Manitowoc Grove GMK 4100L-1, Operating Manual

Page: 617 / 1016

Crane operation
11.4 Operation of the rated capacity limiter
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11.4 Operation of the rated capacity limiter
The rated capacity limiter is abbreviated to RCL ( R ated- C apacity- L imiter) in
these operating instructions.
If the truck crane's current rigging mode is registered properly, the RCL will
prevent the permissible lifting capacity from being exceeded and the truck
crane from being overloaded.
The current rigging mode is registered via
– Measurements,
– acquired via manual entry.
During the operation of the crane, a visual and acoustic early warning is
issued before the load limit is reached and then the functions are shut down
that would lead into the overload range.
G
Risk of accidents due to an incorrectly set RCL
Ensure that the current rigging mode is correctly entered Before starting
crane operation. An incorrect entry will give you a false sense of security.
This may result in the truck crane overloading and causing an accident.
Acquired via measurements Acquired via manual entry
– Main boom length
– Main boom angle
– Current load
– Lattice extension inclination
1)
– Outrigger span
– Counterweight
– Length of lattice extension
– Angle of the lattice extension
2)
– Reeving
1)
Lattice extension – luffable
2)
Lattice extension – inclinable
G
Risk of accidents due to overridden or faulty RCL
The RCL must never be overridden.
It is prohibited to work if the RCL is switched off, overridden, out of service
or faulty.
G
Danger of overturning in two-hook operation
The rated capacity limiter only ensures safety for single hook operation.
Two-hook operation is not permitted.