Crane operation
11.5 Crane operation with main boom
11 - 94 3 302 819 en Operating manual
GMK3060
13.12.2018
Switching off the
derricking gear
If the derricking gear is not required, it should be switched off to avoid uninten-
tional use.
• Press the button (1) once.
– The lamp in the button (1) will light up dimly.
– Symbol (2) will be red if the derricking gear is switched off.
If the control lever is assigned more than one function, the derricking gear will
also be switched off if you switch on another power unit which is assigned to the
same control lever movement;
à Control lever configuration, p. 9 - 14.
Lowering the
main boom to
a horizontal
position
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 area (Z) of the main boom intermediate lengths
it can be the case, particularly with main boom
angles below 15°, that loads specified in the
Lifting capacity table are not reached for shorter
main boom lengths.
In this case the RCL shows the reduced maximum load capacity on the Maximum
load display.
The RCL continuously calculates this value while taking the derricking cylinder
pressure into account. An RCL shutdown occurs if the current load is too heavy;
à p. 11 - 61.
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