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TM 9-2320-364-20-2
2-1778
Both brakes on Axle No. 3 fail to
apply correctly.
Air lines crimped.
Relay spring valve No. 1
faulty.
Air chambers faulty.
Brakes faulty.
INITIAL SETUP
1.
Do both sets of parking
brakes on Axle No. 3 fail to
apply?
If only one parking
brake fails to apply,
go to Step 4 of this
Fault.
START
YES
NO
Parking brakes on Axles No. 4
and No. 5 operate correctly.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Operation test.
If only one parking brake fails to
apply, problem is in 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
5. PARKING BRAKES ON AXLE NO. 3 DO NOT APPLY.
NOTE
The following troubleshooting procedures cover one set of brakes for Axle No. 3, but they apply to both
sets of brakes.
Personnel Required
Two
Read WARNING
on Page 2-1779
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