8GRNEryCondensedServiceDqto

TRACTOR DIVISIOil

JANUARY 1966

CORPORATIOlIPRINTED IN U.S.A.

CONDENSED SERVICE DATA

GRAVELY MODEL L TRACTORENGINE

The purpo se of thi s booklet i s to furni sh themechanic with the necessary informationheneeds to properly fit and service theEngineand Crankcase assembly of the GravelyModel L Tractor. Detailed assembly anddissassembly methods will not bediscussedsince the illustrations should give sufficientguidance to proper methods.

ENGINE AND MODEL DATAModeI Cylinders

1Bore

t-rrn,, t-rrr"

MAINTENANCE

Spark PIug

Recommended: Auto-Lite TT-10Of Champion W-89-DElectrode Gap " 033

Carburetor

See separate instructions.

Mpgngto

See separate Magneto instructions.

Stroke Di.splacement29.0 Cubic [rches

Key- tg Model Designations and Stl$ixes

LS--"Slow Speedfr (4 Thread Worm)Ll--r'Intermediate Speed'r (6 Thread Worm)L--Standard 'tHighSpeed" (8 Thread Worm)

On the narne plate serial number, M prefixmeans L00,000. For example, Tractorserial number r'100105rt would be shown asilMl05il.

Timing Magneto to Engine

Before timing spark to engine, inspectfaceof Magneto and locate timing marks. Ifthe timing marks are two lines, one on theMagneto face and one on the Coupling, pro -ceed by Method 1. If the timing marks area line and a dot on the Magneto face, and aline on the Coupling, proceed by Method 2.

Slow SpeedTractor

lmphL-L/Z mp}l"2 mph

L/2 mphL mphL-L/Z mpt.

L-t/Z mp}l2-L/4 llrrp}l.3 mph

3/4 mptl.L-L/2 mph2-L/4 mp}l.

TABLE OF ENGINE SPEEDS AND GROI]ND SPEEDS

Medium Speed Regular SpeedTraqtor Tractor

High Gear:

PTORPM

68210231364

L36420462728

EngineRPM

94618922838

34L682

1023

2 mph3 mph4 mph

Low Gear:

1 mph2 mph3 mph

Page Three

MAGNETO FACE PLATE

To accomplish by Method 1. (TVo Lines)

1. Remove Air Cleaner, Air CleanerBracket.

2. Loosen Magneto Coupling Nut until itslipsonthe Camshaft. It may be necessaryto tap coupling gently.

3. Remove Cylinder Head.

4, Bring Piston to Top Dead Center on thecompression stroke (both valves closed) .

Measure, accurately, ttre distance from topof Piston to top of Cylinder Wall. Recordthis measurement, then add 5/L6 of. an inch .

5. Turn the Starter Pulley counter clock -wise until the Piston goes down the cylinderapproximately an inch. Then bring Pistonback up Cylinder slowly until it is the dis-tance calculated in step four. (5/16" plusdistancefromtop of Cylinder Wall to Pistonat TopDead Center)" This procedure takesup any back-lash in the gears.

6. Hold the Magneto Shaft Extension withVise-Grip Pliers so it will not move. Ro-tate the Magneto Impulse (inoperative) untilthe timing marks line up.

7. Be sure that there is at least L/641' endplay in the Magneto coupling so it will notcramp the impulse. Use a L/64tt (.015)Feeler Gauge between the Fiber Block andthe Coupling Flange before tightening nut.Tighten nut while holding timing marks to-gether.

8 " Check your settings by backing the Pistonnot more than two inches down the cylinderbarrel (to avoidpicking up Magneto impulse)and review the procedure.

9. When timing is correct, lock MagnetoCoupling Nut.

10. NOTE: Timing Marks will not line upwhen piston is at Top Dead Center.

MAGNETO I'ACE PLAllE

To accomplish -ioy Method 2. (Lines and dot)

1. Remove Air Cleaner, Air eleanerBracket.

2, Loosen Magneto Coupling Nut until itmovesonthe Camshaft. Itmay be necessaryto tap the coupling gently.

3. Crank Starter Pulley r:ntil you feel thebeginning of the Compression Stroke. Re-move Spark PIug, observe by eye or, moreaccurately, measure to piston surface until

Page Four

Piston is exaotly at Top Dead Center.4. Hold the Magneto Shaft Extension withVise-Grip Pliers so it will not move. Ro-tate the Magneto Impulse (inoperative) untiltiming marks (Iine on Coupling and dot onMagneto) line up.5. Reassemble Magneto Coupllng' useL/64th (.015) Feeler, between FiberBlockand The Coupling Flange before tighteningNut, soyou will not cramp the impulse. Besure timing marks are togetherwhile tighten-ing nut.6. Lock Magpeto Coupling Nut. ReplaceAir Cleaner and Bracket.7. NOTE: Timing line on Coupling and doton Magneto line up at Top Dead Center.

I1UBRICATIONCapacity is 5 PINTS. Engine and Chassis

are lubricated by the same oiI. Use onlyMotor Oils, do NOT use transmission oilsor greases.For Summer:

Mobiloil AF (SAE 30)For Winter:

Temperature range from 32o to 10o F.Use Mobiloil Arctic (SAE 20-20W) L00 andbelow, Mobiloil Special (SAE -10W -30)

Oil is checked by having tractor level.Remove Try-Cock Wing Nut on Chassis. Ifoil runs out, youhave enough. When filling,be sure to fill only r:ntil oil runs out.REPAIRSCrqnkpin

Crankpin dlameter is L.497 /L. 498, andthe Connecting Rod big end Bushing must bereamed to 1.500. The Crankpin diameterhas been changed. We suggest you acou-rately t'rrriket' the Crarrkpin. If less thanL.497, rearn the Bushlng to give .002/.003clearance.

Connecting Rod has bronze Bushing,pressed into Rod. Crankpin into Flywheelis a . 001 to . 003 interference fit. An inter-ference fit means that the Crankpin is ac-tualty .001 to .003 larger tban the hole inthe Flywheel. The Crankpin must be a verytight fit to keep it from turning. Thereforethe Cranl*pin is pressed into the Flywheel.(Note that Flywheel must be pressed tighUyto shoulder on Crankpin.)

Piston, Pin, Rings

Piston is equipped with three rings.1 Chrome Compression Ring

(Ring Gap: .01-2 to .020)L Steel Compression Ring:

(Ring Gap: .008 to .016)1 Oil Scraper Ring:

Old Styte Ifon Ring, (Gap:.008 to .016) or New StyleThree Piece Chrome OilRing: Ring (Gap " 015 to .055)

We have recently put into production anew, chrome-plated steel, three piece oilring,part number LH-546. Both our labora-torytestsandfieldtests show this ring muchs up e r i o r to the old style cast iron ring.Therefore, even though it is more expen-sive, we are using it now in all productior4andthe rings ate avanlable on repair orders.

The rings will be furnished in standard,"010, .020. and.030 oversizes.

The standard size canbe used up to .009oversize, the .020 up to .029 oversize, andthe .030 up to .039 oversize.

We recommend the use of the ring es-pecially when rrsmokingrr occurs in the equip-ment, and yet the compression rings arestill in good shape. Quite often, the simpleexpedient of changing the old cast iron ringto the new style will stop the I'smokingilcompletely.

Of course, it is better to refinish thecylinder bore, and ude the proper size ofoversize pistons and rings. The LH-546new three-piece oil ring should have from.015 to " 055 end gap for the two flat seg-ments. In contrast, the old style cast ironoil ring should have " 008 to .01-6 end gap.The LH-548 top chrome compression ringshould have .012 to .020 end gap. Measuretheendgapwitha feeler Sauger with the ringr e m o v e d from the piston and held in thecylinder bore"

Installation of the new ring, though notdifficult, must be carried outwith care,following the instructions given below care-fully and accurately.INSTRUCTIONS FOR I}TSTAJ,LTNG THREE-PIECE OIL RING

Page Five

1. Place stainless steelexpander spacer ingroove with ends butted.2" Install steel segment on top side of ex-pander spacer with gap of segment approxi-mately 90o beyondgap of stainless steel ex-pander spacer, making certain that the ex-pander spacer is still in a butted position.3. Install second segment on bottom sideof the e xp an d e r spacer with segment gapapproximately 90o from the expander spacergap in opposite direction from which the topsegrnent has been installed.4. Recheck assembly - rings should be freeto move in the groove, however, a slightdrag will be evident because of the sidesealing action of the ring as sembly. BESURE EXPANDER SPACER REMAINS INBUTTED POSITION.5. When pistons are ready for installationin the cylinders, compress rings carefully,and slip the cylinder down over piston andrings. Since the Cylinder is chamfered, aslight twisting motion will allow this pro-cess to be carried out easily, without forcing.

If any difficulty is encountered, the ringsshould be checked for correct installation inthe groove.

SEGMENIGAP

EXPANOERSPACERGAP

SEGI,{ENTGAP

PistonPin(WristPin) is . 859 diameter.Small end of Connecting Rod holds BronzeBushing which should be reamed to .860/-.861.

Piston Pin (Wrist Pin) is a solid fit inthe Piston. It is a light push fit in a hotPiston.

Piston skirt clearance is .003/.005,measuredwith a FeelerGauge at right anglesto the Piston Pin.

To determine if cylinderneeds reboring:1. UseanyPiston Rlng, inserting it in thecylinder L/2 Lnctr from the bottom of thebore, using the piston to square it with thesides. Measure the Gap with Feeler Gauge .

2, Use the same ring, L/Zlnch from thetop of the Cylinder, seated true with piston ,measure the gap.

3. Subtract smaller reading from largerreadi:rg, then dlvide by 3.4. If resultis more than .006, we recom-mend the cylinder be rebored to the next.010 over size. Pistons and Rings are fur-nishedinoversizes: .005, .010, .015 .020, .025.030. Diameter of Standard Cylinder is3.2545/3.2535.Crankshaf!

Drive Pinion Shaft Bushing should bereamed to 1.0005/0.9995. The Drive Pin-ion Shaft is factory toleranced to .9975/-.9965, which gives an overall clearance of.002/.004. (Drive Pinion Shaft Bushing isfurnished in .005, .025 O. D. Oversize) .

(DrivePinionShaJt Bushing is fitted in-to hot crankcase.)

The Timing Pinion Shaft is fitted intotheBall Bearing at rnanufactured tolerance.Camshafts

Camshafts must be timed very accu-ratelyto engine forbest results. See timingdiagram.

On Tractors manufactured before Sep-tember 1955, the appearance of the Cam pro-files in relation to a straightedge will varyas shown in the same Timing Diagram. Onall rnodels, when checking Timing, carefullyobserve the Camprofile and position. If notas shown in sketch C, replace Camshafts.

Camshaft Bushings are reamed with a. ?50 reamer. Camshaft diameters are pre-cision ground to .7480/.7490, Clearanceshould be .001 to .003.

NOTE: Bushings shouldbe line reamed,in place in bolted-together Crankcases.Crankcases must be replaced, when neces-sary, in Pairs.

?age Six

II

LIt-I L

I

Represents timinModel L for mantiming marks, prelation to straig

Represents timing set-up previously carriedout with cam profile, only, changed. Wentinto production approximately I8 months ago.

CORRECT appearance of cam profile in re-lation to straightedge, with NEW camshafts.(Keyway position has been changed 50. )

When repairing older tractors, use new Camshafts, which will give the appearance shown in (C). Tocheck if Valve Timing is correct, (Engine cold) set Valve Tappet at . 00Lb (Cigarettepaper). Cylinder headoff. Intake valve should just start to open at the Top Dead Center of E><haust stroke. After piston passesTop Dead Center going down on the Intake stroke the exhaust valve shouldjustclose at5/32tt fromTop DeadCenter. After checking, re-adjust tappets to proper clearance before running englne.

used onObservecams in

systemyear s"

sition oftedge.

PAGE SEVEN

Valve SystemGrind Valve Seat Angle 45o degrees.

Seatmust be square with Valve Guide bore.Seat width dimensions are 3/64" to 5/64",Finish with Valve Grinding Compowrd toinsure good seat and compression. Rough:Government Grit g rade L20 (E); Finish:grade 280 (A).

IfValve SeatexceedsS/64" on one side,use a 600 Valve Seat Reamer, to removeexcess valve seat width.

Timing of V al v e s is accomplished byCa:nshaft timing. See trCamshafflr.

Valve Tappet clearance, engine COLD,is .0L2, exhaust, .012 intake, obtained byadjusting Valve Tappet.

Valve Clearance inExhaust Valve Guideis factory toleranced.Intake Valve clearanceis . 002,/. 004.

Valve Plunger is .7485/.7495. ValvePlunger Guide is reamed to ,750/.75L.Clearance should be .0005 to .0025. (Tightslip fit. ) (To prevent oil leakage aroundvalve plturger, maintain this clearanee.)

Valve Sleeve Gasket should be perma-texed or shellacked.

Replace Valve Springs if you caJI squeezetogether with one hand.Oil Pump

Oil Pump is a precision gear PumP.Fits and tolerances must be held closely toineure good oil supply at essentlal lubrica-tion polnts.

Oil Pump Bushing should be reamed to7/L6,, (.4373/.4388). The oil Pump MasterGear Saft is toleranced at .4363/.4368,which means clearances must be held to.0005 to .0025.

Oil Pump Gears must be a snug fit lnthe Oil Pump Cap.To Accomplish:1. Pressldler Gear Pln. into place bystarting it fir the Crankcase, placing the IdlerGearoverit, and pressing it until it is flushwtth the top surface of the Idler Gear.2. P1ace Dowel Pin in Crankcase. As-sembleOilPump Gears and OiI Seal in Cap.Check that the Gears are flush with surfaceof Oil Pump Cap with the Gashet ln place.3. Assemble to Crankcase, using a g/L6"socket and speed handle on the O i I P u mpIdler Gear Pinion Shaft Nut.4. After cap is seated, wash out and checkby putting oil in large opening and turningspeed handle to check pumping action andwash out pump.

Note that the Idler Gear Stud must bechecked carefully to see that it is the sameheight as the gears. Also, be sure to checkOitPumpGearstobe sure they are the samethickness and that they are free of burrs.Never put new gears in an old Cap"

Tolerances of Oil Pump Gears are:Diameter (O.D.) .746 / .z+z Thickness,"384/ "585.

TROUBLESIIOOTINGTractor Englne Falls to Start

Probable causes are, ln order of theirfrequency:

1. Out of Fuel2, Fuel shut off at sediment bowl3. Stuck valve4. Fouled or out of adjustment Spark

Plug.5. Magneto failure6. Timing failureTools needed for this service work:

Feeler Gauge, Screwdriver, light Ball PeenHammer, L/ztt 6 pt Socket and Wrqnch,L5lL6" Spark PIW Wrench, can of penetratingoil (may substitute t/Z ana 1/2 No. 10 Oiland Kerosene).TO CORRECT:

BiA( K ARFASHows ExcEs9

Page Eight

L. Check Gas Tank, fill iJ empty.2, Check Shut Off Valve at Sediment

Bowl, to make sure it is open wide.3. Turn engine over slowly by HAND,

to see if engine has compression. If engineHAS COMPRESSION,

4. Remove Spark Plug, checkfor for.rl-ing, burning, wetness, Remove carbon,dry if necessary, reset at .033. If SparkPIug appears to need replacement, replacewith Autolite TT-10.

5. IfyouDO NOThave COMPRESSION,you usually will have a valve stuck open.The primary sympton is a sudden (usuallyovernight) 1o s s of compresslon. Lack ofcourpression due to Ring Trouble is a gra-dual loss, getflng progressively worse, andcharacterizedby oily smoke fromthe extraustfor someperiodbefore actual complete com-pression loss.

6. Remove cylinder head. (ObserveGasket. Replace if necessary).

7, Check to see if there is any bit ofcarbononthe Valve seatwhich might be pre-venting the Valve from completely closing.If so, removeandgrind Valve to a good seatif necessary.

8. If no carbon bits are present, floodthe Valve and stem with penetrating oil. Letrrsoakt' a few minutes, flood again. Using ascrewdriver in the slot on top of the Valve,beginworkingtheValve by attempting to ro-tate the valve. If this is unsuccessful, floodagain with penetrating oil, (IMPORTANT:Ttrrn engine over until impulseclicks-tobesure you donrt break Cams.) Then tap theValve ltehtly with the hammer. Again usethe Screwdriver" The Valve will usuallybreak loose in a very strort time. Continueto work untll lt is perfectly free, and risesandfallswiththe turning over of the engine .

Chronic cases of Valve sticking can beeliminated by one of the Bronze VaLve Guides.

9. Observe the seating and the actionof theValves. If a Valve Grinding Job is in-dicated, recommend it to the customer atthat time. If Valve s need replacement,recommend it.

10. Occaeionally a Valve is stuckclosed. This is rare, however. The symp-toms will show up immediately when youattempt to turn the englne over by HAND.The Englne will "stop deadt' at a certainpoint. Reversing the direction of hrrn, the

Englne will stop again at the same point lnthe firing cycle. The procedure is exactlythe same as for releasing a Valve that isshrck open. WARIiIING: Never attempt totest for a shrck valve by turning the englneover in any manner except by HAND. Tura-inganEngtne over with a strap, or by forc-ing, when a Valve is stuck closed will re-sult in fracture of the Crankcase, necessi-tating replacement.

11. If the Engine has compresslon,the Spark PIug is ln good order, etc., testthe spark"

L2. The Spark should jump at least3/t6,'when tested by putting the end of theMagneto Cable connectionthis distance fromametalobject. (Usually the Cylinder Head) .

13. If the Spark ls weak, it is usuallycaused by condensatlon within the Magneto.Remove the Cap, dry out the Magneto. (Youcan observe the wetnesswhenthe Cap is re-moved.)

L4, Normally, if the Magneto is notfiring correctly, routinely replace Coil,Condenser, and points.

15. If itis impractical, or undesirable,to replace all of these parts, observe thePoints first, to make sure they are breaking,and are not burned or dirty.

16. If the Points are dirty or wet, cleanby using a piece of hard paper. (A piece ofpaperfrom a "slickt' magazine works well.)Spread the Points by hand, release on thepaper, and pull the paper through.

L7, Adjust the Polnts. On Wico Mag-netos, the setting is .015: on Bendix-Scin-tilla, . 018.

18. To adjust, release the adjustingscrewby turning the locking screw slightly.Make the adjustment by turning the adjustingscrew, then lock in place with the lock screw.See separate Magneto instructions. If youreplace, remember to lubricate the feltwasherontheWico Magneto. BE SURETIMING MARKS ARE LINED UP when youmake this adjustment!

19. If the Spark you get is very red,instead of blue or yellow-white, it is pro-bably the condenser. A bad condenser willusually allow the E ngine to start, but theEngine wiII backfire and spit, and quit. If

Page Nine

thereisno sparkatall, lt ls usually the Coil.

20. ToreplacetheCoil, Condenser, ordo any other work on the Magneto, it ls bestto remove the Magneto from the Tractor.

2L. To remove, turn the Engine overbyhandrrntilthe Timtng Marks are lined up.DO NOT MOVE THE ENGINE UNTIL YOUHAVE REPLACED THE MAGNETO. WhenYou are ready to replace the Magneto, llnethe Timing Marks onthe Magneto and replaceIt. The englne will be Tlmed the same as itwas when you removed the magneto.

22, Loosen ttre Bolts from the bottommounting, and remove the magneto, pullingstralght back (away from engine) so as tonot disturb the Tlming.

23. If the Magneto is furnishtng a strongSbark, and all other factors mentloned areconect, then the difftculty is probably inthe ttmtng. See "Tlmlng Model L Englnerr).

IINUSUAL FAILURES

24. Clogged Gas Llne: You can usuallyspot thts by observing the earburetor.

25. Alr pocket in the G a s I ln e: Oc-caslonally, when a User rune completelyout of gag and reftlls the tank, a "pocket" ofalr ls trapped ln ttre system. If the Englnels not getttng gas, observe the SedlmentBowl. If tt ts fiill, thore ls no alr pocket.If the Sedtment Bowl gas level ls downsltghtly, the alr pocket ls preeent. Tocorrect, wrscrewthe nut that holds the gtassbowlenowh to break the vacuum ln the sys-tsm. The Bowl wtll flII' and you have cor-reotBd the condltlon.

26, A bufld-up of mud or dlrt on theMagneto Etop Button, or a bendlng of theButton whtoh keeps lt ln contact wlth theMagneto. Thls, of course, shofts out theMagneto and allows no sparks to reach theEnglne.

27, Very rarelY a User forgets to re-place the oap onthe Magneto connection to the

Spark PIug, and coincidentally the hood willbe bent down. Tttts wtll short the Magnetoout also.

28. Carburetor adjustment may causehard starting, but rarely causes a tractornot to start at all. Usually the tractor wlllrun, even if adjustment ls off. See frCarbu*retor Instnrctionsrr.

ALIGNING FLYWHEELS:Method 1

Dealers who desire to check Fly WheelBalance should acquire the following items:

1 Anderson Balancing Way Size 1-AManuJactured by Anderson BrothersMfS. , Co., Rockford, Illinois.

1 Piece Cold Rolled Steel 3/4tt Dia.about 3" Iong weighing eight ounces.

To Check Fly Wheel Balance:

L. Remove piston from connecting rod.

2. Put the FIy Wheel Assembly on balanc-ing ways with the corurecting rod hangingdown.

3. Insert eight ounce weight in wrist pinbearing" This will give the equipoise neces-sary for good engine operation.

The Crank Bearing producesalightdampening action on the operation and due tothis fact good balance depends somewhat onthe judgment of the operator.

Give the assembly a slight rolling startin different directions and position. If inyour judgment there is a heavy spot, correctthis by removing some metal, (preferably bydrilling, ) from the side of the fly wheel rim.

Notknowing whether this error is in oneor bothwheels it wouldbe better to divide themetal removed and take some from both.Method 2

If youdonot have ordo not wish to obtainthe Balancing Ways, a field method that is

Page Ten

satisfactory is as follows:

1"Aligning Flywheels by eye as closely as

possible, and prdss in place"

2. Using a machinest Depth Gauge andSquare, place it on the flywheels so that therrsquarerr part of the depth gauge is on themachined flat face of the flywheel' and theGauge part is lying along the outside diameterof the Flywheel.s, parallel to the centerlineof the bore in the flywheel.

3. By inspection, determine if the flywheelsare aligned. If not, move by some conven-ientmethodthe flywheels until this measure-ment shows that the flywheels are aligned.This method is close enough for all practicalpulposes.

Method 3

If you have a Reel Mower Grinder, mostmodels have centering spindles"

P1ace the Drive Pinion Shaftandthe Tim-ing Pinion Shaft in the centering spindles.

Clamp or otherwise attach a piece of flatsteel to the Grinder frame, in such a manneras to allowyou toplace an f rtrdicator Dialil onthe steel. An Indicator DiaI is one that willshow out-of-roundness in thousandths.

Then, by putting the pointer of the Indi-cator in contact with the OD of the Flywheel,and rotating the flywheel assembly slowly inthe Centersryou can determine quickly if theflywheels are out of alignment or out of bal-ance.

Page Eleven

8"GRA/ELY.ZENITH 68.7CARBURETOR NO. 1g/246 GRAVETY NO. Io87a AI)

SERVICE PARTS L ISTEffective: ApriT 1967

;

8rd3:

%43.:..r.rl.'..t :r -,..1,': ...l:.'- r. . .,r,.,.-!t

*L d*"q__ : trF-ie +l

4',

GRAVELY ZENITH 68-7No. 13246 No. 10 87841

PARTS LIST

Quan. Part No.

L-301-BB 12-13246a o 7(T-48 -9T-52-57c-131-38T-21-S-10T-8-S-10-11T-8-S-8-7c 29-7603C-24-7 H x 2c-27-17 6T- 3 14-B- 5-4c-46-6c-111-205c-85-28c-r20-4c-742-68

Photo No.

16

4778

46484951IJ11

3254

161519

T-301-S-10-10 25T- 8- S- 8- 12B-3-121-A-1T-57 -4C- 13 1-4x2CR- 3 7- 1x1T-21-S-8c-108-238-8T-8-S-8-6c-109-60c- 140- 58c- 101- 79T-315-B-5-4c-110-7c-7 7-21T-56-23T-9r-23B 38-74-t8c-52-7 -25T-56-24c-55-6-12c-66-114-40T- 5 6-48c-77-18-20c-81- 77 -35T-56-20c- 181-329K 2033

Name

GasketThrottle Body AssemblyThrottle Shaft BushingRubber Sea IWa sherP1ug, Shaft HoleNutScrewScrew

(iOO-13 A F) Throttle Shaft & Lever Assy.Clamp Lever AssemblyThrottle PlateThrottle Plate ScrewIdle Adjusting NeedleS pr ingFloat AssemblyFloat AxleBody GasketBowl to Body ScrewThrottle Stop ScrewFuel BowlFeet Sea 1

Reta inerCuP PlugNutChoke Shaft & Lever Assy.ScrewChoke Bracket & Clip Assy.Bracket Mounting ScrewChoke PlateChoke Plate ScrewsClipMain Jet AdjustmentMain Jet Adjustment Washer1/8" Plug (use 701-P)VenturiMain JetL^/a sherIdle JetDischarge JetWa sherWall VentFuel Valve Assy.Fuel Valve WasherGasket SetRepair Kit

7220)1J/

2741363132&3428303940352122264523241443424418t7NSNS

A G RA/E tV ffimmrth G8 Series Carhuretor

ZENITH 68 SERIES CARBURETORFOR GRAVELY TRACTORS

The Zenith 68 Series carburetors are of updraft singleventuri desigrr. These carburetors are I'balancedil andt'sealedt', and the semi-concentric fuel bowl allowsoperation to quite extreme angles without flooding orstarving.

FUEL SUPPLY SYSTEM(See Fig. 1)

The fueL supply system is made up of the threaded fuelinlet, the fuel valve seat, fuel vaLve needle, float andfuel bowl.

The fuel supply line is connected to the threaded inlet.The fuel travels through the fuel valve seat and passesaround the fuel valve and into the fuel bowl The levelof the fuel in the fuel chamber is regulated by the floatthrough its control of the fuel valve. The fuel valvedoes not open and close alternately but assumes anopening, regulated by the float, sufficient to malntaina proper level in the fuel chamber equal to the demandof the engine according to its speed and load.

The inside bowl vent as illustrated by the passageoriginating in the air i.ntake and continuing through tothe fuel bowL, is a method of venting the fuel bowlto maintain proper air fuel mixtures even though theair cleaner may become restricted. This balancing isfrequently referred to as an t'inside bowl ventt'.

EOWL VENT

FUEL INLET

Figure 1 FUEL SUPPLY SYSTEM

IDLE SYSTEM(See Fig. 2)

The idle system consists of two idle discharge holes,idle air passage, idle adjusting needle, idle jet, andfuel pick-up passage.

The fuel for idle is supplied through the main jet to a well

directly below the main discharge jet. The pick-upp:rssage is connected to this well by a restricted drill-ing at the bottom of this passage. The fuei travelsthrough this channel to the idle jet calibration. The airfor the idle mixture originates back of (or from behind)the main venturi. The position of the idle adjustingneedle (normally one turn from its seat) in this passagecontrols the suction on the idle jet and thereby the idLemixture. Turning the needle in closer to its seat re-sults in a greater suction with a smal,ler amount of airand therefore a richer mixture. Turning the needle outaway from its seat increases the amount of air and re-duces the suction, and a Leaner mixture is delivered.The fuel is atomized and mixed with the air in thepassage leading to the discharge holes and enters theair stream at this point

DISCiIARGE HOLES

.-- IDLE AIR(From behiid Venturi)

IDLE ADJUSTINGN EEDLE

THROTTLE PLATE(ldle Posit;on)

IDLE FUEL

MAIN JET

PICK.UP PASSAGE

MAIN JETA DJUSTMFNl

Figure 2i-):-:-t-,1:,t:::t

HIGH SPEED SYSTEM(See Fig. 3)

The high speed system controls the fuel mixture atpart throttle speeds and at wide open throttle. Thissystem consists of a venturi, controlling the maximumvolume of air admitted into the enginel. the main jet,which regulates the flow of fuel from the float chamberto the main discharge jet; the well vent, which main-iains uniform mixture ratio under changing suction;rnd engine speeds; and a main discharge jet, whichdelivers the fuel into the air stream.

The main jet controls the fuel delivery during the partthrottle range from about one-quarter to full throttleopening. A main jet adjustment permits a limited con-trol of the main jet fuel. Ordinarily an adjustment of2-L/4 turns from its seat will give proper mixture.To mainLain a proper mixture ration a smaLl amountof air is admitted through the well vent into the dis-charge jet through the air bleed holes in the dischargejet at a point below the ievel of fuel in the meteringwell.

At high speeds the fuel flows from the fuel chamber

ADJUSTMENl

throug'h thc main jet and into the main discharge jetwhere it is mjxed wilh a.ir aclmitted by the well vent,and the air-fucl mixtr"rre is lhen discharged into theair stream of the carburetor,

Fisure u r:n-tt--ttti-,,;tt-rtCHOKE SYSTEM(See Fig. 4)

The choke system consists of a valve mounted on ashaft located in the air entrance and operated exter-natly by a lever mormted on the sha-ft. The chokevalve is used to restrict the air entering the carbure-tor. This increases the suction on the jets whenstarting the engine. The choke valve is of a "semi-Automatic" type, having a poppet valve incorporated inits design, which is controlled by a spring.

The poppet valve opens automatically when the enginestarts and admits air to avoid over- choking or floodingof the engine. The mixture required for starting isconsiderably richer than that needed to develop powerat normaL temperatures. As the engine fires and speedand suction are increased, the mixture ratlo must berapidly reduced. This change is accomplished throughadjustment of the choke vaLve and the automatic openingof the poppet valve to admit more air when the enginefires ,

MAIN JE'TADJUSTMENT

Figure 4: CHQ\E SYSTEM:

AND REPAIR PROCEDURE

DISASSEMBLED VIEW

(a) The disassembled view will identify the variouscomponent parts and show their relation to

assembly. Use the disassembled view withthe identifying part numbers to identify and 1o-cate parts when performing the disassemblyand reassembly operations.

SELECTION OF TOOLS AND REPAM PARTSKIT

(a) The use of the proper Zenlth tools and the properrepair kit is essential if the best service andrepair procedure is to be performed on thecarburetor.

(b) Zenith Special ToolsC-161-83 Main Jet WrenchC-161-10 Plug WrenchC-161-9 Main Discharge WrenchC-161-82 Fuel Va-lve Seat WrenchC-L6L-25 Shaft Nut ToolC-L6L-72-I Bushing Driver

(c)Repair Kit, part number K12108 is requiredto repair carburetor assembly 12108.

SEPARATE CARBURETOR BODIES

(a) Remove the four assembly screws (25) usinga screwdriver.

(b) Separate the throttle body (6) from the fuelbowl assembly (20).

DISASSEMBLE THROTTLE BODY

(a)Remove float axle as follows:

(1) Press screwdriver against float axle (15)at slotted side of float hinge bracket andforce through hinge bracket.

(Zt Remove float axle (15) completely withfingers from opposite side and removefloat (16).

(b)Remove fuel valve needle (J-8).

(c)Remove the assembly gasket (19).

(d)Remove the venturi (45).

(e)Remove the fuel valve seat (18) and fibrewasher (1?) using Zerilh Tool No. C161-82.

(f) Remove the idle jet (14) using a small screw-driver.

(g)Remove the idle adjusting needle (5) and frictionspring (4).

(h)Remove the throttle plate (3), screws (2), sbaftand stop lever assembly (13), as follows:

(1) Unscrew throttle stop screw (12) until

B.

c.

D.

SERVICE

N DISCHARGE JET

A

PaEe 2

threaded end is flush with lever (L1)

(2) Make match marks with file on throttlebody (6) and all levers to act as a guide toassemble these parts in the same positionas removed.

(3) File off the riveted or peened end of thethrottie Plate screws (2)'

NOTE: When such screws are riveted or peenedthe threaded end of the two screws must be filedflat before removal to avoid breakage or strip-ping of threads in the shaft. In some cases itmay be necessary to use a smaLl (1,/4") roundfile and cut slightly below the surface of theshaft because of a slight counler bore aroundthe screlv hole.

BE SURE TO AVOID STRIKING AND CUTTINGTHE SIDE OF THE THROTTLE BODY BORE ORTHE THROTTLE PLATE WHEN FILING THESCREWS.

(4) Remove the screws (2) and pull out thethrottle plate (3).

(5) Remove the throttle shaft and stop leverassembly (3).

(I) Remove the throttle shaft packing (8) and pack-ing retainer (9) from the throttle body shaft asfollows:

(1) Screw a 5/LGt' fine thread taper tap intopacking retainer (9) urtii it is firmly seated.

(2') Insert long punch or rod through oppositeshaft hole and drive punch against the endof the tap until retainer (9) is free of thebody. (Repeat operation for other packingand retainer )

NOTE: Do not disassemble the throttie plate,(3), throttle shaft and stop lever assembly (1-3),throttle packing (8), and packing retainer (9)from the throttle body (6) unless the throttlesha^ft is bent or otherwise damaged or unlessthere is damage to any of the other componentparts of the throttle assembly.

E. DISASSEMBLE FUEL BOWL BODY

(a)Remove the main jet adjusting needle assembly(21) and fibre washer (22) using a I/2" wrench.

(b)Remove the drain plug (hex) (26) from bottomof fuel bowi (20), using Zenith Tool No. C-161-10

(c)Remove main jet (23) and fibre washer (24) withZenit}r Tool No. C161-83.

(d)Remove main discharge jet (43) and fibre wash-er (42) from center of large opening in ma-

chined surface of the fuel bowi (20) withZenith Tool No. C161-9.

(e)Remove well vent jet $\ from center of largeopening in machined surface of the fuel bowl(20) with a small screwdriver.

(f) Disassemble choke as follows:

(1) Make match marks with a file on air intakebody (20) and lever (31) to act as a guldeto reassemble these parts in same posi-tion as removed,

(2) Remove the choke shaft thrust washer (49)and taper pin (41).

(3) Remove the choke plate screws (40) andremove the choke shaft (31) and chokepiate (39).

NOTE: This earburetor employs choke shaftpacking washers (37) and packing washerretainers (27) in the choke shaft holes aroundthe choke shaft. The disassembly of thesepacking washers and retainers should be per-formed in the same manner as the disassemblyof the throttle shaft packing washers and re-tainers which is described in detail in the dis-assembly of the throttle body.

NOTE: DO NOT DISASSEMBLE THE CHOKELEVER AND SHAFT (31) AND PLATE(39) UNLESS THERE IS DAMAGE TO ANYONE OF THE ABOVE MENTIONED PARTSOR DAMAGE TO ANY OF THE OTHER COM_PONENT PARTS OF THE CHOKE ASSEMBLY.

9leaning and Inspection of Parts

CLEANING PARTS

(a) Clean all metal parts thoroughly with cleaningsolution and rinse in solvent.

(b)Blow out all passages in the air intake and fuelbowl casting (20) and throttle body (6).

NOTE: Be sure aLl carbon deposits have beenremoved from throttle bore and idle dischargeholes. It is advisable to reverse flow of com-pressed air in all passages to insure that alldirt has been removed. Never use a wireor fuill to clean out iets.

INSPECTION OF PARTS

(a) Float Assembly. Replace float assembly (16)if loaded with gasoline, damaged, or if floataxle bearing is worn excessively. Inspecttop side of float lever for wear where it con-tacts fuel valve needle.

NOTE: Such wear can affect the float level.

A.

Page 3

B.

(b)

(")

(d)

(e)

(f)

(c)

(h)

Float A-rle. Replace if any wear can bevisually detected on the bearing surface.

Fuel VaLve Seat and Needle Assembly. Alwaysreplace fuel vaLve seat and needle (18) be-cause both parts wear and may cause improperfloat 1evel.

Idling Adjustment Needle and Spring. In-spect point of needle (5). This must besmooth and free of ri.dges.

Throttle Plate. Inspect plate (3) for burrsor damaged edges. Never clean a throttleplate with a buffing wheel or sharp instru-ment.

Choke Plate (39). Inspect for bends, burrsor damaged edges.

Choke Shaft. Check bearing surfa.ces forwear; see that shaft (31) is straight.

Gaskets: Replace all gaskets and fibrewashers every time the carburetor is dis-assembled.

(i) Throttle Shaft. Replace if throttle shaft (48)shows evidence of wear on the bearing sur-faces.

REASSEMBLY

FUEL BOWL BODY

(a) Choke Assembly

(1) lnstall the choke shaft packlng (37) andretainers (27) in fuel bowl body (20) asfollows. Use bushing drlver tool Zenithct67-72-7.

(2) Assemble packing (37) and retainer (27)and place completed assembly on bushingdriver tool with packlng facing small endof too1.

(3) Insert sma1l end of tool into choke shafthole, start retainer (27) irfto eorurter borein body (20) and lightly drive retainer (27)into body (20) until it is flush with ma-chined surface.

(4) Insert ehoke shaft and lever (31) into airintake (20).

(5) Insert choke plate (39) into air intake (20).

NOTE: Be sure the choke plate (39) is 1o-cated in the same position in the air intake(20) as regards the poppet valve as when itwas disassembled.

(6) lrstall choke plate screws (40) using a

small screwdriver.

(7) Install the choke shaft thrust washer(a9) and taper pin (41).

NOTE: Use the "Match Marks" put on thechoke lever (31-) and air intake body (20)during disassembly to properly align thechoke assembly during reassembly.

(b) Install main discharge jet (43) and fibrewasher (42) in fuel bowl (20) and tightenflrmly with Zenith Tool No. C161-9.

(c) Install well vent jet ${ in fuel bowi (20)and tighten with a small screwdriver.

(d) Inshfl main jet (23) and fibre washer (24)using Zenith Tool No. C161-83.

(e) lrstall the drain plug (hex) in threaded passagebottom of fuel bowl using Zernth Tool C161-10Wrench.(f) Install main jet adjustment (21) seat lightlyand back out 2-L/4 turns.

THROTTLE BODY

InstalL the two new throttle shaft packings(8) and retainers (9) in throttle body (6) asfollows. Use bushing driver tool ZenithcL6L-72-L.

(1) Assemble packing (B) and retainer (9)and place completed assembly on bush-ing driver tool with packing facing smallend of tool.

(2) Insert small end of tool into throttleshaft hole, start retainer (9) intocounter-bore in body (6) and lightlydrive retainer (9) into body (6) untilit is flush with machined surface.

NOTE: The packing retainer (9) must beflush with machined surface or slightly be-low to avoid striking throttle lever (11).

Install the throttle shaft and stop lever as-sembly (13), throttle plate (3), screws (2)as follows:

(1-) Insert the throttle shaJt and stop leverassembly (13) in throttle body (6).

(2) Rotate throttle shaft (48) to wide openposition, insert throttle plate (3) androtate to closed position hoiding theplate in positi.on with fingers.

(3) Start throttle plate screws (2) and tightenwith small screwdriver, being surethat the throttle plate (3) is properlycentered in the throttle body bore.

B.

(a)

A.

(b)

PaEe 4

NOTE: The screw holes in the tbrottle piateare off center. Start tb.e side of the throttlepla'te with the shortest distance between thescrew holes and beveled edge into the shaftfirst. The throttle plates are made wlth twoopposite edges beveled r.o fit the throttle bodybore when the plate is closed. The throttleplate will not close tightly if instal.led upsidedown. To properly center tJre plate in thethrottle body bore, the screws should bestarted in the shaft and then with the plateclosed, it should be tapped on the mountingflange side. Pressure on the plate must bemaintained with the finger rurttl the screwsare tightened. When properly installed, theside of the throttle plate farthest away fromthe motrnting flange will be aligned wlth theidle discharge holes when the plate is closed.

(c) Install idle adjusting needle (5) and frictionspring (4) in threaded passage on side ofthrottle body. Seat lightly with screwdriverand back out one full ttt.rn.

(d) Instarl idle jet {4).

(e) Install fuel valve seat (18) and fibre washer(17) using Zenit}: Tool No. C1"61-82.

(f) Place new throttle body to fuel bowl gasket(19) on machined surface of fuel bowl cover(6), making sure venturi flange is set inthrottle body recess below gasket.

(g) Insta"tl fuel valve needle (l-B) in seat (18)followed by float (l-6) and float axie (15).

SEE FIG. 5 The !'A" dimension should beL 5/32tt plus or minus 3/64".

(h) Float Level. Check position of float as-sembly for corect measurement to obtainproper float level using depth gauge.

NOTE: Do not bend, twist or apply pressure onthe float bodies.

c.

(1) With bowl cover assembly (6) in aninverted position, viewed from free endof float (16) the float bodies must becentered and at right angles to the ma-chined surfaces. The float setting ismeasured from the machined surface(no gasket) of cover to top side of floatbodies at highest point.

(2) Bending Float Lever. To lacrease ordecrease distance between float bodyand machined surface use long nosedpliers and bend lever close to floatbody.

NOTE: Replace with new float if position isoff more thar. L/!6tt.

(i) Insert venturi (45) in throttle body bore,large opening first. Making sure venturiflange is set in throttle body recess belowassembly gasket.

ASSEMBLE CARBURETOR BODIES

(a) Assemble the two completed bodies (6 and20) and four screws (25) and tighten screwsevenly and firmly.

(b) Hold the throttle lever (11) in a clos.edposition and turn the throttle stop screw(12) 1r:. rurtil it just contacts the stop onbody (6), then turn screw (L2) in J,-L/zadditional turns.

E BAV E LT.WIC(ISPECIFICATI(ll{

Service Parts

3-gEe.H-$-sozz

'o t-

-x6533

-56 18

5633x5524

MAGl{ET(lxH - 2533Iist

646s (+)

-xl1788

- | 1786

ffi_r633-x

il637

7569

'9lGRAVELV\J rrtAcroFrsiA Division ol Studebaker Corporation

DUNBAR, WEST VIRGINIA 25064

SERVICE INSTRUCTIONS ForWico Mogneto Specificotion XH-2533

TIMINGThe magneto is properly timed to the en-

gine at the factory. If it becomes necessary toretime the magneto to the engine, refer to theinstructions in the engine instruction book.

LUBRICATIONThe only iubricating point in the magneto

is the cam wiper felt, 5077. This felt, whichIubricates the breaker arm at point of contactwith the cam, should be replaced wheneveritisnecessary to replace the breaker contacts.IMPORTANT

Incorrectly adjusted spark plug gaps causemagneto failure more frequently than any othercondition.

Sparkplugs should be inspected at frequentintervals, the size of the gap should be care-fully checked and adjusted and the plugsthoroughly cleaned.

All oil, grease, and dirt should frequentlybe wiped off the magnetor lead wires, and sparkplug insulators. Keeping these parbs clean andthe spark plugs properly adjusted will improvethe engine performance and at the same timewill prolong the life of the magneto"

MAGNETO COVERThe magneto cover, X6533, can be removed

by loosening the four screws, 5622, which holdit in place. When replacing the cover be surethat the cover gasket, 5618, is in its properplace.BREAKE R CONTACTS-REPLACEMENTAND ADJUSTMENT

The breaker contacts should be adjusted to.015r! when fully opened" To adjust the con-tacts, loosen the two clamp screws, 5900,enough so that the contact plate can be moved.

hsert the end of a smaLl screw driver inthe adjusting slotand open or close the contactsby moving the plate until the opening is .015?r,measuringwith afeeler gauge of that thickness,tighten the two clamp screws.

To replace the contacts remove the breaker,the spring clamp screw, 6017, the breaker armlock and washer, 3219, and 42L0, then lift the

breaker arm from its pivot.Remove the spacingwasher, 5717, and the two breaker plate clampscrews, 5900. The breaker plate can then beremoved.

If the contacts need replacing it is recom-mendedthat both the fixed contact and the break-er arm be replaced at the same time, using re-placement breaker set X5996.

After assembly the contacts should be ad-justed as described above. The contacts shouldbe kept clean at aLL times. Laequer thinner isan ideal cleaner for this purpose" Use WICOtool 5-5449, to adjust the alignment of the con-tacts so that both surfaces meet squarely.CONDENSER

To remove the condenser, X5614, firstdisconnect the condenser lead by removing thebreaker arm spring screw, 6017, then removethe two condenser clamp screws, 5411, and thecondenser clamp 5532" When replacing the con-denser make sure it is properly placed and thatthe clamp screws are securely tightened.COIL AND COIL CORE

The coil and coil core mustbe removedfrom the magneto housing as a unit. Disconnectthe primary wire from the breaker arm springterminal by removing screw, 6017, take out thetwo coil core clamp screws, 54J-1, and removethe clamps, 5633. The coil and core can thenbe pulled from the housing. When replacingthis group make sure that the bare primary wireis corurected under the core clamp screw and thatthe insulated wire is connected to the breakerarm spring terminal"REMOVAL OF COIL FROM CORE

The coil X5700, is held tight on the core,X5524, by two wedges, 10383. It will be neces-sary to p re s s against the coil core with con-siderable force to remove it from the coil. Thecoil shouldbe supported in such a way that thereis no danger of the primary of the coil beingpushed out of th.e secondary.

When replacing the coil on the coil core,slide it on then press inthe two coil wedges,one on e ach end, until they are flushwi,ththeprimary of the coil.

Part No.

M*42XAM-55XAA-179X15-186A-243)(IXA-25616-5832L22IVA-583x2286228832L93230394542L05077525054tL54LL5411543Lx552455435603561056185622x56325633x5700857L7x5750x57575900x599662306465x6533669366946732x69166924x74447446

No,Reqrd.

121L11L11LL12Ll-122211111L1412L11121-

l_

411L11l_

L1

Part Name

Drive Flange Spacing WasherGround Stud LockwasherTrip ArmDrive SpringSnap RingGround Stud Washer (steel)Drive cup Spacing WasherDriven Flange StrlacerDrive Cup Spacing WasherDriven Flange GroupDrive Spring RetainerBreaker Arm Pivot Washer.Ground Stud NutGround Stud.Breaker Arm LockCam Wiper FeItName Plate ScrewCondenser Clamp Screw (Sems)Coil Core Clamp Screw (Sems)Impulse Dust Cover Screw (Sems) . . . ,,Breaker Spring Clamp Screw.Coil Core GroupName PlateBreaker Arm Pivot .. .Breaker Plate BushingCover Gasket (Inc. in X6533).Cover Screw (Sems)Stop Button GroupCoil Core ClampCoil GroupBreaker Point Aligning Washer.Ground Connection UnitGround Lead GroupFixed Contact Clamp Screw (Sems).Breaker Contact Set. .Impulse Lock NutImpulse Stop Clamp Screw (Sems)Cover Unit.Impulse Dust Cover GasketImpulse Dust Cover RingCoil Contact SpringCondenserCondenser ClampDust Cover UnitDrive Cup ... r..

Part No.

7447Y75699820L040711633x11637x11650x116561168911786xl1788LL874

No.Bes.!d,

I1l-1111l_

1l-l_

1

Part Neme

Tmpulse Dust Cover .. ..RotorGround Stud Insulating Lock.Breaker Point Aligring Washer (thin)fmpulse SpacerBearings Cage GroupImpulse Coupling Unit .Housing GroupRotor Bearing (Inc. in X11637).Impulse Stop Gasket (Inc. in X11?88)... .Impulse Stop GroupGround Stud lnsulator .

A GRA/ELYIT

ITTUSTRATED PARTS IISTTRACT(lR

8.GRA/ELY1 GRAVELY LANE DUNBAR WEST VIRGINIA 25054

A Division of Studebaker Corporation

,To coniinue its progrom of quolity ond de:ign improvement, themonufocturer reserves the right to chonge specificotions, de-signs or prices without notice ond without incurring obligotion.

TRACTORS WITH MANUFA,CTURING NUMBERS(See Nome Plote) A- I through 2M 5'1800

PL - IOODecember 67

Beginning withworm shaft andBearing. The

OLD PART NO.

L-207L-522-CL-522-R1-611-Br,- 2 03- E6728RB- I 10-RRB- 1 10-C7 I067 I077 I03L-204-E

MAJOR BEARING CHANGES IN TMCTOR CHASSIS

tractor Mfg. No. I-11553, the rear bearingaxle bearings will have a smaller diameter

following parts will be affected:

DESCRIPTION

on L-521Timken Ro11er

Chassis CastingRear Worm Shaft BearingRear Worm Shaft BearingAxleAxle Hous ingAxle Housing, T\vo SpeedAxle Bearing RaceAxle Bearing ConeShim .020"Shim .005"Bearing Cap GasketBearing Cap

Cone OnlyRace Only

NE$I PART NO.

10-388 PI10-389 Ar10-390 PI10-377 PI10-380 Pr10-381 Pr9245 Pr9246 AT10-382 Pr10-383 Pr10-384 PI10-379 Pr

84 12

q97"@ 4,-Q._@

*Erdfr]

34

DMe-$tv'\'ENGINE ASSEMBLY

30

fl''

,, 'lt so t/ ^T

NffimmutYdu,

ItemNo.

I234567-A7-B89

1011

PartNo.

L-88 l-XL-88 1-NL-882L-3T257 4l57 42L-403-AL-403-BL-879L-878101-S202-N

Des criPt ion

Valve Guide BronzeValve Guide, Cast IronValve SPring Locator SleeveValve SpringVa1ve Spring CaPValve SPring CaP KeYValve SPring Plunger Guide &Valve SPring Plunger Guide &Valve Cover GasketValve Cover CaPScrewNut

Page 2

Quan.Req 'd .

112222

Cover Ex.Side 1

Cover w/keywayl2244

lg&

20

P.

ItemNo.

7213141516T777 -A1819202I22232425lo2728293031323334353637383940414242-A43454647484950515354555758596061o263646566

Pa rtNo.

303-WL-407 -AL-880L-404r,- 40 5L-304L- 303803-A220-NL-40 6- rL-472r,-414L-426L-210L-707-2801-AL- 1095 14-KL-T77503-K210-NL- 107L- 104L-I72L-863r,-306-4'L-306-BL- 105L-110L-4T7L-41 6L-402L-810-AL-413L-415L- 115305-WL-41 9-AL-424L- 106L-720L- 116403-W206-NL- 42 0-B507-KL-855L-854L-853L-725L-850165-SL-126-AL-852

M{GINE ASSEMBLY Con't "

Des cription

Lock WasherValve Plunger GasketValve Tappet ScrewValve PlungerPlunger Guide StudCylinder and Crankcase StudCrankcase to Chassis StudSet ScrewNutCamshaft BushingCamshaft Oi1 SealExpansion PlugCam Shaft BushingGasket, Motor to ChassisCrankcase Complete (Matched Set)Set ScrewDrive Pinion ShaftWoodruff KeyDrive Pinion BearingWoodruff KeyNutSpreader Bolt WasherFlywhee 1

Flywheel NutConnecting Rod Complete with BushingConnecting Rod BushingConnecting Rod Bushing, LargeCrank PinTiming Pinion ShaftBearing StudIdler Gear BearingExhaust Cam ShaftCamshaft ExtensionCamshaft GearIdler GearTiming Pinion BearingLock WasherOi1 Pump Drive GearIntake Cam ShaftSpreader BoltCrankcase DowelCrankcase BoltFlat WasherNutOi1 Pump BushingLrToodruff KeyIdler Gear PinIdler GearMaster GearBearing Cap GasketBearing and Pump CapBoltOil Sea 1

Ga s ketPage 3

Quan.Req'd

82224411

J1

1J311

1

1JI31

1221

1

II11

11

1

21

1

21

11281

51

1

1I1

1

1311

ItemNo.

676869707273747576777879808182838485868788899L939495969798

100IO2103 NS104 NS

PartNo.

L-852-AL-85 I185-S57 452 18-NLH-543LH-545LH-544LH-546-CLH- 547LH-548L-3L757 33306-WL-407 -CL-301-D1 64-SG82 558227L-31l-Xr.- 31l-N17 091s4-Ss73557347 33r717 6L-301-BL-301-A183-S183-SL-87 4L-87 6

Qua n.Req'd.

as req.)131112II111I421211111

1011

1

11

12422

ENGINE ASSEMBLY CON't.

Des cr ipt ion

Shirn ( .005) GasketPump CoverBoltFan Drive Pu11eYFan Drive Pulley NutPiston with PinPiston Pin LockPiston PinOi1 Ring (3 pc.- 2 rings, 1 exPander)Compression RingChromed Compression RingCylinder Bottom GasketCy1 inderHeavy Lock WasherManifold Gasket, Exhaust & IntakeManifold, ExhaustManifold Bo1t, GraPhited, ExhaustNippleMufflerValve, ExhaustVa1ve, IntakeSpark Plug & WasherCylinder Head Bolt, ShortCylinder Head GasketCylinder HeadSpeed ClipManual Choke BracketGasket, Manifold to CarburetorManifold IntakeManifold Bolt, IntakeBoltGasket, Locator to CYlinderGasket, Valve Cover to Locator

Page 4

4?uio\tl\s/lo.d!b

str

4849(II

IIIlz'

,\s,\

@

1C>..'8

wr:-1

I

I)

?.1

Quan.Req 'd .

1

1

111

1

2

,@

qNwrrm,9,91!

:-':.{i3{trds ll

MODEL LT CHASSIS

Des cr ipt ion

Chassis CastingChassis Oil Filler NeckFi11er Neck BaffleChassis Oi1 Fil1er Cap BreatherRelief Valve BodyRelief Valve Check BallSpring.025"

Page 5

It- -

ItemNo.

1

22-AJ

44-A5

Pa rtNo.

L-20IL-217L-864L-2T2823rL-865L-815-D

30

,ffis4-\ Y/ti)#4qi \ ui3n \5- "'

- [E\-*. '\lj:'r

ItemNo.

66-A789

1011T213141516L71819202I222324252627282930313233343536373839404142434445464748495051525354555657

PartNo.

NJ-7-F8230154-SL-7 T5L-7 35L-7 72L-7 13L-7 36303-W165-S221rr-519L-506L-535L- 511L- 534r,- 513r,- 514L- 515L-7 IT-LL-7 1 1-R305-WLL-516-rL-517L-501L-524nE- 106L-522-RL-522-CL- 601L-521L- 608L-507L-523164-SL-547L- 505L-510L-542L- 541L- 540L-539305-WL-516-RL-536191-SL-7 10-RL-710-LL- 546L- 508L- 538L-520L-532

CHASSIS Con't.

Des cr ipt ion

Nut AdjustableReIief ValveAetuating Lever Clamp BoltActuating Shaft LeverOi1 Seal WasherClutch Actuating ShaftActuating Shaft BushingThrust I^IasherSecuring Bolt WasherBoltRear Thrust Plate Shim (.020)Rear Thrust PlateRear Pin PlateRear Pin Plate BushingSun GearSun Gear BushingOrbit GearOrbit Gear PinPin SpacerClutch Slide Rod, ShortClutch Slide Rod, ShortSpacer Lock tJasher Left HandSpacer Bolt Rear Pin Plate (t.tt. Thread)Clutch CupInternal GearRear SpacerRol1 PinWorm Shaft Bearing RaceWorm Shaft Bearing ConeWorm, Standard, (SpecLfy 4,6,or 8 lead)Worm ShaftWorm KeyBearing Adjusting NutAdjusting Nut LockLock ScrewPin Plate Spacer SpringFront Pin PlateSun PinionReverse IdIer BoltReverse Idler BushingReverse IdlerFront Pin SpacerSpacer Lock WasherSpacer Bolt Front Pin PlatePin Plate Quil1Quil1 Securing BoltClutch Slide Rod, I-ongClutch Slide Rod, LongPinion Shaft BearingGear CupReverse ConeFront Thrust PlateQui11 Bearing

Page 6

Qua n.Req 'd .

221

24282111

I1

1661

1

1

JJ221

I22111

1

111

11

3331331

31

1

1

111

1

ItemNo.

585960616263646565-A6667686970NS

ItemNo"

123456789

Pa rtNo.L-209L-732L-7 3318 09164-SL-7 34L-545L-202505 6L-207L- 543L-544L-226L-T32152-S

PartNo.

L- 614-BL- 61 6-rR3509L- 616-TUr-- 61 6-TrL- 61 6-OR17 9-SL- 613L-619

CHASSIS Con't.

Des cr ipt ion

Chassis Front GasketShipper Shaft l-everLocator BodyI-oca tor Ba 1 1

Shipper Shaft Guide BoltShipper Shaft GuideShipper ShaftAdvance CastingAttachment GasketAdvance Casting BoltPinion ShaftClutch DogDog PlateSpringAttachment Bolt

Quan.Req'd1

1II211

1461111

4

Quan.Req'd

226222622

WHEEL ASSEMBLY

Description

Wheel HubInner RimRim Bolt NutsTractor Tire TubeTractor Tire, sureOuter Rim, (with vaRim BoltsHub Cap WasherHub Cap

Page 7

grip or studded1ve hole)

,0@2A t/

MODEL LT CHASSIS ( Illustrat ion B)

B

20

t0l6r

t/rl22

Page 8

MODEL LT CHASSISILLUSTMTION B

TtemNo.

I22-AJ4567R

91011I2131415161 6-AI71819202I2223242526272829303132JJ3435

Pa rtNo.

L-606L-8 68L-823-A2 18-N204-N304-WL-205L- 604L-602L- 607-KL- 603L- 605501-KL-206RB- 1 1 l-CRB- 1 I l-RL-220L-220-Gr-203-EL-2T5123-Sw-s- 18I22-SRB- 1 10-RRB- 1 10-Cr- 611L- 6157 103L-204-EL-2085 CH-6-C227 -NL- 883r,-884L-8857 1067 t07

Des cript ion

Thrust Block0i1 Strainer BodyGa sketOi1 Strainer NutNutBearing Cap Lock WasherDifferential HousingBevel GearWorm Gear, (Specify 4,6,or 8 Lead)Driving B1ock, (with KeYvaY)Bevel PinionPinion PinPinion Pin KeyDifferential Housing BoltDifferential Bearing ConeDifferential Bearing RaceShim ( .005 .020)Ga s ketAxle HousingOil Drain Washer TabAxle Housing Drain Bolt (ny1on plug)Lock WasherAxle Housing BoltAxle Bearing RaceAxle Bearing (cone)AxleAxle KeyBearing Cap GasketBearing CapBearing Cap Oi1 Seal (double)Bearing Cap BoltAxle NutDip StickDip Stick GuideDip Stick Fitting.020 Shim.005 Shim

Qua n.Req 'd

1111

44221

221

1422

as req2211

1111

1

1

22222821

1

1

as reqas req

'd

'dtlu

Page 9

l9 20

46-@45--.@44---€43 ---@42---@'..-41_@

57 '.

tul@24 I"'

25

SWIFTAMATIC2-SPEED DI FFERENTIAL ASSM'{BLY

ItemNo.

PartNo.

205-N67 50403-WNTE-O5C402-W67 2467 2367 2519 1-S

Description

Hex NutClutch SpringClutch Spring Washer, heavyElastic Stop NutFlat WasherPivot BushingShifter ArmStationary Pivot PinHex Head Cap Screw

Page 10

Qua n.Req'd .

12356789

10

4242121

1

2

55'J^../,'z. '\-56w

2-SPEED DIFFB.ENTIAL ASS$4BLY Con' tDescriptionItem

No"

11t213141516T718192027222324252627282930313233343536373839404L42434445464748,lr O

5051525354555657

Pa rtNo.

67 3I185-S67 2667 1367 3267 2t67 34309-W67 2867 1967 2067 78RB- 123-R5CH- 6C304-W67 1767 3967 4067 4467 4367 58602-cL-7 22401-W67 57201-N67 5567 5967 5651 6767 1567 3867 3767 4267 4167 0267 0867 0467 0967 I067 5267 7r67 0s67 0367 1467 76RB- 123-CNN

Shifter GuardHex Head Cap ScrewShifter Pin"0" Ring Retainer"O" Ring SealClutch Sliding PinStationary Clutch BoltShake Proof Lock WasherAxle Housing 2-Speedshifring YokeStationary ClutchShifting ClutchBearing RaceHex Head Cap ScrewShake Proof Lock WasherClutch Hous ingClutch Housing & Worm Gear ShimClutch Housing & Worm Gear ShimThrust RaceNeedle Thrust BearingShifter RodCotter PinClevis PinFla t \.rla sherOver Center l,ock Spring GuideHex NutToggle SpringShifting Handle Mounting BracketShifter LeverHandle Lever GripSpider Thrust WasherSpider Thrust Shim "02OSpider Thrust Shim .005Thrust RaceNeedle Thrust BearingShifting Train PinionSpider Gearshifting GearDifferential GearSpider PinDifferential Thrust SPacerThrust Pin8 Start Worm GearPinned GearDowe11 PinPinned HousingBearing ConeShifter Rod Assembly, ComPlete

Qua n.Req 'd .

I1

12I1111

1

1

1

1

T272

1

.005 as req'd.

.020 as req rd.1

I1J

I2121

1

112

opt.222241

21211

I31

11

Page 11

I

J

oIL ]-rNES, GASOLTNE & MAGNETO ASSm'{BLTES

89q.b,-- 46'i'Y

--\ez\ls

12dl3--e

@,,ts-@

,rjl7-e,,,W

27-o

/34j28J/ 35

;;1 36-q

: "J:: ffi4\5dry)qr -8

437

'P.A

5

&

Pa rtNo.

82308259L-857L-858L-B 14-CL- 8 13-AL- 8 14-AL-8 60L-814-DLL- 8 14-FL-859EL,/N/4C40 1-WL-832-DL-832-HL-8 19-E20l-NL-833L-837L-836L-841822812 6-SL-814-EL-7 05

Y*-33

tTq

43

ItemNo.

1

2J456789

10111213141516I71819202L22232425

Des cr ipt ion

Relief Valve ConnectorOil Line, Filter to Relief ValveOi1 FilterOil Filter BracketDischarge Line TeeIntake oil Line 5/76"Pump Inlet ConnectorOil Line Filter to EngineEngine Elbow Long StyleElbow, Oil StrainerOil Line Pump to FilterWing NutWa sherDouble Air GuardGa sketAir Filter BoltHex NutAir Cleaner BracketGa s ketHose ClampAir Filter HoseCarburetorCarburetor BoltGas Filter NipPleGas Strainer ComPlete

Page 12

Qua n.Req'd

I1

11

1

111

1

1

1

1

1

1

1

1I1

1

21

1

21

1

ItemNo.2627282930313233343536373839404t424344454647NS

ItemNo.

I

OIL LINES, GASOLINE

Pa rtNo,L-8427 216L-844L-843L-7 012 505*A8257233-N149-S5 I 64-8I 14:ST7 3TL-827L-826L-808179-SL-809-FL- 811154-SI,- B 14-DL-866L-867402-t^T

& MAGNETO ASSEDGLIES Con't.De s cr ipt ion

Gas Line ConnectorFuel Hose ClampGas Line HoseElbow Carburetor to Gas LineGas TankGas Tank CapTank Band Right & LeftElastic Stop NutTank Band Bo1t, LongAnchor BracketTank Band to Fan Housing BoltSpark Plug WireRubber GrommetCable BracketMagnetoMagneto to Chassis BoltFloat MemberMagneto CouplingMagneto Coupling BoltElbow f"Oi1 Pressure GaugeOil Pressure Gauge Adapter5/16" Flat Washer (used on Items 34&

Quan.Req 'd12111124222111

I211111

136) +

Quan.Req'd

1

ll\\..

-/a-'-\.- _<0\ --'--\ ra \\c,W*** -.-u.B:,

E14

Pa rtNo.

sT- 13 6

SUPM. HOOD ASSM,{BT-Y

74'rbi 5Qf--H-a6

Des cr ipt ion

Super HoodPage t3

ItemNo.23456789

1011t21314

ItemNo.

12J45

PartNo.

L-820-B112-SL-82 I306-W206-N

Pa rtNo.8280436-7 322RP4sT-129sT- 131207-NN- 10-ST- 5-C826I441-2568254825782528253

SUPER HOOD ASSA"IBLY Con't.Descr iption

Hood BumperMachine ScrewRol1 PinSupport RodHood CatchHex NutMachine ScrewBattery BracketAcorn NutSpr ingPivot TubePivot RodAcorn Nut

}IANDLES, CUSTOM

Quan.Req'd.24II1

41

I42I1

2

ITOOD AND CONTROL GROUPS

22

%@(

14

A{@

Description

Hood - CustomBoltHood SpaeerLock WasherNut

Page 14

""4>,

,e$K

Quan.Req 'd .

I2228

MNDLES, CUSTOM HOOD AND CONTROL GROUPS CON't

ItemNo.

6789

1011I2131415T6I71819202L2223242526272829303132JJ343536373839404L4243444546

Pa rtNo.

2 10-NL-7 29L-7 30154-SL-7 75L-7 23L-720-L828 I602-cL-7 22L-7185167L-7 T6L-7 17402-W233-NL-725-R195-SL-720-SL-7 42L-7 24-RL-7 28403-W306-w205-N10-27 58265ro-27 7822682678266L-724-LL-7 268263c- 107826482258260L-725-L827 6441-256

Quan.Req 'd .

4422221

2221

22221

1

21

1I2222I1I122I21

11

12144

Des cr ipt ion

Nut (Repairs Only)SpringClutch Rod (Threaded-repa irs)BoltClutch Actuating LeverClutch Rod PivotClutch Rod - LongHood BumperCotter PinClevis PinBoltHand l-ever GripClutch Hand l-everHand Lever PivotFlat frasherNutHandle Grip-Right Side (+"ho1e)Bo1t, Right (131-S Left)Clutch Rod - ShortClutch Rod BraceDriving Handle - RightDriving Handle BracketFlat WasherLock WasherNutWireGrommetStop SwitchThrottle Control Lever AssY,Conelock NutPan Head Machine ScrewDriving Handle LeftHandle ClampBo ltControl BracketConelock NutChoke Control Cable AssemblYChoke and Conduit ClampHandle Grip Left SideMachine ScrewAcorn Nuts (Used W/B2eI)

Page 15

ItemNo

1011I213141516T71819202l22

FAN AND DEFLECTOR ASSEMBLY

Des cr ipt ion

Fan Securing NutFan Nut ]-ock WasherFanFan ShaftFan Ball BearingFan Bearing Lock NutFan Bearing Lock WasherFan Housing BracketAir Deflector, Right HandAir Deflector, Left HandSheet Meta I ScrewCylinder Head Air DeflectorLong Cylinder Head ScrewDeflector SPacerFan Hous ingFan Bearing Race RetainerFan Bearing SPacerFan Pu11eyFan Pu11ey Jam Nut WasherFan Pu11ey Jam NutFan BeltHex NutLock Washer

Page 16

Quan.Req'd

11

1

1

221

2I1412211

1

1

111

22

1234567

89

Nndwl

PartNo.

206-N306-WL-8055r375 1395 134L-830L-224L-838-A-RHL-838-B-LH156-SL-839155-Sr,-840L-222513 35165L-80240 1-W204_N516321l-N308-W

Litho USA