TM 5-3014 CASE SI AIRBORNE TRACTOR WITH HOUGH LOADER BUCKET 1944

8/13/2019 TM 5-3014 CASE SI AIRBORNE TRACTOR WITH HOUGH LOADER BUCKET 1944

1/313

NICALMANUAL

BERTIRED,

TANDARD,

ITH

KET.

ONSANDPARTSCATALOG

UARY1944

Publ

icDomain,Google-digitized

/http://www.h

athitrust.org/access_

use#pd-google


2/313

ManualandParts

"SI",published

y,isfurnishedforthe

ofallconcerned.

PublicDomain,Google-digitized

/http://www.h


use#pd-google


3/313

tW-145AEng.514

705780

706837

706848

706860

706868

706871

706873

706876

709562

709568

709581-582

709590


/http://www.h


use#pd-google


4/313

tW-1088Eng.2159

tW-1088Eng.2163

tW-1088Eng.2461

o4714397Incl.

tW-1088Eng.2632

dup

tW-11-032Eng.(MSP)-8

dup


/http://www.h


use#pd-google


5/313

S

CE

ANCES

VICEDATAfl

ONS


/http://www.h


use#pd-google


6/313

ceInstructions

Tractor

stment99

dle105

ent26,87

y90

erInstalling90

bly87

8

the58

ingSystem17

61

ions20

actor63

8

,58

8,19

65

e69

39


/http://www.h


use#pd-google


7/313


8/313

Tractor

Front91 108

g614

Magneto6179

ceMiddleRing87104

rFreeOperation4673

873

44

245

2

102

embly7492

mentof1226

mentof1125

391

5

paratorytoDriving5275

80

974

362

rting3262

2955

98

g4271

gScrew4171

g4372

of6883

ectingRodsandPistons,Detailsof.1842

sembly2449

ve,Details2550

chroscope5475

ng6078

5978

ingNut5877

Plate 5576


/http://www.h


use#pd-google


9/313

ame

ine

ringPosition,

chroscope

uiredtoService

ontact

f

ng

ting

tailsof

ff

earOff

oving

acing

ReverseIdlerGear


/http://www.h


use#pd-google


10/313PublicDomain,Google-digitized

/http://www.h


use#pd-google



/http://www.h


use#pd-google


14/313

NSS.MyRule.

rneTractorwhichyouareoperatingwasde-

ecificjobforyourArmy.Theprimaryconsideration

ddependabilitywitha minimumofweight.

nyyears,builtareputationfor dependableand

ntheAgriculturalfieldandforHighwayandIndustry

esall thesefeatureswhichhavemadepossiblelong,

therwithlatestengineeringknowledgeanddesign.

htenoughin weighttobehandledeasilyby

able,valve-in-headCasebuiltengineassuresapower

hrough.Thetransmissionisthesametime-proven

aldriveforbestperformance.

chdayof operationbecausetheModel'SI'is

jobandeasierto operateonceitisin use.Routine

onhasbeensimplified.Thereareonly afewpoints

egun. Thepacklesswaterpumpwithsealedball

lcare.Batteryismountedoverthe clutchhousing

ssible.

someansmoreworkdone.Gaugesandcontrols

tobservationandoperation.Clutchandbrakepedals

eofthelatesttype,operatingindividuallyorlocked

entdamageto thetractor,thefollowingsafety

tall times:

athighspeed.Usebrakesfor turningonlyat

onwhentravelingonhillsidesor overroughground.

actorwhileit isinmotion.

duallywhenstartingthe tractorsothattheload will

Thisis particularlytruewhenthetractorisgoing up

tofabogor ditchorhitchedtoa heavyload.When

tions,theoperatormustbepreparedto disen-

yifthefront wheelsraiseofftheground.

ouldneverbeoperatedwithoutproperguards.

dtelescopingshieldstocovertherevolvingshaft

venmachinemustbesecurelymountedinplace.

mentismountedonthefrontof thetractor,whenit

theengine,this mustbedonethroughthefirst

tside ofthetractor.

nualcarefully.


/http://www.h


use#pd-google


15/313

with HoodRemoved

okeEnd6.

d


/http://www.h


use#pd-google


16/313

NSSpecifications

ONSANDSERVICEDATA

CTORS

.7 Imp.gal.,53liters

al.,3.5I mp.gal.,15.2liters

,1.12Imp.gal.,4.64liters

al9gal.,7.5Imp.gal.,34.1liters.

nch

-1

26lbs.(1550R.P.M.)

.M.

M.

nchwhenwarm

J7)No.18 Venturi.

11inchdiameter.

nforwardandreverse.Mountedondifferential

er.

h12.00-24tires)

?T>TUT

P.M.

R.P.M.

peed)541R.P.M.

Spline)1}4inch

Kinch

actor.

toronlywithoutadaptingequipment)

nch

%inch

wheel-56%inch

74inch

Kinch

h

bs.(tractoronly)(Completewithwater,oil

062lbs.(Tractorlesswater,oil andgasoline).


/http://www.h


use#pd-google


17/313

orwithHoodRemoved

Cap11.

eControlRod14.

Wire

g

g

able


/http://www.h


use#pd-google


18/313

NSPreparingNewTractor

TORFORUSE

stedandthoroughlyinspectedbeforebeingshipped

gly recommendedthattheoperatormakeacareful

einbeforeputtingthetractorin service.

rusingtheLubricationChartFig.8 asaguide.

enginecrankcasebyremovingtheoilplugsNo.13

de ofengine.Theoillevelshouldbe betweenthe

is notrunning.

ircleanercuptoseethat itisfilled tothelevel

e baffle.Fig.9.

ransmissionanddifferentialcaseandbesureit is

evelplugonthe reartransmissioncover.

ne,removethesparkplugs andpourasmall

chcylinder.Replacethesparkplugsandcrankthe

stodistributeoiloverthe cylinderwalls.Thisassures

stonsandcylindersimmediatelyaftertheengine

cessaryonlyfora newengine,oranenginethat has

monthormore).

velswiththeenginerunning.

dfromthefactorywithoutoilin thecrankcase.Beforea

quartsof agoodgradeofoil havingaviscosityof

put inthecrankcase.Inadditiontothis, forthe

t oflightoilto eachfivegallonsoffuel.Afterthe

unin, discontinuetheuseoflightoil inthefuel,but

nkcaseincoldweather.

eshouldneverbestartedtofacilitateunloadingor runeven

crankcaseisfilled totheproperlevelwitha good

ecoolingsystemisfilledto capacity.Thispractice

eengineandmustbe prohibited.

edtostandfora considerablelengthoftime,oil

ts,causingthemto sweatandrust.Theymayseize

beforethe engineobtainssufficientlubrication.This

weather.

gsystemis4 gallons.

helowerradiatorpipelocatedon theleftsideof

softwater.When thetractorisoperatedin

F.or0 Cent,orlower),anti-freezesolutionsmustbe

ctorisgravityflow.

14U.S.gallons.

underthefueltank andfilltankwithgaso-

w,add apintoflight oiltoeachfivegallonsof fuel.

operateongasolinehavingaminimumratingof65

mperformance,ahighgradeoffuelshouldbeused.


/http://www.h


use#pd-google


19/313

.

erCap15.

ent inthefueltankcap iskeptopenatall times

fuel.

eltankwhennearan openflameorwhenthetractorengine

9 atbottomofthecarburetorandturn onthe

solinetorunthroughtoclean outthefuellineand

ethedraincock.

ONCABLES

he toolbox.Checksparkpluggaps.They

essary,adjustthe sparkplugpointsbybendingthe

empttobendthecenterelectrode.Alwaysusethe

heninstallingorremovingsparkplugs.Makecertain

sare inplacetoforma gas-tightseal.


/http://www.h


use#pd-google


20/313

NSSurringEngine

ineis1-3-4-2.No.1sparkplug isnearthefront

ctthecablefromtheNo.1 outletofthemagnetodis-

houldbeattachedtoNo.2 cylinder,etc.

edtoassurerigid blockinginshipment.

or,eventounload,deflatetires

allowedtodropbelowtheserecommendations.

gularlyonceaweekwithan accuratelowpressure

e andscrewedtighttopreventmud,graveland

amagingthevalvecore,alsoto preventthelossofair.

lconnectionsareproperlymade.

batteryareproperlycoveredwithliquid.Ifnot,

rain water.Fig.6.

eachcellin thebattery.Thefullchargegravity

5at80 degreesF.Inservice,thegravityshouldbe be-

argegravity.Withnormal use,thegeneratorshould

e1.250.

gearshiftleverin theneutralposition.Fig.5.

eedlevalveNo.2 Fig.92turns counter-clockwise

ataboutmid-position.Pullingbackopensthe

ginetooperateat higherspeed.

nition,bypullingout switchhandle,crankthe

ndmakesurethat theimpulseisworkingfreely.

to^of itsfulltravel,whenstartinga colden-

up,push thechokeingradually.Nospecificpoint

thiswillvaryslightly.Do notchoketheenginetoo

"flood".Ifthe engineiswarm,itis besttotrystart-

eat all.Floodingisusuallydueto excessivechoking

turningoffignitionswitchwiththethrottlefully open.

hetractor Fig.73toprotecttheoperator.

starts,checkoilpressuregaugeNo.11Fig.5 to

essure.Ifitis not,stoptheengineandinspectthe oil

of thisfailure.


/http://www.h


use#pd-google


21/313

attery

eryto StartingMotor

atterytoGround

ngVibration

atterytoTransmissionCase


/http://www.h


use#pd-google


22/313

NS

epresstheclutchpedal andshiftintotheroad

nsforthedifferentspeedsare showninFig.7.When

upthe enginewiththefootacceleratorandengagethe

releasingthepressureonthe clutchpedal.Donot

ythusallowingthetractorto jerkintotheload.

ependsentirelyonthe loadandgroundconditions.

lstopwiththeteethoppositeeachother andthereby

ouldthisoccur,partlyengagetheclutchandallow

Theteeth willthenmeshreadily.Thiscondition

henthetractorisnew.

perhourforthis tractorequippedwith12.00-24

operatingat1550R.P.M. isasfollows:

tractorwithyourfoot restingontheclutchpedal.This

heclutchfacingsand throwoutbearings.

essingdownfirmlyonthe clutchpedalandmove

tralposition.Itisrecommendedthattheenginebe

ngagingtheclutchandthenapplyingthebrakesto

tractor.If thetractoristoremain standingfora

bletolockthefootbrake.

etelybypushingthethrottlelever forward,thus

,thenturnoffignition switch.

fueltankshut-offvalveifthe tractoristoremain

.


/http://www.h


use#pd-google


23/313

R'SINSTRUCTIONS

hdifferentialor turningbrakesNo.14and15,

ndependentlytoassistinturning,lockedtogetheras

ckedasa parkingbrake.

y,operatorshouldnotattempttosteerthe tractor

yareto onlyassistinturning.It istherefore,neces-

,to turnthesteeringwheelin thedesireddirection

s applied.

edsor withloadsonhighways,thebrakepedals

.Thisisdone byengagingtheBrakePedalLockPin

brakepedalNo.15 Fig.5inthe holeintheleft-hand

andlocking.Whenstoppingaheavyrollingload

ottle theenginedownbeforeapplyingthebrakes.

onoftheenginewillslowdowntheload andreduce

kesandbrakelinings.

nglockNo.13 Fig.5,thebrakescanbe locked

ke.

tooperationby pushingthepowertake-offshif-

mentpanelwiththeclutchdisengaged.Thepower

rtedbymeansof themaintractorclutch.

A.S.A. E.standard1?4inchsplineand operates

enginespeedof 1550R.P.M.Thespeedof the

rectproportionto thespeedoftheengine,regardless

actorisoperated.

.


/http://www.h


use#pd-google


24/313

NSLubrication

ingSystem

gsystembuiltintothis engineassurespositive

arts.Agear typeoilpumpcirculatesoilthrough

ntheengineblocktoallmain,connectingrodandcam-

erarmsandgovernor.Allotherpartsoperatein an

odbearings.Valveliftersareflood lubricated.

ndthrowout collararealsopressurelubricatedfrom

ontheoil pumpscreenshouldberemovedand

willmakecertainthattheoil deliveredtothebearings

throughthescreen.Finelyfinishedbearingsurfaces

nthe oilandremovethethreecapscrewsFig. 3.

enbe withdrawnasaunit.Usecareto protectthe

ofgasolinetoremoveall dirt,waterandother

horoughly.

heengine,inspecttheinteriorof thecrankcase

r dirtthatmayhavecollected.

htencapscrewssecurely.FillthecrankcaseFig.4

thefirsthour orsoofoperationobservecarefully

arepresent.

withanon-adjustablereliefvalve.Thisvalveis

dspressureonthe oilgaugewhentheoil andthebear-

.

ngine,the pressuremaygraduallydecreasedue

einthebearings.Thepressureshould neverbeallowed

normalenginespeedwithoutinvestigatingcauseand

ytoproperlysupplythe enginemayfailbecauseof

ncrankcaseandfreezingaround.thescreenwhen

e.

overFig.4 shouldberemovedandinspected

tanydirt thatmayhaveaccumulatedinthepipe.A

snecessarytoobtaintheproperbreathingaction.

kcaseis5 quarts(U.S.Measure).After128

ethecrankcasedrainplugandclutchhousingdrain

whentheengineis hotanddrainoutall oil.Fill

o.11Fig.4.


/http://www.h


use#pd-google


25/313

eModel"SI"AirBorneTractor

LocatedonPlateonInstrumentPanel

eGrade

versal

pose

poseNo.2

56

rCaseModel'SI' AirBorneTractor


/http://www.h


use#pd-google


26/313

NS

bricantstobeUsed

perature

ationandServiceInstructionsonIndividual

elubricantgun.

ilcupandremovebaffle.Cleanthoroughlyandre-

E.Under dustyconditions,cleanandrefillmore

stight.Seepages23and 47forfurtherinfor-

eandcleanthoroughly.

fill tolevelofupperlevel plug.Every128hours

seandclutchhousing,whenengineishot,then

eetable.Caution:Whenrunningengine,be

atesoilis circulating.

e,cleanandreplace.Seepage17 forfullinstructions.

tial

evelwithtractoron levelgroundandaddlubricant

g,drainimmediatelyafteroperation.

e,washingasolineand addOE.

ndrepackbearings.

singwhen completelydrainingcrankcase.

eclutchandbrakelinkage,throttleand governor

ation

utchreleasebearing,steeringgear,governor,power

rodballandsocket,enginevalverockerarms.


/http://www.h


use#pd-google


27/313

STRUCTIONS

dbe maintainedtothelevelofthe topplug,nc

ediftheengineis operatedwiththelevelslightlybe-

ocircumstancesshoulditbeoperatediftheoil level

DATIONS

yofOil

perature.

ERENTIAL

ndbearingsinthe transmissionanddifferential

edinoil.Thecasei scompletelysealed,andtheonly

cantis throughcarelessfilling.Theoilusedis ofsuch

itmayremainsuspendedduetothe continuoussurg-

earsand chains.Thisgrittyoilwill causerapidwear

parts.

OMMENDATIONS

9gallonsU.S.Measure

y

missioncaseshouldbe drained,flushedandrefilled.

er

missioncasetopcovershould beremovedandin-

Rinseitout ingasoline,thendipin engineoil.

ON

repackedwithgreaseat thefactoryand,under

uirenoattentionforthe first256hoursofoperation.

beremoved,cleanedthoroughlyandrepackedwitha

Thisshould berepeatedevery256hoursthereafter.

sareprovidedwhereverautomaticlubrication

dgradeofsemi-fluidpressuregun lubricantshouldbe

warmweather.Incoldweathera lightergradeoflubri-

proper lubricationofthebearingsurfaces.Wipethe

oreusingthegreasegun.


/http://www.h


use#pd-google


28/313

NScburtor

CE

dlubricatingthe tractoraspreviouslyindicated,

esitwillbenecessaryfortheoperatorto makeminor

irs.Alltheadjustmentsdiscussedinthe remainder

onsectioncanbemadebythe operatorwiththe

.It issuggestedthatotherservicingbe lefttofield

hetractorreturnedtoabase forcompleteoverhaul.

stractoris easilyadjustedandonceproperlyset,

nlythreeadjustmentsareprovided IdlingSpeed

in Jet.Allcarburetorsaresensitive,souse carein

andidlemixturecan bestbemadetogetherand

ginewarm.The throttleleverontheseat mounting

ayforwardbeforemakingthe adjustment.Theidling

houldbeadjustedsothatthe enginewillidlefast

.Thenturnthe idlingjetadjustingscrewNo.1

gineruns smoothly.

hisadjustmentisonefull turnfromtheidling

ethecorrectsettingisusuallybetweenYJ, and1'4turns

madewhentheengineis warmandworkingun-

he greatestinfluenceunderthoseconditions.Turn-

wardprovidesaleaner mixture,whileturningout-

xture.

the enginestartstomissor powerfallsoff.

operoperationis secured about]/&ofaturn isusual-

llassuremaximumfueleconomywithverynearly

ththeoriginal setting,makeanapproximate

mainjet valveinwarduntiltheneedlejust seats.

ethepointagainsttheseatas thismayruintheseat.

dtwofull turns.Thissettingissufficientlycloseso

rateduntil finaladjustmentismade.

hroughthe carburetorindicatesthemixtureis

evidentwhenthe engineisacceleratedbypulling

Anoverlyrichmixtureisindicatedbysluggish action

ppearanceofblacksmokeattheexhaust.Thefinal

aspossibleandstill havesatisfactoryengineoperation

assemblyandRepairofCarburetorisdiscussed

ctionsonpage39.

urbthe functioningofthecarburetoronthis

thefuel.


/http://www.h


use#pd-google


29/313

ShowingDetailsofAirCleanerandCarburetor

w

t

s


/http://www.h


use#pd-google


30/313

NSAirde.

nkshouldbeinspectedandcleanedatleast once

ek)underordinaryconditions.Shutoff thefuelsupply

ringclip andunscrewtheglasssedimentbowl.Clean

eringtothe filterdisksbyunscrewingthefilter ele-

angasoline.Cleanthebowlandreassemble.Incold

oricethatmaycollectin thebowl.

preventtroubledue tocloggingofthefilter.

allytroublesomebecauseitmaynotbecompletelyre-

ionallyopenthedrainvalveNo.3 Fig.9inthe bot-

sothat anywaterandforeignmaterialwilldrainout.

ingoftheoil-bathair cleanerisimperativewhen

onditions.Inextremelydustyconditions,morefre-

ry.

leanerFig.9,it isnecessarytoloosenthebail

totheaircleanerbodyand removethecup,in-

baffle(7) mustberemovedfromthecupin orderto

t accumulateinthecup.Cleanallforeignmatter

ebaffleclean.Replacethebaffleandfill thecupwith

engineoiltothelevelindicatedonthe insideofthe

ainthat thegasketissmoothwithinthelower flange

upandbaffleas aunit.Lockthemintoplaceby

ndinwarduntilit snapsintoplace.Seepage47.

ECTIONS

g.9,shouldbekept air-tight.Otherwise,

anerwillbedefeated.Besurehosebetweentheair

roperlyinstalledandhoseclamps(5) Fig.9kept

earwillresultifthere areleaksbetweentheaircleaner

emanifold.

istractorareofthe 14m.m.threadsize,AC

quivalent.Shanklengthshouldbe^iinch.Agap of

inedbetweentheelectrodes.Ifthegap betweenthe

to inpropersettingorburning,thespark mayjump

sultinginmisfiring.Therefore,iti sveryimportant

edproperly.

ssingtheprobablecauseisfailureof theignition

asyoucranktheengineslowly,noticethe compres-

lt.Sometimesavalvesticksopen,whichalwayscauses

compressionissatisfactory,replacethesparkplug

malivecylinder.If thecylinderthenfires,thetrouble

arkplug.

enced,examineallwiresleadingto theplugsand

condition.Whenremovingorinstallingsparkplugs,

nchfurnishedwiththetools,rather thanpliers,open

blewrench,topreventdamagetothe porcelain.A

essitatereplacementoftheplug.

areofmagneto,starter,generator,batteryand

enanceInstructionspage65.


/http://www.h


use#pd-google


31/313

ump.ArrowsIndicateDirectionofFlowofWater

ley

gsystemis4 U.S.gallons.Animpellertypepump

ecrankshaftforcesthecoolingsolutionthroughthe

enginehead.Athermostat,openingat160F.auto-

.


/http://www.h


use#pd-google


32/313

NS

onthefanhub. Fig.10.Totighten,turnthe

hedirectioninwhichthe bladesturn.Thetension

akeupanyloosenessorslackin thebelt.Havingthe

pid beltwear,excessiveloadonthebearingsanddoes

adjustedbeltcan easilybedepressedaninchwith-

hebelt,tightenhexagonnuts.

emadeby looseningthegeneratorandswinging

tensionisobtained.

beinstalledbylooseningtheadjustablepulley

ndslipping onthenewbelt.It isnecessarytoremove

provideclearancebetweenthegeneratorpulleyandthe

ningtheCoolingSystemis giveninthesec-

onsonpage58.

ssedinthe Operator'sInstructionsunderCold

e32.

dwaterintoahotenginein whichthewaterhasbeenal-

.Todoso mayresultincrackingthecylinder

isnecessarytopourwarmwaterinto acolden-

,add thewaterslowly.Toorapidpouringmay

ctorisaspringloaded,dry disk,singleplate,foot

e verylittleattentionexceptforoccasionaladjust-

ormalwearofthefacings.Whenslippageis noted,as

pwithoutpickingup theload,immediateadjustment

damageto clutchfacings.

ee

al


/http://www.h


use#pd-google


33/313

chpedalmustbemaintainedandcan beadjusted

kplugwirestoavoidany possibilityoftheen-

gontheclutch.

ClutchPedalshownas1'

m


/http://www.h


use#pd-google


34/313

NSClutchinJB,,ke.

,thefootpedal shouldhaveoneinchfreemovement

e rearaxlehousing.Fig.12.

9mustnot beincontactwithclutchfinger.This

ingtheleft-handclutchhandholeplate.

nnectionsoas toprovide}& inchclearancebetween

ngshownasl/%"in Fig.69.Thisisaccomplished

sattheclutchleverand unscrewingittogivethe

ure locknutbehindclevisisturneddownse-

ect,thefootpedalcanbe depressedaboutan

ngcontactsthefingers.Bydepressingpedal

adilybe felt.

hefingersgetcloser tothrowoutbearingandclear-

edup.Thelength ofthefootpedalconnection

oreclearanceisentirelyusedup.

assembledbeforeitwas putintothetractor.It is

rto theextentofy&inchwear allowanceonthe

chplate.Aftertheclutchplate hasworn},iof

ced.Whenthisamountofwearhastakenplace,

facingstoclutchplatehavecomeincontactwith

d thepressureplateonthe other.

ovingClutchAssemblyandInstallingClutch

risincludedinMaintenanceInstructions

keis tostopthefirst reductionshaftfromrevolv-

gagedfor shiftinggears.Correctadjustmentmakes

djusted,inspecttheclutchbrakeshoe Fig.73to

theclutchbrakesleevewhen theclutchisdisengaged.

dmakesurethat thebrakeshoedoesnotcontact

heproperclearancewhentheclutchisengagedis y&

bymeansof theadjustingscrewFig.73.Turningthe

sthe clearance.Aftertheproperadjustmentisse-

crewbytighteningthelocknut.

hdisk typebrakesmountedonthesidegears of

propercareandreasonableusage,theywill givevery

e,footbrakeswillrequireadjustmenttocompensate

rm onthebrakeactuatingleverstrikesstop3 Fig.

stthebrakes.Thisadjustmentmaybeeasilymade,

ebrake,byfollowingthesesteps:

.

akehousingarethreecapscrews(1), Fig.13.Loosen

ralturns.


/http://www.h


use#pd-google


35/313

(2) clockwise,therebyscrewingadjustingnng

dforcingthe powerplateinward.Thisaction

ard,anddecreasesclearanceatthebrake

headjustingpinion (2)untilthebrakepedal

about1>"to 2".Thisshouldleaveadequate

ebrakewillnot dragwhenreleased.

tissecured,depressbrakepedaland lockit.Then

ws(1)to locktheinternalbrakepartsin place.

adjustingpinion(2)asthe adjustingringwith

preventedfromturningwhenthe capscrewsare

brakeon theoppositesideofthe tractor.The

alizedonbothsides,so thateachpedalwillbe depress-

brakeapplication.

havebeenmade,itmaybecomenecessarytore-

se,replaceentiremiddle brakeringcompletewith

dis notadvisable.Seepage105.


/http://www.h


use#pd-google


36/313

NSRubberTire.

tractorsleavethefactory,all tiresareinflatedto

0pounds.Thisis donetopreventbouncingofthe

kalltireinflationsandsee thatthefrontwheels

eand therearwheels12pounds.If heavyequipment

ofthetractor,the airpressuremustalsobe increased

RESFORCASE'SI'AIRBORNETRACTOR

nds

ds

8pounds

nds

nds

2pounds

theywillbeusedfor drawbarwork,suchaspulling

.Ifequipmentsuchas loadersordiggersaremounted

t apply.

les:

essuresspecifiedinthe precedingtable.

valvestems.

si nthecasingpromptlytopreventdamagefrom

abric.

reartiresis12 lbs.,exceptwhenweightisadded.

bs. pressure(only2lbs.undernormal,but actually

emay bucklewhensubjectedtoheavydrawbarloads.

hecasing,requiringanexcessivereplacementexpense.

ressureswillnot materiallyincreasetraction,and

eencasingandrimonheavydrawbarloads,resulting

m.

nflationpressuresspecifiedintheprecedingtable.

naccurategaugeeveryotherweekunlessyoufind

dualoperatingconditionsthepressurewill bemain-

nflationpressuresdecreasewhenthetractoris idleas

g,sobesuretorecheckthepressuresafter thetractor

etime.

operatetractorswithunderinflatedtiresthanit is

torvehiclewithtire pressurestoolow.

importantfunctioninmaintainingproperin-

vetwomainpurposes:

gainstentranceofdirt, whichwillbeforcedinto

nnertubewhenthetire isinflatedthenexttime.

rpastthe valve.Thisleakageisaccentuatedby

whichmayaccumulateonthevalveseatbe-

evalvecap.

ngthevalvecapson allvalvestemsatall times

essuresorinflating).Thesecapssealthedirtout and


/http://www.h


use#pd-google


37/313

NS

s cutsandbreaksshouldberepairedpromptly

riorationofthecordstructure,whichmayresultin

siverepairs.Smallcutsinthe sidewallortreadrubber,

dbewashedoutwithgasolineand filledwithtreadcut

ntmoistureand dirtworkingintothefabric.If the

enailorsimilarobject,a regularrubberplugmaybe

the timethetubeis repaired.

gsontherim,the tiresshouldbeinflatedto about

eating ofthetirebead.Thenthe pressureshouldbe

valuefornormaloperation.

ION

ppagewillbeexperiencedwhenusingrubber-tired

s.Whenthereis evidenceofslippagebythereartires,

rofthetractorshouldbe filledorpartlyfilled withdirt,

materialto getthenecessarytraction.

elfull,holdsapproximately6cubicfeet.Filled

ghtwillvaryfrom 540to810pounds,withearth 450

d450to720 pounds.Theaddedweightwillvarywith

ebox,andthisshould bekeptinmindin loadingthe

ransported,thedooronthe bottomoftheweight

ndthe loosematerialdumped.Besurethatthebottom

eforethebox isagainfilled.

ingWeightBox

calConnectiontoTailLight


/http://www.h


use#pd-google


38/313

NS

tothe tractorbymeansoffourpinsFigs. 14and

cotterkeys.Beforeremovingtheweightbox,make

Fig.14is disconnectedatthebracketontheseat.

ofsleeveonthe bracket.

singthe procedure.

xAttachment

ghtBox4.

htWire


/http://www.h


use#pd-google


39/313

ERATOR'SINSTRUCTIONS

RMALCONDITIONS

ionoftheCaseModel'SI' AirBorneTractor

nablynormaloperationinthetemperatezone.Opera-

tions,suchasextremecold(belowfreezing),indust

rtainprecautionsbetaken.

ON

edin coldweather(airtemperaturesbelowfreez-

ustreceivespecialcare,andthetractormust becare-

roilsand greases.

gradeofanti-freezeintheradiator.While

ezearetobe preferred,alcoholoralcohol-basesolu-

owever,topreventlossofalcoholby evaporation,

stnotbeallowedto riseabove160F.

gsystemandinspectradiator hosesandconnec-

eezeintheradiator inordertopreventloss ofsolution.

houldacompoundof(unknowncompositionbe

fulto thecoolingsystem.Nosolutionsofcalcium

ormagnesiumchlorideshouldbeused.Theelectrolytic

ydamagingtometalparts.Likewise,nosubstances

osene,honeyorsugarsolutions,sodiumsilicateor

xtrafirehazard,destructionofthe radiatorhosesand

eriorsurfacesofthe coolingsystemmayresultfrom

ls asrecommendedinlubricationchartFig.8.

eritisveryimportantto changeoilmoreoftenthanin

tionofwaterintheenginecrankcaseismuchgreater

antityof waterisallowedtocollect,itmayfreeze

tsorburnedout bearings.Toavoidthisdanger,loosen

y,afterthetractorhas stoodforacoupleofhours.If

kcaseitwilldrainoutwhen thedrainplugis backedout

dsareholding.Itis notnecessarytocompletelyre-

e oilinthe aircleanerremainsfluidsothat itcan

mtothefilterscreens.If theoilcongeals,itcanbe thin-

LYDUSTYCONDITIONS

nditionscareshouldbeusedtomakesure thatdust

eltankin fillingorbearingswhilelubricating.The

edregularly.

uretorpassesthroughanoil-bathaircleanerwhich

ematerialandkeepsit fromenteringtheengine.In

heaircleanermust beservicedregularly.Thismust


/http://www.h


use#pd-google


40/313

NSStorageandShipment

ntervals,underbaddustconditions4hour intervals.

recontainedonpage23.In addition,thehosecon-

ertothe carburetormustbekepttightatall timesso

ntaminatedinpassingtothecarburetor.

ustsealedat allotherpointsbymeansof gaskets

hecrankshafthasaleatheroilsealat thetiminggear

ersin thetransmissionaresealedtopreventloss

Rearaxlesarelikewisecarefullysealed.

DYCONDITIONS

whichfit intoaretainer.Theretaineris heldto

chinescrewsandshouldbekepttightat alltimes.The

eakingout ofthebearingsorwaterfrom entering.The

ngthebearingsandalsokeepsout dustandmud.

missionretainlubricantand prevententranceof

GEORSHIPMENT

fromoneshifttoanother,overnightor periods

ig.5.

g.5.

tankNo.2Fig.4.

Weekup toaMonthUndertheseconditions:

ig.5.

g.5.

eltank,fuellines andcarburetorbyopeningdrain

rburetor.RemovefuelstrainerbowlNo.3 Fig.4.

perationis doneinfreezingweatherunlessthe

dwithanti-freeze.

regiventractoranddate preparedforstorage.

Month

slonger,the tractormustreceiveadditionalcare

dothis,stop theengineandremovethetwo

ig.3in theintakemanifold.Attachcupsor

canbemadewitha y&inchelbowanda short

starttheengine,setthethrottle athalfspeed;

nerorpipe approximately]4.cupfulory^pintof

whenexcessivebluesmokeappearsattheex-

or thispurposeiscommerciallyknownas

No.10engineoilwillbesatisfactory).This

othe engineputsaprotectiveoilfilm onpistons,

sandotherengineparts, protectingthemfrom


/http://www.h


use#pd-google


41/313

RATOR'SINSTRUCTIONS

rust.Afterthe operationiscompleted,thepipe

vedandthepipe plugsputbackintothe intake

tensecurely.

, andcarburetorbyopeningdrainvalveNo.3

emovefuelstrainerbowlNo.3Fig.4.

teryandmakeprovisiontocharge everymonthor

alstokeepthe gravityabove1.240.

if operationisdoneinfreezingweather,unlessthe

dwithanti-freezesolution.

mpletelyfollowinglubricationchartpage 18.

tractorindryplace andplacingblocksunderaxles

andpreventtheirtouchingtheground.Protect

puttingback intoservice,besureair pressure

sforfronttires and12poundsforrear tires.

re giventractoranddatepreparedforstorage.

rsoronflat cars:

utlinedon page33.

andcarburetorbyopeningdrainvalveNo.3 Fig.

elstrainerbowlNo. 3Fig.4.

shipmentismadeinfreezingweather,unlessthe

dwithanti-freezesolution.

removingfromtractor orcoveringsecurely.

oundspressure topreventbouncingandchafingin

ntoservice,reducepressuresto28 poundsfor

forreartires.

tractor tocarfloorto prevent-shiftinganddamage

r equippedwithHoughLoaderwhenpacked

relypackedin acrateofthe followingdimensions:

0

as,oil andwaterusedinthis tractoris126pounds

f 4208pounds.

ntooperationthefollowingparts,whicharealso

Rods

Shaft

be surethatfronttirehas 28poundsofair

12poundsofair pressure.


/http://www.h


use#pd-google


42/313

NSTolerancesandClearances

orequippedwithLaPlantChoateHydraulic

ExportShipmentissecurelypackedinacrate ofthe

s,oilandwater usedinthistractoris 126pounds

f 3408pounds.

tooperationthe followingparts,whicharealso

stalled:

Shaft

besurethat fronttirehas28 poundsofairpres-

oundsofair pressure.

ingonthedestination.Ifgoing intocombat,

dandfilledwith oil,fuelandcoolingsolution.If

maybe drainedasdesired.

dwithaHoughLoaderweighsapproximately

thgas,oil andwaterreadyforoperation.Withgas,

eighsapproximately4082pounds.

LaPlantChoateHydrauliccontrolsweighs3408

s,oil andwater,readyforoperation;withgas,oil

ghsapproximately3282pounds.

temmust bepreparedfortheminimumairtem-

nteredeitherinflight orontheground.Anti-freeze

reezing temperaturesmightbeencountered.Com-

onpage32 underColdWeatherOperation.

elylashedin theplanetopreventshiftingin flight.

ERATOR

tiesdonotterminatewithmerelydrivingthe

eltankfilled.It ishisresponsibilitytosee thatthe

mechanicalandoperatingconditionaswell asto

rance.Serviceandmaintenancesectionsmustdepend

onthegeneralperformanceofthetractor.It is,there-

vantagetobecomethoroughlyfamiliarwiththefunc-

ofthe tractor.Weurgethestudyofthe information

ntainedinthis book.


/http://www.h


use#pd-google


43/313

NDCLEARANCES

n.+or/^in.

aiseorlower1 in.

henengagedyiin.

enfingersandthrowout

eoffirstringingroove.003-.0045in.

ncesecondandthird

in.

encompressedto3.5in..010-.020in.

requiredtoclosejoint11 to14lbs.

dplay

nningclearance

tallength

s,torquetotighten

eaboveblock

etotighten

eats

pening

learance

ce

ghten

ve

oclosej oint

sedto3.5i n.

s,checkwith

shinginrod

ton

ablerunout

lve

uide

compressed

ed)

compressed

n)


/http://www.h


use#pd-google


44/313

NS

rrespectiveheadingsaresomeofthe

difficulty.Ifyouarehaving anydifficulty

welltocheckyourenginewiththis list.

13

plugs.......13,69

.65

........11,21

.......12

..23

....21,46

y.........56

adjusted.......55

.......56

65

23

........23

3

ng.........56

.......56

6

......56

ed........55

58

...58

25

....46

artiallyclosed......46

......65

.....50

8

......18,19


/http://www.h


use#pd-google


45/313

TOR'SINSTRUCTIONS

56

st 23,47

ngs60

. 61,62

5

24

EXHAUST

pentoofar.. .)Black21

Smoke21

/Smoke18

18

PE

65

n.57


/http://www.h


use#pd-google


46/313

ONS

ONSFORTHECASEMODEL

esmuchoftheservicerequiredontheenginein this

tremovingtheenginefromthe tractor.Manyas-

oved,servicedquickly,putbackinplaceandthe trac-

minimumofdelay.

dontheCaseModel'SI' Tractorisextremely

roperlyadjusted,it willrequireattentionveryrarely.

eprovided.Fig.9.

eterminestheminimumspeedof theengine

ndernoload.

hemixturesuppliedwhenidling.

marilythe mixturesuppliedatthehigherspeeds

power,fueleconomyandsmoothnessofopera-

ntsshouldbemadecarefully.Oncesettingsaremade,

dexceptundernewtemperatureconditionsorwhen

is reason,thegradeoffuelshouldbe maintainedas

r

isassembledonlyatmainbases.While itisa

tisa precisionmechanism.Disassemblyshouldnever

thecarburetormustbetakenapart,replaceitwith

sendthe carburetortakenoffthetractortoa main

th161 seriescarburetorswesuggestthefollow-

screw(6Figure19) andspring.

obowlassemblyscrewswithascrewdriver. (There

andlockwashers.)

ightly andloosenthegasketfromthebowlas-

gasketclearofthebowlassembly,being'careful

t.

gure19).

singa screwdrivertopushtheaxle fromtheslotted

fingers toremoveittherest oftheway.

blyandthefuelvalve needle.

ytobowlgasket.

eatandgasketusing ZenithC161-85ServiceTool.

ing asmallscrewdriver(&"blade).

throttleplateREADNOTEAfollowingsection

enproceedtoremovethethrottleplate screws,


/http://www.h


use#pd-google


47/313

. C.

ression^^

none

ssembled

wardthe

rrelthe

ve.0I0to

007to

op

ondand

.0il

Select

e.

ed

ca-

am

ha-

nor

arancebetween

.010',hot.

e


/http://www.h


use#pd-google


48/313

ne


/http://www.h


use#pd-google


49/313

ankshaft,ConnectingRodsandPistons

Barrel13.

n14.

OrderingReplacementParts.

ap

g

erpinusing asmallpunchanda hammer.

aftpackingretainersandpackingsusinga screw

ersto liftouttheretainers.

dentificationdiscwhichisrivetedto thebowlcover(see

8),thethrottlestoppin,the floathingebracket,or


/http://www.h


use#pd-google


50/313

ONS

enith

4Figure19) usingasmallscrewdriver(jV blade).

gejet(3)andgasketusing ZenithC161-25Service

tmentassemblyandgasketusingaX" open-end

dgasketusing C161-1ServiceTool(orasuitable

ertaperpin usingsuitablepunchandlighthammer.

er.

ewsandlockwashersto

teandshaft.

ftpoleplug (CR137-19)usingasuitablepunchand

entchannelbushing(10,Fig. 20),airshutterstoppin, air

n,ordripplug.

ottlebody castingingasolineorothersolventand

elwithcompressedairtomakesurethat allchan-

Partsto beReplaced"forlistofparts whichwe

enoverhaulingthistypeofcarburetor.(See


/http://www.h


use#pd-google


51/313

or

tA

sFollows

positionand

screwsandlockwashers.Besureairshuttervalve

owninFigure19andthat theairshutterplateis

ighteningthescrewssecurely.

assemblyasfollows:

wide-openposition.

shaftandagainstthestop pininthedirection

T63-2taperpin.)

kesuretheair shutteropensandclosesfully.

holeplug(CR137-19)usingalight hammer.

newgasketusingZenithServiceToolC161-1.

entandnewgasketusingaX"open-endwrench.

ejet(3)andnew gasketusingZenithServiceTool

nga smallscrewdriver(nogasketrequired).

packinginnewpackingretainerring and

rring(withpackingin) inrighthandshaft boss

tinposition and

e noteA).Thethrottleplateshouldbe properly

gthescrewsandlockwasherssecurely.

blyon thethrottleshaft.

ateisstraight upanddowninthe barrel(wideopen)the

stthe stoppin,then

verassemblyandshaftusing aNo.45drill and

ng asmallscrewdriver(nogasketrequired).

tandnewgasketusingZenith ServiceToolC161-85.

ytobowlgasketin position.

einpositionfollowedby thefloatassemblyand

thehandleendofa screwdrivertostriketheend of

slottedendof thebracket.Thefloatshould


/http://www.h


use#pd-google


52/313

TIONS

o obtaincorrectfuellevel,asshownin Figure21.

l^i" plusorminus%".(Movethe gasketto

measurement.)

'positioninthe throttlebody.

asa locatingbossthatfitsinto agrooveinthethrottle body.

yinposition onthethrottlebodybeingcareful to

sandlockwashers.Besureto tightenthescrews

crew(6). andspring.

ustment,setthe idlingadjustment(6)andthemainjet

open andadjustthethrottlestop screwtohold

n.

series carburetorwerecommendthefollowing

fromZenithCarburetorDivision,696HartAve.,

tWrench.

Wrench.

ServiceTools

gparts shouldbereplacedwhenoverhaulingthis

kets,C181-66gasketkitcontainsthem;C81-17Fuel

(sizeNo.35); MainJetC52-6No.30;C55-6No.16

t C66-46No.50;C52-2No.28Well Vent;C85-28

oatAxle;C23-258ThrottleShaft;AirShutterShaft

eShaftHolePlug;C131-4-2PackingCap(2required);

required);CT62-1Cotter;CT63-2TaperPin;

uired);T41-5PlateScrewLockwasher(4required).

1-88.


/http://www.h


use#pd-google


53/313

NSTRUCTIONS

epriminghole pluginrelationto thethrottleplate

uniformidlingandpart throttleoperation.Tomain-

weenthepriminghole plugandthethrottleplate,our

ottleshaftandplatein thethrottlebodybeforedrilling

oleplug,locatingtheholein adefiniterelationtothe

It isreadilyapparentfromtheabovethat throttle

annotbeinterchangedindiscriminately.Whenit

placethethrottleshaftorthrottleplate,we suggestthe

pscrewtopermit completeclosingofthethrottle

losedpositionandmarktheinsideof thethrottle

ate withasteelscriber.

saguide,replacethethrottle shaftorplate.Ifnew

blevariationfromoldone,select anothernew

eryclosetothescribed linewheninstalled.

ereplaced,werecommendobtainingacomplete

ludingshaft,plate,primingholeplug,etc.,built

happearsonthe identificationdisconthebowl

midentificationdiscrivetedtothecarburetorbowl

blyoutlinenumbertowhichthecarburetorwasorigi-

specialpartssuchas throttlebodies,throttlelever

etc.,besureto specifyoutlinenumberofthecarbure-

ectingpartsrequired.

THROTTLESHAFTBEARINGSisanopera-

emptedunlesstheshopisproperlyequippedfor such

hrottlebodyassemblywitha newonebuiltto

ontheidentificationdisc.

andidlemixturecan bestbemadetogetherand

ginewarm.The throttleleverontheseat mounting

ayforwardbeforemakingthe adjustment.Theidling

beadjusted sothattheenginewill idlefastenoughto

theidling jetadjustingscrewFig.9in oroutuntil

hisadjustmentisonefull turnfromtheidling

ethecorrectsettingisusuallybetween$4 and\%turns

madewhentheengineis warmandworkingun-

he greatestinfluenceunderthoseconditions.Turning

videsa leanermixture,whileturningoutwardpro-

the enginestartstomissor powerfallsoff.

operoperationis securedaboutyiofaturnis usual-

llassuremaximumfueleconomywithverynearly


/http://www.h


use#pd-google


54/313

ONS

ththeoriginal setting,makeanapproximate

mainjet valveinwarduntiltheneedlejust seats.

ethepointagainsttheseatas thismayruintheseat.

dtwofull turns.Thissettingissufficientlycloseso

rateduntil finaladjustmentismade.

hroughthe carburetorindicatesthemixtureis

evidentwhenthe engineisacceleratedbypulling

Anoverlyrichmixtureisindicatedbysluggish action

ppearanceofblacksmokeattheexhaust.Thefinal

aspossibleandstill havesatisfactoryengineoperation

neris topreventdirtandabrasivematerialfrom

erservicingcannotbetoostronglyurgedbecausedirt

inewiththe

rmful.They

onpistonsand

es,wearon

ycausethe

orholdopen

rn.

ingofthe

rativewhen

onditions.

ons,more

ssary.

cleaner

oosenthebail

theaircleaner

ncludingthe

emovedfrom

hecup.Never

up.Clean

ecupand

acethebaffle

free-flowing,

elindicated

Makecer-

oothwithin

y.Then re-

unit.Lock

gbaildown-

apsintoplace.

AirCleaner

leaner


/http://www.h


use#pd-google


55/313

STRUCTIONS

blymoreoften,dependingentirelyondust con-

shouldberemovedfromthe engineandcleaned.Un-

dthemetallicwoolandretainerbe removedfromthe

gnparticlesoffthelowerside ofmetallicwool.Then

apailofcleankerosene.

theair cleanercapandcleantheinsideof the

aircleaner.Aswab,madeofpieceofflexiblewire with

d, isaneffectivetoolforthis purpose.Theairintake

of excessivedirt,asablockedintakewillreducethe

carburetor.Tooricha mixturewillresult,inturn,

er.

replacethemetallicwoolin thebodyofthe

uldbe replaced.Ifthewoolisnot properlyinstalled

unitwillnotoperate,properly.

ECTIONS

shouldbekeptair-tight.Otherwise,thepurpose

efeated.Besurehosebetweentheair cleanerand

stalledandhoseclampskepttight.Excessiveengine

eleaksbetweentheaircleanerand thecarburetoror

han efficientflyballtypegovernordrivendirect-

factorytogivea no-loadenginespeedof1680R.

speedof1550R.P.M. Todeterminetheengine

meter(speedindicator)andtakethe speedsfromthe

orcranking.No.20 Fig.4.Theno-loadspeedof

175R.P.M.EngineR.P. M.canbecalculatedby

shaftR.P.M.by 1.44.

theenginespeedmust bechangedtobringit to

adjustmentcanbemadebylengtheningorshorterning

ottleleveron theseatmountingbracketwiththe

t handsideoftheengine.No.4 Fig.4.Shortening

heenginespeed,whilelengtheningdecreasesthespeed.

nthasbeenmade,besure thatthelocknutsarefas-

adjustlength ofthrottlerodatthe end

ysdoitat thepointnearthebattery boxNo.

sanddisconnectgroundingwireNo.12 Fig.4at

reabout^iinchfrom engineblock.Turnmotor

No.1 cylinder

1Fig.24frommagnetobracketNo.1 Fig.24.

nchcapscrewsholdingmagnetobrackettocylinder

mblyout.


/http://www.h


use#pd-google


56/313

ONS

netoAssembly

eitherend ofpinsforgovernorweights,whichare

eout.Careshouldbetakennot todamage

g.25 cannowberemovedfromtheendof shaft

osefitandshould slidefreely.Removesnap

dpull offbearing,whichisnota tightfit.

arNo.4 Fig.25fromshaft,takeoffsnapr ingthat

an bepulledwithanysuitablepuller available.

romgearendofshaftNo. 3Fig.25,andpull shaft

obracketNo.1 Fig.25.

o.3Fig.25has excessiveplayinthemagnetobracket

sshouldbereplaced.Drivebushingsoutand

Shaftshouldturn freelywhenreplaced.

hegovernorsleeveshouldbereplacedifit shows

ylightpress fit.

payingparticularattentiontogovernorweights.

singcarein forcinggovernorpinsinplaceand

sare properlysecured.

camshaftgearandgovernorgeararemarked

ut cannotbeseenunlessradiatorandtiming gear

ecialCareshouldbetakenwhengovernorassemblyis


/http://www.h


use#pd-google


57/313

randMagnetoDrive

ng

nger

eforGovernor

norSpring

overnorArm

enOrderingReplacementParts.

placedthecompleteassemblyisagainbuiltup.

tilthe drivingslotinthe magnetocouplingNo.

yondthehorizontalpositionofgovernorhousing.

place andputinthe threeHcapscrewsand

positionand holdsparkplugwireleadingfrom

butor abouty&inchfromaluminumframeof

impulsecouplingina clockwisedirectionwith

meuntilasparkjumps betweenthecableandthe

wrenchfirmlysotheimpulsewillnot move

rips andthesparkoccurs.

ulseofmagnetowillbe25 degreesbeyondthehori-

etoFig.35,and shouldmatchthemagnetodriv-

ng.Attachthemagnetotothemagnetobracket

dtighten securely.

ckto seethatimpulsetripsfreely,so magnetowill

wlywith thehandcrankuntilthe impulsecoupling

^ inchholeNo.1Fig.34 intheflywheelrim

dertheinspectionholeinthe right-handsideof

secouplingreleasesatsomeother point,itwill

twoscrewsholdingthe magnetotothegovernor

gnetoslightlyuntilthe impulsereleasesatthe

opof themagnetotowardtheengineretards

romthe engineadvancesthespark.When

unningspark isautomaticallysetatthecorrect

ivethe bestpoweroverthewholerangeof en-


/http://www.h


use#pd-google


58/313

ONS

earsat FrontofEngine

tGearsCorrectly

aftGearsCor-

erhasCoiled


/http://www.h


use#pd-google



/http://www.h


use#pd-google


60/313

ONSoaPump

ventypeoperatingthroughspiralbevelgears

latesoilthroughpassagesin theengineblocktoall

camshaftbearingsaswellasvalverockerarmsand

floodlubricated.Allotherenginepartsoperatein

ectingrodbearings.Thesamepumpprovidespres-

chshaftpilot bearingandtheclutchthrow-outcollar.

requiredisto removeandcleanthoroughlythe

hoursof operation.Thisprocedureisdescribedon

ereliefvalveislocatedinthe sideofthepump

-passestheoili ncaseswhereoilpassagesareplugged

thin.Theseconditionswillbe indicatedontheoil

eisset toregister25to 30poundsontheoil pressure

andbearingsareingoodcondition.Thepressure will

heengineis used,butitshouldnever beallowedto

ormal enginespeedwithoutinvestigatingthecause

ytoproperlylubricatetheengine willfailifthese

orrectasoutlinedonpage 17.

ncrankcaseandfreezingaroundthescreenwhen

correctasoutlinedonpage32.

velpage11.

ychecklubricationchartforrecommendedgrade

usuallyoccurringafterlongservice.Correctionin-

blingtheOilPump

benotedthattheoil pumpismountedonthe

ck.To removeoilpump,theoilpumpscreenmust

edonpage17.Theoil panmustbetakenoffthe en-

1. Theoilpumpcanthenbe removedasaunitby

p,referto Fig.27anddriveoutpin (2)fromoil

ear(1).

3)andslideout drivegear(11)togetherwith

ovedrivengear (10).

ide outspring(6)andrelief plunger(5).

ywornpartsintheoil pump,theyshouldbere-

sembledbyreversingtheprocedureindicatedun-

toseethat thereliefnut(7) issecurelytightened.No

ntheoilpump cover(13)andthebodyof (4)sothe

mountedandthemachinescrewsecurelytightened.


/http://www.h


use#pd-google


61/313

carefullyinstalledtoprotectdrivegearand camshaft

mbledandbeforeitisinstalledin theengine,the

freely.Ifpressuredoes notshowontheoil pressure

started,stopthe engineatonceandchecktomakesure

the crankcaseandtheoilpumpproperlyassembled.

earance

hRod2. JamNut3..010InchFeeler Gauge


/http://www.h


use#pd-google


62/313

ONS

erHeadbyLiftingStraightUp

MS

escanbe tracedtotheoperationandadjustment

,enginemissing,engineoverheating,lackofpower

ustpipeare afewofthesedifficulties.

ANCE

alvecovermust beremovedandallsparkplugs

stvalveclearance.

erarmsandendsofvalvestemsshouldbekept

aranceshouldbe.010inchwhenthevalveis fully

m.

valveclearance,therimoftheflywheelis marked

ylinder.Removetheplugfrominspectionholeon

Fig.34 andcranktheengineuntilmark''D" onfly-

ththehole.Thisis topdeadcenterofNo.1 andNo.

nstrokecanbe detectedbynotingtheactionof

compressionbothvalvesandpushrodsarestationary.

mentofbothvalvesforthiscylindercanbe made.

dturn adjustingscrewsuntil.010inchclearanceis

ssecurelyafteradjustmentismade.Recheckafter

ineis1-3-4-2.

wlyuntila distinct"click"isheardfromthe

g.Whentheclicksounds,stopthecrankimmediately


/http://www.h


use#pd-google


63/313

STRUCTIONS

No.3cylinder.Proceedinthesamemannerfor

TS

ackof powerislackofcompressioninone or

.withpoorcompressionisinefficientandshouldnot

stedfor compressionleaks.Beforemakingthe

un untilitis warmeduptoworkingtemperatureand

properlyoiled. Donottryto testcompressionona

eading.Whenawarmengineishandcranked,there

ceaseachpistonis oncompressionstroke.Ifcom-

ablybecauseofcompressionleakspastthevalves,orif

tedforseveralmonths,there maybecompressionleaks

will requirereplacementofringsorpistons.

removethevalvecoverand squirtkeroseneon

rarmsto removeanygummyoilaccumulation;then

esthiscarewillcausevalvesto seattight.

armedifthey hearaslightamountofcompression

ats.Valvesseldomremainabsolutelytightinservice

ticeablebecausetheexhaustpipe isclosetotheman

enginehasgoodpower,it isbestto leavethe

oughtoreconditionvalveseatswhentheyareknown

power.

SEATS

elackspowerduetoleakingpastthe valves,

edorpitted, andwhenthisoccurs,meregrindingwill

estoretheconditionsthatare necessaryforsatisfactory

reconditionedasfollows:

olingsystemandremovesparkplugs.

d.

r.

arburetorasaunitby looseningaircleanerhoseand

sattachingmanifoldtocylinderhead.

ldingbearingbracketsthathold rockerarmas-

mshaftandassemblycanbe removed.

eabove4mentionednuts,awireshouldbe placedlength-

d sametogether.Thiswillfacilitatereassemblyof

ecylinderheadstuds. Disconnectthecapscrews

t holdwaterflange.

elifted off.Fig.29.

blefromOwatonnaToolCo.,Owatonna,Minn.,

iesthe removalofvalves.


/http://www.h


use#pd-google


64/313

ONS

sUsingOwatonnaToolCompany'sValveLifterNo.

lswilldoas well.

tsarehard alloysteelinsertsandcannotberecon-

semodernvalveinsertgrinding equipmentfor

Theintakeseatsmayberefacedwithhandtools.

.

inderheadonenginesee thatthegasketisnot dam-

dgeandthatthe waterpassagesinthegasket

assagesin thecylinderblock.Attimeofmajor

ce,itis desirabletoinstallanew cylinderhead

rheadstudnutsevenly.Beginat centerstuds

routwards.Tightento60 ft.-lb.Afterengine

andiswarmedup,retightenstuds andresetvalve

ussedinAdjustingValveClearancepage55.

eckedwhileheadisremovedandshould meet

x.

heightof1%inches (valveopen)61to69lbs.

heightofl^ inches(valveclosed)25to28lbs.


/http://www.h


use#pd-google


65/313

ANCEINSTRUCTIONS

edbymeansofan impellertypepumpthrough

andenginehead.Thepumpis drivenbya'Vbelt

lationisautomaticallycontrolledbyathermostat

ureof160 F.

gsystemis4 U.S.gallons.

dwaterintoahotenginein whichthewaterhasbeenal-

.Todoso mayresultincrackingthecylinder

isnecessarytopourwarmwaterinto acold

ed,addthe waterslowly.Toorapidpouring

em

ularlyin thespringafterdrainingtheanti-freeze,

begivena treatmentwithwashingsodasolutiontore-

mentthatis accumulated.Theeasiestwayistodrain

2gallonsoffreshwater.Then bringtoaboil an

addall thecommonwashingsodathatwilldissolve.

to thecoolingsystem.Runtheengineasusual for

horoughly,andrefill withcleanwater.

commendedtopreservetheinteriorsurfaceof

stight.Removeanyweedsordirt fromthecore

verheating.

onthefanhub. Fig.10.Totighten,turnthe

hedirectioninwhichthe bladesturn.Thetension

akeupanyloosenessorslackin thebelt.Havingthe

pid beltwear,excessiveloadonthebearingsanddoes

adjustedbeltcan easilybedepressedaninchwith-

hebelt,tightenhexagonnuts.

emadebylooseningthegeneratorand swinging

e thatV-beltdoesnotpulldownto thebottomofthe

beinstalledbylooseningtheadjustablepulley

ndslipping onthenewbelt.It maybenecessaryto

derto provideclearancebetweenthegeneratorpulley

Operation

coldweather,useagoodgradeof anti-freezeinthe

rsimilaranti-freezeareto bepreferred,alcoholor

besatisfactory.However,topreventlossofalcohol

temperaturemustnotbeallowedtorise above160 F.

rhosesandconnectionsbeforeputtinganti-freeze

reventlossof solution.

houldacompoundofunknowncompositionbe

fulto thecoolingsystem.Nosolutionsofcalcium

ormagnesiumchlorideshouldbeused.Theelectrolytic

ydamagingtometalparts.Likewise,nosubstances

osene,honeyorsugarsolutions,sodiumsilicateor


/http://www.h


use#pd-google


66/313

ONS

xtrafirehazard,destructionofthe radiatorhosesand

eriorsurfacesofthe coolingsystemmayresultfrom

p

No.10 Fig.31bytakingoutfour capscrewsthat

Fig.31tohub No.9Fig.31on waterpumpshaft.

ooseningthegeneratorandswingingittowardthe

eand2wireclips.

ewswhichattachthewaterpump tothewatercon-

hefrontoftheengine.Removethewaterpump

10.

Pump

1Fig.31 onwaterpumphousingbytakingout six

UsecaresothatgasketNo.2 Fig.31isnot damag-

d Fan

lf

alf

enOrderingReplacementParts.


/http://www.h


use#pd-google


67/313

RodsMAINTENANCEINSTRUCTIONS

ig.31 byusingsuitablepuller.Donot driveoff

impeller.

Fig.31onthefan bladeendofbearinganddrive

sembly.Thisshouldbedriven awayfromthe

an endofpump.

eenleaking,indicatedbywaterdrippingfromthe

ybethat thewaterpumpsealis worn.Inthat

ouldbereplaced.

ngsNo.6Fig.31are worn,acompletenewwater

houldbeinstalledbypressinginto placeandrein-

5Fig.31.

ent

atedbyInspectionarereplaced,the waterpump

einstalledontheengine.The fanbeltshouldbead-

e.25-

ordevelopsseriousleaks,itmustbe removed

gwiresto avoidanypossibilityoftheenginestart-

gsystembyremovinghexagoncapat bottompipe

eradiator.

d.

perradiatorhose.

erradiatorhose.

oldradiatoron radiatorbracket.

ersectionsofradiatorshroud.

tor,placelowersectionofradiatorshroudinposi-

t,putradiator intoshroudandinstallbolts mentioned

and bracket.Fromthispointreverseaboveprocedure.

stractorare accuratelymachinedtothefollow-

8^inches

2.375inches

nchesminus.003inches

e.0015to.0035inches

1inches

vablefromtopofblock

essureindicatesthatbearings areloose.

aps,notetheirpositionsandkeepthemseparated

eassembling..Numberedsideofcapsand rodsare


/http://www.h


use#pd-google


68/313

ONSputon..ndRing,

gsonthecrankendare precisiontype,heavysteel-

hellsareinterchangeableandquicklyreplaced.They

enttheir rotatingonthecrankshaft.

bestraight,freeof twistandparalleltothe pis-

assembledwithtwoheat-treatedcapscrewswhich

with4rings,allabovethe pistonpin,including3

eventilatedoilring.

eyIron

.005inch

piston4

srequiredperpiston3

er piston1

240-.1235inch

860inch

hencompressedto3.5inches.010-.020inch

pressedto3.5inches.007-.017inch

ompressionring.003-.0045inch

ndandthirdcompressionrings.002-.0035inch

g.0015-.003inch

ointon compressionrings11to14lbs.

ointon oilring8to 11lbs.

AN

rviceconnectingrodormainbearingsorremove

ns,itisnecessaryto removetheengineoilpan.The

omplete.

oilby removingoildrainplugNo.15 Fig.4.

enNo.9Fig.3by removingthreecapscrews.Use

tgasket.

E. boltswithlockwashersandnutsthat attach

gefront end.Thegasketisonepieceusecare

ewsfrombottomofoilpan.

oved.

ocedureoutlined.

nnectingRods

removedtheconnectingrodbearingcapscanbe

dremovedFig.29,thepistonandconnectingrodcan

ghthecylinderbarrel.

e careinfittingnewonesto grooves.Compres-

ed withdotupwardortowardthetop ofthepiston.


/http://www.h


use#pd-google


69/313

ONS

onslistedabove.Wheninstallingringsonpistons,be

hering grooveonpiston.Dipthepiston inoilbefore

eringgapsaround thepiston.

typeretainedinthe pistonsoneachendbysnap

esinthepiston.

hes

92minus.0003 inch

chsmaller thanpistonhole.

chsmaller thanbushinginrod.

goutthe snapringsandpushingoutpin.

edwithreplaceablewet-typecylinderbarrels.

removedFig.29 andtheconnectingrodsand

ullingthesleeve.

oCylinder

ng.Thisisa

aToolCo.Tools

oas well.

tiallyPullec

o .003InchHigher

WhenCylinder


/http://www.h


use#pd-google


70/313

ONSCylinderBirreU

barrel isillustratedinFig.32 and33.Inthis

ghtheOwatonnaToolCompany,Owatonna,Minn,

oolsetswill doaswell.

d therubberringremoved,thelowergroovein

ecleaned.Theshouldersonthe newbarrelandin

ecleaned.

tha newoneandfitit intothelowergrooveof

asearoundtherubberring beforeitisput inplace

sidethelowerend ofbarrel,beforeputtingitin place.

otewhenthe endenterstherubbergasket.Push

thatthetopshoulderseatsin thecorresponding

nceisencounteredinreplacingthe barrel,ablock

ofthebarreland ahammerwillserve.Thefinalposi-

.003inch higherthanthetopsurfacesofthe block,

ut onandtightened.

sareselectfits inmanufacture.Therefore,both

e sametime.

edandinstalledas indicatedbefore.

gasketwithanewone.Replacethecylinderhead

nuts.Theseshouldbe tightenedevenlyandfirmly.

wnup first,workingfromthecenteroutward.Tighten

stem.

ockerarmassemblyand settheclearanceto.010

warmedup,the headstudnutsshouldbetightened

ceagainadjusted.

carburetorandconnectuptheaircleaner.

tions,installgasolinelines,controls,etc.,and

emptingtostartengine.

vehadnewcylinderbarrelsandpistonassembliesinstalled

onsiderationthatis givenanewtractor.Pistons

achinedandhonedtoa veryfinefinishandshould

hefirstfiftyhours, runathalfloador lessbe-

erblockor crankshaftistobereplacedinthe

removedaccordingtotheinstructionsoutlinedhere.

bedonpage60.Thenproceedasfollows:

ventdamaging.

kshaftpulley.

pull fandrivepulleyoffthecrankshaft.Donot

ley.

dfanassemblyasa unitbytaking'outthree

s,whichsecurethelowerwaterpumpbodyto

underthe tractor.

ecrankcaseandfromtheclutchhousingatthe

oncase.


/http://www.h


use#pd-google


71/313

NSTRUCTIONS

eleft-handside oftheoilpan bytakingout3cap

pump.Pages53and61.

sforsplittingthetractor,as shownonpage87.

arburetoratgovernorlever.

carburetorassemblyasaunit,byremovingnuts and

dsinthecylinderhead.

drear endsofcrankcase.(Usetackleandchainif

gtheradiator brackettothecylinderblockand

xleassembly.

alongtheleft sideofthetractor.Caution:These

hto supporttheengine.

xIS18-^"splittingpinsmentionedonpage89.

eonits leftside.

emovedasrecommendedonpage63, anditbe-

vethecrankshaft,proceedasfollows:

omthecrankshaftbytakingoffthejam nutsand

heelbolts.

coverfromthecylinderblock.Becarefulnot to

ealinthe cover.(Setsmallcamshaftthrustplun-

oidmisplacement.)No.6Fig.26.

romthe crankshaft.

grodandpistonassembliesthroughthebottomof

bearingcaps.

.

nkshaft,cleanallpartsthoroughly.

eelywheninsertedinplace.

moothlyin theirgrooves.Theringgapsshouldnot

d.

nnectingrodsand capsshouldfaceawayfromthe

e.

makecertainthatthethree gearsatthefrontof

asshownin Fig.26.Thetoothonthe crankshaft

kmustbe between.thetwoteethhavingpunch

ar,whenthetoothon thecamshaftgearhaving

tweenthetwoteethbearingpunchmarksonthe

matchedthiswayvalveand magnetodrive

minggearcover,becarefulnot todamagetheoilseal.

erationswheninstallingthecrankshaft.


/http://www.h


use#pd-google


72/313

ONS

istractorconsistsofa high-tensionmagnetofor

,electricgenerator,batteryandelectricheadandtail

locatedontherightsideof theengineisa

ontainedunitwhichshouldnotbetakenapartin the

ntheparagraphsunder FieldServicing.Manymag-

heyaretamperedwithby inexperiencedoperators,un-

orat placeswhereproperservicetoolsarenotavail-

TO

rviceoperationsinvolvingthetimingof theen-

entiremagnetounit.

owill seldomrequiretimingunlessithas beenre-

servicing.Themagnetohasbeenproperlytimed and

theposition ofthecrankshaftinrelationtothe oc-

notchangeappreciablyinuse.

eto

ntheengine overslowlywiththehandcrankun-

eases.Atthis pointthe%inchhole intheflywheel

leinthecenterof theinspectionholeintheright hand

dTimingMarkson Flywheel

elforignitiontiming

outtoshowFlywheel

ctionHole,IndicatesTopDeadCenteronNo.1 or4Piston

tionHole,IndicatesPointofExhaustValveClosing


/http://www.h


use#pd-google


73/313

ONS

Thishole islocatedafractionofan inchfromthe

mand canreadilybeseen,or,if preferred,feltwith

asesat someotherpoint,itwillbe necessaryto

nthe mountingflangeofthemagnetoandrotatethe

mpulsereleasesat thedesiredpoint.Movingthetop

engineretardsthe spark;movingitawayfromthe

k.

ethesparkfromthatestablishedabove,especiallyifthe

ked.Thereisdangerofkickbackdueto the

etopdeadcenterposition ofthecrankshaft.

omtheEngine

resfromthemagnetotosparkplugs.Disconnect

utthetwo capscrewsattachingtheflangeofthe

rive.Themagnetocanthenbe liftedoff.

ledon thetractor,itmustberetimed.Follow

Positionfor InstallingonEngine

netoGroundWire3.MagnetoImpulse


/http://www.h


use#pd-google


74/313

ONS

resand Nos.2,3and4 sparkplugsfromhead.

inderremainsinplaceFig.35.

isina neutralposition.

etiming inspectionholeontherightside ofthe

ston comesupstronglyagainstcompression.

g.

owly.Watchthroughthetiming inspectionhole

mmediatelywhena%inchholeinthe flywheel

nin thecenteroftheinspectionhole.Thisis

ngthe magneto.

an uprightposition,asshowninFig.36. Connect

stotheNumber1 terminalofthemagnetocap.

nd istheupper-righthandterminal.Holdthe

wireabout^inchfrom theframeofthemagneto

th thewrenchoneclickatatime,Fig. 36,un-

thewireandtheframe.Usecareto holdthe

ysoimpulsewillnotmovebeyondthe point

koccurs.Thepositionatwhichthespark occurs

esettingofthemagnetoforfiringposition ofNo.

ettingsof theengineormagnetoasestablished

oontheengine.Install thecapscrewsholding

gin thisposition.

gPositionof Magneto


/http://www.h


use#pd-google


75/313

edtoServiceCase4JMAMagnetoListedon Page69


/http://www.h


use#pd-google


76/313

ONSM.(net.smceTJ,

wireandinstallthe sparkplugwires.Connectthe

n thedistributorcapwiththeNo.1 sparkplug,

2sparkplug,etc.

umeconomyismadebyrotatingthe magnetoto

thesparkasdescribedunder"CheckingTiming

TO

tousedonthis tractorisequippedwithsealed

gnatedbushingswhichreqi irenolubricationexcept

.

NTS

rpointssometimesrequireadjustingFig.47.This

donpage73 underServicingatBase.

BASE

yH.G.Makelim,1583HowardSt.,SanFrancisco,

yH.G. Makelim,1583HowardSt.,SanFrancisco,

eEisemannMagnetoCo.,Brooklyn,N.Y.or

as builtbytheC. W.LeinenMfg.Co.,Racine,

acapacityoverthetableof11 inches.

heldinthe ramofthearborpress bythepressure

tinthe shanksofthetools.Theinstallationof this

dingtothe sketchFig.38.

%inchholeinthe ramforthisball.The hole

butmusthaveaflangeto keeptheballfrombeing

olebythespring.

renecessarytoproperlyservicethe CaseJMA

ngpaste.

ufacturedbytheUniversalLubricatingCo.,Cleve-

.

uller.

wdrivers.

pluggap gauges.

polepieces.

orequivalent.

r.

lbearingson shaft.

ressbearingon toshaft.

ulsecouplingunit.


/http://www.h


use#pd-google


77/313

D

MethodofAdaptingRamofArborPressto

s

rush.

rtingstand.

ressshaftout ofbearing.

DISASSEMBLINGMAGNETO

ps.

bracketorinabenchvise whereitcanbeturned

romthedistributorcapterminalsshouldbe attach-

kgapswhicharesetat ^inchsparkjumpgaps.

Set

ithThree-

InchJumps


/http://www.h


use#pd-google


78/313

ONS

Nuts

Cap

ngor

nd inthesamedirectionasit revolvesontheen-

ientsparktojump the}'&inchgapat all4termi-

newhetherornot theimpulselatchesand

gneto.Thelatterischeckedbyfeelingonly,and

omhimselftoknowhowacorrectlyoperatingim-

whentrippedbyhand,continuewithtestsheaded

ap".IfitsparksO.K., referto"SparkCutting

6.

p

andthetwospecialnuts holdingthedistributor

capfrommagneto.Becarefulnotto pulldistribu-

spullinggearsoutof meshatthesametime.The

inthedistributorcap isassembledslightlyback

henthedistributorcapisr emoved,itisnecessary

slightlyclockwisetomovegroundingspringfrom

isk.

eelgearon therotorshaftbeproperlymeshedwith

rshaft.Whenthegearsarein anyway.incor-

oronthedistributordiskis awayfromthebrushes

spark occurs.Thiswouldcausethemagneto

adlyburnthedistributordisk face

geardirectlyunder onetoothmustmeshbetween

stributorgear.Fig. 43.Thebevelonthe

asebakelite)distributorgear mustbeontheside

distributordisk.If thebevelontheteethis on

ributordisk, thegearison theshaftwrongand

ymeshed,removethedistributordiskforfurther


/http://www.h


use#pd-google


79/313

ngorPro-Fig.44. RunningMagnetoonSynchro-

GearscopetoTest Spark

o

usethesparkisi ncorrectlyjumpingagapinthe

sedby

yleadtoo shortorburnedoffand notmakingcon-

nthedistributorcap.Thedistancefromthe

heendofthespring shouldbe1%inches.

indistributor cap.

distributordisk.

rs.Seeparagraph"CheckingGearDrive"page71.

distributorshaftbackwards.Seeparagraph"Check-

cope

disk.Fig.43.

e synchroscope.Fig.44.

ontheframeorbearingplate ofthemagnetoso

thespringon thesecondaryleadwirefromthe

speedandsparkshouldjumpfromspring toground-

etoisdead,referto"BreakerArmandContact

sweak(onlyjumpingfrom\\&inch to]/?,inch.)

e fieldofthechargingcoil.Fig.45.

ntheframe.Fig.45.

on thesynchroscopeasindicatedin"Running

ove.

gnetosparkisO.K.

diskwitha newone.Fig.43.

backintoplace.Fig.42.

edin "Testwith3-PointSparkGaps"page70.


/http://www.h


use#pd-google


80/313

ONSBreakerAnn.ndPoint,

etin

Armfor

sparagraphsshowsthemagnetotobedead,

capwitha newone.Fig.42.

edin paragraph"Testwith3-PointSparkGaps"

Points

erarm tobesurethat itisfree andoperateseasily.

andmakecertaintheyareclean.Fig.46.

mopensthe breakerarmbetween.015inchand

tpointopeninggauge.Fig.47.

free,

m.Fig.48.

ughly.

ebreakerarm.

ct

rArm


/http://www.h


use#pd-google


81/313

ctPoints

gneto

oCondenser

s.

ueor blacksurface,itmustberemoved.

whetstoneandNOTAFILE.Usea very

tas nearlysquareonthestoneas possible.

deflat.It isessentialtoleavea very

nt.Fig.49.

be suretheyarecleanandfree ofoil.

degreasingfluid.

ad,runit atthesamespeedas itrunsonthe tractor

oints.Innormalrunningthere shouldbesome

ntactpoints.Fig.50.

econtactpoints,thereis agroundinthe primary

horted,thus groundingit.

dwirefromthe condenserleavingitconnectedto

ing screw.Fig.50.Ifexcessivearcingatthe

ndicatesthatthecondenserwasat fault.This

excessivemissingatthe sparkgapsorperhaps

oto jumpyiinchgap.

hnewone.

e.

sthewireleadingfromthe coiltothebreakerarm

hroughthe contactpointsbacktothebearingplate

wireto thecoil.Ifit isgroundedorshortcir-

ntactpoints,itwillbenecessarytochecktosee ifthe

leadwireorthewire istouchingthebearingplateor


/http://www.h


use#pd-google


82/313

ONS

arting

ad,removethecoil.

o.5Fig.37,slip thehooksonthepuller jaws

coil.Fig.51.

er thepullerjawsagainstthemagnetoframe.

aceandbyturning withawrenchpullthecoil

positionastheoneremovedwith connecting

plate.

ecoilwiththosein theframeanddrivedown

hCompositionMalletNo.4 Fig.37.

aceUsing

on


/http://www.h


use#pd-google


83/313

earfrom

PlatePoints

agnetoframesupportingstandon thetableof

okefordrivingcoilonpole piecesNo.9

borpress. Pressthecoilfirmlybackinto

stas outlinedin"TheCondenser"page74.

peed

whenturnedbyhand,"Testwith3-PointSpark

atfullspeedon thesynchroscope.Ifthesparkcuts

testhatthebreakerarmis sluggishonthefulcrumpin.

anberemediedbycleaningasin "BreakerArmand

K. whenturnedbyhand,"Testwith3-Point

still sparksO.K.whenrunat fullspeed,"Spark

.

etomustthenbecheckedonthesynchroscope.

dtrip thenumberofdegreesatwhichthe arrow

s.Thisislocatedbackoftheimpulse.Fig.55.

mingshouldonlybe testedwhilethemagnetois

veryslowlyon thesynchroscope.

o,itisfoundthat thecamiswornso thatinorder

etothecontactpointswouldopen toofar,itis

ver)the cam,thuscreatingthesameconditionas

elgearontherotor shaft.Fig.56.Pryoffthe

camandreinstallthe steelgear.Atthispoint

ght amountwhenthesparkoccursattheright

rk maybechangedbyadjustingthecontact


/http://www.h


use#pd-google


84/313


85/313

uplingFig.60.CheckingImpulseCoupling

gneto

ortingstandNo.17,impulselugwrenchNo.16,

allin Fig.37asoutlinedin "ImpulseCoupling"page77.

uttwoscrewsandtwonuts andremovedistributor

vetheDistributorCap"page71. Fig.42.

overup.

ssemblyforwardoutof thebearing.Fig.43.

offsteel gearwithtwoscrewdrivers.Fig.56.

rewandpulloffbreakerbar.Fig.48.

akeoffbearingplate.Fig.61..

ememberthatthemomentthis isdone,the

tmustbechargedup againafterinsertingrotorinthe

vedand replaced.

ethegearandball bearingpullerNo.3Fig.37 as

bearing driverNo.18Fig.37in theramofthe

dpressthe shaftoutofthebearing.

cethetoolforassemblingbearingsonthe shafton

ss.Placethesocketforassemblingballbearings

ess.Placetheball bearingsontheshaftandpress


/http://www.h


use#pd-google


86/313


87/313

nser

tPoint

ceitin frameasinFig.52 startinginterlacing

.Pressto placeasshowninFig.53.For com-

eCoil"page75.

kecertainbothscrewsaretightonlockwashers.

rotorshaftas outlinedin"ReplacingBearings"

me.Besurebothrotorandframeare clean.

hand;bearingsshouldnotbetight.

ce.Makesuregroundingwireis fastenedunder

dthe breakerbarspringsupportisassembledon

1.

t

ockingplateheldby twoscrews.Fig.66.

ce.Itshould require11to15 ouncesonrubbing

ts.

makingsure theWoodruffkeywhichholdsit

aft followingthecam.

eshaftmakingsure theWoodruffkeywhich

acewiththe reddotisawayfromthe magnet.

tobesureit isnotbroken.Besureprimarywire


/http://www.h


use#pd-google


88/313

CTIONSA.embling

e tightonthecondenserterminal;thenput top

ghtheframe,placethe framebetweenthe

hargingcoilpoleswith thekeywayonthedriving

ndthat thekeywayisontheNorthPole side

ame.Placearrowtonumberwhichwillgivethe

tractor25.Thenscrew downtight.Fig.55.

eshell.Makesure thatthespringis securely

helloftheimpulse.Fig.60.

wayonrotorshaftand assembleontherotor

o pushkeyoutofkeywayinshaft.This can

erimpulsecouplingisinplace.

sherandnutonshaft.Besure togetkeyonspacer

Tightennutsecurely.

scope

scopeandtestasoutlined in"TimingofImpulse"

sitionwhereimpulsetrips byturningmagneto

isalwaysa laginthetime betweenwherethe

whenthesparkoccurswhenthemagnetois in

nts

dcorrectlythere shouldbe.015inchto .020inch

hentherubbingblockis onhighpointofcam.

lse"page76Fig.47.

hwhereit rubsthebrushesinthe distributorcap.

mbly

g caretomatchmarkedgearteeth.Toothover

ldbeplacedbetweenthetwobeveledteeth onthe

ldbeonsideof gearnexttodistributordisk.

"page71Fig.43.

pgasketis notbroken.

free.

notworndownbelowbrass retainer.Ifitis to

dbrush.Assemblenewone inplaceanddrive

olfor centerbrushNo.15Fig.37 andcom-

7 asusedinFig. 67.

butordiskFig.43 anddistributorcapFig.42,check


/http://www.h


use#pd-google


89/313

ark

agneto

minal

oundout

e

ew,

p.Bend

.67

ring

d.

shIntoPlace

ngandstartingsystemthatneedlubricationare

motor.Afewdrops ofoilshouldbe putintheoilers

ofoperation.Theoiler openingsintheendsof both

losedwithsmallsheet metalcovers,whichshouldbe

eaningthe surroundingsurfacestopreventdirtgetting

)Twolubricationfittingsareprovidedon thegener-

one onthestarter.Donot over-oilthestarter.Three

cient.

inpositionbymeansofa heavysetscrewand

sscrewmustbetightto preventrockingofthe

g.

Documents

TM 5-3014 CASE SI AIRBORNE TRACTOR WITH HOUGH LOADER BUCKET 1944