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 1243 of 1313
SYSTEM FAILS TO DEFLATE, PARTIALLY DEFLATES, OR TIRE PRESSURES ARE IMBALANCED -
Continued
STEP
3.
ARE THERE AIR LEAKS FROM PNEUMATIC CONTROLLER?
a.
Set CTIS switch to HWY and run engine at 1000 rpm for three to five minutes to build air supply to normal
operating pressure.
b.
Stop engine.
c.
Turn battery switch to OFF position.
d.
Refer to point to point schematics.
T0900DAA
PNEUMATIC
CONTROLLER
(CAB)
Figure 3.
Pneumatic Controller.
e.
Check for air leaks from pneumatic controller.
f.
Use soapy water at connectors to check for leaks.
CONDITION/INDICATION
ARE THERE AIR LEAKS FROM PNEUMATIC CONTROLLER?
DECISION
YES - Repair or replace pneumatic controller (Volume 5, WP
0810). Go to Step (11) to verify problem is solved.
NO - Go to Step (4).
TM 9-2320-272-23-1
0148
0148-4
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