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 TM 9-2320-364-34-1
3. HOOK ARM DOES NOT LOAD (CONT).
2.
KNOWN INFO
TEST OPTIONS
Unit Troubleshooting tasks
Operation test.
Does hook arm load with
completed.
hook arm safe lowering
Hook arm unloads.
REASON FOR QUESTION
button pushed in?
DC valve OK.
If load control valve on port VB
side of LH or RH hook arm
POSSIBLE PROBLEMS
manifold is faulty, fluid cannot
exit cylinder while loading. If
Load control valve faulty.
load control valve on port VA
LH hook arm cylinder faulty.
side of LH or RH hook arm
RH hook arm cylinder faulty.
manifold is faulty, fluid cannot
enter cylinder while loading.
Pushing in safe lowering button
bypasses the four load control
valves.
Go to Step 6 of this
NO
Fault.
YES
2-272
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