TM9-2330-374-14&P
WARNING
W e a r protective goggles when
opening drain cock and avoid
the air stream.
b . O p e n drain cock (1, figure 3-6)
and allow pressure to drain.
Close drain cock (1).
c.
C o n n e c t air hoses to couplings
d.
CAGING FAILSAFES
NOTE
T h i s procedure is used to move
semitrailer when a brake line
or other parts fail.
a. Block semitrailer with chock blocks
t o prevent movement.
Remove plug (3, figure 3-7).
b.
from air brake chamber.
R e m o v e nut (5) and washer (6).
c.
C a g i n g failsafe
R e m o v e release tool (1) from mounting
hole (2) in spring brake.
Turn release
Insert release tool (1) through opening (4) in brake chamber.
d.
tool (1) 1/4 turn clockwise to lock in manual release position.
Install washer (6) and nut (5) on release tool (1).
Tighten until 2 1/2 to 2
e.
3 / 4 i n c h e s o f r e l e a s e t o o l ( 1 ) i s exposed.
Repeat steps b. through e. for remaining brake chambers.
f.
Move
semitrailer.
Remove and stow chock blocks.
g.
Re-chock wheels to prevent semitrailer movement.
h.
Notify Organizational Maintenance.
i.
