CAUTIONS WHEN HANDLING MOMENT LIMITER
• Use/store the moment limiter under the following ranges of ambient temperature.
Temperature of use: -10 to 50 degrees C Storage temperature: -30 to 70 °C
• Avoid direct sunlight so that the temperature of the moment limiter body does not exceed the above
range.
• Avoid locations with strong acid or alkaline atmosphere as much as possible. Otherwise, unexpected
failures may occur.
• Do not apply impact to the moment limiter body for instance by colliding with an object.
Such attempt may damage the case and may result in failures and improper operations.
• Do not push the panel sheet of the moment limiter body by a force more than necessary or push with
sharp object such as a tip of a screwdriver. Such act may damage the panel sheet and may result in
failures and improper operations.
• Do not remove the case cover or panel sheet from, or disassemble the moment limiter body. Such act
may damage case and/or panel sheet and may result in failures and improper operations.
CAUTIONS WHEN SETTING UP MOMENT LIMITER
• The moment limiter calculates the moments assuming the Machine is level.
If you work with the crane when the Machine is not level, warnings and alarms are not issued even
when the rated total load is near. Always use the level to ensure that the machine is not at an angle.
• Before using the moment limiter, check that the boom angle display, boom length display and real load
display are displayed correctly following the crane movements. Attempt to use without correct display
results in failure to obtain correct measurement result and may result in serious bodily accidents
caused by reasons such as a tipping over and/or breakage of the machine.
• Always make sure the fall mode setting of the moment limiter matches with the wire fall of the crane.
Attempt to use unmatched wire falls may results in failure to obtain correct measurement and may
result in serious accidents caused by reasons such as a breakage of wire rope.
• Do not carelessly change the setting when measuring with the moment limiter. Such attempt results in
failure to obtain correct measurement result and may result in serious bodily accidents caused by
reasons such as a tipping over and/or breakage of the machine.
• Check the following before hoisting a load.
Attempt to hoist the load without checking may result in serious bodily accidents by a drop of the load
or tipping of the crane.
• Observe the values in the rated total load chart.
• Hoist from the center of gravity of the load.
• Check that the wire ropes of the hook block are perpendicular to the ground.
• When the load leaves the ground, stop winding up the load once and check whether the load is
stable.
• Before hoisting a load, always check whether the sling wire rope "retainer device" of the hook block is
hanging securely If not the wire rope may leave the hook block and cause the load to fall and results in
a serious accident.
• Larger sling rope angle when hoisting the load increases force to the sling rope even when the load
weight is unchanged, thus may cause the sling rope to snap off. Be careful when slinging in order to
prevent excessive force to the sling rope.
• Do not hoist more than 1 load at a time.
This could cause the hoist bracket to hit and damage the other hoisted load, the loads may move and
loose balance and cause tipping, or some other cause of a serious accident.
Do not hoist more than one load even if the total is within the rated total load.
• Hoisting of lengthy load may cause the load to lose balance and is dangerous.
In case of lengthy such load, hoist vertically by using a cramp, or achieve balance of the hoisted load
by applying a rope to both ends of the load.
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