Maeda MC815C, Operation Manual, Page: 58 / 426

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CAUTIONS WHEN OPERATING BOOM
• Perform operation lever operation slowly.
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.
• When the boom is lowered, the working radius increases,
and the rated total load that can be hoisted decreases.
When working while raising/lowering the boom, pay extra
attention so that the mass (weight) of the load at the time the
boom is most lowered does not cause overloading.
• Pulling of the load laterally by raising/lowering, and/or
extracting/retracting the boom is prohibited. Do not attempt
to do the above under any circumstances.
• When extending/retracting the boom, check raising of the
winch and take sufficient care.
• 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 lowered does not cause overloading.
CAUTIONS DURING SLEWING OPERATION
• Check the safety in the vicinity and honk the horn before
slewing.
• If the boom derrick angle is small, be careful to prevent the
boom from hitting the operator or the Machine.
• Perform operation lever operation slowly. Make sure to start
smoothly, slew at low speed, and stop quietly.
Especially avoid sudden lever operations when the load is
hoisted, which may cause the load to waggle and cause the
Machine to lose balance, and thus may damage the crane or
trip the Machine.
• Attempts to pull the load towards the machine or let the load
stand up by slewing operation are strictly prohibited. Do not
attempt to do the above under any circumstances.
• Be careful to prevent the wire rope and/or hoisted load from
contacting an obstacle such as a tree or steel when hoisting
a load or slewing.
If caught by an obstacle, do not forcibly wind up the hoist
load, but untangle the caught part before winding up.
• Certain outrigger extension condition may cause the boom
to hit an outrigger during slewing operation and cause the
crane to be damaged or the Machine to trip.
Be careful to prevent the boom from hitting outriggers during
slew operation.