TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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TM 9-2320-280-34 3 - 19. ENGINE INJECTION PUMP TIMING (Cont’d) b. Timing Adjustment WARNING Never adjust injection pump timing with engine running or injury to personnel and damage to equipment may result. 1. Loosen three nuts (7) securing injection pump (6) to timing chain cover (5). NOTE Moving injection pump .03 in. (.8 mm) is equal to approximately 1° of injection pump timing. 2. Move injection pump (6) clockwise to retard timing or counterclockwise to advance timing. 3. Tighten three nuts (7) securing injection pump (6) to timing chain cover (5) and recheck timing (para. 3-19a). FOLLOW-ON TASKS: • Install companion seat and battery box cover (TM 9-2320-280-20). • Install engine access cover (TM 9-2320-280-20). • Lower and secure hood (TM 9-2320-280-10). 3-43