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 0006 00 0006 00-23 MECHANICAL SYSTEMS TROUBLESHOOTING - UNIT (Contd) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 2. DELIVERY PUMP DISPENSES FUEL SLOWLY FROM BOTH TANKS (Contd) 4. Check operation of discharge valve control levers. 5. Check transfer case PTO operation. 1. If control levers are not operating properly, remove and inspect (WP 0264 00). 2. If control lever assembly components are defective, replace (WP 0264 00). If transfer case PTO is not operating, refer to WP 0006 00, table 17, malfunction 4. 3. FUEL DOES NOT PUMP OR PUMPS SLOWLY FROM SELECTED TANK, AND FUEL DRAINS SLOWLY FROM SELECTED TANK USING GRAVITY PROCEDURES 1. Check discharge control cables for proper lubrication (WP 0020 00). 2. Check discharge control cable for breaks or kinks. 3. Check discharge control cable for proper adjustment. 4. Inspect discharge valve tubes for bent, crushed, broken, or leaking tubes. 5. Inspect discharge valves for proper operation. Lubricate discharge control cable if necessary (WP 0020 00). If discharge control cable is broken or kinked, replace (WP 0264 00). If control cable needs adjustment, remove slack in cable (WP 0264 00). If discharge valve tubes are bent, crushed, broken, or leaking, replace (WP 0266 00). If discharge valves are broken or inoperative, replace (WP 0263 00). 4. FUEL TANK COMPARTMENTS CANNOT BE SUCTION FILLED 1. Check delivery pump propeller shaft for broken universal joints or broken shaft. 2. Perform fuel filter separator check (TM 9-2320-361-10). 3. Check delivery pump strainer for restrictions. 1. If shaft is broken, replace (WP 0292 00 or WP 0293 00). 2. If universal joints are broken, replace (WP 0141 00). If fuel filter separator is restricted, replace (WP 0286 00). 1. If strainer is restricted, clean or replace (WP 0284 00). NOTE If No. 2 diesel fuel is being used and ambient air temperature is 32 °F (0 °C), the outlet pressure may fall as low as 5 psi (34.5 kPa). This could cause slow or no delivery of fuel to delivery pump. Refer to TM 9-2320-361-10 for fuel separator inlet and outlet pressure differences. 2. If fuel system is clean and pressure is low, replace delivery pump (WP 0280 00). Table 19. Fuel Tank (M49A2C) Troubleshooting Procedures (Contd).