Liebherr PR 754 User Manual
Crawler Tractors PR 764PR 754
Engine Output (SAE J1349): 250 kW / 335 HP 310 kW / 416 HP
Engine Output
Operating Weight: 35,000 - 40,800 kg 44,220 - 52,685 kg
(ISO 9249): 250 kW / 340 HP 310 kW / 422 HP
77,162 - 89,948 lb 97,488 - 116,150 lb
PR 754
PR 764
Engine Output (SAE J1349): 250 KW / 335 HP
Engine Output (ISO 9249): 250 KW / 340 HP
Operating Weight: 35,000 - 40,800 kg
77,162 - 89,948 lb
Blade Capacity: 8.9 - 11.7 m³
11.6 - 15.3 yd³
Hydrostatic travel drive,
electronically controlled
Engine Output (SAE J1349): 310 kW / 416 HP
Engine Output (ISO 9249): 310 KW / 422 HP
Operating Weight: 44,220 - 52,685 kg
97,488 - 116,150 lb
Blade Capacity: 13.6 - 17.0 m³
17.8 - 22.2 yd³
Hydrostatic travel drive,
electronically controlled
PR 754 Litronic PR 764 Litronic
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Performance
Power and innovative technology are features of
Liebherr’s generation 4 crawler tractors. Their excellent
power-to-weight ratio stands for maximum productivity in all operating conditions. Whether ripping hard
ground, moving material or grading surfaces, the outstanding performance of the PR 754 and PR 764 never
fails to impress.
Reliability
Sturdy and strong: Liebherr crawler tractors and the
materials used to build them are designed for long,
trouble-free life. Components subject to severe loads
are made from high-strength materials, and points
exposed to possible damage are well protected.
Liebherr crawler tractors owe their high levels of availability to these stringent reliability standards.
Economy
Liebherr’s economic advantages are undisputed: like all
Liebherr machines, the PR 754 and PR 764 save money by
being easy to service, with shorter down times and lower
maintenance costs. The latest generation of Liebherr diesel engines combines performance with economy, and
with the machines’ efficient drive-train, impressive power
is available at minimum fuel consumption.
Comfort
The operator of a generation 4 Liebherr crawler tractor works in a cab of generous size, with controls laid
out according to the latest ergonomic principles. This
well-designed cab provides an ideal view of the work
area and the working equipment. Intuitive single joystick
control makes for sensitive and accurate dozer operation.
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PR 754 Litronic PR 764 Litronic
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Liebherr diesel engines featuring
the latest technologies:
• Electronically controlled, the power
output and torque curves are designed
for outstanding power and tractive force
when ripping or dozing.
• Environmentally responsible and economical: the engines comply with the
latest exhaust emission limits.
• An extra-deep oil sump maintains
engine lubrication at slopes of
up to 45 degrees (PR 754) and
40 degrees (PR 764).
Performance
Liebherr has successfully been building crawler tractors with hydrostatic transmission 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
High traction and
ripping power
Bogie suspension
Outstanding
maneuverability
Optimized blade
patterns
Low center of gravity
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.
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.
For work on uneven or rough surfaces, Liebherr offers
different types of bogie undercarriages for increased
traction and pushing power.
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 necessary force.
The blades for the PR 754 and PR 764 have had their
penetration and rolling behavior optimized, to increase
their transport capacity.
The driveline assemblies are compact so that the complete machine has a very low center of gravity, thereby
allowing safe operation on steep slopes.
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 thermal load of the hydrostatic travel drive
remains low. The efficiency of the drive
remained virtually unchanged.
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.
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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Specific fuel consumption [g/kWh]
Engine rated speed [1/min]
PR 754 Litronic PR 764 Litronic
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Constant engine speed
keeps fuel consumption low
• Since the engine’s nominal operating speed is in the region of its lowest
specific fuel consumption, maximum
operating economy is assured.
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