TM-9-2320-272-23-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 1 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-1 - Page 1081 of 1313
NO AIR PRESSURE (WARNING BUZZER SOUNDING, AIR PRESSURE NOT BUILDING TO NORMAL
OPERATING RANGE AS INDICATED BY GAUGES) - Continued
STEP
5.
IS AIR GOVERNOR OPERATING PROPERLY?
a.
Replace air governor with a known good governor (Volume 3, WP
0436).
T0259DAA
Figure 7.
Air Governor.
b.
Start engine and allow sufficient time for air to build to normal operating pressure.
c.
If air pressure gauges read 90 to 130 psi, air governor was not operating properly.
CONDITION/INDICATION
IS AIR GOVERNOR OPERATING PROPERLY?
DECISION
NO - Replace defective air governor (Volume 3, WP
0436). Go to Step (6) to verify problem is solved.
YES - Notify supervisor. Action may not be possible at this level of maintenance.
TM 9-2320-272-23-1
0126
0126-10
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