4-15. AIR SYSTEM TROUBLESHOOTING PROCEDURES (CONT).
1. TRAILER AIR SYSTEM WILL NOT CHARGE OR MAINTAIN A CHARGE.
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)
Flatrack removed from trailer,
Soap and water solution will be used to visually check for leaks.
Truck air system OK.
Are air lines 2254, 2223, 2620,
2605, 2424, 2228,
2548, 2019, 2606, and 2014,
REASON FOR QUESTION
fittings, parking brake valve,
Air lines and fittings faulty.
If air lines and fittings, valves,
multifunction valve, air bag
Parking brake valve faulty.
air reservoirs and/or brake
control valve, inversion valve
Multifunction valve faulty.
chambers leak, loss of air
and/or air reservoirs free
pressure will prevent trailer air
system from charging correctly.
Repair or replace air
lines and fittings
and/or replace leaking
Verify repair, go to
Step 4 of this Fault.