Crane operation
11.1 Before operating the crane
11 - 10 3 302 690 en Operating manual
GMK4100L-1
23.11.2017
11.1.4 Checking the safety equipment
Rated capacity
limiter
• Switch on the rated capacity limiter (RCL), do all of the checks and enter
the current rigging mode;
à Enter rigging mode, p. 11 - 32.
• The RCL is working correctly at this point in time if no error message is
pending and if crane movements have been enabled.
If the RCL is not working correctly, do not start crane operation but rather
notify
Manitowoc Crane Care.
Lifting limit switch
• Raise the main boom until the hook block is lifted off the ground.
• Slowly perform the Raise movement until the hook block lifts the lifting
limit switch weight.
• Now check whether the Raise movement is switched off and lamp (1)
lights up
• Check whether the Lower and Extend movements are also switched off.
The lifting limit switch is working correctly at this point in time if the
lamp (1) lights up and the
Raise, Lower and Extend movements are
switched off.
If the lift limit switch is not working correctly, do not start work with the
crane but notify
Manitowoc Crane Care.
G
Risk of accidents when working with faulty safety devices
It is prohibited to operate the crane with safety devices that are faulty,
overridden or out of service.
Have faulty safety devices repaired immediately by
Manitowoc Crane Care.
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