TM 9-2330-371-14&P
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5B. CAGING FAlLSAFES (use on USA PAO1UX thru PAO21W)
NOTE
This procedure is used to move
semitrailer when a brake line
or other parts fail.
a. Block semitrailer with chock blocks
t o prevent movement.
b.
from air brake chamber.
c . R e m o v e nut (5) and washer (6).
Caging
failsafe
R e m o v e release tool (1) from mounting
hole (2) in spring brake.
--.
d
Insert release tool (1) through opening (4) in brake chamber.
Turn release
tool (1) 1/4 turn clockwise to lock in manual release position.
--.
e
Install washer (6) and nut (5) on release tool (1).
Tighten until 2 1/2 to 2
3/4 inches of release tool (1) is exposed.
f.
Repeat s t e p s b . t h r o u g h e . f o r r e m a i n i n g b r a k e c h a m b e r s .
Remove a n d stow chock blocks.
Move semitrailer.
g.
h.
Re-chock wheels to prevent semitrailer movement.
i.
Notify Organizational Maintenance.
5C. BRAKE SYSTEM (use on USA PAO1UX thru PA021W)
1.
BRAKES WILL NOT RELEASE.
Step 1.
Build up pressure in semitrailer brake system if semitrailer is
coupled.
semitrailer is uncoupled.
Replace defective relay valve (para. 4-38).
If emergency relay valve operating, go to step 2.
Step 2.
Check intervehicular air hose connections to towing vehicle.
Connect intervehicular air hoses properly.
If air hoses are connected properly, go to step 3.
Change 1
4-20.2