Covering the politics, Business and technology of defense - Subscribe Today
TM-9-2320-361-24-1 Page 145

TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks

Page 145 of 1176


Download
TM 9-2320-361-24-1 0008 00 0008 00-17 MECHANICAL SYSTEMS TROUBLESHOOTING - DIRECT SUPPORT (Contd) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 4. FUEL INJECTORS DELIVER EXCESS FUEL INTO ENGINE 1. Check fuel injection pump return line. 2. Check fuel injection pump timing to engine (WP 0069 00). 3. Check fuel injection internal timing (WP 0008 00, table 2, malfunction 2, step 3. 4. Check fuel injector nozzle operation (WP 0008 00, table 2, malfunction 1, step 2.) 5. See WP 0008 00, table 1, malfunction 3, step 3. If fuel return line is bent, kinked, or restricted, replace fuel return line (WP 0062 00). If fuel injection timing to engine is incorrect, adjust to specifications (WP 0069 00). Replace defective components as needed. Replace fuel injection pump if necessary (WP 0069 00). MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION WARNING • Hot coolant is under pressure. Care should be used when removing radiator filler cap or inspecting hot engine coolant leaks. Steam or hot coolant under pressure may cause severe injury to personnel. • Wear hand protection at all times when working with heated parts. Failure to do so may result in injury to personnel. 1. COOLANT LOSS DURING NORMAL OPERATION Flow test warm engine cooling system (TM 750-254). Observe flow test reading. 1. If flow test reading declines and there are no indications of external leaks, coolant is leaking internally into engine or combustion chambers. Remove oil dipstick and check engine oil for presence of coolant. 2. If coolant is present on oil dipstick, replace engine (WP 0046 00). 2. COOLANT TEMPERATURE EXCESSIVE Refer to WP 0006 00, table 4, malfunction 1. Table 2. Fuel System Troubleshooting Procedures (Contd). Table 3. Cooling System Troubleshooting Procedures. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 1. VEHICLE WILL NOT MOVE OR ENGINE STALLS WITH CLUTCH ENGAGED 1. Check transmission condition. Place transfer case in neutral and transmission in first gear. Engage clutch and observe transmission to transfer propeller shaft for evidence of rotation. 1. If engine stalls, disconnect transmission to transfer case propeller shaft for evidence of rotation. 2. Place transmission in neutral. If transmission will not turn, replace (WP 0131 00 and WP 0132 00) or repair transmission (WP 0450 00). Table 4. Clutch System Troubleshooting Procedures.