4-16. BRAKE SYSTEM TROUBLESHOOTING PROCEDURES (CONT).
6. SERVICE BRAKE(S) ON ONE AXLE 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)
Pin, Cotter (Item 62, Appendix I)
Emergency and service air supply gladhand
Pin, Cotter (Item 63, Appendix I)
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.
Visual and audible inspection.
Truck air system OK.
Are air lines, fittings, relay
valve and brake chamber(s)
REASON FOR QUESTION
free of leaks and/or crimps?
If air hose or listed components
Air lines and fittings faulty.
are leaking, service brakes will
Relay valve faulty.
not apply because of loss of air
Multifunction valve faulty.
pressure. Crimped air lines will
Brake chamber(s) faulty.
also restrict air flow to brake
Slack adjuster(s) faulty.
Brake chambers faulty.
Tighten loose fittings,
repair or replace air
lines and/or replace
4-47). Verify repair,
go to Step 6 of this