The moment limiter emergency stop cancel switch will temporarily disable the moment limiter
function. While this switch is turned to ON position (i.e. released), calculation of the rated total
load is stopped, thus the machine is in a very risky condition. When lifting operation is
continued in this condition, it may result in dropping of the hoisted load or damage to the boom,
and cause serious accidents such as overturning of the machine resulting in death or serious
injury.
Use of this switch must be limited to the specific inspection and maintenance purpose, where
each sensor to detect the crane condition is checked. Otherwise, keep the key of the switch
extracted, for ordinary operations. When turning ON (cancel) the emergency stop cancel
switch, always shift the crane speed to low.
In particular, operations as below must be strictly avoided:
• To hoist a load, never raise the hook while this switch is set ON (released). The moment limiter
is disabled to detect a condition where the hoisted load exceeds the rated load, which causes
the wire rope breakage and the hoisted load to drop, damage to the boom, or overturning of
the machine.
• After the moment limiter detects a condition that the actual load exceeds the rated load during
the crane operation and interrupts it, winding up, boom lowering and/or boom extending
operation by turning this switch to ON (released) position must be strictly avoided. It may
result in boom damage or the machine overturning.
• For hook stowage, always use the Over-hoisting cancel switch, only. If this moment limiter
emergency stop cancel switch is used for hook hoisting, the winch will not automatically stop
in an over-winding condition which may allow the hook to swing into the boom tip or cause the
wire rope to snap.
Use this switch (11) only for the limited purpose of inspection and maintenance of the boom length
detector and angle detector, and the pressure sensor.
• ON (Clear): Insert the key into the switch. Turn the key clockwise
and retain the key at that position. The activation stop function is
cleared while the key is maintained at the ON position. When the
key is released, it will return automatically to OFF position.
• OFF (Auto): Insert the key into the switch and turn the key
counterclockwise. This activates stop functions.
The key can be removed or inserted at this position.
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