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 1139 of 1313
SPRING BRAKES DO NOT SET (GAUGES AT NORMAL OPERATING PRESSURES, AIR EXHAUSTING NOT
HEARD WHEN PARKING BRAKE APPLIED) - Continued
STEP
1.
IS THE SPRING BRAKE RELEASE CONTROL OUT?
Verify that spring brake release control is not out.
T0307DAA
SPRING BRAKE
RELEASE CONTROL
Figure 1.
Spring Brake Control.
CONDITION/INDICATION
IS THE SPRING BRAKE RELEASE CONTROL OUT?
DECISION
YES - Push spring control in. Go to Step (5) to verify problem is solved.
NO - Go to Step (2).
TM 9-2320-272-23-1
0136
0136-2
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