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TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 2 Download

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Change 1 14-5 TM 9-2320-387-24-2 MALFUNCTION TEST OR INSPECTION END OF TESTING! 7. EXCESSIVE ENGINE VIBRATION Step 1. Check for air in fuel lines. Bleed air from fuel lines (para. 3-33). Step 2. Remove and test fuel injection nozzles. Replace defective fuel injection nozzles (para. 16-3). Step 2.1. Check defective fuel injection pump. Replace defective fuel injection pump (para. 16-6). Step 3. Check for broken engine mounts. Replace broken engine mounts (para. 15-3). Step 4. Remove converter housing cover (para. 5-11 or 5-12) and tighten torque converter capscrews to 32 lb-ft (43 N•m). Step 5. Check for loose or damaged torsional damper. Replace if damaged (para. 15-7). Step 6. Check for damaged flywheel and missing counterweight on flywheel. Replace flywheel if damaged or counterweight is missing (TM 9-2815-237-34). END OF TESTING! 8. EXCESSIVE EXHAUST SMOKE a. Black Smoke Step 1. Check for restricted exhaust pipe, catalytic converter, muffler, and intake manifold. Replace exhaust pipe (para. 3-48), catalytic converter, muffler (para. 3-49) or intake manifold (para. 15-16 or 15-17) if restricted. Step 2. Remove and test fuel injection nozzles. Replace worn fuel injection nozzles (para. 16-3). Step 3. Check fuel injection pump timing (para. 15-23). Step 4. Check for worn or damaged fuel injection pump. Replace worn or damaged fuel injection pump (para. 16-6). END OF TESTING! b. White Smoke Step 1. Perform step 2 of malfunction 12. Step 2. Remove and test glow plugs. Replace inoperative glow plugs (TM 9-2815-237-34). Step 3. Remove and test fuel injection nozzles. Replace worn fuel injection nozzles (para. 16-3). Step 4. Check for worn or damaged fuel injection pump. Replace worn or damaged fuel injection pump (para. 16-6). END OF TESTING! c. Blue Smoke Step 1. Perform step 3 of malfunction 2. Step 2. Check for worn valve oil seals. Replace worn valve oil seals (TM 9-2815-237-34). Step 3. Check for worn valve guides. Replace worn valve guides (TM 9-2815-237-34). Step 4. Check for worn or damaged pistons and piston rings. Replace worn or damaged pistons and piston rings (TM 9-2815-237-34). Step 5. Check for worn or damaged cylinder block. Replace engine (para. 15-26) if cylinder block Table 14-1. Mechanical Troubleshooting (Cont’d).