13. SERVICE BRAKES ON AXLES NO. 4 AND NO. 5 DO NOT RELEASE.
Do all brakes on both Axles
fail to operate?
Go to Step 4 of this
Brakes on Axle No. 3 operate
All brakes on Axles No. 4 and
No. 5 do not release correctly.
Air lines crimped.
Service relay valve No. 3
Air chambers faulty.
REASON FOR QUESTION
If only one set of brakes on
Axles No. 4 and No. 5 fail to
release, the 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)
The following troubleshooting procedures cover one set of brakes for Axles No. 4 and 5, but they
apply to all four sets of brakes
on Page 2-1849