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TM 9-2320-364-20-4
2-3164
4. CHU MODE SWITCH INOPERATIVE (LIFTING FRAME CONTACTS REAR
ROLLERS).
INITIAL SETUP
1.
START
YES
NO
CHU jumper wire harness OK.
Mode switch out of
adjustment.
Mode switch faulty.
CHU wire harness faulty.
CHU control box faulty.
Wire 1495 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
2-38. CHU TROUBLESHOOTING (CONT)
Tools and Special Tools
Tool Kit, General Mechanic’s: Automotive
(Item 74, Appendix G)
Multimeter (Item 44, Appendix G)
Equipment Condition
Engine OFF, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
Wheels chocked, (TM 9-2320-364-10)
Is mode switch properly
adjusted?
Adjust mode switch
(Para 21-25). Verify
repair, go to Step 6 of
this Fault.
Visual inspection.
Mode switch activates transit
lock interlock circuit and
switches LHS system to use
hook arm up proximity switch
for the CHU. Faults in this cir-
cuit will cause interlock function
not to operate and hook arm
cylinders to extend too far.
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