TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download

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CAUTION ______ Ensure all cables and wires are clear from fan, belts, and exhaust manifolds before starting engine, or damage to equipment will result. NOTE If sensor light is not blinking, check clamp-on pickup fuel injection line for proper installation. 11. Depress offset adjustment switch (3) and hold. 12. Operate increase/decrease switch (2) until offset adjustment reads 9.5 for 6.2L engines and 30.5 for 6.5L engines on display (4). Release offset adjustment switch (3). Display (4) should not read: 0000 ... 0.0. 13. Start engine (TM 9-2320-280-10) and warm up to operating temperature. 14. Position sensor switches (1) to clamp-on and magnetic pickup positions. NOTE For vehicles with 1990 engines and above, timing must be 5° before top dead center. 15. Raise engine speed to 1300 rpm and read injection pump timing on display (4). Timing must be 4° before top dead center. If timing is not 4° before top dead center, stop engine (TM 9-2320-280-10) and adjust timing (para. 3-19b). 16. Disconnect timing meter. 3-19. ENGINE INJECTION PUMP TIMING (Cont'd) TM 9-2320-280-34 3-42 Change 1