Following extensive testing, Liebherr has introduced the 31 XXT truck mounted concrete pump, the smallest pump type in its 30-metre series.
The 31 XXT is designed to include a compact five-part distribution boom that delivers a low unfolding height of 5.4 metres.
This means the pump provides maximum flexibility on smaller and cramped construction sites. The strength of the boom concept is particularly beneficial when working indoors.
The new LiDriveIn function is a highlight of the new truck mounted pump when working in construction sites with low ceiling heights. Thanks to LiDriveIn, the 31 XXT can enter a building in standard operation with the arm package folded in front of the driver’s cab.
To bring the arm package folded forward, it is not necessary to swing out the outrigger legs. Instead, only the cylinders must be moved downwards. The machine operator lifts the cylinders again and can enter the hall with the arm package in front of the driver’s cab.
Now, support can be provided as desired, in full, partial or single-sided support.
In the hall, the concrete pump boom can be easily unfolded in front of the driver’s cab thanks to the short arm segments and the low unfolding height.
This way, the last centimetres can be saved. For load reasons, the LiDriveIn function is only quoted in combination with a four-axle chassis.
Hose and pipe storage
Liebherr’s storage systems for hoses and pipes allow about 90 metres of conveyor lines to be carried.
After swinging out the concrete pump’s outriggers, all bearing magazines are accessible. As well, it is possible to store lines in diameters DN80/100/125. Due to the design of the magazine with individual pipes, each cable segment carried can be removed individually at will.
Powerbloc drive unit
Another highlight of the new 31 XXT is Liebherr’s proven Powerbloc pump drive unit. It is characterized by fully integrating all hydraulic switching and measuring elements. This eliminates the need for numerous hydraulic hoses and other components previously required. As well, the drive unit provides high performance while minimizing noise.
Semi-closed oil circuit
The new drive unit is combined with the highly efficient semi-closed oil circuit, which supplies all drives powerfully and reliably with hydraulic energy. As a result, the oil volume could be significantly reduced.
More news from Liebherr:
- Liebherr expands machine control to Gen 8 crawler excavators
- Liebherr develops hydrogen direct injection for combustion engines
- Liebherr introduces its largest crawler crane to North America
The new Liebherr system combines the advantages of the proven open and closed circuits currently on the market, without their respective disadvantages.
Thanks to the extensive accessories catalogue, Liebherr is able to meet the demands of all users of the truck mounted concrete pump. For example, LED lighting designs for optimal work in the dark, various storage boxes for materials and tools as well as shelves for hoses and pipelines are available.