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ONE OR BOTH FLATRACK LOCKING MECHANISM LATCHES WILL NOT UNLOCK OR REMAIN UNLOCKED. (Cont) -725550515
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TM-9-2330-385-14 Palletized Load System Trailer (PLST) Model M1076 Manual
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DRAWBAR WILL NOT RAISE OR REMAIN RAISED. (Cont) -725550517
TM 9-2330-385-14
4-15. AIR SYSTEM TROUBLESHOOTING PROCEDURES (CONT).
4. DRAWBAR WILL NOT RAISE OR REMAIN RAISED.
INITIAL SETUP
Tools and Special Tools
References
Tool Kit, General Mechanic's: Automotive
TM 9-2320-364-10
(Item 50, Appendix J)
Equipment Condition
Pressure Test Kit (Item 34, Appendix J)
Engine OFF, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
Materials/Parts
Wheels chocked, (TM 9-2320-364-10)
Solution, Soap (Item 21, Appendix E)
Charging hose connected to trailer
quick disconnect and truck, (Para 2-9)
Personnel Required
Trailer air system charged, (Para 2-22)
Two
NOTE
Soap and water solution will be used to visually check for leaks.
There are two models of drawbar assist control valves. Model B replaced Model A.
Model A has air lines on top of valve and uses elbow and reducer fittings.
Model B has air lines on back of valve and uses straight adapter fittings.
START
1.
KNOWN INFO
TEST OPTIONS
Visual inspection.
Truck air system OK.
Is drawbar free of damage or
binding?
POSSIBLE PROBLEMS
REASON FOR QUESTION
Drawbar frame faulty.
If drawbar binds or is damaged,
Air lines and fittings faulty.
drawbar will not raise.
Quick disconnect check
valve faulty.
Air reservoir 1 check
valve faulty.
Air bag control valve faulty.
Inversion valve faulty.
Safety valve faulty.
Notify DS
NO
Maintenance.
YES

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