Maeda CC423S-1, Operation Manual

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3.14 BOOM DERRICKING OPERATION
• Perform the right work equipment operation lever operation as slowly as possible.
Especially avoid sudden lever operations when the load is hoisted, which may cause the load
to waggle and give large impact to the Machine, and thus may damage the crane or trip the
Machine.
• Pulling-in and raising work of a load by derricking the boom is prohibited. Be sure to perform
the hook hoisting operation to lift a load.
• When the boom is lowered, the working radius increases, and the rated total load that can be
hoisted decreases. When operating the machine by derricking the boom, exercise caution so
that the mass (weight) of the suspended load is not overloaded when the boom reaches the
lowest position.
Operate the right work equipment operation lever (3) as
follows.
• Lowering: Push the lever outside (right side).
• Neutral:
Release your hand from the lever.
The lever returns to the neutral position and
the boom derricking stops.
• Raising: Pull the lever inside (left side).
NOTES
• Adjust the boom derricking speed by the stroke of the
right work equipment operation lever (3) and depression
amount of the accelerator pedal (4).
• When the boom length displayed on the moment limiter
display is “3.3 m” or longer, the boom lowering action
stops automatically so that the boom angle does not fall
below a horizontal line.