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TM 9-2320-364-20-2
2-1808
8. SERVICE BRAKES ON AXLES NO. 3 THROUGH NO. 5 DO NOT APPLY (CONT).
3.
Does front double check
valve (top) operate correctly?
Replace front double
check valve (top)
(Para 12-11).
Verify repair, go to
Step 5 of this Fault.
YES
NO
Brakes adjusted.
Air lines free of crimps or leaks
and fittings, valves free of
leaks.
Brake treadle valve OK.
Front double check valve (top)
faulty.
Quick release valve faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Front double check valve (top)
test.
If front double check valve (top)
fails closed, it will prevent relay
valves from actuating and
applying brakes.
WARNING
Read WARNING
on Page 2-1809
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