Both brakes on Axle No. 3 fail to
Air lines crimped.
Relay spring valve No. 1
Air chambers faulty.
Do both sets of parking
brakes on Axle No. 3 fail to
If only one parking
brake fails to apply,
go to Step 4 of this
Parking brakes on Axles No. 4
and No. 5 operate correctly.
REASON FOR QUESTION
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 Mechanics: Automotive
(Item 74, Appendix G)
Pressure Test Kit (Item 50 Appendix G)
Engine OFF, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
Wheels chocked, (TM 9-2320-364-10)
5. PARKING BRAKES ON AXLE NO. 3 DO NOT APPLY.
The following troubleshooting procedures cover one set of brakes for Axle No. 3, but they apply to both
sets of brakes.
on Page 2-1779