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TM 9-2320-364-20-4
2-3140
1. MAIN FRAME DOES NOT UNLOAD.
INITIAL SETUP
1.
Fault is within LHS
system. Go to
Load Handling
System (LHS)
Troubleshooting.
START
YES
NO
None
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Jumper harness test.
Main frame unload solenoid is
powered by wire 1465. If wire
1465 is open where it passes
through control box, the main
frame unload function will not
operate.
2-38. CHU TROUBLESHOOTING (CONT)
Tools and Special Tools
Tool Kit, General Mechanic’s: Automotive
(Item 74, Appendix G)
Equipment Condition
Engine OFF, (TM 9-2320-364-10)
Parking brake ON, (TM 9-2320-364-10)
Wheels chocked, (TM 9-2320-364-10)
Air system charged, (TM 9-2320-364-10)
Load handling system (LHS) fully extended,
(TM 9-2320-364-10)
References
TM 9-2320-364-10
Does main frame unload
properly when hooked
directly to LHS control
box?
Replace CHU control
box wiring
(Para 21-22).
LHS system faulty.
CHU electrical system faulty.
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