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TM 9-2320-364-20-3
2-2324
7. LOSS OF HOOK ARM SAFE LOWERING FUNCTION.
INITIAL SETUP
1.
Are 22 to 28 vdc measured at
main junction box terminal 10
with ENGINE switch ON and
hook arm safe lowering
button pushed in?
Go to Step 5 of this
Fault.
START
NO
Hook arm operates in manual
mode.
Middle frame operates in
manual mode.
Wire 1470 faulty.
Wire 1475 faulty.
Wire 1435 faulty.
Hook arm safe lowering button
faulty.
Wire 1479 faulty.
Wire 1477 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Voltage test.
STE/ICE-R #89.
If 22 to 28 vdc are not present,
component supplying voltage
to terminal 10 is faulty.
2-28. LOAD HANDLING SYSTEM (LHS) TROUBLESHOOTING (CONT).
Tools and Special Tools
Tool Kit, General Mechanic’s: Automotive
(Item 74, Appendix G)
STE/ICE-R (optional) (Item 3, Appendix G)
Multimeter (Item 44, Appendix G)
Jumperwire
Equipment Condition
Engine OFF, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
Wheels chocked, (TM 9-2320-364-10)
References
TM 9-2320-364-10
TM 9-4910-571-12&P
WARNING
Materials/Parts
Wooden blocks (2) (Appendix D)
Lockwasher (4) (Item 180, Appendix F)
YES
Read WARNING
on Page 2-2325
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