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 TM 9-2330-331-14&P
0007 00
CAGING AND UNCAGING SPRING BRAKES
1. Caging Spring Brakes.
WARNING
Chock wheels to prevent semitrailer from moving when brakes are
released (caged). Failure to follow this warning may result in serious
injury or death.
NOTE
In the event of air system pressure loss, failsafe units on every axle will
automatically apply brakes. If semitrailer must be moved and there is not
enough air system pressure to compress spring in spring brake chambers
to release brakes, you will have to do this manually.
a.
Chock semitrailer wheels.
b.
Remove cap (5) from access hole (1).
NOTE
Brake chamber release studs may be stored in roadside toolbox.
c.
Remove nut (4), washer (3), and release stud (2) from air brake chamber (6).
d.
Insert tab end of release stud (2) in access hole (1) and turn release stud (2) 1/4 turn clockwise.
e.
Install washer (3) and nut (4) on release stud (2) using 3/4 in. wrench. Tighten nut until spring is
fully caged.
f.
Repeat steps b through e for remaining spring brake chambers.
g.
Remove wheel chocks and stow.
h.
Move semitrailer off traveled portion of road.
i.
Chock semitrailer wheels.
j.
Notify organizational maintenance.
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