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Page Title:
SERVICE BRAKE(S) ON ONE AXLE DOES NOT RELEASE OR DOES NOT RELEASE CORRECTLY. (Cont) |
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 TM 9-2330-385-14
7. SERVICE BRAKE(S) ON ONE AXLE DOES NOT RELEASE OR DOES NOT RELEASE
CORRECTLY (CONT).
2.
TEST OPTIONS
KNOWN INFO
Truck air system OK.
Does brake relay valve
Relay valve operation test.
Air lines and fittings OK.
exhaust air when brake pedal
REASON FOR QUESTION
is released?
POSSIBLE PROBLEMS
correctly, service brake air
Relay valve faulty.
chambers will not release or
Brake chamber(s) faulty.
release correctly.
Slack adjuster(s) faulty.
Brake components faulty.
Replace relay valve
NO
Verify repair, go to
Step 6 of this Fault.
YES
3.
KNOWN INFO
TEST OPTIONS
Truck air system OK.
Brake chamber operation test.
Do brake chamber rods
Air lines and fittings OK.
retract when brake pedal is
Relay valve OK.
REASON FOR QUESTION
released?
POSSIBLE PROBLEMS
If service brake chambers are
faulty, brakes will not release or
Brake chamber(s) faulty.
release correctly.
Slack adjuster(s) faulty.
Brake components faulty.
Replace brake
chambers
NO
Verify repair, go to
Step 6 of this Fault.
YES
4-288
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