Liebherr LB 16 - Manual (Page 20)

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Systematic rotary drives
Liebherr rotary drives guarantee that the basic machines' excellent perform-
ance is ideally converted into high productivity.
Efficient rotary drive
The rotary drives feature a two-stage gear drive. The drilling speed is
continuously controlled by the operator via potentiometer. Thus, it is pos-
sible to react flexibly to changing soil conditions and to achieve optimum
crowd force. Especially when positioning the casing on hard ground it is
of vital importance to be able to reduce the drilling speed to a minimum.
Kelly shock absorber and drive adapter systems
The standard Kelly shock absorber with springs and hydraulic dampers pro-
tects the material and reduces noise emission. Exchangeable drive adapters
provide compatibility with other Kelly bar dimensions.
Casing oscillator
Liebherr offers a wide range of hydraulic casing oscillators. These can be
driven by the on-board hydraulics and controlled from the operator's cab or
via radio remote control. Moreover, it is possible to equip the rigs with the
customer's own casing oscillators.
Gearbox frame
Drive motor
Kelly bar
Schock absorber
Gearbox
Cardanic joint
Casing driver
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