4-15. AIR SYSTEM TROUBLESHOOTING PROCEDURES (CONT).
3. ONE OR BOTH FLATRACK LOCKING MECHANISM LATCHES WILL NOT UNLOCK
OR REMAIN UNLOCKED.
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)
Wheels chocked, (TM 9-2320-364-10)
Solution, Soap (Item 21, Appendix E)
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 2078, 2080, 2081,
fittings, pressure holdback
valve, flatrack locking valve
REASON FOR QUESTION
and air chambers free of
If lines and/or components leak,
Air lines and fittings faulty.
locking mechanism latches will
Pressure holdback valve faulty.
Flatrack locking valve faulty.
Air chamber(s) faulty.
Tighten loose fittings,
repair or replace air
lines and/or fittings
Verify repair, go to
Step 6 of this Fault.