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TM 9-2320-364-20-2
2-1838
12. SERVICE BRAKES ON AXLES NO. 4 AND 5 DO NOT APPLY.
INITIAL SETUP
1.
Do all brakes on both Axles
fail to operate?
Go to Step 4 of this
Fault.
START
YES
NO
Brakes on Axle No. 3 operate
correctly.
Brakes on Axles No. 4 and No. 5
do not apply correctly.
Air lines crimped or leaking
and/or fittings, valves or
air chambers leaking.
Service relay valve No. 3
faulty.
Air chambers faulty.
Brakes faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Operation test.
If only one set of brakes on
Axles No. 4 and No. 5 fail to
apply, problem is in the air
chamber or brake components.
2-24. BRAKES SYSTEM TROUBLESHOOTING (CONT).
Tools and Special Tools
Tool Kit, General Mechanic’s: Automotive
(Item 74, Appendix G)
Pressure Test Kit (Item 50, Appendix G)
Equipment Condition
Engine OFF, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
Wheels chocked, (TM 9-2320-364-10)
References
TM 9-2320-364-10
WARNING
Personnel Required
Two
NOTE
The following troubleshooting procedures cover one set of brakes for Axles No. 4 and 5, but they
apply to all four sets of brakes.
Read WARNING
on Page 2-1839
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