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TM 9-2320-364-20-3
2-2338
Repair wire 1477
(see schematic
Fig 2-52) or notify
DS Maintenance.
Verify repair, go to
Step 9 of this Fault.
7. LOSS OF HOOK ARM SAFE LOWERING FUNCTION (CONT).
Hook arm operates in manual
mode.
Middle frame operates in
manual mode.
Wire 1470 OK.
Wire 1475 OK.
Wire 1435 OK.
Hook arm safe lowering button
OK.
Wire 1479 OK.
Wire 1477 OK.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Verify repair.
If hook arm safe lowering
operates, fault is corrected.
YES
NO
Fault not corrected.
Notify DS
Maintenance.
9.
Does hook arm safe lowering
operate?
Fault corrected.
8.
YES
NO
Hook arm operates in manual
mode.
Middle frame operates in
manual mode.
Wire 1470 OK.
Wire 1475 OK.
Wire 1435 OK.
Hook arm safe lowering button
OK.
Wire 1479 OK.
Wire 1477 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #91.
If wire 1477 is faulty, 22 to 28
vdc will not be present at safe
lowering valves.
Is continuity measured on
wire 1477 at hook arm safe
lowering button and main
junction box terminal 10?
WARNING
Read WARNING
on Page 2-2339
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