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3.13 HOISTING AND LOWERING
• With the boom deflection, the hoisted load slightly shifts forward. Notify the workers around
such as slinging operators.
• If the hook block is over-hoisted, the over-hoisting prevention device detects over-hoisting
and the warning buzzer sounds intermittently. When the buzzer sounds, immediately operate
the right work equipment operation lever to the neutral position to stop the hoisting
operation.
• When it is necessary to unwind a significant length of the wire rope to lower the hook in
works such as underground works, at least 3 turns of the wire rope must be left on the winch
drum.
CAUTION
• Be careful not to lower the hook block excessively
so that the hook block does not fall sideways on the
ground. Doing so results in irregular winding of the
winch drum.
• When stopping the winch operation, do not
suddenly return the lever to the neutral position.
Doing so may loosen the wire rope, resulting in
irregular winding of the winch drum.
3.13.1 NORMAL HOISTING AND LOWERING
Operate the right work equipment operation lever (3) as
follows.
• Lowering: Push the lever forward.
• Neutral:
Release your hand from the lever.
The lever will return to the neutral position and
the raising/lowering of the hook block stops.
• Hoisting: Pull the lever toward you.
NOTES
Adjust the winch raising and lowering speed by the stroke
of the right work equipment operation lever (3) and the
depression amount of the accelerator pedal (4).
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