Unless these precautions before work are observed, serious physical injury may be caused.
• Be sure to select a level place and stop the machine there
before performing work.
After stopping the machine, check the level with a spirit
level.
In the moment limiter, the moment is calculated on the
assumption that the machine is placed horizontally. If
work is performed without the machine being placed
horizontally, no forecast or warning is issued even when
the dangerous range is approached.
• Precisely set the moment limiter in line with the crane
work. The moment limiter calculates the moment based
on the set switch. If settings are different from actual
work, the wire rope may be cut or the boom may be
damaged, leading to serious physical injury.
Example of erroneous settings:
• Number of wire rope falls in actual work: Two falls
• Number of wire rope falls in set switch: Four falls
If the setting is made as shown above, the moment limiter
Therefore, even if overload is approached, the moment
limiter issues no forecast or warning.
As a result, the wire rope is in danger of being cut when
the actual gross total load exceeds the range of "two falls".
• When the hook block is overhoisted, the overwinding
prevention device is activated, the warning buzzer sounds
and the operation stops.
When the warning buzzer sounds, release your hand
immediately from the right work equipment operation lever
and place it at the neutral position to stop raising the hook.
After that, operate the right work equipment operation lever
to the "Lower" side (push forward) and lower the hook block.
To Next Page
