TM-9-2320-386-24-1-1
2-1/2-TON, 6X6, M44A3 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; EXTENDED SERVICE PROGRAM (ESP); UNIT, DIRECT SUPPORT AND GENERAL SUPPORT; MAINTENANCE MANUAL; VOLUME 1 OF 2
MAY 2001
TM-9-2320-386-24-1-1 - Page 97 of 1078
TM 9-2320-386-24-1-1
0014 00
0014 00-4
Compressed Air and Brake System Troubleshooting (Contd)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 7. Place front wheel drive lock-in switch in ON position.
Step 8. Check reading on test gauge and compare reading to instrument panel air pressure gauge.
a. If reading is zero, replace front wheel drive lock-in switch (WP 0145 00).
b. If reading is lower than instrument panel gauge and air can be heard escaping from
transfer case vent, notify direct support maintenance.
Step 9. If air system is operating properly, notify direct support maintenance.
END OF TESTING!
7. AIR HORN DOES NOT WORK
Step 1. Refer to Electrical Troubleshooting, WP 0011 00.
Step 2. If malfunction still exists, perform malfunction 1, test 2, steps 1 through 4.
If air pressure reading of test 2 is comparable to air pressure gauge on instrument panel,
replace air horn (TM 9-2320-361-20).
END OF TESTING!
8. AIR LEAKING FROM AIR DRYER PURGE VALVE, OR CONTINUOUS PURGE CYCLE
Step 1. Check for plugged or frozen purge orifice.
a. If plugged, clean purge orifice.
b. If frozen, refer to Electrical Troubleshooting, WP 0011 00.
Step 2. Check for faulty air governor.
a. Disconnect air line from purge valve.
b. If purge air stops from purge valve but continues from air line, replace air governor
(WP 0170 00).
c. If purge air continues, replace air dryer (WP 0281 00).
END OF TESTING!
9. WATER PRESENT WHEN DRAINING AIR RESERVOIRS
Step 1. Refer to Mechanical Troubleshooting, WP 0009 00.
Step 2. Check if an excessive amount of water is seen purging from air dryer.
If cloudy/milky discharge is seen, replace desiccant and coalescing filter (WP 0281 00).
END OF TESTING!
END OF WORK PACKAGE
Back to Top
