16.07.2007

Liebherr adds 600 tonner

Liebherr is expanding its range of lattice boom crawler cranes with a new 600 tonne model LR 1600/2. The new crane has a load moment of 8,085 t/m and is based on the larger LR1750 design. It is targeted at the wind turbine installation market.

The company has fine tuned every aspect of the crane to ensure lower cost efficient transport and erection. It can set up without the need for an assist crane to place 3-MW turbines on top of 100 metre towers.

The new crane achieves its maximum lift capacity of 600 tonnes at 10 metres radius on a 48 metre main boom with derrick system.

The maximum 180 metre reach is made up of a 96 metre main boom with an 84 metre luffing jib, with a derrick boom system. Liebherr says that this set up is ideal for plant construction, enabling the crane to work over the top of tall buildings.
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The new 600 tonne Liebherr LR1600/2

The derrick boom can be extended up to 36 metres and equipped with maximum derrick ballast of 350 tonnes either suspended without a guide or with a ballast trailer and guide. The suspended ballast can be adjusted from 10 to 18 metres radius under full load. This provides a relatively compact footprint for large loads at shorter radii.

The optional ballast trailer radius can be adjusted from 13 to 18 metres using a hydraulic guide. The LR1600 can also use the ballast trailer from the LR 1750.

The maximum 190 tonne superstructure counterweight comprises standard 10 tonne slabs that are positioned on the brackets mounted on the sides of the slewing platform, avoiding the need for a wide, heavy base slab.

The ‘SL’ main boom, which combines the lower heavy sections with smaller lighter sections, can be erected with a length of up to 108 metres and a 12 metre fixed jib without a derrick boom. This combination offers under-hook heights of 117 metres with a capacity of over 95 tonnes. Ideal for placing 3-MW class wind turbines atop 100 metre towers.

When fitted with a derrick system, the same turbines can be mounted on 120 metre towers. The SL system also offers operators the advantage of being able to insert the upper boom sections inside the lower ones to reduce overall transport volumes.
A single boom head section can be used for all boom configurations and converts to a reducing section between boom extensions.

For transport the cranes crawler carbody, superstructure and ‘A’ frame, weighs 74 tonnes and is only 3.2 metres high so that it can be carried on a one metre high semi low-loader.
The weight can be reduced by 57 tonnes if the ‘A’ frame is removed.

Each track assembly with two metre wide track pads weighs less than 40 tonnes for transport on a four axle semi low-loader. Alternatively, 1.5 metre wide track pads are available.

The height of the boom sections is such that the counterweight slabs can be stowed underneath them during transport on a semi low-loader.

The new LR 1600/2 is powered by a six cylinder Liebherr diesel powering up to six winches.

The new crane is also fitted with a new wider cab which offers a second seat and includes three Liccon monitors,

The first machines are expected to be shipped during the first half of 2008.