TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks
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TM 9-2320-361-24-1 0008 00 0008 00-16 MECHANICAL SYSTEMS TROUBLESHOOTING - DIRECT SUPPORT (Contd) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 2. LOW FUEL SUPPLY AT INJECTOR NOZZLES 1. Check fuel injection pump timing to engine (WP 0069 00). WARNING Ensure fuel shutoff valve is off and remove throttle cable before cranking engine. Failure to do so may result in injury to personnel. 2. Check fuel injection pump internal timing. a. Ensure fuel shutoff valve is off. b. Remove radiator (WP 0077 00). c. Slowly rotate crankshaft in clockwise direction (TM 9-2815-210-34-1). Stop crankshaft rotation when correct timing mark on crankshaft damper is 2 in. (560.8 mm) before engine timing pointer. d. Place fuel shutoff cable in RUN position and throttle lever in FUEL LOAD position. e. Remove plug from hydraulic head delivery valve. f. Remove valve spring and install plug in delivery line. g. Remove No.1 injector fuel delivery line from No.1 injector. h. Remove timing cover located on fuel injector advance unit (WP 0069 00). i. Operate in-tank fuel pump. j. Slowly turn engine crankshaft in clockwise direction. Fuel flow should be evident from No. 1 injector fuel delivery line until damper timing mark aligns with engine timing pointer. If fuel injection pump timing to engine is incorrect, adjust to specifications (WP 0069 00). If no fuel flows or fuel continues to flow to No. 1 injector line when advance unit hub timing mark is 1/16 in. (1.6 mm) from advance unit timing pointer replace fuel injection pump (WP 0069 00). 3. FUEL INJECTORS INOPERATIVE Perform WP 0008 00, table 2, malfunction 1, test 1. Replace defective components. Table 2. Fuel System Troubleshooting Procedures (Contd).