Shindaiwa DH254, X7502864301 manual Valve Adjustment

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Valve Adjustment

1.Remove cylinder cover, rocker arm cover, and set piston at TDC-compression.

2.Loosen adjuster locknut so that the

2.5 mm Allen socket head adjustment screw can turn freely.

3.Insert feeler gauge .004 (0.10 mm) for both intake and exhaust; between valve stem tip and rocker arm.

4.Turn adjustment screw (clockwise = tighter, counter-clockwise = looser) until feeler gauge is almost snug. Back off just enough to allow gauge to slip out with limited resistance.

5.While holding adjustment screw in place with Allen driver, tighten locknut with wrench.

6.Turn engine over several times, and return to TDC-compression. Recheck with proper feeler gauge to make sure clearance adjustment did not change as a result of tighten- ing locknut. Readjust as necessary.

7.Replace rocker arm cover gasket to assure proper sealing and install cover.

IMPORTANT!

If new gasket is not available and/or old gasket is not damaged, old gasket may be reused. Never use cracked or damaged gaskets!

Figure 23

Figure 24

Figure 25

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Contents
DH254 Hedge Trimmer Contents IntroductionGeneral Safety Instructions Work SafelyStay Alert Minimize the Risk of FireOperating Precautions Safety Equipment and Labels SpecificationsUnit Description Emission Control Exhaust & EvaporativePrior to use Assembly Blade Stiffener RemovalInstall Blade Stiffener Mixing FuelHandling Fuel Filling the Fuel TankAfter use Minimize the Risk of FireCranking the Engine Starting ProcedureRecoil starter can be easily damaged by abuse When the motor starts Starting a Flooded EngineStopping the Engine If the Engine Does Not StartDaily Maintenance/Inspection Maintenance and AdjustmentsAir Filter Throttle Cable Free Play Hour MaintenanceMore frequently in dusty conditions 10/15-Hour Maintenance Every 10 to 15 hours of operationHour or Annual Maintenance Gearcase LubricationBlades Every 20 HoursValve Adjustment Spark Arrester Screen Maintenance Carburetor AdjustmentIdle Speed Adjustment Long Term StorageTroubleshooting Guide Possible CauseIs the engine overheating? Symptom Possible Cause Remedy Exceptions Purchased Repair Parts and Accessories 99922201033 Page Page Page Servicing Information Parts/Serial Number