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Page Title:
TRAILER BRAKES GRAB WHEN APPLIED. (Cont) |
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 TM 9-2330-385-14
10. TRAILER BRAKES GRAB WHEN APPLIED (CONT).
2.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Truck air system OK.
Pressure test.
on Page 4-311
Load sensing valve OK.
REASON FOR QUESTION
POSSIBLE PROBLEMS
Does brake relay valve supply
If relay valve applies too much
Relay valve faulty.
pressure, trailer service brakes
60 5 psi (414 34 kPa) to
Brake drums faulty.
will grab.
brake chambers?
Brake components faulty.
Replace relay valve
NO
Verify repair, go to
Step 5 of this Fault.
YES
4-310
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