36
CAUTIONS WHEN OPERATING BOOM
• Perform boom 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.
• 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 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 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.
• Perform the slewing lever operation as slowly as possible. 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.
COOPERATIVE HOISTING IS PROHIBITED AS A GENERAL RULE
Cooperative hoisting, where two or more cranes are used to hoist a single load, is prohibited as a
general rule.
Cooperative hoisting is a highly dangerous operation that may invite tumbling of the machine due to
deviated centre of gravity, fall of hoisted load and damage of the boom.
If cooperation hoisting is required for unavoidable reasons, discuss and establish a work scheme under
the responsibility of the user, let the worker fully acknowledge the work method and procedures, and
only proceed under the direct leadership of the work supervisor.
Also, observe the following cautions:
• 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 1 person gives signals.
• Limit the crane operations to single operations as a rule, and do not attempt any slewing operation.
• Appoint 1 responsible sling operator who is most experienced.
Summary of Contents for CC423S-1
Page 2: ......
Page 8: ...vi This Page Intentionally Left Blank...
Page 22: ...14 This Page Intentionally Left Blank...
Page 56: ...48 SAFETY LABEL LOCATIONS 2 2...
Page 59: ...51 24 Machine Mass 542 4773100 28 Working Radius Rated Total Load Chart 542 3582200...
Page 60: ...52 30 Safe Operation 557 3494500 31 Operating the Moment Limiter 542 2250000...
Page 194: ...186 This Page Intentionally Left Blank...
Page 232: ...224...
Page 248: ...240 This Page Intentionally Left Blank...
Page 251: ...243 2 SPECIFICATION DIMENSIONAL DRAWING...
Page 255: ...247 4 WORKING RADIUS LIFTING HEIGHT 4 Fall Wire Rope...
Page 256: ...248 This Page Intentionally Left Blank...
Page 262: ...254 3 MONITOR INDICATION 1 Searcher hook selector switch 2 Searcher hook position display...
Page 276: ......
Page 277: ......
Page 278: ......