Manitowoc Grove GMK 4100L-1, Operating Manual

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Rigging work
12.8 Outrigger operation
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GMK4100L-1
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7
Manual alignment
•
Check that the prerequisites are met;
à
p. 12 - 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. 12 - 54.
•
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:
– that all the wheels are lifted off the ground.
– that the ground has not given way under any of the outrigger pads.
– 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.
Automatic
alignment During the automatic alignment procedure, the supporting cylinders are
extended only to prevent any wheels touching the ground after the
alignment.
•
Check that the prerequisites are met;
à
p. 12 - 59.
G
Risk of accidents 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 allowed
by the RCL.