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1.7 OVER HOIST DETECTOR
CAUTION
Pay attention to the distance between the hook block and the boom when raising the hook
block.
The hook block also raises when the boom is extended.
Always check the height of the hook block when performing the boom extending operation.
(1) Hook block
(2) Over hoist detector
(3) Weight
(4) Boom
When the hook block (1) was raised or the boom (4) was extended, the over hoist detector intermittently
activates the buzzer to warn the operator of overwinding if the hook block (1) approached the end of the
boom (4) and pushed up the weight (3).
At the same time, the raising of the hook block (1) and the extension of the boom (4) stop automatically.
When a warning buzzer sounds, operate the winch lever immediately to the “LOWER” side or operate the
boom telescoping lever to the “RETRACT” side to lower the hook block (1).
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