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TM 9-2320-364-20-2
2-1752
2. PARKING BRAKES ON AXLE NO. 3 DO NOT RELEASE (CONT).
Parking brakes on Axles No. 4
and No. 5 operate correctly.
Both brakes on Axle No. 3 fail
to release.
Air lines crimped or leaking
and/or fittings leaking.
Relay spring valve No. 1
leaking.
Relay spring valve No. 1
faulty.
Air chambers faulty.
Brakes faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Visual inspection.
Audible inspection.
YES
NO
2.
Are air lines 2022, 2023, 2620
and 2075 free from crimps
and/or leaks and are fittings
free of leaks?
If air lines and/or fittings are
leaking, loss of air pressure will
prevent brakes from operating
properly.
WARNING
Replace air lines
and/or tighten/replace
fittings (Para 12-36
and schematic
Fig 2-45).
Verify repair, go to
Step 7 of this Fault.
Read WARNING
on Page 2-1753
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