5.4 CRANE OPERATION M A E D A Crawler Crane
5-32 5/2020 CC1908S-1
[MIRROR FOR CHECKING WINCH DRUM
IRREGULAR WINDING]
IMPORTANT
An irregular winding check mirror (1) is
installed on the lower part of the winch drum
to enable irregular winding of the wire rope
on the winch drum to be checked easily from
the operator's seat.
When hoisting the wire rope, check carefully
that wire rope is not wound irregularly.
BOOM DERRICKING
OPERATION
WARNING
• Operate the right-hand control lever as
slowly as possible.
Especially avoid sudden lever operations
when a load is hoisted, which may cause
the load to sway and hit the machine,
damaging the crane or causing the machine
to topple.
• Drawing in a load or standing it upright by
derricking is prohibited. Be sure to use
hook hoisting to lift loads.
• Lowering the boom increases the working
radius and reduces the rated total load that
can be hoisted. When derricking the boom,
pay extra attention so that the weight of the
load at the lowermost boom position does
not cause overloading.
Operate the right-hand control lever (1) as
follows:
• Lowering: Push the lever outside (right side).
• Neutral: Release your hand from the lever.
The lever returns to the neutral
position and boom derricking stops.
• Raising: Pull the lever inside (left side).
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