“We decided on the Liebherr 750-tonne crane since no other manufacturer had a comparable product in this size class”, said Matthias Wasel, managing director. “The new LR 1750/2 with the SX boom system and VarioTray will position us perfectly for handling the new generation of wind turbines. The new boom system significantly increases load capacity values, and yet its transport costs are less than using the next higher crane class. The new crawler crane will be operating for around 75 percent of the time in the wind industry with its other jobs in the project business.”
For the Liebherr LR 1750/2’s SX system, two or three 3.5- or 6-meter-wide and 14-meter-long lattice sections are installed in the lower section of the main boom. This provides additional rigidity to the boom system, thus increasing its load capacity.
The VarioTray ballast system developed by Liebherr gives the Liebherr LR 1750/2 additional flexibility for crane operations. It consists of a removable ballast frame for the derrick boom, which is unbolted from the suspended ballast frame and can be used separately with up to 125 tonnes of counterweight. For heavy components and large radii, the removable ballast frame can simply be bolted into place before luffing down the boom to avoid long-winded stacking and unstacking.