Shindaiwa 357 Service Manual

Service ManualShindaiwa Chain SawsContentsSection page1 Model Designation and Identification ... 32 Troubleshooting ...

Section 2 TroubleshootingMechanical failure of any carburetor is far lesscommon than problems arising from contami-nated fuel, improper adjustment, o

Q Shindaiwa Inc. 1995100300, 300S, 360,488, 575, 577,680, 695 ChainBrakes(Figure 10.5)Section 10 Chain BrakesCHAIN BRAKES488, 575, 577, 680, AND 695L

Q Shindaiwa Inc. 1995 101Chain Brakes Section 10Remove the clutch cover from the saw (Figure10.6), and thoroughly clean all chips and oilresidue from

Q Shindaiwa Inc. 1995102Section 10 Chain BrakesBrake Band Inspect the brake band and discard anyband showing signs of excessive wear,bluing, crackin

Q Shindaiwa Inc. 1995 103Chain Brakes Section 10STEP 4. Insert a thin screwdriver between thebrake assembly and the crankcase, andgently pry the bra

Q Shindaiwa Inc. 1995104 Inspect the brake band for proper thick-ness (Figure 10.16) and also for possiblewear or “slotting” from the band supportson

Q Shindaiwa Inc. 1995 105Chain Brakes Section 10357 and 377Chain Brake(Figures 10.17 and10.18)The 357 and 377 chain brake mechanisms aresimilar in ap

Q Shindaiwa Inc. 1995106Section 10 Chain Brakes357 and 377Chain Brake(continued)InspectionWash all parts in clean solvent and then wipeor blow dry. I

Q Shindaiwa Inc. 1995 107Chain Brakes Section 10Inertial Testing35721Figure 10.20 Testing Inertial Brake Operation(357 shown)12Manually Testing, 357

Q Shindaiwa Inc. 1995108LUB-56All Shindaiwa saws feature Mikuni™ positivedisplacement oil pumps. See the accompany-ing Table for specific applications

Q Shindaiwa Inc. 1995 109Steady flow atbar pad; no oilto chain System is functioning properlyBubbles appearat dischargeport Oil tank is empty

Troubleshooting Section 21. FuelDrain all fuel into a clean container, anddiscard any fuel showing visible contaminationsuch as dirt or water. Be esp

Q Shindaiwa Inc. 1995110The quickest and most reliable way to mea-sure pump output is to run the saw with theguide bar and chain removed (Figure 11.4)

Q Shindaiwa Inc. 1995 111Oil Pumps Section 11STEP 4. Remove the oil pump, and thenremove the pump elbow and gasket (whereused). (Figure 11.7).STEP 5.

Q Shindaiwa Inc. 1995112Section 11 Oil PumpsThe driven gear on pumps used on sawModels 488, 575, 577, 680, and 695 is re-placeable, and is available

Q Shindaiwa Inc. 1995 113Oil Pumps Section 11Using a magnifying glass and a strong light,inspect the pump shaft and bore for any signsof scoring or “

Q Shindaiwa Inc. 1995114Section 12 Rear Handles and A-V CushionsAll Shindaiwa saws feature extensive use ofrubber mounting cushions designed to isola

Q Shindaiwa Inc. 1995 115STEP 5. Using a small screwdriver, gently prythe dust caps loose to expose the cushionsretaining screws beneath (Figure 12.3

Q Shindaiwa Inc. 1995116 Inspect the rear handle for abuse ordamage such as stripped mounting holes,and discard if unrepairable. Be alert for anysign

Q Shindaiwa Inc. 1995 117STEP 5. Replace all mounting screws andlimiter bolts in the reverse order of removal. Screws installed in nylon handles sho

Section 13 Model 357 Top Handle SawThe 357 “Top Handle” saw is unique in theShindaiwa product line, and was designedand built specifically for the pr

Model 357 Top Handle Saw Section 13Q Shindaiwa Inc. 1995 119Figure 13.1 Major Components of the 357 Top-handle SawIgnitionModuleBrake LeverSupportCa

Q Shindaiwa Inc. 199512CRB-103Section 2 TroubleshootingGeneralTroubleshootingProcedures(continued)5. Spark Arrestor Screen and Exhaust Port(Figures 2

Q Shindaiwa Inc. 1995120Section 13 Model 357 Top Handle SawTeardown(continued)Remove the Clutch Cover (Figure 13.3)STEP 1. Disengage the brake by pu

Q Shindaiwa Inc. 1995 121Model 357 Top Handle Saw Section 13Remove the Starter Assembly (Figure 13.8)STEP 1. Remove the four starter assemblymountin

Q Shindaiwa Inc. 1995122Remove the Air Cleaner, Carburetor, andReed Valve Assembly (Figure 13.11)For easier access during 357 carburetorservice, insta

Q Shindaiwa Inc. 1995 123STEP 4. Peel the rubber grip from the handle,and then remove the phillips-head screwfrom the center of the handle.STEP 5. R

Q Shindaiwa Inc. 1995124Disassembly of the 357 should now becomplete. For general information on servicingsub-assemblies such as the chain brake,crank

Q Shindaiwa Inc. 1995 125Model 357 Top Handle Saw Section 13Crankcase Assembly Coat both crankcase mating surfaces witha thin, even coating of Three

Q Shindaiwa Inc. 1995126Oil Pump When installing the oil pump, grommet andhose assembly, be sure the grommet iscorrectly seated in its recess in the

Q Shindaiwa Inc. 1995 127Model 357 Top Handle Saw Section 13Adjust the High Speed Mixture(Engine running, warm)STEP 1. Briefly operate the engine at

Section 14 Appendix SpecificationsSpecifications subject to change without notice.300 300S 357 360 377 488 550 575 577 680 695 757ENGINEDisplacement

Appendix Specifications Section 14300 300S 357 360 377 488 550 575 577 680 695 757IGNITIONIgnition type Transitor “TCI” (300 through 377) CDI (488 th

Q Shindaiwa Inc. 1995 13Troubleshooting Section 27. Impulse Passage/Crankcase PressureTest The Impulse Passage,Models 488 and larger (Figure 2.14)Dis

Section 14 Appendix Torque ValuesQ Shindaiwa Inc. 1995130300, 300S, 360, 575, 680,Location* 377, 488 695 577 757 357Engine Crankcase 61-70 (70-80) 70

Values given in inch/pounds (Kgfcm)Q Shindaiwa Inc. 1995 1311 in. = 25.4 mm 1 mm = .03937 in.1 in. = 2.54 cm 1 cm = .3937 in.1 ft. = 30.48 cm 1 cm = .

Section 14 Appendix Tolerances and Wear LimitsQ Shindaiwa Inc. 1995132Dimensions: inches (mm) 300 300S 357 360 377 488Piston Diameter use a micromete

Appendix Tolerances and Wear Limits Section 14Q Shindaiwa Inc. 1995 133Dimensions: inches (mm) 550 575 577 680 695 757Piston Diameter use a micromete

Q Shindaiwa Inc. 1995134GasolineWhat you need toknow abouttoday’s motorfuels...IMPORTANT!Ethanol will increase fuel octane rating by 2to 3 points and

Q Shindaiwa Inc. 1995 135Shindaiwa Recommends…If a trimmer or brushcutter must be storedlonger than 30 days, Shindaiwa recommendseither: all unused f

Q Shindaiwa Inc. 1995136Section 14 Appendix Special Service ToolsPiston Puller Assembly (all models) 72282-96300Piston Pin Adapter 20021-96660 (300

Q Shindaiwa Inc. 1995 137Appendix Special Service Tools Section 14APPENDIX—SPECIAL SERVICE TOOLSCLUTCH TOOLSClutch Shoe Puller 22154-96110 (300/300S

Q Shindaiwa Inc. 1995138Notes

Q Shindaiwa Inc. 1995148. Tank VentInspect the fuel tank vent for damage orclogging, and clean or replace as required.9. Carburetor AdjustmentsFigure

Q Shindaiwa Inc. 1995 15Troubleshooting Section 2TroubleshootingGuideDoes the engine crank OK?Faulty recoil starter.Fluid in the crankcase.Interna

Q Shindaiwa Inc. 199516Section 2 TroubleshootingTroubleshootingGuide(continued)Is the engineoverheating?Operator is overworkingthe machine.Carbu

Q Shindaiwa Inc. 1995 17Troubleshooting Section 2Pooracceleration.Clogged air filter.Muffler is clogged.Clogged fuel filter.Carburetor mixture

Q Shindaiwa Inc. 199518Section 2 TroubleshootingDiagnosingEngine SeizureSevere metal galling/transfer all around thepiston; even scoringFigure 2.19Pi

Q Shindaiwa Inc. 1995 19Troubleshooting Section 2Figure 2.21 Damage caused by overheating.Overheating causes apiston skirt to expandand score heavil

Q Shindaiwa Inc. 19952Attention StatementsThroughout this manual are statementssurrounded by boxes and preceded byspecial symbols:WARNING!A statement

Q Shindaiwa Inc. 199520GeneralOutright mechanical failures are unusual, andthe cause of a seizure can often be identifiedby viewing the piston through

Q Shindaiwa Inc. 1995 21SeizureChecklistShindaiwaP/N 60127Troubleshooting Section 2 SEIZURE CHECKLIST PLEASE CHECK THE APPROPRIATE BOX/RESPONSE1. Mod

Q Shindaiwa Inc. 199522Theory ofOperationSection 3 CarburetorsCRB-71Air FlowAir FlowFuel Flowat IdlePassagesHighPressureHighPressureFuel Flowto theMa

Q Shindaiwa Inc. 1995 23Carburetors Section 3Fuel SupplyCRB-14CRB-15Fuel PumpTo maintain a steady fuel supply throughoutvarying loads and operating p

Q Shindaiwa Inc. 199524Section 3 CarburetorsBefore attempting any carburetor adjustmentsor repairs: Inspect the air filter, and clean if necessary.(

Q Shindaiwa Inc. 1995 25Carburetors Section 3STEP 2. Note the mixture screw positionwhere engine speed first begins to de-crease; this is called the

Q Shindaiwa Inc. 199526300 and 300S–Adjusting theWYMSection 3 CarburetorsIdle Speed Adjustment (Figure 3.6)STEP 1. Start the saw and warm the engine

Q Shindaiwa Inc. 1995 27Carburetors Section 3General ServiceNotes(continued)Be alert for stripped threads or adjust-ments, missing or incorrect parts

Section 3 CarburetorsHDA and WTDissassembly(Figure 3.10)Figure 3.10 HDA and WT Carburetor Components (typical)CRB-58CRB-59WT CarburetorHDA Carbureto

CRB-76Carburetors Section 3Metering System (Figure 3.11)STEP 1. Unscrew the four metering coverretaining screws, and then remove themetering cover.ST

Q Shindaiwa Inc. 1995 3Model Designation and Identification Section 1Chain SawsModel 300Model 300SModel 360Model 377MODEL IDTypical locationSHINDAIWA

Q Shindaiwa Inc. 199530Section 3 CarburetorsHDA and WTDissassembly(continued)Figure 3.18 Mechanical Check ValvesWelch and Cup Plug RemovalTo expose t

Q Shindaiwa Inc. 1995 31Carburetors Section 3IMPORTANT!Neither valve type should be removedunless replacement is required. A capillaryscreen should a

Q Shindaiwa Inc. 199532Section 3 CarburetorsHDA and WTDissassembly(continued)CRB-21Diaphragms (continued) Place the individual diaphragms over aligh

Q Shindaiwa Inc. 1995 33Carburetors Section 3Reassembly is basically the reverse ofdisasembly, with the following additions orexceptions:Cup Plug and

Q Shindaiwa Inc. 199534Mixture Screws Reinstall the high-speed and low-speedmixture screws and springs. Preset each screw to the specificationsliste

Q Shindaiwa Inc. 1995 35Servicing Carburetors Section 3Fuel Flow (Figure 3.29)Walbro WYM carburetors feature a singlefuel nozzle inside an adjustable

Q Shindaiwa Inc. 199536STEP 4. Turn the pump body over, and thenremove the pump gasket, diaphragm, plate,and plate gasket.STEP 5. Using a small pick,

Q Shindaiwa Inc. 1995 37Carburetors Section 3Main Jet and O-ringDamage to the main jet is unusual, as the jetcan usually be cleaned in solvent and th

Q Shindaiwa Inc. 199538CRB-95Reassembly is basically the reverse of disas-sembly, with the following additions or excep-tions: Using a clean pencil e

Q Shindaiwa Inc. 1995 39Carburetors Section 3CRB-1011020304050600.51.01.52.02.53.03.54.00Minimum 10 psiReseat PressurePressure TesterFigure 3.38 Test

Q Shindaiwa Inc. 19954Chain SawsSection 1 Model Designation and IdentificationModel 488Model 575 (680 and 695 similar)57701Model 577Model 577PMODEL I

Section 4 Recoil StartersOperationExtending the starter rope rotates the starterreel, winding a recoil spring while simulta-neously causing a ratchet

Recoil Starters Section 4Recoil starters used on Shindaiwa saws canbe divided into the three basic types shown inFigure 4.1.Although some interchange

Q Shindaiwa Inc. 199542Section 4 Recoil StartersRemove the Starter Reel Remove the recoil reel retaining screw(counter-clockwise to remove).IMPORTANT

Q Shindaiwa Inc. 1995 43Recoil Starters Section 4GeneralCleaning andInspectionUse clean solvent to wash all parts exceptthe rope and handle, and blow

Q Shindaiwa Inc. 199544Section 4 Recoil StartersReassembly(typical,continued)Retainer TypeSTEP 1. Engage the recoil springs’s outerhook with the lock

Q Shindaiwa Inc. 1995 45Recoil Starters Section 4STEP 6. Thread the handle and stop washeronto the starter rope in the reverse order ofremoval, and

Section 5 Ignition SystemsConstruction(Figure 5.1)All current model Shindaiwa saws featuresolid-state magneto systems with electroni-cally controlled

Ignition Systems Section 5IGN-26MAGNET Expanding magnetic fieldPrimarycoilCurrentflowSecondarycoilFlywheelTCI(closed)Figure 5.2 TCI Ignition Operati

IGN-66For larger high-performance saws, Shindaiwauses a CDI (Capacitive Discharge Ignition)system. The CDI system provides a hotter andmore precisely

Ignition Systems Section 5Most ignition failures can be traced to a singlecomponent or connection. The goal of basictroubleshooting is to quickly per

Q Shindaiwa Inc. 1995 5Model Designation and Identification Section 1Chain SawsModel 757Model 357MODEL IDSpecifications subject to change without not

Q Shindaiwa Inc. 199550Section 5 Ignition SystemsSTEP 1.Test with an adjustable-gap spark testerRemove the spark plug and install the adjust-able-gap

Q Shindaiwa Inc. 1995 51IGN-71Ignition Systems Section 5STEP 4. Check the Exciter Coil Air Gap(Figure 5.7)Verify that the exciter coil air gap is adj

Q Shindaiwa Inc. 199552Section 5 Ignition SystemsTest the PrimaryWindings(Model 488 andlarger)Disconnect the spark coil primary lead, set theohmmeter

Q Shindaiwa Inc. 1995 53IGN-61Ignition Systems Section 5AdvancedTroubleshootingTechniquesUse of Ignition Analyzers (Figure 5.12)An ignition analyzer

Q Shindaiwa Inc. 199554STEP 1. Connect and adjust the analyzer asin testing for maximum firing voltage(previous page), and then connect theanalyzer’s

Q Shindaiwa Inc. 1995 55Ignition Systems Section 5This test will reveal high voltage arcing or“leakage” through the spark coil or secondarylead insul

Q Shindaiwa Inc. 199556Section 5 Ignition SystemsSTEP 1. Unplug the pulser coil from thesystem, connect the appropriate analyzerleads between the pu

Q Shindaiwa Inc. 1995 57Ignition Systems Section 5A flywheel simulator can duplicate the pulsat-ing magnetic field of a moving flywheel,allowing you

Q Shindaiwa Inc. 199558Section 5 Ignition Systems TroubleshootingTroubleshootingFigures 5.22, 5.23,5.24)Figure 5.22 Troubleshooting One Piece System

Q Shindaiwa Inc. 1995 59IGN-66 Troubleshooting Ignition Systems Section 5550, 575, 680 and 6951. Is the switch on? Is the switch workingproperly? (Th

Q Shindaiwa Inc. 19956CRK-27Section 2 Troubleshooting The 2-Stroke Cycle EngineTheory ofOperationFigures 2.1 and 2.2Spark plugCompression/CombustionE

Section 6 ClutchesGeneralA centrifugally engaged two-shoe or three-shoe clutch is standard on all Shindaiwachainsaws (Figure 6.1).All models use meta

Clutches Section 6Figure 6.6 Loosen the Saw ChainQ Shindaiwa Inc. 1995 6157702Clutch Removal(except Model757)NutsFigure 6.4 Remove the Clutch CoverC

Q Shindaiwa Inc. 199562STEP 4. Lock the engine crankshaft byremoving the spark plug and then insertinga plastic piston stop or length of startercord t

Q Shindaiwa Inc. 1995 63Clutches Section 6Clutch Hub/Drum Removal(Model 757)STEP 1. Make sure the chain brake is re-leased and that the saw chain is f

Q Shindaiwa Inc. 199564Section 6 ClutchesDisassemblyFigure 6.16 Prying the Boss from the Clutch BodyWARNING!Always wear protective eyewear whenworki

Q Shindaiwa Inc. 1995 65Clean all parts in solvent and then blow drywith compressed air. During inspection,replace any clutch component showing visibl

Q Shindaiwa Inc. 199566During reassembly, apply a light film of greaseto the clutch bearing, the oil pump drive gearthrust plate, and the inside bore

Q Shindaiwa Inc. 1995 67CLH-71Clutches Section 6Apply a light film of grease to the clutchbearing, the drive gear collar bore, and theinside bore of t

Q Shindaiwa Inc. 199568Section 6 ClutchesIMPORTANT!Clutch performance is directly related tochain and guide bar condition and adjust-ment! STEP 1. R

Q Shindaiwa Inc. 1995 69Clutches Section 6STEP 7. Using full throttle, make a test cut ina log or wooden block of a diameter equalto about one-half t

Q Shindaiwa Inc. 1995 7Troubleshooting The 2-Stroke Cycle Engine Section 2Figure 2.2 The burning mixture expands, forcing thepiston down and compres

Q Shindaiwa Inc. 199570Construction(Figure 7.1)Section 7 Cylinders and PistonsAll Shindaiwa saws feature cast aluminumcylinders with hard-chrome plat

Q Shindaiwa Inc. 1995 71Cylinders and Pistons Section 7CylinderRemoval(continued)STEP 4. Carefully pull the cylinder from thepiston and crankcase ass

Q Shindaiwa Inc. 199572Section 7 Cylinders and PistonsAll ModelsInstall piston pin removal tool p/n 72282-96300and the appropriate pin adapter over t

Q Shindaiwa Inc. 1995 73Cylinders and Pistons Section 7Inspection Cylinder BoreShindaiwa hard-chrome plated cylinderscannot be bored for reuse, and o

Q Shindaiwa Inc. 199574Piston (Figure 7.10) Inspect the piston for damage or wear.Discard any piston showing signs ofscuffing, scoring, cracking, loo

Q Shindaiwa Inc. 1995 75IMPORTANT!Shindaiwa piston pins are heat treated toproduce a hardened surface for extendeddurability and longer product life.

Q Shindaiwa Inc. 199576Section 7 Cylinders and PistonsAll Models Other than 757 (Figure 7.15)STEP 1. Lubricate the piston pin bearing andthrust washe

Q Shindaiwa Inc. 1995 77CYL-50Cylinders and Pistons Section 7Snap Ring Installation (Figure 7.18)IMPORTANT! Never attempt to reuse piston pin snapri

Q Shindaiwa Inc. 199578Section 7 Cylinders and PistonsReassembly(Continued)STEP 3. Orient the cylinder over the piston,and align the cylinder exhaust

Q Shindaiwa Inc. 1995 79Cylinders and Pistons Section 7Final AssemblyThe following procedures are typical. When indoubt, refer to the appropriate sec

Q Shindaiwa Inc. 19958Section 2 Troubleshooting The 2-Stroke Cycle EngineReed Valve Inductionas used on Model 357Figures 2.3 and 2.41. IntakeAs the p

Q Shindaiwa Inc. 199580Section 8 Engine CrankcaseAll Shindaiwa saw crankcases feature diecastaluminum alloy construction, producing thelightest possi

Q Shindaiwa Inc. 1995 81STEP 1. Lock the crankshaft by inserting asoft piston stop through the spark plug hole(Figure 8.4), and then remove the flywh

Q Shindaiwa Inc. 199582CRK-59Section 8 Engine CrankcaseSeparate theCrankcaseHalves(Two methods)CRK-53Figure 8.12 Using a Seal PullerFigure 8.9 Sepa

Q Shindaiwa Inc. 1995 83CRK-74Engine Crankcase Section 8STEP 2. Using an appropriate bearing driverand a soft-faced hammer, carefully tapeach bearin

Q Shindaiwa Inc. 199584Section 8 Engine CrankcaseInspection(continued)Crankshaft (Figure 8.16)The crankshaft assembly requires carefulinspection, esp

Q Shindaiwa Inc. 1995 850102030405060708090CRK-19Engine Crankcase Section 8TwistA crankshaft assembly can be twisted andpermanently damaged from a se

Q Shindaiwa Inc. 199586Section 8 Engine CrankcaseCrankcaseInspectionCrankcase integrity is essential to the basicdurability of any engine. A crankcas

Q Shindaiwa Inc. 1995 87Engine Crankcase Section 8ReassemblyBearing InstallationSpecial crankcase holders are required toproperly support the individ

Q Shindaiwa Inc. 199588CRK-55Section 8 Engine CrankcaseSeal InstallationCRK-17CRK-62Dead-blowHammerSealDriverFigure 8.24 Applying Liquid Gasket(not

Q Shindaiwa Inc. 1995 89Engine Crankcase Section 8ENGINE CRANKCASEBolts Part Diameter x TorqueModel Used Quantity Number Length in./lbs. (Kg/cm)300,

Q Shindaiwa Inc. 1995 9Troubleshooting The 2-Stroke Cycle Engine Section 24. Power (combustion)The fuel-air mixture expands rapidly as itburns, forci

Q Shindaiwa Inc. 199590STEP 7. Inspect bearing preload by slowlyrotating the crankshaft by hand and notingany unusual drag or stiffness. If suchpreloa

Q Shindaiwa Inc. 1995 91Engine Crankcase Section 8STEP 3. Install the remaining accessories andcomponents in the reverse order of re-moval. Consult a

Section 9 MufflersQ Shindaiwa Inc. 199592Figure 9.1 Muffler Installations, by ModelMUFFLERSEXH-54Special BoltGasketScreenCover757300, 300SEXH-53Lock

Mufflers Section 9Q Shindaiwa Inc. 1995 93Construction(Figure 9.1)All Shindaiwa saws feature high capacity steelmufflers with internal baffling and s

Q Shindaiwa Inc. 199594Section 9 MufflersMuffler Removal(refer to the explodedviews on the previouspage)Models 300 and 300SSTEP 1. Unscrew the two 5

Q Shindaiwa Inc. 1995 95Mufflers Section 9STEP 1. Inspect the muffler body for damagesuch as broken seams, stripped arrestorbolt threads, or loose b

Q Shindaiwa Inc. 199596Section 9 MufflersMuffler installation is the reverse of disassem-bly, but includes the following additional stepsor procedure

Q Shindaiwa Inc. 1995 97Mufflers Section 9STEP 5. Install the spark arrestor componentsin the reverse order of disassembly. Coatthe threads on both

Q Shindaiwa Inc. 199598Section 10 Chain BrakesEvery Shindaiwa saw features a lever-oper-ated chain brake designed to instantly stop allchain rotation

Q Shindaiwa Inc. 1995 99Chain Brakes Section 1057723Clockwiseto tightenFigure 10.4 Adjusting the Chain Brake(except 357, 377 and 757)Figure 10.3 Ch