Maeda CC423S-1, Operation Manual

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2.3.2 FUNCTIONS OF MOMENT LIMITER
• Do not remove, disassemble, or repair the detector. In addition, do not reposition the detector
from the original location to another.
• When an object hits the detector or damage is found on it, be sure to check the operating
condition of the automatic stop. If an abnormality occurs during automatic stop operation
due to a failed detector, be sure to repair it.
•
The slewing operation does not stop automatically when the crane is overloaded. When
overloaded, do not perform slewing operation.
• When the boom is approaching the stop position while in operation, be sure to lower the
operation speed of the boom.
Operating the boom at high speeds may result in a serious accident, such as death or serious
injury. The boom may fail to stop at the predetermined position, causing the machine to
overturn.
•
The override switch has the function of disabling the
moment limiter function. While this switch is at the
“ON” (cancel) position, the crane does not
automatically stop by the moment limiter, falling into
very dangerous conditions. Any crane operation in
such conditions will result in dropping of hoisted load,
breakage of crane boom, and/or machine tipping, and
may cause a serious accident resulting in death or
serious injury. Use this switch only when the moment
limiter fails or a load test of the crane is conducted.
Key for the switch must be detached during normal
operations.
The moment limiter is a safety device for preventing accidents arising from overload, such as dropping
hoisted loads, damaging the boom or overturning the machine.
Before starting crane operations, be sure to inspect operation of the moment limiter to make sure that
there is no abnormality.