Liebherr LB 16 - Manual (Page 22)

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Several newly developed features
Liebherr rotary drilling rigs are full of technical innovations resulting from Liebherr's many years
of experience in deep foundation applications. They provide the rigs with excellent performance
characteristics and allow for precise handling.
Automatic shake-off system
While Kelly drilling the auger is normally emptied by rotating it very quickly or through abrupt right-
left-movements of the rotary drive. In order to assist the operator Liebherr has developed an auto-
matic shake-off system. By moving the joystick in one direction the operator can directly activate
the process of shaking off. The system then carries out a pre-set number of right-left-movements
of the rotary drive until the auger is completely emptied.
Winch with free-wheeling
The free-wheeling function of the Kelly winch allows the Kelly rope to follow automatically without
any slacking of the rope. First the load - i.e. the Kelly bar with the auger - can be decelerated in a
controlled manner using the electric pedal in the operator's cab. Thereby the Kelly bar is lowered
in the borehole with the free-wheeling function. As soon as it reaches the bottom of the borehole
the Kelly winch stops and thus prevents the rope from slacking.
Automatic leader adjustment
In order to keep the inclination of the leader constant, the inclination can be pre-set to a certain
target value. By pushing a button on the joystick the leader automatically adjusts to the pre-set
inclination using the support cylinders. This automatic system works even during crawler and
swing operation.
Leader control via joystick as special operating comfort
The leader can not only be adjusted via the additional control panel in the cab but also via joystick,
which is an especially convenient alternative.
Retrofit kits for all purposes
Liebherr rotary drilling rigs include an extensive range of basic equipment. For special applications
a multitude of retrofit kits are available, e.g. a leader ladder or a concrete supply line. These ac-
cessories can be mounted quickly and easily on the leader on site thanks to the standard flexible
fastening system.
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