Crane operation
11.5 Crane operation with main boom
Operating manual 3 302 819 en 11 - 89
GMK3060
13.12.2018
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 operating
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 incomplete monitoring!
If the lifting limit switch is overridden, crane operation is no longer completely
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.
S
Risk of damage due to overridden slewing gear shutdown!
If the lifting limit switch has been overridden, then the load torque related shut-
downs of the slewing gear will not be released (for example, if the pre-tensioning
pressure of the counterweights is too low). In this case, avoid moving the control
lever for slewing as long as the lifting limit switch is overridden.
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