Maeda MK0003, Руководство по обслуживанию, Страница: 340 / 348

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1.4 OVER LOWERING DETECTON DEVICE
[1] OPERATION OF OVER LOWERING PROTECTIVE DEVICE
• When the hook is lowered and an amount of wire rope in the winch drum
becomes small, the dead turns lamp is displayed on the monitor.
• When hook lowering operation is performed, the alarm issues a
continuous sound “peep”.
• The hook lowering action is automatically stopped.
[2] INSPECTION OF EXCESSIVE UNWIND DETECTOR
When the hook is lowered and 3 loops or less of wire rope is left in the
winch drum, check if the alarm sounds “peep” continuously and hook
lowering action stops automatically.
If lowering operation does not stop automatically, the excessive unwind
detector may be faulty or the circuit may be open.
Check the detection roller (2) of the over lowering prevention for
deformation and abnormality.
1.5 IRREGULAR WINDING PREVENTION ROLLER
Check the irregular winding prevention roller (1) for deformation and
abnormality.