TM 5-3810-307-24-1-1
BRAKE CHAMBER (FRONT WHEELS)
Removal
a.
Relieve air system pressure by draining supply (depress pin in center of automatic drain valve), secondary,
and auxiliary air reservoirs.
WARNING
There may be residual pressure in air lines after air reservoirs are
drained. Wear eye protection when disconnecting air lines to prevent
injury.
b.
Tag and disconnect air lines from connectors (5, Figure 2-4-7) and tee (9).
c.
Back off counter nut (1) and unscrew brake chamber assembly (2) from wheel.
d.
Back off counter nut (3) and unscrew brake chamber assembly (4) from wheel.
e.
If necessary, remove connectors (5), adapters (6), washers (7), o-rings (8), and counter nut (1) from brake
chamber assembly (2).
f.
If necessary, remove tee (9), adapter (10), washer (11), o-ring (12), and counter nut (3) from brake
chamber assembly (4).
Repair
a.
Disassemble brake chamber assembly (2, Figure 2-4-7) as necessary to replace damaged, worn, and
defective components.
(1)
Loosen clamps (13), and remove hose (14) and clamps (13) from cover (20) and brake chamber
cylinder (19).
WARNING
Brake chamber assembly is adjusted to have spring tension. Personal
injury may occur if tension is not released prior to removing clamp and
separating cover from cylinder.
(2)
Release spring tension on brake chamber assembly (2) by backing spring release bolt (15) out of
brake chamber cylinder (19) to a minimum length of 3.08 in. (78 mm) from back of chamber body to
top of bolt head.
(3)
Match mark cover (20) to brake chamber cylinder (19), remove nuts (16), capscrews (17), clamp
halves (18), and separate brake chamber cylinder (19) and cover (20).
(4)
Remove diaphragm (21) from brake chamber cylinder (19).
(5)
Remove piston (22) from cover (20).
(6)
Remove snap ring (23) and guide (24) from cover (20).
(7)
Remove o-ring (25) from guide (24).
(8)
Remove snap ring (26), bushing (27), and collar (28) from cover (20).
