CAUTIONS WHEN OPERATING BOOM
• Be as slow as possible when operating the boom operation lever.
Especially avoid sudden lever operations when the load is hoisted,
which may cause the load to swing 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.
• Attempts to pull the load laterally or pull to bring forth the load by
raising/lowering and/or extracting/retracting operation of the boom
are prohibited. Do not attempt under any circumstance.
• Be aware of the hook block windup condition and exercise caution
when extending or retracting the boom.
• When the boom is extended, the working radius increases, and the
rated total load that can be hoisted decreases. When working with
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 SWING OPERATION
• Check the safety in the vicinity and blow the horn before swinging.
• Be as slow as possible when operating the swing lever. Make sure
to start smoothly, swing slow, and stop gently.
Especially avoid sudden lever operations when the load is hoisted,
which may cause the load to swing and cause the Machine to lose
balance, and thus may damage the crane or tip the Machine.
• Attempts to pull to bring forth the load or let the load stand up by
swinging operation are prohibited. Do not attempt under any
circumstance.
• 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 when swinging.
If caught by an obstacle, do not forcibly wind up the hoist load, but
untangle the caught part before winding up.
COOPERATION HOISTING IS PROHIBITED AS THE RULE
Tandem hoisting, that is to use more than one crane to hoist a load, is prohibited.
Tandem hoisting work is a highly hazardous work that may cause for instance a tip of the Machine due
to uneven center of gravity, fall of the hoisted load or boom damage.
If the need to work so exists for unavoidable reason, establish a work scheme by responsibility of the
user, discuss fully, let the worker fully acknowledge the work method and procedures, then work
carefully under the direct leadership of the work supervisor.
And, observe the following cautions as well.
• Use the cranes of same model.
• Choose the Machine model that can handle sufficiently larger load than the load to be hoisted.
• Make sure only one person gives signs.
• Limit the crane operations to single operations as the rule, and do not attempt any swing operation.
• Appoint one responsible slinger who is most experienced.
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