HOMELITE CHAIN SAW

HOMELITEModel Bore Stroke Displacement Drive

mm (in.) mm (in.) cc (cu. in.) TypeXL.12 44.4 34.9 54.1 Direct

(1.75) (1.375) (3.3)Super XL, Super XL-AO,SXL-AO, Old Blue,Big Red 46.0 34.9 58.2 Direct

(1.8125) (1.375) (3.55)

MAINTENANCE

SPARK PLUG. Model XL-12 isequipped with a ChMmpion CJ8 sparkplug while Model Super XL Automaticuses a CJ6. For heavy duty service, aChampion UTJllP gold-paladium tipspark plug can be used.

For all models, set spark plug elec-trode gap to 0.025 inch (0.63 mm).

CARBURETOR. A Tillotson HS,Walbro SDC or Zama diaphragm car-buretor is used. Refer to CARBURE-TOR SERVICE section for service pro-cedures and exploded views.

Initial adjustment of idle mixturescrew is 1^4 turns open and for highspeed mixture screw is l'A turns open.Adjust idle mixture screw and idle speedscrew so engine idles just below clutchengagement speed. Make high speedmixture adjustment with engine warmand under cutting load. It may benecessary to readjust one mixture screwafter adjusting the other mixture screwas the functions of the idle and highspeed mixture screws are related.

MAGNETO AND TIMING. A Wicoor Phelon flywheel type magneto withexternal armature is used on earlymodels while late models are equippedwith solid state ignition. The solid stateignition system is serviced by renewingthe spark plug and/or ignition module.Air gap between ignition module andflywheel is adjustable. Adjust air gap byloosening module retaining screws andplace a 0.015 inch (0.88 mm) shim stockbetween flywheel and module. Removeshim stock.

Note the following on breaker-pointequipped models: Units equipped withPhelon magneto will have a letter "P"stamped after the serial number. TheWico and Phelon magnetos are similarlyconstructed, so care should be taken toproperly identify magneto before order-ing service parts. Breaker-points andcondenser are located behind flywheel.

Armature core and stator plate areriveted together and are serviced only asa unit. Stator plate fits firmly onshoulder of crankcase; hence, armatureair gap is nonadj us table.

Late production Wico magnetostator plates are built to retain a felt seal(5-Fig. HL33); the seal cannot be usedwith early production Wico statorplates. All Phelon stator plates are builtto retain the felt seal (5).

Magneto sUator plate has slottedmounting holes, and should be rotatedas far clockwise as possible beforetightening mounting screws to obtaincorrect ignition timing of 30 degreesBTDC. Set breaker point gap to 0.015inch (0.38 mm). Condenser capacityshould test 0.16-0.20 mfd.

Fig. HL30-Exploded view of air box (throttie handle) and related parts on modeis with fiat reed in-take vaive (34). Refer to Fig. HL31 for modeis equipped with pyramid reed ¥aive.

1. (]asket2. Insulator3, Fuel line4, Carburetor5. Cotter pin6, Choke rod8. Filter cover9, Nut

10, Snap ring11, Filter element12. Gasket13. Gasket14. Bracket15. Throttle rod16, Boot

19, Throttle latch pin20. Spring23. Snap ring24, Throttle trigger26. Grommet27. Choke button28, Check valve

29. Air box30. Grommet31, Spring32. Pump plunger33. "0" ring34, Reed vaive35. Reed back-up36. Reed stop

172

SERVICE MANUAL HOMELITE

CAUTION: Be careful when installingbreaker-points not to bend tension springany more than necessary; if spring is bentexcessively, spring tension may be re-duced causing improper breaker-pointoperation. Late Wico units have a retain-ing clip and fiat washer to secure breakerarm on pivot post.

LUBRICATION. The engine islubricated mixing oil with unleadedgasoline. Recommended oil is Homelite®two-stroke oil mixed at ratio asdesignated on oil container. If Homelite®oil is not available, a good quality oildesigned for two-stroke engines may beused when mixed at a 16:1 ratio,

CRANKCASE

Fig. HL31 - Expioded view of air box and throttie handle assembly for modeis equipped with pyramidreed type intake vaive. idie speed adjusUng screw (23) on some modeis, is located in air box insteadof on carburetor body; remove idle speed adjusting screw and spring from new service carburetorbefore instailing carburetor on these modeis. Early type aluminum reed seat is shown; refer to Fig.

HL32 for iate type piastic (Deirin) seat and mouided reed retainer.1.2.3.4.5.7.8.9.

10.

GasketsSpacerReed seatValve reeds (4)Retaining platesFuel lineGasketCarburetorAir \x>x

11.14.17.18.19.20.21.23.

(JasketCoverFilterGasketBracketChcke r(KlThrottle rodIdle speerl screw

24.27.28.29.31.32^33.35.

Bw)tThrottle latch pinSpringHandle coverSnap ringThrottle triggerGrommet"In" check valve

36.37.38.39.40.

41.43.43.

"Out" check valveGrommetPlug (AO mcKlels)(JasketSfiring (manualoiler)"0" ringManual pump plunger"O"ring

however, an antioxidant fuel stabilizer(such as Sta-Bil) should be added to fuelmix. Antioxidant fuel stabilizer is not re-quired with Homelite® oils as they con-tain fuel stabilizer so the fuel mix willstay fresh up to one year.

Fill chain oiler reservoir withHomelite® Bar and Chain oil or a lightweight oil (no heavier than SAE 30). Incold weather, chain oil can be dilutedwith kerosene to allow easier flow of oilthrough pump and lines.

CARBON. Muffler and cylinder ex-haust ports should be cleaned periodical-ly to prevent loss of power due to carbonbuild up. Remove muffler and scrapefree of carbon. With muffler removed,turn engine so that piston is at top deadcenter and carefully remove carbonfrom exhaust ports with a woodenscraper. Be careful not to damagechamfered edges of exhaust ports or toscratch piston. Do not run engine withmuffler removed.

REPAIRS

TIGHTENING TORQUE VALUES.Tightening torque values are as follows:

4/40 Reed & stop tochamber 5-6 in.-lbs.

(0.6-0.7 N-m)4/20 Oil line plate or

shield to tank 5-6 in.-lbs.(0.6-0.7 N*m)

8/32 Throttle handlecover 40-48 in.-lbs.

(4.5-5.4 N-m)8/36 Connecting rod 55-66 in.-lbs.

(6.2-7.5 N-m)10/32 Muffler cap 50-60 in.-lbs.

(5.6-6.8 N-m)10/32 Bearing retainer 55-66 in.-lbs.

(6.2-7.5 N-m)10/32 Screen to rotor . 50-60 in.-lbs,

(5.6-6.8 N-m)10/32 Drivecase cover 55-66 in.-lbs.

(6.2-7.5 N-m)

10

Fig. HL32-Vi0w 9howing iate type Deirinpiastic reed seat f5> and mouided reed retainer(3), Reeds (6) are heid on pins protruding fromseat by the retainer. Refer to text for assembly

instructions.1. Gasket2. Spacer 6. Reeds (4)3. Reed retainer 9. Gasket5. Reed seat 10. Carburetor

Fig, HL33-Expioded viewof Wico magneto used onsome modeis. Pheionmagneto used on othermodels is simiiar. Felt seal(S) is not used on early

modeis.1. Flywheel2. Cover3. Gasket4. Breaker points5. Felt seal6. Gasket7. Condenser8. Ignition coil9. Coil clip

10. Armature coreU. Stator plate

173

HOMELITE CHAIN SAW

10/32 Pulley to fanhousing 50-60 in.-lbs.

(5.6-6.8 N-m)10/82 FlangiMl inner

race for pulley 55-66 in.-lbs.(6.2-7.5 N-m)

10/32 Carburetor tochamber 50-60 in.-lbs.

(5.6-6.8 N-m)12/24 Handle bar to

fuel tank 80-96 in.-lbs.(9.0-10.8 N-m)

12/24 Bracket to(irivecase .80-96 in.-lbs.

(9.0-10.8 N-m)12/24 Stator to crankcase

and cylinder 80-96 in.-lbs.(9.0-10.8 N-m)

12/24 Drivecase tocrankcase 80-96 in.-lbs.

(9.0-10.8 N*m)

12/24 Carburetorchamber to fuel tank . . . .80-96 in.-lbs.

(9.0-10.8 N-m)12/24 Muffler to cylinder . .80-96 in.-lbs.

(9.0-10.8 N-m)1/4-20 P̂ uel tank to

crankcase 80-96 in.-lbs.(9.0-10.8 N-m)

12/24 Fan housing tofuel tank 80-96 in.-lbs.

(9.0-10.8 N-m)1/4-28 Cylinder nuts 100-120 in.-lbs.

(11.3-13.6N-m)12/24 Pawl studs to

rotor 80-96 in.-lbs.(9.0-10.8 N-m)

1/4-20 Handle bar tobracket 100-120 in.-lbs.

(11.3-13.6 N-m)1/4-20 Bumper screws 80-96 in.-lbs.

(9.0-10.8N-m)

3/8-24 Clutch nut 150-180 in.-lbs.(16.9-20.3 N-m)

5/8-32 Clutch 150-180 in.-lbs.(16.9-20.3 N-m)

5/16-24 Rotor nut 150-180 in.-lbs.(16.9-20.3 N-m)

1/2-20 Clutch tocrankshaft 150-180 in.-lbs.

(16.9-20.3 N-m)14 mm Spark plug 250-300 in.-lbs.

(28.2-33.9 N-m)Clutch spider 180-216 in.-lbs.

(20.3-24.4 N-m)

HOMELITE: SERVICE TOOLS.Listed l)elow are Homelite tool numbers,tool description atid model applicatioti oftools for servicing.

Tool No. Description & Model Usage04197-Carl)uretor tester17789-Carl)uretor repair tool kit.22820-1-Bearing collar for A-23137.23136-Body for A-23137.23756-Plug, connecting rod bearing re-

moval and i!istallation, all models.23757-Plug, needle roller type main

bearing installation, all models.23758-Plug, crankcase seal installa-

tion, all models; {Irivecase seal instal-lation. Model XL-12.

23759-Sleeve, crankcase seal protec-tor, ali models; drivecase seal pro-tector. Model XL-12.

TO OIL aiMP

7 t

00

93A

Fig. HL34 - Expioded view showing power head and fuei tanii construction of Modei XL12; refer to Fig. HL35 for Modei Super XL Automatic. Dowei pin(68) are used on iater modeis. Refer to text. Single or two piece muffier may be used. Shieid (91) is not used on iater modeis.

4H,5051,54,

5H57

Fuel tiink cap(laskctFuel tankOil lint>Check valveOil lineOil niter

58.59(>0.«2,

H4,H5

Fuel [)it'ku|iFuel filterTank cover (late)Flexillie fuel line(lasket( 'rankcaseNeedle l)earint:r

6H.H8.H9.70.71,72,

Crankshaft seal[)owel pinsThrust washersThrust hearingsCrankshaftConnecting r«Ml &cap

80, Muffler cap81, Special stuils82, Balfle83, Muffler iKxiy

83A. Muffler88. CylinderHi). Oil cap

73.74.75,76.77.

77A,

Needle liearin^RIKI cap screwsNeeiile rollersPist(tn & pinSnap rin^rSnap ririK

78.90,9 l '

91 A.92.

94.

Piston rin^sOasketShieMPlate('otter pin(breather)Oil line

174

SERVICE MANUAL HOMELITE

23800-Sleeve, crankcase seal instal-lation, all mocieis; drivecase seal in-stallation. Model XL-12.

23819-Plug, clutch drum needle bear-ing installation, all direct drivemodels.

23843-Sleeve, drive seal installa-tion, Model Super XL Automatic.

23844 - Sleeve, drive seal protector,Model Super XL Automatic.

23845-Plug, drivecase seal instal-lation. Model Super XL Automatic.

23846-Anvil, crankshaft installation.Model Suf)er XL Automatic.

23884-Sleeve, bearing and shaft. ModelSuper XL Automatic.

94194-Compression gage.A-23137-Jackscrew, crankshaft assem-

bly and installation, all models ex-cept XL-12.

A-23841-A-Wrench, guide bar stud in-sert. Model Super XL Automatic.

A-23934-Wrench, clutch plate removaland installation, all late production.

A-23949-Remover, piston pin withSpirol pin at exhaust side of piston.

A-23960-Remover and locking bracket,rotor (flywheel), all models.

JA-31316-4-Test spark plug.

COMPRESSION PRESSURE. Foroptimum performance on all models,cylinder compression pressure should be130-155 psi (896-1069 kPa) with engineat normal of)erating temperature.Engine should be inspected and repairedwhen compression pressure is 90 psi(620 kPa) or below.

CONNECTING ROD. Connectingrod and piston asseml)ly can be removedafter removing cylinder from crankcase.Refer to Fig. HL39. Be careful to re-move all of the l(K)se needle rollers whendetaching rod from crankpin. Earlymodels have 28 loose neecile rollers;starting with serial number 207-1277, 31needle rollers are used.

NOTE: A different crankshaft and con-necting rod are used on late models with31 needle rollers.

Renew connecting rod if bent ortwisted, or if crankpin bearing surface isscored, burned or excessively worn. Thecaged needle roller piston pin bearingcan be renewed by pressing old l)earingout and pressing new bearing in withHomelite tool 23756. Press on letteredend of bearing cage only.

It is recommended that the crankpinneedle rollers be renewed as a setwhenever engine is disassembled forservice. On early models with 28 needlerollers, stick 14 needle rollers in the rodand remaining 14 needle rollers in rodcap with light grease or beeswax. Onlate models with 31 needle rollers, stick16 rollers in rod and 15 rollers in rodcap. Assemble rod to cap with matchmarks aligned, and with open end ofpiston pin towards flywheel side ofengine. Wiggle the rod as cap retainingscrews are being tightened to align thefractured mating surfaces of rod andcap.

63 66 85

Fig. HL35 — Exploded view showing latest type fuel tank and later construction of power head; referto Fig. HL34 for early units. Ball bearing (72} is retained on crankshaft by snap ring (7Z} and indrivecase by two screws (70) and special washers (71); refer to Fig. HL36. Latest models have 31loose needle rollers (75) at crankpin; earlier models have 28 rollers. Tank cover (SB) is sealed to tank(S3) with cement (Homelite part 22788) and is retained with i6 screws (S9). Later tanks are permanent-

iy bonded.42. Woodruff key 79A. Snap ring49. Fuel tank cap 59. Screws (16) 72. Ball bearing 81. Piston rings50. Gasket 63. Gasket 73. Snap ring 83. Muffler cap53. Fuel Unk 64. Crankcase 74. Connecting rod 84. Special studs54. Pipe plug 65. Needle bearing 75. Needle rollers 85. Baffle55. Fuel filter 66. Crankshaft seat 76. Needle bearing 86. Muffler btxJy56. Pick-up head 69. Crankshaft 77. Rod cap screws 91. Cylinder57. Grommet 70. Bearing screws 78. Piston & pin 92. Plate58. Fuel tank cover 71. Special washers 79. Snap ring 93. Spark arrester

PISTON, PIN AND RINGS. Thepiston is fitted with two pinned compres-sion rings. Renew piston if scored,cracked or excessively worn, or if ringside clearance in top ring groove ex-ceeds 0.0035 inch (0.089 mm).

Recommended piston ring end gap is0.070-0.080 inch (1.78-2.03 mm); max-imum allowable ring end gap is 0.085inch (2.16 mm). Desired ring sideclearance in groove is 0.002-0.003 inch(0.05-0.08 mm).

Piston, pin and rings are available instandard size only. Piston and pin areavailable in a matched set, and are notavailable separately.

Piston pin has one open and one closedend and may be retained in piston withsnap rings or a Spirol pin. A wire retain-ing ring is used on exhaust side of pistonon some models and should be removed.

To remove piston pin on all models,remove the snap ring at intake side ofpiston. On piston with Spirol pin at ex-haust side, drive pin from piston rodwith slotted driver (Homelite toolA-23949). On all other models, insert a3/16 inch (4.76 mm) pin through snap

Fig. HL36—View showing crankcase removedfrom drivecase and crankshaft on models equip-ped with bail bearing at drive end of crankshaft.To remove crankshaft from drivecase, bearing

retaining screws (70) must first be removed.

Fig. HL38- Be sure the steel thrust washers (26)are to outside of thrust bearings (27) when in-stalling crankshaft on Model XL't2. Model SuperXL Automatic does not use thrust washers or

thrust bearings.

175

HOMELITE CHAIN SAW

at exhaust side and drive piston pinout as shown in Fig. HL40.

When reassembling piston to connect-ing rod, be sure to install closed end ofpiston pin towards exhaust side ofpiston (away from piston ring locatingpin). Fit the Waldes Truarc snap ring ingroove of pin bore with sharp edge outand turn ring gap towards closed end ofpiston.

CRANKSHAFT AND BEARINGS.On Model XL-12 the crankshaft is sup-ported in two cageci needle roller bear-ings and crankshaft end f)lay is con-trolled by a roller bearing and hardenedsteel thrust washer on each end of theshaft. Refer to Fig. HL38. On ModelSuper XL Automatic, ilywheel end ofcrankshaft is supported in a needle bear-ing in crankcase and drive end is sup-ported in a l)all bearing located in drive-case; end play is controlled by the ballbearing.

Maximum allowable crankshaft endplay on models with thrust bearings(Fig. HL38) is 0.020 inch (0.51 mm);renew thrust bearings if end play is ex-cessive. Normal end play is approx-imately 0.010 inch (0.25 mm).

Renew the crankshaft if any of themain l)earing, crankpin bearing orthrust bearing surfaces or sealing sur-faces are scored, burned or excessivelyworn. Renew the drivecase ball bearing

if excessively loose or rough. Also, rejectcrankshaft if flywheel keyway is beatout or if threads are badly damaged.

CYLINDER. The cylinder bore ischrome plated. Renew the cylinder ifchrome plating is worn away exposingthe softer base metal.

CRANKCASE, DRIVECASE ANDSEALS. On all models, crankshaft sealscan be renewed without disassemblingcrankcase, drivecase and crankshaftunit. With magneto armature and coreassembly removed, pry seal from crank-case. Install new seal over crankshaftwith lip of seal inward, then using driversleeve, drive seal into crankcase. Seal indrivecase can be pried out after remov-ing clutch assembly and, on models soequipped, the automatic chain oilerpump. Install seal with lip inward anddrive into position with sleeve.

NOTE: Use of seal protectors is recom-mended; if protectors are not available,wrap threads on crankshaft with thinplastic tape to prevent damage to seallips.

Crankcase can be removed fromcrankshaft and drivecase after remov-ing cylinder, piston and connecting rodand removing retaining screws. OnModel XL-12, crankshaft can bewithdrawn from drivecase. On ModelSuper XL Automatic, remove the twobearing retaining screws (70-Fig.HL35) special washers (71), then presscrankshaft and ball bearing (72) fromdrivecase. Remove snap ring (73), thenpress crankshaft out of the ball bearing.

Inspect the needle roller bearing incrankcase, and on Model XL-12, the nee-dle roller bearing in drivecase. Bearingsshould be renewed if any needle rollerhas flat spots or is otherwise damaged,or if rollers are worn so any two rollerscan be separated a width equal tothickness of one roller. Always pressagainst lettered end of bearing cagewhen removing and installing needleroller bearings. Needle roller bearings

should be installed using appropriate in-stallation plug.

Install new ball bearing on crankshaftusing jackscrew or by supportingcrankshaft at crank throw and instailingbearing in a press. Groove in outer raceof bearing must be toward crankpin.

Renew crankshaft seals before assem-bling crankshaft, crankcase and drive-case. Using installation plug, press sealinto position with lip to inside ofcrankcase. On Model XL-12, installthrust bearings on crankshaft next tocrankpin throw, then install the hard-ened steel rust washers at outer side ofeach thrust bearing. On Model Super XLAutomatic, first assemble crankshaftand drivecase by placing seal protectoron crankshaft, then pulling crankshaftand ball bearing into drivecase withjackscrew and adapters. Install twoNEW bearing retaining screws andlockwashers. On Model XL-12, placeseal protector on crankshaft and insertcrankshaft in crankcase. Then, on allmodels, assemble crankcase to drivecaseusing new gasket.

NOTE: On early production, crankcasewas sealed to drivecase with an "O" ring;however, use of "O" ring has been discon-tinued and a gasket, rather than an "O"ring, should be used on all models.

On all late production models, crank-case is fitted with dowel pins to providea more positive alignment of crankcaseand drivecase. Service crankcases aredrilled for dowel pins, but dowel pins arenot installed so crankcase can be usedwith early type drivecase not drilled fordowels. If renewing late type crankcasefitted with dowel pins, two new dowelpins must be obtained and installed innew crankcase; install dowel pins sothey protrude 0.165-0.180 inch(4.19-4.57 mm) from crankcase.

PYRAMID REED VALVE. Allmodels are equipped with a pyramidreed type intake valve with four reeds.Early production reed seat was made of

Fig. HL39 — Piston and connecting rod assemblycan be removed from crankpin after removingcylinder from cranitcase. Note piston ring

locating pin on intake side of piston.

Fig. HL40 —After removing snap rings the pistonpin can be tapped out using a 3/16 inch (4.76 mm)rod as shown or, on pistons with Spirol pin at ex-haust side, by driving piston pin out with slotted

driver (Homeiite tool A23949).

Fig. HL41 ~ When installing reed valve on air box(models with flat reed intake valve only), be surereed is centered between the two points in-

dicated by arrows.

176

SERVICE MANUAL HOMELITE

1, Handlebar4, Bumper spike7. Bradtet8. Clutch cover (late)

8A. Clutch cover (eariy)9. Clutch sh(x*(late)'

9A, Clutch shoe (eurly)10, Clutch plate (lute)

lOA, Clutch spider(early)

11. Clutch spring (late)1 lA. Clutch spririif

(early)

lli. Inner guide twirplate

12A, Guide har sprinjf13, Outer guide bar

plate15, Drivecase c(»ver16, Crankshaft nut17, Flat washer18, Thrust washer19, Clutch drum &

sprocket20, Nee<lle Itearing21, Bearing inner race22, Thrust washer

Fig, HL42- Exploded view of typical direct drive dutch assembiy. Late type dutch assembiy (itemsB, 9, lOSili) is Interchangeabie as a unit with early production dutch shown in inset at iower ieft cor-

ner.

^ : ^

20

14 15Fig, HL43—Exploded view of automatic chain oU pump on models so equipped.

1. Oil reservoir cover 14. Felt seal2. Gasket 6. "0" rings 10. Bar adjusting pin 15. Worm gear3. Gasket 7. Oil line II, Cam screw 16. Flange4. Oil line 8. Oil filter 12. "O" rings 17. Plunger5. Oil line tube 9. Drivecase 13. Pump ^ y 18. Crankshaft seal

aluminum and reeds were retained toseat by spring plates and screws.

Late production reed seat (see Fig.HL32) is made of Delrin plastic. Thereeds fit onto pins protruding from theplastic seat and are held in place by amolded retainer, eliminating the retain-ing spring plates and screws.

Reeds, spring plates and retainingscrews are available for servicing theearly type aluminum reed seat.However, if the seat is worn or damagedbeyond further use, the Delrin seat andmolded retainer is used as replacement.

When assembling reeds to aluminumseat, apply Loctite to retaining screwsto keep them from working loose.Renew the spacer gaskets and car-buretor gasket and install the spacer,reed seal assembly and carburetor as inFig. HL31.

To assemble and install Delrin reedseat and reeds, proceed as follows: Fitreed retainer (3 - Fig. HL32) into spacer(2) so the pin on retainer clears cut-outin spacer. Using a drop of oil under eachreed, stick the reeds to pyramid seat soholes in reeds fit over the pins molded in-to seat. Place the retainer and spacerover the reeds and seat so all parts arelocked together, then install the valveassembly and carburetor with newgaskets (1 and 8).

CLUTCH. Refer to Fig. HL42 for ex-ploded view of typical clutch assembly.Illustration shows late type clutchassembly using three compressionsprings (11) to hold shoes retracted inplate (10) and in insets at lower left cor-ner, the early type clutch using gartertype springs (HA) to hold shoes tospider (lOA). The early type clutch (in-set) and late type clutch are interchange-able as an assembly. Clutch plate (10) orspider (10A) is threaded to crankshaft.

If clutch will not disengage (chain con-tinues to turn) with engine at idle speed,check for broken, weak or improperly in-stalled clutch springs. If clutch slipsunder load and engine continues to runat high speed, excessive wear of clutchshoes is indicated.

On early production Model XL-12,clutch drum was equipped with an Oilitebushing. All later clutch drums, in-cluding service clutch drum for earlyXL-12, are fitted with caged needleroller bearings. When renewing earlybushing type clutch drum, a new needlebearing inner race must also be in-stalled.

Renew needle roller bearing innerrace if wear marks are visible. Renewbearing in clutch drum if any roller hasflat spots or is damaged, or if worn toextent that any two rollers can beseparated the width equal to thethickness of one roller. Using installer

177

HOMELITE CHAIN SAW

plug, press against lettered side of nee-dle bearing cage when installing bear-ing.

Refer to Fig. HL47 for assennbly oflate type clutch.

AUTOMATIC CHAIN OILERPUMP. Refer to Fig. HL43 for explodedview of typical automatic oiler pump in-stallation, and to Fig. HL44 forschematic view showing pump opera-tion.

The automatic oiler pump pump is ac-cessible after removing the clutchassembly from crankshaft and discon-necting oil lines. Pump plunger(17-Fig. HL43) and body (13) areavailable as a complete assembly onlywhich includes flange (16), cam screw(11), gasket, "0" rings (12), sealing felt(14) and flange retaining screws;however, all parts except plunger andbody are available separately.

Inspect tip of cam screw (11) and camgroove on plunger (17) for wear andplunger bore in body and piston portionof plunger for scoring or wear. Renewpump assembly if body and/or piston isworn or damaged beyond further use.

REWIND STARTER. Refer to Fig.HL49 or HL50 for an exploded view ofearly or late rewind starter. There weresome models equipped with the earlystarter that used some of the com-ponents shown on the later starter. Ser-vice procedures for all of these startersare the same.

To disassemble starter, pull starterrope fully out, hold starter pulley fromturning, pull all slack in rope out innerside of fan housing and allow pulley tounwind slowly until spring tension is re-lieved. Remove the slotted hex headscrew retaining pulley to post andremove starter pulley and cup with flatretaining washer. Remove the rewindspring and, if so equipped, the spring

shields, from fan housing. Remove ropefrom pulley and handle.

Starter pulley post in fan housing isnot renewable; a new fan housing mustbe installed if post is broken loose, or onmid-range production models withoutstarter post bushing, if post is worn sothat pulley is not held in proper position.Renew flanged bushing on early produc-tion modeis if bushing is worn excessive-ly and fan housing is serviceable. Renewrope bushing if worn.

To reassemble, proceed as follows: Donot lubricate starter spring, but applylight oil sparingly to starter post,bushing (if used) and bore of starterpulley. Place outer shield (if used) in fanhousing, then install rewind spring with

1. (Intund wire2. Ij^nition switchfi. Blower (fan) housing7. Bushing8. Starter rofH"9. Ihmd grip

10. Insert11. Rewind spring12. Rn|>e pulleyhS. Starter cup14. Washer15. S(K'ket head strewlt>. Flywheel nut17. Lock washer18. Flat washer20. Pawl studs21. Pawls22. Washers23. Pawl springs24. Rutatinj^ screen25. Flywheel

22 23 4Fig. HL4B —Exploded view of early rewind starter components and related parts. Starter unit is

mounted on shaft (starter post) which is an integral part of the blower housing.

Fig. HL44~ Automatic oii pump worm gear (W)driven by crankshaft turns plunger (P) at 1/20engine speed. As piunger turns, cam on end ofplunger engages cam screw (C) causing theplunger to go back and forth. Fiat end of plunger

acts as inlet and outlet valve.

22

Fig. HLSO —Exploded view of later production rewind starter.

Fig. HL47—View showing easy method for in-stalling late type clutch shoes and springs on

clutch plate.

1. Ground lead2. "ON OFF" switch;i. Switch plate6. Fan housing

HA. Bushing7. Rope bushing8. Starter rope9. Starter handle

10. Insert11. Inner spring shield12. Rewind spring13. Outer spring shield14. Starter pulley15. Spring lock

15A. Spring lockbushing

16. Retaining washer17. Hex head screw18. Crankshaft nut19. Lock washer20. Flat washer21. Screen retaining

nuts

22. Pawl studs23. Starter pawls24. Washers25. Pawl springs2<>. Air screen27. Rotor (flywheel)

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SERVICE MANUAL HOMELITE

loop in outer end over spring post in fanhousing and install inner spring shield (ifused). Attach starter cord to pulley, in-sert rope through rope bore or bushingin fan housing and attach handle and in-sert to outer end of rope. Wind rope on-

F/g. HL5f - When installing starter pawls (2i),be sure pawl return springs (23) are located inflywheel vanes so they are parallel to the pawls

as shown.

to starter pulley. Place pulley andstarter cup (with spring lock and springlock bushing if integral pulley and lockare used) on starter post and be surespring lock or pulley is properly engagedwith rewind spring. Install retainingwasher and hex head screw and tightenscrew to 50 in.-lbs. (5.6 N'm). Pull ropeout about two feet and hold pulley fromturning. Locate notch in pulley at cordinsert in housing and pull up loop of cordbetween notch and housing. Holding on-to pulley, wind cord three more turnsonto pulley by turning pulley, then letspring rewind pulley until handle ispulled against fan housing.

179