TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks
Page 176 of 1176
TM 9-2320-361-24-1 0010 00 0010 00-16 COMPRESSED AIR AND BRAKE SYSTEM TROUBLESHOOTING (Contd) Table 3. Compressed Air Troubleshooting Procedures (Contd). MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 4. LOW OR NO READING ON AIR PRESSURE GAUGE, AND WARNING BUZZER SHUTS OFF Test 1. Check air supply pressure to air pressure gauge (1). 1. Stop engine and open all drain valves (TM 9-2320-361-10) until brake system is completely drained of air. 2. Disconnect air supply line (2) from air pressure gauge adapter (3). 3. Connect air supply line (2) to test gauge (4). 4. Start engine (TM 9-2320-361- 10) and allow air pressure to build up to normal operating pressure. NOTE Air pressure gauge on instrument panel has a maximum pressure reading of 120 psi. If old governor has been replaced with new governor, air pressure may exceed maximum pressure reading on instrument panel gauge. 5. Check test gauge (4) reading. 1. If reading is low or zero, check air supply line (2) for bends, kinks, or leaks. Repair or replace air supply line if bent, kinked, or leaking (TM 9-243). 2. If reading is above 85 psi (586 kPa) on test gauge (4), replace air pressure gauge (1) (WP 0094 00). 5. WARNING BUZZER FAILS TO SOUND ON LOW AIR PRESSURE (BELOW 60 PSI) 1. Refer to WP 0014 00, table 1, malfunction 8.