Rigging work
11.8 Outrigger operation
11 - 60 3 302 633 en Operating Instructions GMK5250L
27.09.2017
Manual alignment • Check that the prerequisites are met; à p. 11 - 59.
• Extend all supporting cylinders until none of the wheels is touching the
ground.
• Level the truck crane with the supporting cylinders until the lamp (1) is the
only one lighting up in the measuring range 1°;
à p. 11 - 53.
• Only lift the truck crane as far as necessary.
Checks to be performed after levelling
During levelling, the ground may give way and the packing may slip.
• After you have levelled the truck crane, check:
– whether all the wheels are lifted off the ground,
– whether the ground under one of the outrigger pads has given way,
– that the packing is correct for the enlarged load-bearing area.
If slewing is permissible in the current rigging mode:
• Slew the superstructure within the permissible slewing range.
• Perform the specified checks again.
• Check the horizontal alignment on the inclination indicator.
G
Risk of overloading the main boom!
Always slew the superstructure to the 0° or 180° position and set down the
load before levelling the truck crane.
In other positions, the deformation of the carrier will distort the indicated
inclination and the truck crane will be at an angle. This could cause the
boom to become overloaded during crane operation.
G
Risk of accident due to incorrectly supported truck crane!
Perform the following checks each time you have levelled the truck crane
and correct any misalignments.
Otherwise the truck crane may overturn even when lifting a load released
by the RCL.
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