Liebherr is showcasing its new 42 M5 XXT truck-mounted concrete pump at this year’s World of Concrete. The machine features a compact design, suitable for use in restricted job sites. Equipped with a five piece multi-folding mast, it has an unfolding height of under 28.2 ft (8.6 m) and a vertical reach of 135 ft (41 m).
The XXT outrigger support system offers high versatility in setting up the pump. It is safe and stable in any position, thanks to the direct load transfer. A redesigned rear end enables easy access to the pump for operation and maintenance. The 42 M5 XXT made its world debut last year at the bauma 2019 in Munich, Germany.
Liebherr has also introduced its Powerbloc hydraulic unit at the World of Concrete, designed exclusively to power concrete pumps.
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 this configuration is simple, reliable and powerful. However, this 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 a 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. According to Liebherr, this is a unique drive unit in the concrete pump sector, as the Powerbloc is powered by a semi-closed hydraulic circuit, which supplies all drives with hydraulic energy. As a result of this new design, the oil volume is significantly reduced – but performance is not compromised. Although the system weighs less, it is smoother, more efficient, quiet and safe, meaning less wear and tear and longer equipment service life.
Liebherr booth: Central Hall (C-5677)
Note: More products on display at the World of Concrete 2020 (4 to 7 February) can also be found in our Nov/Dec 2019 issue.