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 This task covers: a. Timing Check b. Timing Adjustment INITIAL SETUP: Tools Manual References General mechanic's tool kit: TM 9-2320-280-10 automotive (Appendix G, Item 1) TM 9-2320-280-20 Special Tools Equipment Condition Timing bracket gauge (Appendix G, Item 20) • Hood raised and secured (TM 9-2320-280-10). Dynamic timing meter (Appendix G, Item 21) • Engine access cover removed (TM 9-2320-280-20). • Companion seat and battery box cover removed Materials/Parts (TM 9-2320-280-20). Metallic wool (Appendix B, Item 60) General Safety Instructions Personnel Required Never adjust timing while engine is running. One mechanic One assistant Maintenance Level Direct support a. Timing Check NOTE Magnetic pickup receptacle on timing bracket must be correctly positioned or timing meter will not register correctly. 1. Insert timing bracket gauge into magnetic pickup receptacle (8) on timing bracket (1). 2. Rotate timing bracket gauge so pointer on gauge fits into TDC notch (9) in timing bracket (1). 3. If pointer on gauge does not fit exactly into TDC notch (9), bend magnetic pickup receptacle (8) until pointer on gauge fits exactly into TDC notch (9). 4. Remove timing bracket gauge from pickup receptacle (8) on timing bracket (1). NOTE End of magnetic pickup must be .06 in. (1.5 mm) from torsional damper. 5 Install magnetic pickup (7) into magnetic pickup receptacle (8) and connect pickup lead (6) to timing meter. NOTE Clamp-on pickup must be used on a straight section of tube no further than 4 in. (10 cm) from injection nozzle. 6. Clean cylinder number one injection line (2) with metallic wool. CAUTION Do not overtighten clamp-on pickup or damage to pickup will result. 7. Install pickup (4) on injection line (2). 8. Connect ground clip (3) to fuel injection line (2) and connect pickup lead (5) to timing meter. 9. Route power leads of timing meter into battery compartment and connect red power lead (11) to positive battery terminal (12) on rear battery (14). 10. Connect black ground lead (10) to negative battery terminal (13) on rear battery (14). Display should light up and read: SE-1 20.0. 3-40