TM 9-2330-294-14
Figure 4-31. Fail-safe housing assembly.
and fail-safe chamber assembly should be ac-
Chamber Assembly Replacement
complished by direct support maintenance per-
sonnel.
c. Installation.
a. Removal.
(1) Insert wedge assembly into plunger housing
(1) Depressurize air system (para 4-38).
by following procedure in paragraph 4-34. Make
(2) Remove four cap screws and lockwashers
certain wedge assembly is properly seated.
securing dust shields to spider. Remove two dust
(2) Screw collet nut onto chamber assembly.
shield halves.
Screw brake air chamber assembly or fail-safe
(3) Disconnect airlines from air chamber and
chamber assembly into plunger housing until it
fail-safe unit and tag for identification at in-
bottoms (collet nut loose).
stallation.
(3) Aline air inlet ports with brake air lines by
(4) Use drift, or other blunt tool, and hammer
unscrewing air chamber assembly. Do not unscrew
to loosen collet nut.
air chamber assembly more than one full turn.
(5) Remove brake air chamber assembly or fail-
(4) Hand tighten collet nut: then tighten collet
safe chamber assembly by unscrewing from plunger
nut with drift and hammer 1 teeth or 3/16 turn.
housing. Remove collet nut from chamber assembly.
(5) Replace two dust shield halves and secure to
(6) Remove the inspect wedge assembly by
spider with four cap screws and lockwashers. Torque
following procedure in paragraph 4-34d.
screws 16-20 lb ft.
6. Repair. Repair of brake air chamber assembly
