Manitowoc Grove GMK 5250L Operating Instructions Manual page 642

Crane operation
10.5 Crane operation with main boom
Lowering the
main boom to
a horizontal
position
10 - 88
The main boom can be set down by referring to the working curves within
the working range specified in the lifting capacity tables .
These additional pages supplement the information (1) in the lifting capacity
tables supplied for the main boom intermediate lengths.
To prevent any overloading of the derricking cylinder, the derricking
cylinder pressure is also monitored here.
In this case the RCL shows the reduced maximum load bearing capacity on
the Maximum load display.
The RCL continuously calculates this value while taking the derricking cylin-
der pressure into account. If the current load is too big, the RCL shuts down;
à
p. 10 - 58.
In area (Z) of the main boom intermediate
lengths it can be the case, particularly with
main boom angles below 15°, that loads spec-
ified in the lifting capacity table are not reached
for shorter main boom lengths.
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