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Page Title:
LOSS OF HOOK ARM SAFE LOWERING. |
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 TM 9-2320-364-34-1
2-14. LOAD HANDLING SYSTEM (LHS) TROUBLESHOOTING (CONT).
1. LOSS OF HOOK ARM SAFE LOWERING.
INITIAL SETUP
Tools and Special Tools
Personnel Required
Tool Kit, General Mechanic's
Two
(Item 240, Appendix F)
References
Jackstand (2) (Item 132, Appendix F)
TM 9-2320-364-10
Wooden Block (2) (Appendix C)
Steel Tube (Appendix C)
Equipment Condition
Load (500 lb [227 kg] minimum)
Engine OFF, (TM 9-2320-364-10)
Materials/Parts
Parking brake applied, (TM 9-2320-364-10)
Sealing Compound (Item 62, Appendix B)
Wheels chocked, (TM 9-2320-364-10)
Lockwasher (4) (Item 266, Appendix E)
Packing, Preformed (4) (Item 393, Appendix E)
START
1.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Operation test.
Unit Troubleshooting tasks
on Page 2-251
completed.
REASON FOR QUESTION
Hook arm operates using
normal controls.
If the hook arm will safe lower in
Does loaded hook arm safe
the direction of unloading, the
lower in the direction of
POSSIBLE PROBLEMS
two safe lowering solenoid
unloading?
valves (one per hook arm
Safe lowering solenoid valve
manifold) on same side of the
faulty.
manifold as port VB are
suspect, the remaining two safe
lowering solenoid valves are
OK.
Go to Step 5 of this
NO
Fault.
YES
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