Maeda MC815C, Operation Manual, Page: 49 / 426

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4.3 DURING CRANE WORK
INSPECTION BEFORE STARTING WORK
Check that the safety devices and crane operate properly.
• Operate each of the operation levers 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 moment limiter, outrigger safety device, hook
over-hoist detector and automatic stop device work properly.
CAUTIONS WHEN HANDLING MONITOR
• Use/store the monitor under the following ranges of ambient temperature.
Operating temperature: -10 to 55
°
C Storage temperature: -20 to 60
°
C
• Avoid direct sunlight so that the temperature of the monitor body does not exceed the above
range.
• Avoid locations with strong acid or alkaline atmosphere. Otherwise, unexpected failures may
occur.
• Do not apply impact to the monitor 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 button of the monitor body by a force more than necessary or push with sharp
object such as a tip of a screwdriver. Such attempt may damage the button and may result in
failures and improper operations.
• Do not disassemble the monitor body. Such attempt may result in failures and improper
operations.
CAUTIONS WHEN SETTING MOMENT LIMITER
• In the moment limiter, the moment is calculated on the assumption that the machine is placed
horizontally.
If crane work is performed without the machine being placed horizontally, no forecast or
warning is issued even when the rated total load is approached.
Be sure to set the outriggers horizontally while checking the level.
• When using the crane, check that the boom angle and length and actual load indicated by the
moment limiter are properly displayed in accordance with the crane movement. If the crane is
used with no correct indication given, correct measurement results cannot be obtained,
causing a serious injury or death due to malfunction or damage to the peripheral equipment.
• When using the crane, be sure to check that the setting of number of falls of wire of the
moment limiter matches the number of falls of wire of the crane. If the number of falls of wire
does not match, be sure to change either the setting of number of falls of wire of the moment
limiter or the number of falls of wire of the crane, to make both match with each other. If the
crane is used with the number of falls of wire left unmatched, correct measurement results
cannot be obtained, causing a serious injury or death due to malfunction or damage to the
peripheral equipment.
• Do not change the setting carelessly during measurement with the moment limiter.
Otherwise, correct measurement results cannot be obtained, causing a serious injury or
death due to malfunction or damage to the peripheral equipment.