Liebherr Tilt-rotator - Manual (Page 3)

Solution
Grüner und Mühlschlegel chose to tackle these applications with
an A 918 Compact Litronic wheeled excavator weighing about
18 tonnes, and equipped with the LIKUFIX fully hydraulic quick
coupling system. Its tail swing radius of only 1.85 m means the
excavator has a short rear end and is ideal for use in road build-
ing and city centre tasks. The machine is powered by a 110 kW /
150 PS Liebherr diesel engine developed in conjunction with
MAN. This engine meets the requirements of exhaust emissions
stage IIIB without needing to use a particle filter. All that is re-
quired for exhaust purification is an oxidation catalytic converter
which is maintenance-free when used with low-sulphur engine
oil as standard. As a result, maintenance costs are reduced. The
drive unit sets new standards in terms of fuel consumption for
this machine class. In some cases, the company’s machine op-
erator can achieve less than 7 litres/hour, with the average figure
between 7 and 9 litres/hour. The A 918 Compact Litronic offers
a high lifting capacity, powerful excavating forces and very good
performance combined with low fuel consumption. This means
it meets the requirements of the construction company in terms
of productivity and efficiency.
Using Liebherr’s own LIKUFIX quick coupling system, the ma-
chine operator can change over from one tool to another within
15 seconds, without leaving the cab. It can use backhoe buck-
ets, tilting buckets, a n add-on compactor and a Liebherr TR 25
tiltrotator with backhoe bucket. The Liebherr tiltrotator is being
used first for the extension to Hans-Liebherr-Strasse in Biber-
ach, a project which also includes building a roundabout. It has
already become the most used working tool on this construction
site. Flexible use of the attached backhoe bucket significantly
reduces unproductive repositioning of the hydraulic excavator
during working; this increases the machine’s productivity.
The road extension became necessary due to building of a new
school in Biberach, which will become one of the largest educa-
tional facilities in Baden-Württemberg. Grüner und Mühlschlegel
has been given the order of completing the construction work
in this building project, and the company is doing this as part of
a consortium of contractors in which it is playing the manage-
rial role. Liebherr tiltrotators have a tilting angle of 2 x 50° and
can rotate endlessly through 360°. The tilting cylinder is located
horizontally and is installed in a protected position. Even at the
maximum tilting angle, it does not have any protruding parts
which might be damaged when working in cramped conditions.
This ensures low service costs and makes Liebherr tiltrotators
the ideal tool for working with retaining walls or in the immediate
vicinity of structures. These jobs arise particularly frequently at
Grüner und Mühlschlegel. In this regard, the laborious job of dig-
ging by hand can be reduced to a minimum. The A 918 Compact
Litronic is equipped with the ergonomic Liebherr proportional
control, meaning that the tiltrotator can be operated quickly,
sensitively and precisely. Grüner und Mühlschlegel selected the
tiltrotator configuration recommended by Liebherr. The Liebherr
tiltrotator is equipped with the Liebherr LIKUFIX quick coupling
system on the top. This means the tiltrotator is only mounted
when it is actually needed. This reduces fuel consumption, in-
creases the service life of the tiltrotator and makes it possible
to exploit the maximum lifting capacity of the hydraulic excava-
tor during load lifting work. And when the job involves loading
trucks, the tiltrotator can be dropped off to allow the largest pos-
sible backhoe bucket to be mounted. As a result, a high material
loading rate is achieved with low fuel consumption. The fully au-
tomatic central lubrication system fitted as standard offers ad-
ditional convenience for the operator and increased productivity
for the machine owner. Work can continue during the lubricating
process (attachment and swing ring). To protect the lubricant
tank of the central lubrication system against vandalism, it is
installed behind the left service door as standard. The machine
operator positively rates this equipment and the fact that daily
maintenance work can be performed from the ground. The effi-
ciency of the new machine is so great compared to the old ones
that the company is now considering whether to bring forward
the originally planned renovation of the machine fleet.