TM 9-2320-269-20-1
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
AIR SYSTEM AND BRAKES - CONTINUED
PARKING BRAKE WILL NOT HOLD - CONTINUED
Step 4. Check spring brake chambers (6) for spring tension.
a. Turn draincocks (7) open, let air drain, and turn closed.
b. Lift cap (8) off chamber (6), and unscrew nut (9) part way using 15/16-inch wrench.
c.
If spring (10) was caged by turning nut (9), go to step 5.
d. If nut (9) turned freely until contacting spring (10), replace chamber (6) (page 2-492).
Step 5. Inspect slack adjusters (11) for binding, and adjust brakes (page 2-485).
a. If slack adjuster (11), clevis (12), or pin (13) are damaged or dirty, clean or replace as
needed (page 2-485).
TA228634
2-123
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