TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks
Page 588 of 1176
TM 9-2320-361-24-1 0064 00 0064 00-2 SECONDARY AND FINAL FUEL FILTERS TESTING AND MAINTENANCE (Contd) TESTING FUEL PRESSURE WARNING Diesel fuel is flammable. Do not perform fuel system procedures near open flames. Injury or death to personnel may result. NOTE Fuel filters may have one or two bleeder valves. Remove only one bleeder valve for testing fuel pressure. 1. Remove bleeder valve (1) or (4) from top of fuel filter head (5). 2. Install adapter (3) and fuel pressure gauge (2) on bleeder valve (1) or (4) opening of fuel filter head (5). CAUTION Do not start engine. Starting engine may damage fuel pressure gauge. 3. Turn accessory switch to ON position (TM 9-2320-361-10) to start fuel pump. 4. Read pressure on fuel pressure gauge (2). a. If pressure reads at least 2 psi (13.8 kPa), condition of all fuel filters is satisfactory. b. If pressure reads below 2 psi (13.8 kPa), turn accessory switch to OFF position (TM 9-2320-361-10) and inspect fuel supply tubes (9) for damage. If necessary, replace primary fuel filter (WP 0063 00). If pressure is still not at least 2 psi (13.8 kPa), continue with fuel filter draining and replace secondary and final fuel filter. DRAINING WARNING Accidental or intentional introduction of liquid contaminants into the environment is a violation of state, federal, and military regulations. Refer to Army POL (WP 0001 00) for information concerning storage, use, and disposal of these liquids. Failure to do so may result in damage to environment and health of personnel. NOTE Use a drain pan to capture any draining fuel. Dispose of fluids in accordance with local policy and ordinances. Ensure all spills are cleaned up. 1. Open two drain valves (7) to drain fuel from secondary fuel filter housing (8) and final fuel filter housing (6). 2. Close two drain valves (7).