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 TM 9-2320-364-34-1
2-14. LOAD HANDLING SYSTEM (LHS) TROUBLESHOOTING (CONT).
4. HOOK ARM DOES NOT UNLOAD.
INITIAL SETUP
Tools and Special Tools
References
Tool Kit, General Mechanic's
TM 9-2320-364-10
(Item 240, Appendix F)
Equipment Condition
Pressure Test Kit (Item 165, Appendix F)
Engine OFF, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
Materials/Parts
Sealing Compound (Item 62, Appendix B)
Wheels chocked, (TM 9-2320-364-10)
Lockwasher (4) (Item 266, Appendix E)
Personnel Required
Two
START
1.
KNOWN INFO
TEST OPTIONS
Unit Troubleshooting tasks
Operation test.
Does hook arm unload using
completed.
DC valve manual push
Hook arm loads.
REASON FOR QUESTION
button?
If DC valve solenoid is faulty,
POSSIBLE PROBLEMS
DC valve will operate hook arm
when manual push button is
Directional control (DC) valve
pushed in but not when it is
faulty.
electrically activated by cab
Load control valve faulty.
controls.
LH hook arm cylinder faulty.
RH hook arm cylinder faulty.
Go to Step 2 of
NO
this Fault.
YES
Replace directional
control valve
(Para 17-10).
Verify repair, go to
Step 8 of this Fault.
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