Manitowoc Grove GMK 4100L-1, Operating Manual

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Crane operation
11.5 Crane operation with main boom
Operating manual 3 302 690 en 11 - 83
GMK4100L-1
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3
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7
Lifting limit switch override
When overriding, the shutdown of the lifting limit switch is cancelled and
the crane operation is no longer completely monitored.
•
Press the button ( 2 )
– The lamp ( 1 ) flashes.
– A buzzer tone sounds.
If the lifting limit switch is triggered now,
the crane movement is stopped
once .
The stopped crane movement is enabled
again if you bring the control lever to zero
position and then move it again.
This crane movement will now not be stopped
again.
Cancelling the override
•
Release the button ( 2 ) or leave the shutdown
range.
– The lamp ( 1 ) goes out.
– The buzzer tone is switched off.
s
G
Risk of accidents if the lifting limit switch is overridden
You may override the lifting limit switch only if this is specified in the oper-
ating instructions for carrying out maintenance or rigging work.
With the lifting limit switch overridden, you may drive only at the minimum
speed and without a load.
G
Risk of accidents due to gaps in monitoring
If the lifting limit switch is overridden, crane operation is no longer com-
pletely monitored.
When hoisting the lifting limit switch weight, the crane movement will be
stopped once. After moving the control lever again, the crane movement
will again be enabled and will not be switched off again.