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TM 9-2320-364-20-2
2-1840
12. SERVICE BRAKES ON AXLES NO. 4 AND NO. 5 DO NOT APPLY (CONT).
2.
Are air
lines 2014,
2143, 2144,
2015, 2874, 2017, 2016 and
2018 free from crimps and/or
leaks and are fittings and
valve, air chamber free of
leaks?
Replace air lines and/or
tighten/replace fittings
and/or replace valve, air
chamber (Para 12-36,
12-10, and 12-15 and
see schematic Fig. 2-45
and 2-46). Verify repair,
go to Step 6 of this
Fault.
YES
NO
Brakes on Axle No. 3 operate
correctly.
Brakes on Axles No. 4 and
No. 5 fail to apply.
Air lines crimped or leaking
and/or fittings, valves or
air chambers leaking.
Service relay valve No. 3
faulty.
Air chambers faulty.
Brakes faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Visual inspection.
Audible inspection.
If air lines and/or fittings, valves
or air chambers are leaking,
loss of air pressure will prevent
brakes from applying.
WARNING
Read WARNING
on Page 2-1841
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