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TM 9-2320-364-20-2
2-1872
15. SERVICE BRAKES ON AXLES NO. 1 AND NO. 2 DO NOT RELEASE (CONT).
3.
Does service relay valve No. 1
operate correctly?
Replace service
relay valve No. 1
(Para 12-13).
Verify repair, go to
Step 6 of this Fault.
YES
NO
Brakes on Axles No. 1 and
No. 2 fail to release.
Air lines OK.
Service relay valve No. 1
faulty.
Air chambers faulty.
Brakes faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Service relay valve No. 1 test.
WARNING
If service relay valve No. 1 fails
closed, brakes will not release.
Read WARNING
on Page 2-1873
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