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TM 9-2320-364-20-2
2-1768
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 OK.
Air chambers OK.
Brakes faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Visual inspection.
If brake components are faulty,
they will prevent brakes from
releasing.
YES
NO
Replace brake shoes
and/or wedges
(Para 12-2).
Verify repair, go to
Step 6 of this Fault.
5.
Are brake shoes and wedges
free of damage?
4.
Does air chamber operate
correctly?
Replace air chamber
(Para 12-10).
Verify repair, go to
Step 6 of this Fault.
YES
NO
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 OK.
Air chambers faulty.
Brakes faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Operation test.
If air chamber rods bind as they
travel out of chambers, they will
not permit parking brake to
release.
WARNING
WARNING
Read WARNING
on Page 2-1769
Read WARNING
on Page 2-1769
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