Crane operation
10.5 Crane operation with main boom
10 - 116 3 302 633 en Operating Instructions GMK5250L
27.09.2017
Slewing The following requirements must be fulfilled before slewing:
– The superstructure is unlocked;
à p. 10 - 15.
– Slewing is permissible with the current rigging mode;
à p. 11 - 93.
– The current rigging mode is shown on the
RCL display.
If slewing is not permissible with the current rigging mode, the slewing gear
will be locked.
Releasing locked
slewing gear
You can unlock the slewing gear if it has been locked.
• Press and hold the button (1) – the slewing gear is unlocked. The speed is
reduced to 10%.
You can adjust the sensitivity of the control levers to suit the operating con-
ditions;
à Setting the characteristic curves for the control levers, p. 10 - 126.
G
Risk of tipping over after confirming an incorrect rigging mode!
Before slewing, always check that the current rigging mode is shown on the
RCL display.
This prevents slewing operations from being enabled within the impermis-
sible ranges, which would cause the truck crane to overturn.
G
Risk of crushing during slewing!
Before slewing, operate the horn and ensure there are no persons in the
slewing range.
This prevents persons from getting crushed between the superstructure
and the carrier or between the superstructure and other parts.
S
Risk of the main boom buckling!
Do not accelerate the slewing speed to such a degree that the load starts
swinging.