4-16. BRAKE SYSTEM TROUBLESHOOTING PROCEDURES (CONT).
5. SERVICE BRAKES ON ALL AXLES DO NOT APPLY OR APPLY SLOWLY.
Tools and Special Tools
Tool Kit, General Mechanic's: Automotive
(Item 50, Appendix J)
Pressure Test Kit (Item 34, Appendix J)
Engine OFF, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
Solution, Soap (Item 21, Appendix E)
Wheels chocked, (TM 9-2320-364-10)
Emergency and service air supply gladhand
connected to truck, (Para 2-22)
Trailer air system charged, (Para 2-22)
Soap and water solution will be used to visually check for leaks.
Are air lines 2255, 2260, 2637,
Truck air system OK.
2638, 2639, 2660, fittings, load
sensing valve and quick
REASON FOR QUESTION
release valve free of leaks and
Air lines and fittings faulty.
If air lines or components listed
Load sensing valve faulty.
leak, loss of air pressure will
Quick release valve faulty.
prevent application of service
brakes. Crimped air lines will
also restrict air flow to brake
Tighten loose fittings,
repair or replace air
lines, and/or replace
4-47. Verify repair, go
to Step 4 of this Fault.