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8.3.3 HOOK RAISING AND LOWERING
• In the event of “Over-hoist alarming” or “Automatic cut out” during the hook raising operation,
immediately suspend winding. Otherwise, it may cause a damege to the Crane, or the
wire-rope is broken which result dropping of the hook or laod; a serious accident may happen.
• Continuing the hook lowering in the condition that the load already reached the ground, the
random wind of the wire-rope will happen. This may damege the wire rope or shorten its life
badly. Further, there is some risk that the wire-rope may bite itself which prevents any more
winching. During the hook lowering, always take good care not to cause such random wind.
• The hook is raised or lowered by the boom telescoping or derricking, as well.
The same attention must be paid as the hook raising and lowering by the winch operation.
[1] HOOK RAISING
Push the Hook raising and lowering/No.2 outrigger operation lever
to “Raise (upper)”, then pull the Accelerator lever slowly.
The hook starts to be raised.
[2] HOOK LOWERING
Push the Hook raising and lowering/No.2 outrigger operation lever
to “Lower (lower)”, then pull the Accelerator lever slowly.
The hook starts to be lowered.
[3] STOP RAISING OR LOWERING
Release the Accelerator lever slowly, then release Hook raising
and lowering/No.2 outrigger operation lever to return it to the
neutral position.
The hook stops raising or lowering.
8.3.4 BOOM DERRICKING
[1] BOOM RAISING
Push the Boom derricking/No.4 outrigger operation lever to “Raise
(upper)”, then pull the Accelerator lever slowly.
The boom is raised.
[2] BOOM LOWERING
Push the Boom derricking/No.4 outrigger operation lever to “Lower
(lower)”, then pull the Accelerator lever slowly.
The boom is lowered.
[3] STOP BOOM DERRICKING
Release the Accelerator lever slowly, then release the Boom
derricking/No.4 outrigger operation lever to return it to the neutral
position.
The boom stops derricking.
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