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2.4.5 OVERRIDE SWITCH
Override switch has a function to disable the moment limiter.
When this switch is turned ON, the crane does not automatically stop with the moment
limiter and is very dangerous. Any crane operation in such conditions may
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, which detects the crane conditions, fails or
a load test of the crane is conducted. Key for the switch must be detached during normal
operations.
In particular, never perform the following uses.
• Never wind up the hook when hoisting loads.
Even if a load of hoisted load exceeds the rated total load, the mome
detect it, resulting in a possible dropping of hoisted load, boom breakage and machine
tipping due to cutting of the winch wire rope.
•
After the moment limiter detects that the rated total load is exceeded during crane
operation and automatically stops the operation, do not perform hoisting operation, boom
lowering operation and boom extension operation while the operation stop function is
cancelled by turning this switch to the "ON" position. Such operation may cause boom
breakage and machine tipping.
• Use the hook storage switch when storing the hook. If this switch is turned ON to perform
hook hoisting operation, automatic stop is not made in an overwinding condition.
Use this switch only when the moment limiter fails or a load test of the
crane is conducted.
• ON: Insert the key into the switch. Turn the key clockwise
and then return it to the original position. The key
automatically returns to the "OFF" position when you
release your hand.
The operation stop function is cancelled for 3 minutes
after it is turned ON.
• OFF: The key can be removed or inserted at this position.
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