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 1133 of 1313
SPRING BRAKES DO NOT RELEASE (VEHICLE BRAKES GRAB OR DRAG) - Continued
STEP
3.
DOES OIL ON PARKING BRAKE VALVE MECHANICAL ACTUATOR CAUSE IT TO MOVE FREELY?
a.
Pull back rubber boot.
T0297DAA
ACTUATOR
BRAKE
LEVER
Figure 3.
Parking Brake Control Lever.
b.
Apply a few drops of light machine oil to the parking brake valve mechanical actuator.
c.
Move mechanical actuator by hand to check for sticking.
CONDITION/INDICATION
DOES OIL ON PARKING BRAKE VALVE MECHANICAL ACTUATOR CAUSE IT TO MOVE FREELY?
DECISION
NO - Go to Step (4).
YES - Go to Step (8) to verify problem is solved.
TM 9-2320-272-23-1
0135
0135-4
Back to Top
