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TM 9-2330-385-14
4-16. BRAKE SYSTEM TROUBLESHOOTING PROCEDURES (CONT).
10. TRAILER BRAKES GRAB WHEN APPLIED.
INITIAL SETUP
Tools and Special Tools
References
Tool Kit, General Mechanic's: Automotive
TM 9-2320-364-10
(Item 50, Appendix J)
Equipment Condition
Pressure Test Kit (Item 34, Appendix J)
Engine OFF, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
Personnel Required
Wheels chocked, (TM 9-2320-364-10)
Two
Emergency and service air supply gladhand
connected to truck, (Para 2-22)
START
1.
TEST OPTIONS
KNOWN INFO
WARNING
Read WARNING
Pressure test.
Truck air system OK.
REASON FOR QUESTION
POSSIBLE PROBLEMS
Is load sensing valve
If load sensing valve is
Load sensing valve faulty.
misadjusted or fails opened,
adjusted correctly and sup-
Relay valve faulty.
extra air pressure will cause
plying 60 5 psi
Brake drums faulty.
brakes to lockup.
(414 34 kPa)?
Brake components faulty.
Adjust or replace load
sensing valve
NO
Verify repair, go to
Step 5 of this Fault.
YES

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