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TM-9-2320-361-24-1 Page 107

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

Page 107 of 1176


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MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION NO FUEL AT FUEL INJECTORS WARNING • Diesel fuel is flammable. Do not perform troubleshooting checks near open flame, sparks, or electricity. Injury or death to personnel may result. • Eye protection is required when performing fuel system troubleshooting checks. Failure to wear eye protection may result in injury to personnel. • Ignition switch must remain off during fuel system troubleshooting checks. Failure to verify that ignition system is turned off may result in injury or death to personnel. 1. Check fuel shutoff for proper operation. 2. Inspect fuel pump pickup tube for restrictions (WP 0061 00). 3. Check final fuel filters for restrictions (WP 0064 00). Adjust fuel shutoff for proper operating conditions (WP 0071 00). Clear restrictions from fuel pump pickup tube (WP 0061 00). 1. If final fuel filters are restricted or defective, replace (WP 0064 00). 2. If final fuel filters are not restricted and problem persists, refer to WP 0008 00, table 2, malfunction 1. TM 9-2320-361-24-1 0006 00 0006 00-11 MECHANICAL SYSTEMS TROUBLESHOOTING - UNIT (Contd) Table 5. Fuel System Troubleshooting Procedures. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION PERSONNEL HOT WATER HEATER DOES NOT HEAT CAB 1. Check to ensure engine reaches normal operating temperature. 2. Check personnel hot water heater for clogged, broken, or leaking inlet/outlet hoses. 3. Check for proper personnel hot water heater control cable and operation of heater, defroster, and heater diverter vents and doors. 4. Check heater blower motor and fan for proper operation (TM 9-2320-361-10). If engine does not reach normal operating temperature, refer to WP 0006 00, table 4, malfunction 2. If personnel hot water heater hoses are leaking or collapsed, replace (WP 0079 00). If control cables are bent or broken, replace (WP 0249 00). If damaged, replace personnel hot water heater (WP 0250 00). Table 6. Personnel Hot Water Heater Troubleshooting Procedures.