TM 5-3810-306-20
BRAKE CHAMBER ASSEMBLY
TOOLS:
General mechanic’s tool kit: automotive (5180-00-177-7033)
SUPPLIES:
None
EQUIPMENT CONDITIONS: Brake chamber assembly removed. (Refer to page 11-4.)
DISASSEMBLY:
1.
DISASSEMBLE WEDGE ASSEMBLY.
WARNING
Wedge assembly is under pressure.
Quick release of spring pressure can
cause injury.
CAUTION
Use a vise with soft metal covers on
jaws to compress and hold spring (5).
a. Compress and hold retaining spring (5) and
remove snap ring (7) from wedge shaft.
Carefully release spring (5).
b. Remove retaining washer (6) wedge spring (5)
and spring retainer (4) from cage (2).
CAUTION
Do not attempt to drive wedge (1)
through rollers (3) and cage (2) or
force
rollers
(3)
through
slightly
closed slots of cage. This will
permanently damage cage (2).
c. Insert a thin bladed screwdriver between one flat
of wedge head and the roller retainer cage (2).
Spread cage (2) open just far enough to remove
rollers(3).
d. Remove roller retainer cage (2) by sliding it off
wedge shaft (1).
2.
DISASSEMBLE BRAKE CHAMBER.
WARNING
Ensure spring brake chamber (18) is
caged before continuing.
a. Remove clamp ring nuts (10) and bolts (11).
Clamp ring (9) is nearest threaded tube.
b. Spread clamp ring (9) and remove spring brake
chamber (18) from non-pressure housing (12).
NOTE
Spring brake chamber (18) containing
large spring can be removed to
service remainder of the assembly,
after spring is caged, but is not
serviceable itself.
c. Remove diaphragm (17), diaphragm plate (16),
push rod (15), boot (14) and wedge guide (13)
from non pressure housing (12).
INSPECTION:
1.
INSPECT WEDGE ASSEMBLY.
a. Inspect wedge rollers (3) for grooves or nicks
and replace if necessary.
11-8
