas faraspossible.

a firmdownwardpressureonasmallscrew-

inthetopof thetiminggageshaft.Make

tthe lowerendofthetiming gageshaftrests

gGage


/http://www.h



116/241

g

dyandis notrestingonthecoppergasket

ntheinjector.

NG.

totheright untilthelowershoulderofthe

eedgeof thefollowerguide.Ifthetop of

e notflushandthemarks"C"on thesleeve

hepushrodmust belengthenedorshortened

ment.

78).

1n.WRENCH,open-end,V2-in.

pushrod.Adjusttherockerarmby

erighttoshortenit, whichwillallowthe

ocomeup.Turningthepush rodtotheleft

andwillpushtheplunger followerguide

rkslineup,with asmallallowancefora

swhenthelocknutis tightened,thesleeve

hetopofthetiming shaft.Tightenthelock

mingmarksshouldnowbeexactlyin line


/http://www.h



117/241

getheadjustmentslightlyuntilthe marks

stight.

gofInjector

operationconsistsofproperlyadjust-

sto obtainanequalfuelinjectionfromeach

oftheinjectorsisessentialbeforetheyare

stbe-timedandequalizedeverytimeany

edonwhichmightaffectthepositionofthe

mbly.Equalizingisaccomplishedbythefol-


/http://www.h



118/241

FORWARD(OPEN).Pushfuelshut-offall

rottleback(open) asfaraspossible.

CREWS.

sonthecontrolrackleversand besure

controltubeandthatthe controltuberotates

NORCONTROLLINK.

ernorcontrollinkandcontroltube lever.

ouldmovefreelyandtheinjectorcontrol

rntothe "NOINJECTION"positionwhen

disconnected.

LRACKANDGEARCLEARANCE.

thetopofthegovernorin fullloadposi-

ustingscrewforNo.1injectorin untilthe

roltubeleveris ^inchoutof linewiththe

ollink (figs.79and80).Turnthe upper

tightenbothscrewslightlyso thatthe%4-

.

ackAdjustment


/http://www.h



119/241

ControlRackandGear

ACKCONTROLLEVERS.HoldNo.1rack

njectorcontrolrackin its"IN"positionand

controlleversuntilthe lugsonallrack

theinnerfacesofthe slotsintheinjector

Theadjustingscrewswillbedamagedif

e justscreweddownfirmly,theywill

CONTROLLINK.

rcontrollinkandcontroltubelever,and

allrockerarmcover,startengine,and test

n.

securewithbolts andnuts.

NECTIONS.

ectionsshouldbeinspectedregularlyand

epartsremovedforrepairorreplacedwith

e steeltubing,anditis importanttoavoid

tholdthe fuellinestothe tractortrans-

gineshouldbetight.Practicallyallthefuel


/http://www.h



120/241

nectornutsrequiringa7/8-inchopen-end

nnectionisbroken,theengineshouldbe

nnectedagainandinspectionmadefor

uelpressuredueto airbeingdrawninto

efectiveorloose connection.

lipsholdingfuellines topartsofthe

the properplaceswhenlinesarereplaced.

ageoflinesfromvibration.Alwaysusea

onnectingordisconnectingfuellines.

precleaner,modelC-11215,isofthe

tely85percentofthe dirtenteringwithairis

r reachestheoilbathair cleaner.Aglass

syforthe operatortoobservethequantity

compartment,andenableshimtodetermine

mptiedfrom theprecleaner.Ifprecleaner

uldbeimmediatelyreplaced.

6-in.(2)

ofprecleanerandlift offprecleanerassem-

eanershouldbeemptieddaily,oroftener,

Precleaner


/http://www.h



121/241

tm 9-783b medium tractor m1 (allis-chalmers hd-7w), 1942

Documents