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1.6 OVER HOIST DETECTOR
CAUTION
When winding the hook block, be careful of clearance between the hook block and
boom.
Also, the hook block can be wound when the boom is extended.
Perform boom extension operation while always checking the hook block height.
(1) Hook block
(2) Over hoist detector
(3) Weight
(4) Boom
The over winding detector alerts the operator to the occurrence of over winding with an
intermittent buzzer sound, while the hook block (1) is wound or the boom (4) is extended, or
when the weight (3) is pushed upward due to hook block (1) approaching the boom (4).
At the same time, the winding of the hook block (1) and the extension of the boom (4) stop
automatically.
When you hear the alarm buzzer sound, immediately shift the right control lever to the
“UNWIND”position, or shift the left control lever to the “RETRACT” position, in order to unwind
the hook block (1).
NOTES
When this switch is in the “ON” position, the tricolor revolving light illuminates in red.
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