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TM 9-2320-364-20-2
2-1766
Replace relay spring
valve No. 2
(Para 12-17).
Verify repair, go to
Step 6 of this Fault.
3. PARKING BRAKES ON AXLES NO. 4 AND NO. 5 DO NOT RELEASE (CONT).
Brakes on Axle No. 3 operate
correctly.
All brakes on Axles No. 4 and
No. 5 fail to release.
Air lines and fittings OK.
Relay spring valve No. 2
faulty.
Air chambers faulty.
Brakes faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Relay spring valve No. 2 test.
YES
NO
3.
Does the relay spring valve
No. 2 operate correctly?
If relay spring valve No. 2 fails in
the closed position, air pressure
will not exhaust and the brakes
will remain applied.
WARNING
Read WARNING
on Page 2-1767
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