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TM 9-2320-364-20-2
2-1788
6. PARKING BRAKES ON AXLES NO. 4 AND NO. 5 DO NOT APPLY (CONT).
Brakes on Axle No. 3 operate
correctly.
All parking brakes on Axles
No. 4 and No. 5 fail to apply.
Air lines crimped.
Relay spring valve No. 2
faulty.
Air chambers faulty.
Brakes faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Visual inspection.
YES
NO
Replace air lines
(Para 12-36 and
schematic
Fig 2-46).
Verify repair, go to
Step 6 of this Fault.
2.
Are air lines 2368, 2369, 2138,
2139, 2140, and 2141 free
from crimps?
If air lines are crimped, air will
not exhaust from air chambers
and parking brakes will not
apply.
WARNING
Read WARNING
on Page 2-1789
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