Maeda LC383M-5, Руководство по эксплуатации, Страница: 38 / 271

2-16
2.4 PRECAUTIONS WHEN WORKING WITH CRANE
INSPECTION BEFORE STARTING WORK
Check that the safety devices and crane operate properly.
•
Operate each of the operation levers, pedals and switches under no load, and check that operations
take place without abnormality.
Repair immediately if any abnormality exists.
• Check that the safety devices such as the moment limiter, over hoist detector device and three-winding
stop alarm device activate properly.
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 atmosphere surrounding the moment limiter does
not exceed the above range.
• Avoid locations with a strong acid or alkaline atmosphere as much as possible. Otherwise, unexpected
failures may occur.
• Avoid impact to the moment limiter body, for instance colliding with an object.
Doing so may damage the case and result in failures and improper operations.
• Avoid excessive pressure to the panel sheet of the moment limiter body or pushing with a sharp object
such as the tip of a screwdriver. Doing so may damage the panel sheet and could result in failures and
improper operations.
• Do not remove the case cover or panel sheet from, or disassemble the moment limiter body. Doing so
may damage the case and/or panel sheet and could 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. Attempting to use without the correct
display results in failure to obtain the correct measurement and may result in serious bodily accidents
caused by reasons such as tipping over and/or breakage of the machine.
• Always make sure the fall mode setting of the moment limiter matches with the wire rope fall of the
crane. Attempting to use unmatched wire rope falls may results in failure to obtain the correct
measurement and could result in serious accidents caused for instance by a breakage of the wire rope.
• Do not change the setting when measuring with the moment limiter. Doing so could result in failure to
obtain the correct measurement and may result in serious bodily accidents caused by reasons such as
tipping over and/or breakage of the machine.
PRECAUTIONS WHEN DECIDING THE CRANE OPERATION SITE
Always place the machine on the level and solid ground.
Crane operation is dangerous when the machine is placed in an area such as below:
• Temporary asphalt pavements
• Thin concrete pavements
• Stone pavements
• Where the surface looks solid but the soil under it is soft, or the soil below a pavement has been
washed by water and become hollow.
• Soft ground which may collapse, is near a shoulder of a road or an excavated hole.
• Slopes