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 0014 00 0014 00-15 INDICATORS, GAUGES, AND WARNING SYSTEM TROUBLESHOOTING (Contd) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 8. LOW AIR PRESSURE WARNING SYSTEM DOES NOT COME ON BELOW 60 PSI AND DOES NOT GO OFF ABOVE 66 PSI Test low air pressure switch operation. Air pressure switch should open and close between 54 and 66 psi. 1. Turn power accessory switch to OFF position. 2. Turn air reservoir drain valve counterclockwise and drain reservoir (TM 9-2320-361-10) to less than 54 psi. Close drain valve. 3. Turn power accessory switch to ON position. Buzzer should operate. Warning buzzer should turn off at 66 psi and above. 4. Start engine (TM-9-2320-361-10) and allow air pressure to build up in air reservoir. If air pressure switch fails either test in step 3 or 4, replace air pressure switch (WP 0108 00). Table 1. Indicator, Gauges, and Warning System Troubleshooting (Contd).