At World of Concrete 2020, Liebherr will introduce its redeveloped 42 M5 XXT truck-mounted concrete pump, as well as the new Powerbloc drive unit.
The 42 M5 XXT is versatile and compact, allowing the machine to work easily at constricted job sites. With the Powerbloc, Liebherr for the first time has created a product that combines the best features of open and closed hydraulic systems.
Liebherr developed every aspect of the 42 M5 XXT with the end user in mind. Equipped with the popular five-piece multi-folding mast, the machine has an unfolding height of under 8.6 metres and a vertical reach of 41.1 metres.
The low unfolding height and mobility of the 42 M5 XXT give the machine boom flexibility and support in a compact unit.
As well, Liebherr’s XXT outrigger support system delivers flexibility in setting up the pump. It is safe and stable in any position thanks to the direct load transfer.
Furthermore, a redesigned rear end permits easy access to the pump for operation and maintenance. The 42 M5 XXT made its world debut at Bauma 2019 and is being introduced to the American market for the first time at World of Concrete.
Liebherr Powerbloc
Most concrete pumps use alternating pistons that drive cups to move concrete through a boom and are used to pour the concrete in the desired location.
The pistons, in turn, are connected to hydraulic cylinders that are powered with high pressure oil, which provides the energy to pump concrete.
Typical hydraulic systems are comprised of many components. Essentially, systems are either of an open or closed-circuit design.
Liebherr has typically used an open design on its concrete pumps, as the configuration is simple, reliable and powerful.
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However, the design takes up more space, requires more oil and weighs more. A closed-circuit setup addresses these concerns, but incorporates more components and is therefore more complex.
The Liebherr Powerbloc is the new drive unit for the pump system. With this new design, all hydraulic switching and measuring elements are completely integrated, which eliminates numerous hydraulic hoses and other parts. This is a one of a kind drive unit in the world of concrete pumps, as the Powerbloc is powered by a semi-closed hydraulic circuit, which supplies all drives with hydraulic energy.
As a result of the new design, oil volume is significantly reduced, without compromising performance. Although the system weighs less, it is smoother, more efficient, quiet and safe. Smooth operation means less wear and tear and longer equipment service life.
