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 1132 of 1313
SPRING BRAKES DO NOT RELEASE (VEHICLE BRAKES GRAB OR DRAG) - Continued
STEP
2.
IS PARKING BRAKE VALVE MECHANICAL ACTUATOR STUCK IN ENGAGED POSITION?
a.
Turn off engine.
b.
Verify parking brake is released, then move mechanical actuator by hand to check for sticking.
T0297DAA
ACTUATOR
BRAKE
LEVER
Figure 2.
Parking Brake Control Lever.
CONDITION/INDICATION
IS PARKING BRAKE VALVE MECHANICAL ACTUATOR STUCK IN ENGAGED POSITION?
DECISION
NO - Go to Step (4).
YES - Go to Step (3).
TM 9-2320-272-23-1
0135
0135-3
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