Liebherr LHM 420 - Manual (Page 19)

19
State of the art: X-shaped support base
X-shaped Support Base
The operational position of the crane can be adapted
to the quay requirements on the basis of an X-shaped
stabiliser arrangement (quadratic and rectangular sup-
port is possible) and different sizes of supporting pads
depending on the condition of the quay. A special
Liebherr feature is the very solid propping system with
four swing-out arms forming a cruciform propping con-
figuration. Stresses and strains occurring during han-
dling operation are thereby transmitted via the shortest
route through the centre of the chassis onto the outrig-
gers and further to the ground.
s¬ 2EDUCTION¬OF¬TORSION¬STRAIN¬IN¬THE¬UNDERCARRIAGE
s¬ ,IFETIME¬ENHANCEMENT¬OF¬THE¬SLEWING¬BEARING¬
and the chassis
s¬ /PTIMISED¬VERTICAL¬STABILITY¬DURING¬OPERATION
s¬ -AINTENANCE¬FREE¬OUTRIGGERS¬OF¬X
SHAPED¬SUPPORT¬BASE
s¬ &LEXIBILITY¬OF¬THE¬X
SHAPED¬SUPPORTING¬BASE¬NEEDS¬LESS¬
space to pass narrow areas