TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks
Page 125 of 1176
TM 9-2320-361-24-1 0007 00 0007 00-1 FIELD TROUBLESHOOTING 2-1/2 TON, 6X6, M44A2 SERIES TRUCKS (MULTIFUEL) MECHANICAL SYSTEMS TROUBLESHOOTING INDEX - DIRECT SUPPORT ENGINE 1. Engine will not crank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-1 2. Starter cranks engine slowly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-3 3. Engine cranks but will not start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-3 4. Engine starts but stops when accelerator is operated . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-4 5. Engine stops when accelerator is returned to idle position . . . . . . . . . . . . . . . . . . . 0008 00-4 6. Poor acceleration and/or lack of power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-4 7. Engine delivers excessive black smoke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-5 8. Engine surges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-5 9. Engine misfires during operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-5 10. Engine stops during normal operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-5 11. Exhaust color blue during normal operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-5 12. Exhaust color white during normal operation and idle . . . . . . . . . . . . . . . . . . . . . . . 0008 00-8 13. Engine oil pressure low or zero at normal operating temperature . . . . . . . . . . . . . 0008 00-9 14. Engine oil pressure extremely high at normal operating temperature . . . . . . . . . . 0008 00-11 15. Engine oil loss during normal operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-11 16. Engine noise abnormal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-12 17. Engine vibration abnormal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-13 FUEL SYSTEM 1. No fuel at fuel injectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-14 2. Low fuel supply at injector nozzles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-16 3. Fuel injectors inoperative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-16 4. Fuel injectors deliver excess fuel into engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-17 COOLING SYSTEM 1. Coolant loss during normal operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-17 2. Coolant temperature excessive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-17 CLUTCH 1. Vehicle will not move or engine stalls with clutch engaged . . . . . . . . . . . . . . . . . . . 0008 00-17 2. Burning odor evident with clutch engaged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-18 3. Clutch noisy during engagement and disengagement . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-19 4. Vibration during clutch engagement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-19 5. Clutch pedal will not travel or depress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-20 MALFUNCTION TROUBLESHOOTING NO. MALFUNCTION WORK PACKAGE/PAGE