TM 9-2330-379-14&P
SERVICE BRAKE ASSEMBLY - CONTINUED
ACTION
LOCATION
ITEM
REMARKS
REASSEMBLY- CONTINUED
NOTE
Before reinstalling the brake air chamber assembly
power unit, reposition the wedge assembly so the
rollers and roller cage are engaged in the plunger
slots. This is accomplished automatically by simply
aligning the two tabs on the wedge spring retainer
with corresponding grooves in the wedge bore of the
plunger housing.
21
Brake
Brake air chamber
Position brake air assembly (13), collet
assembly
assembly (13),
nut (14), and wedge assembly (15) in
collet nut (14)
proper order for insertion in rear of
wedge assembly
right side plunger housing (7) (plunger
(15) and plunger
housing containing adjustable plunger).
housing (7)
NOTE
The air chamber power unit should be threaded into
the wedge bore of the plunger housing to a depth
such that the wedge is ready to lift the plungers off
of the abutment seats at the first movement of the
diaphragm. The bottoming out power unit is
designed to "bottom out" in the wedge bore and
provide this optimum adjustment automatically.
22
Brake air chamber
a.
Install brake air chamber assembly
assembly (13),
(13) and wedge assembly (15) into rear
wedge assembly
of right side plunger housing (7) by
(15), plunger
screwing air chamber assembly into
housing (17)
position.
b.
After the wedge assembly has been in-
stalled in the plunger housing, check
roller-plunger for correct engagement by
pushing on wedge rod by hand, while
checking for plunger and brake shoe
lift.
c.
Measure the standout of the wedge rod
from the end of the threaded housing
bore. When properly assembled, the
wedge standout is 1-1/4 inch.
4-117
