TM 9-2320-273-20
BRAKE SYSTEM.
9-37. REAR BRAKE AIR CHAMBER MAINTENANCE (Continued).
LOCATION/lTEM
ACTION
REMARKS
Do not use an impact wrench with a
torque setting higher than 30 Ib-ft
(41 N·m) to cage power spring.
1. Wheels
Block.
2. CAB/Park brake control (1).
Push to release park brakes.
3. Cap(15).
Pull out from access hole (14).
4. Release nut (3) and
Unscrew from release stud (13).
washer (16).
Remove stud from its holder.
5. Release stud (13).
a. Insert stud through access
hole (14) and turn 1/4 turn
to secure cross pin into
pressure plate.
b. Screw on nut (3) and washer
(16).
c. Turn release stud assembly
with wrench until compres-
sion spring is fully caged.
6. Manual drain valves (2).
a. Turn to drain air pressure.
Exhaust pressure from both
service reservoirs on the
M915, M916, and M918 and
all three service reservoirs on
the M917, M919 and M920.
b. Close drain valves.
7. Two air lines (4).
a. Use tape to mark air lines.
This will help you connect
them properly during
installation.
b. Unscrew and remove
Replace if necessary.
c. Inspect for:
1. Cracks.
2. Leaks.
3. Damaged fittings.
8. Cotter key (10) and pin (11).
Remove.
9. Yoke (8).
Disconnect from slack adjuster (9).
10. TWO nuts (7), Iockwashers
Unscrew and remove. Remove
(6), and flat washers (5).
air chamber (12).
9-166
