Maeda CC1485S-1, Operation Manuals

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3.19 BOOM TELESCOPING OPERATION
• Perform the left 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 a large impact to the Machine, and thus may damage the crane
or tip the Machine.
• Pulling of the load laterally by extending/retracting the boom is prohibited. Be sure to
perform the hook hoisting operation to lift a load.
• When the boom is extended, the working radius increases, and the rated total load that
can be hoisted decreases. When working while extending/retracting the boom, pay extra
attention so that the mass (weight) of the load at the time the boom is most extended does
not cause overloading.
• When the boom is extended, the hook block is raised.
If the warning buzzer of the overwinding detector sounds during the boom extending
operation, return the boom telescoping lever immediately to the neutral position and stop
the boom extending operation.
CAUTION
• When the boom is extended/ retracted, the hook block
is in a raised or lowered state. Always perform the
winch operation simultaneously to adjust the hook
block height.
• When the boom is extended for a long time, the boom
slightly retracts due to the temperature change in the
hydraulic oil. In this case, extend the boom as needed.
Operate the left work equipment operation lever (1) as follows.
• Extend: Push the lever forward.
• Neutral: Release your hand from the lever.
The lever returns to the neutral position and the
boom extension/retraction stops.
• Retract: Pull the lever toward you.
NOTES
• Adjust the boom extending/retracting speed by the stroke
of the left work equipment operation lever (1) and
depression amount of the accelerator pedal (2).
• When the boom extends, the second stage extends first,
then the third stage and finally the fourth and fifth stages
extend simultaneously.
When the boom retracts, it retracts in the reverse order of
extension.