TM 5-4320-302-146-4. ADJUSTMENT OF FUEL INJECTION TIMING (CONT)Location/ItemActionRemarksADJUSTMENTWARNINGSevere injury may result from contact with rotating engine parts, V-belts, or fan. Shutoff the engine when it is necessary to inspect, service, or perform maintenance onany moving parts.NOTEUse the following procedure to determine top dead center TDC if it has not beenmarked on flywheel or V-belt pulley. Normal running direction of engine, flywheel andcrankshaft is counterclockwise viewing flywheel from pump end. V-belt pulley alsoruns counterclockwise viewing from V-belt guard end.1.Flywheel orRotate crankshaft by rotating flywheel or V-belt pulley counter-V-belt pulleyclockwise until valve stems and rocker arms overlap. The ex-haust valve should be closing and its valve stem rising. The inletvalve should be opening and its valve stem going down.6-6
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