Maeda CC423S-1, Operation Manual

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3.17 CRANE STOWAGE OPERATION
3.17.1 CRANE STOWAGE OPERATION AT THE TIME OF SIMPLE STOWAGE OF
HOOK BLOCK
• The hook stowage switch is used to cancel the automatic stop function of the over-hoisting
prevention device and reduces hook winding force.
When storing the hook block, carefully (slow speed without full stroke) operate the right work
equipment operation lever and take care not to allow the hook block to crash against the
stowage position at the boom tip.
• Move by storing the hook block in the simple stowage position only when moving inside the
work site halfway the crane operation. When moving a long distance such as when moving to
the work site or going to and from the transportation place, store the hook block in the
normal stowage position in the front of the revolving super structure.
• When stowing the hook, be sure to set the boom angle to 5 degrees or below, or to 70
degrees or above, before performing the stowage operation. Stowing the hook at angles
outside these ranges risks damaging the upper part of the hook block.
• Do not perform hook stowage operation with the maintenance switch in the “ON” position.
Unless hook stowage mode is set, the upper part of the hook block, the boom and wire rope
etc. may be damaged.
CAUTION
• When performing simple stowing of the hook block,
stop the hook block from swaying.
• 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.
• The boom “Retracting” operation will lower the
hook block. The “Lowering” operation of the boom
also causes the hook block to move downward.
Perform the hoisting operation simultaneously so
that the hook block does not fall sideways on the
ground.
1. Operate the left work equipment operation lever (2) to
the “Retract” side (pull toward you) to retract the boom
fully.
NOTES
The hook block lowers with the boom retracting operation.
Perform the hoisting operation as appropriate and hoist
the hook block.
2. Operate the right work equipment operation lever (3)
to “Lower” side (push it outside) to lower the boom until
it stops.
NOTES
The hook block lowers with the boom lowering operation.
Perform the hoisting operation as appropriate and hoist
the hook block.