Liebherr PR 754 Litronic - Manual (Page 5)

5 PR 754 Litronic PR 764 Litronic
Performance
Liebherr has successfully been building crawler tractors with hydrostatic transmis-
sion for the past thirty years. The generation 4 models exemplify power, efficiency
and capability in a wide range of applications.
Outstanding productivity
Impressive power
and drawbar pull
The powerful Liebherr diesel engine, combined with
Liebherr’s innovative driveline, makes ample power
available for every working situation. The hydrostatic
drive requires no gear shifting: engine power reaches
the tracks without interruption, even when turning.
High traction and
ripping power
Thanks to the hydrostatic transmission, the operator
simply selects the most suitable working speed. The
system automatically maintains peak engine rpm and
power efficiency. Track slip is kept low and maximum
power is continuously transferred to the tracks.
Bogie suspension For work on uneven or rough surfaces, Liebherr offers
different types of bogie undercarriages for increased
traction and pushing power.
Outstanding
maneuverability
The hydrostatic drive is particularly suitable for ripping
work. The machine can be turned quickly, the rear
mounted ripper positioned accurately between hard
rock layers, and the material broken out with the nec-
essary force.
Optimized blade
patterns
The blades for the PR 754 and PR 764 have had their
penetration and rolling behavior optimized, to increase
their transport capacity.
Low center of gravity The driveline assemblies are compact so that the com-
plete machine has a very low center of gravity, thereby
allowing safe operation on steep slopes.
Generous ground
clearance
The well-planned component layout is designed for
maximum ground clearance. Heavy duty belly pans
prevent damage when working on rough stone or rock.
Liebherr hydrostatic transmission
• Automatic speed and torque adjustment
keeps the engine working at optimal
power as the load changes.
• Even at low speeds, for example in
demanding ripping operations, the ther-
mal load of the hydrostatic travel drive
remains low. The efficiency of the drive
remained virtually unchanged.
Oscillating roller tracks
• When working on uneven surfaces,
oscillating bogie undercarriages
increase the ground contact area
and improve traction. In addition, the
resilient mountings effectively absorb
shock loads.
• For work on softer, more yielding
surfaces such as coal or wood chips,
tracks with rigid rollers are used.
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