PR 722 B Litr. Liebherr PR 722 B Litr. Specifications & Technical Data (1998—2005)

Economical

The robust Liebherr Diesel engine for construction machinery with its long service life assures high performance output at lower operating costs.

Environmentally friendly

Low exhaust and noise emission due to the economical Liebherr Diesel engine. Maintenance-free bearing points on the attachments require no lubricants.

Easy to service

All maintenance points are easily accessible on the right hand side of the engine. Grease fittings could be reduced to a minimum.

Working hydraulic and attachments

The sensitive fine control of the working attachment is a result of the load sensing, on-demand control of the attachment hydraulics. The axial piston pump supplies only the amount of oil, which has been preselected by the operator via the servo assisted control, resulting in excellent fine control range and quicker working cycles. The dozer blades and rear mounted attachments have been perfectly matched in shape and robust design to the machine’s performance requirements. The number of lubrication points could be reduced to a minimum.

Litronic

A system comprised of intelligent electronics and functional hydraulics – monitors, controls, regulates and coordinates all key systems of the tractor’s hydrostatic travel drive.

Powerful

The hydrostatic travel drive allows travel and steering functions at constant positive power to both tracks and agility through turns and counterrotation.

Safe to operate

Protection of all drive components from overload due to automatic adjustment of travel speed to required push power.

Versatile

Due to the innovative track design with planetary gears and oil motors integrated within the track frame, the undercarriage can be matched to any job situation. A wide selection of front and rear mounted attachments is available.

Easy to operate

Simple and precise control of all travel and steering movements with only one joystick lever. The resiliently mounted track idler frames on pivot shaft and equalizer bar assures quiet travel behavior and absorbs vibration and shock loads.

Travel gear design

Due to the compact design, the final drive was integrated into the track frame for best protection. The 2-stage planetary gear with wet multi-disc brake and variable flow hydraulic motor form one single and easily accessible unit; evenly distributed power transfer extends life expectancy. Completely new for construction machines is the Liebherr-developed shock-mounted track suspension. Elastic components at the pivot shafts and equalizer bar efficiently absorb shock loads, resulting in a smoother operation, which reduces stress for both the machine and the operator.

Usage recommendation

We recommend using the 6-way-blade only with rear mounted attachment or counterweight. Available only with special track gauge 1680 mm.

Operator comfort

The comfort cab offers the operator a comfortable place to work as well as exemplary protection from noise and vibrations and excellent all-around visibility. All travel and working functions can be handled with only two ergonomically positioned joysticks, which are precise and fatigue-free due to electronic and hydraulic servo-assisted control.