More Height under Hook and Greater Load Capacity for Liebherr LG 1750 Lattice Boom Mobile Crane

In 2004 Liebherr brought the most powerful lattice boom mobile crane in the world onto the market – the LG 1750. Eight years later, and it still holds this record – and has no competitors in this class. Right from the start, the erection of wind power installations was a key area of operations for the 750 tonner, but the weights of the systems and the installation heights have been steadily increasing since then. Liebherr has been keeping pace with this trend with the development of longer and stronger boom systems.

With a new and even more powerful boom system, designated the SL12D2FB, the LG 1750 is now in a position to erect the new large types of wind power systems at tower heights from 140 m to 150 m.

In terms of design, the new system is derived from the tried and trusted SL9D2FB boom, a main boom with a fixed jib and derrick system. Thanks to the use of three strong 12-m lattice sections with a width of 3.5 m instead of 3.0 m in the lower area of the main boom, and the extension of the fixed jib, both the lifting capacity and the height under hook have been boosted on the new SL12 system. The LG 1750 can now achieve lifts of 141 tonnes at a height under hook of 143 m and 97 tonnes at 160 m.

A lattice boom mobile crane has some major advantages in the installation of wind power systems, providing high load capacities while at the same time being highly mobile on the construction site, with a chassis width of only 3 metres. The LG 1750 is also extremely flexible, both with regard to the different installation sizes as well as for operations outside the wind power sector. The basic machine of the LG 1750 can also be driven on public roads, which adds to the economy of transport of the crane.

The development of the new boom system for the LG 1750 is a further step forward in the product campaign by Liebherr in the sector of lattice boom cranes. This includes both the development of new crane types as well as the optimization of the existing product range.