17.11.2005

New 1,250 tonner from Liebherr

Liebherr has announced a new heavy lift crane, the LR 11250 with a maximum lifting capacity of 1,250 tonnes at a radius of 14 metres and a maximum load moment of 21,714 tonne/metres. Liebherr claim that the LR 11250 is the most powerful crawler crane on the market with a transport width of 3.5 metres.

The new 1250 tonner offers a combination lift height of up to 228 metres with a main boom of 114 metres and a luffing fly jib also 114 metres in length. The LR 11250 can, thanks to its conventional A-Frame design, erect main boom lengths of up 102 metres without a derrick system. When a derrick mast is used, Main boom lengths of as long as 150 metres can be achieved.
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The new Liebherr LR11250 crawler crane

A counterweight trolley with hydraulically continuous radius adjustment is available for the derrick mast, with up to 600 tonnes of counterweight. A fully suspended derrick counterweight system is available as an alternative.

Liebherr has spent a great deal of time at the design phase of the LR 11250, on cost-effective, easy transportation. The result is that no parts of the crane exceed a transport width of 3.5 metres or maximum transport weight of 45 tonnes.

The boom has also been designed for economical transport as an example, the intermediate jib sections can be inserted into the intermediate sections of the main boom with the aid of track rollers.

The LR 11250’s drive unit with diesel engine, hydraulics, electrics and crane cab can be transported as a complete unit.

A 640 kW, 6-cylinder Cummins diesel engine, powers the new crane, which boasts six winches. The hook block, has been designed in a modular fashion and comprises a hook and four roller blocks. This allows it to be modified without difficultly for different applications, right up to a maximum lifting capacity of 1250 tonnes.

The first unit out of production is currently being set up for testing at the Liebherr plant in Ehingen. It is expected to ship in early 2006 to China where it will be used in the construction of chemical plants.