Liebherr PR 724 Litronic - Manual (Page 9)

9 PR 724 Litronic
Reliability
Endurance-tested components
• As early as the design phase, com-
ponents are sized using FE analysis
and optimized to handle the loads and
stresses of the machine.
• The components are then subjected
to intensive endurance testing in the
laboratory and in the field. Only those
components which meet the high
quality standards are used in the
machines.
State-of-the-art cooling system
• The hydrostatically driven fan regulates the cool-
ing power as necessary: so the engine reaches
the ideal operating temperature faster.
• The cooling air is drawn in from zones protected
from dirt, and flows smoothly through the radia-
tor. This minimizes wear from dust particles.
• An optional reversing fan is available for quick
cleaning of the radiator and engine compartment
by changing the direction of the airflow.
The high quality and established technology of the PR 724 make it a machine of
the highest reliability. Specially developed components for use in construction ma-
chinery and durable cast steel parts at points under heavy stress guarantee stability
even in the most demanding situations.
Liebherr drive train
Liebherr engine Liebherr diesel engines have been developed for the
harshest operating conditions. The rigid ladder frame
ensures stability, while the low rated engine speed
guarantee reliability and long service life.
Wear-free drive
concept
The tried-and-tested hydrostatic travel drive does
without components such as the torque convert-
er, shifting gear and differential steering or steering
clutches. The standardized hydraulic pumps and mo-
tors operate practically without wear.
Long-lasting
final drives
The large final drives in Generation 4 machines are ex-
tremely robust and designed for very high loads. The
double seal with automatic leak monitoring offers reli-
able protection.
Robust steel construction
Box-type main frame The main frame is a box-type design. This makes it ex-
tremely resistant to buckling and easily able to absorb
the forces applied to it. Parts subject to heavy strain
are made of cast steel.
Intelligent solutions for continuous operation
Innovative cooling
system
The electrically controlled hydrostatic fan regulates
the operating temperature independantly of the engine
speed. This lowers fuel consumption and shortens the
time it takes to warm up the engine. The extra-large
radiator fins achieve an excellent self-cleaning effect.
High-quality wiring har-
ness protection
High-quality braided protection and an intelligently
planned wiring harness prevent condensation from
forming and provide lasting protection against me-
chanical damage.
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