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 TM 9-2330-385-14
4-15. AIR SYSTEM TROUBLESHOOTING PROCEDURES (CONT).
5. DRAWBAR WILL NOT LOWER.
INITIAL SETUP
Tools and Special Tools
References
Tool Kit, General Mechanic's: Automotive
TM 9-2320-364-10
(Item 50, Appendix J)
Equipment Condition
Engine OFF, (TM 9-2320-364-10)
Personnel Required
Parking brake applied, (TM 9-2320-364-10)
Two
Wheels chocked, (TM 9-2320-364-10)
Charging hose connected to trailer
quick disconnect and truck, (Para 2-9 or 2-11)
Trailer air system charged, (Para 2-22)
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 lower.
Air bag control valve faulty.
Check valve and breather faulty.
NO
Notify supervisor.
YES
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