Liebherr TA 230 Litronic - Manual (Page 23)

44 // Quarrying Quarrying // 45
In Colmar, France, Liebherr manufactures
crawler excavators weighing between
18 and 100 tonnes. Every crawler
excavator is perfectly tuned to the
requirements that await it in practical
operation. The machines are subject to
a continual improvement process to
increase productivity and economy.
With all crawler excavators, the driver
can choose any of four operating modes.
The mode preselection switch adapts
the engine and hydraulic power to
the operating conditions encountered,
for example, for maximum digging
performance in heavy-duty operations
or for maximum economy and minimal
environmental impact. The “E-Economy”
mode for economical, eco-friendly
working is recommended for normal
working conditions. The automatic idling
function is controlled by sensors and
provides for reduced fuel consumption.
If there is no working movement within a
predefined period of time, an automatic
start/stop function is activated. This also
contributes to reduced fuel consumption.
When working in a quarry, some excavator
components are exposed to hazards, for
example, damage caused by flying stones.
This is especially possible if a cast steel
drop ball is used for blasting material.
Special protective features have been
developed for such operations to prolong
the service life of the most important
components. Our customers are able to
choose the relevant options. These include
a piston rod guard for the hoist and bucket
cylinder, hose protection for the hoist
cylinder, bottom boom protection for the
stick and monoblock or a cover for the
slewing mechanism and lubrication lines.
Besides the standard machines Super
Mass Excavation (SME) excavators, such
as the R 950 SME, R 960 SME, R 970 SME
and the R 980 SME, are especially well-
suited for quarrying operations and offer
a number of special features. The
excavator is equipped with a reinforced
under carriage featuring under carriage
components from the next model up in
the product range. In conjunction with a
greater ballast weight, these improve the
stability of the machine, even with a larger
bucket volume. The equipment has been
adapted to allow for higher tear-out and
breakout forces. The bottom line is that
these measures enhance the performance
and economy of the excavators. SME
excavators are available worldwide with
IIIA / Tier 3 or IIIB / Tier 4i engines.
The wheel loaders are manufactured
in Bischofshofen, Austria. They achieve
maximum turnover rates with low operating
costs. With the combination of Liebherr
travel drive and the advantageous
installation position of the diesel engine,
the machines achieve high tipping loads,
which increases productivity.
The machines consume up to 25 % less
fuel than conventionally powered wheel
loaders. The basis for this is the drive
concept. The hydrostatic travel drive allows
the Liebherr diesel engine to be installed
at the rear. Compared to conventionally
driven wheel loaders, this leads to a higher
tipping load with considerably lower
operating weight and a higher turnover
rate per hour of operation. The travel drive
automatically adjusts the tractive force and
speed to the requirements of the quarrying
operation. This reduces tyre wear by up
to 25 % and brake wear almost completely.
Large wheel loaders such as the L 586,
currently the world’s largest hydrostatically
powered wheel loader, are primarily used
in the quarrying industry. For all machines,
there is a range of equipment options
available that are needed for the intensive
operations encountered in the quarrying
of raw materials. These include rock and
rehandling buckets and special tyres for
use in quarrying. The cab is noise insulated
as standard for safe and comfortable
working; non-slip step surfaces and stable
hand rails provide additional safety. The
freely adjustable control lever, which is
produced in-house, is fitted as standard.
The same thing applies to the rear-view
camera (on the L 550 to L 580) and the
steel fuel tank. Optionally, a protective
grille can also be selected for the
windscreen or a protection for the tilt
cylinder.
Power and innovative technology are the
hallmarks of the crawler tractors built in
Telfs, Austria. Whether they are used for
tough digging operations or shifting heavy
material, the PR 754 and PR 764 impress
in all operations with their outstanding
performance and economy.
Liebherr machines in quarrying
Liebherr machines are used in a variety of quarrying operations. Excavators, wheel loaders,
crawler tractors and articulated trucks work with enormous power and yet low fuel consumption.
That means they make it possible to work economically in quarrying.
Overview
Liebherr machines are used for various
applications in the quarrying industry.