Turbine trailblazer from Liebherr
19 March 2008
Liebherr sets new standards with ts new 600 tonne capacity crawler crane, the manufacturer claimed.
The lattice boom LR 1600/2 was devised with the assembly of wind urbines and plant construction in mind. Maximum load capacity is available to a 10 m radius, on a 48 m main boom and with a derrick system, giving a maximum load moment rating of 8,085 tonne-metres. The maximum reach of 180 m is obtained using 96 m of main boom and an 84 m luffing jib with derrick system.
“This system length is ideal for plant construction, enabling the crane to work over the top of tall buildings. With a derrick boom of up o 36 m in length, the maximum 350 onne derrick ballast is adjusted from 10 to 18 m radius as a suspended ballast without a guide and under ull load. This design principle has already been tried and tested on other Liebherr crawler cranes with great success,” commented Liebherr's Wolfgang Beringer.
The lattice crawler's maximum 190 tonne superstructure ballast comprises standard 10 tonne slabs, positioned on brackets mounted on the sides of the slewing platform, meaning a wide, heavy base slab is unnecessary.
A ballast trailer, with a 13 to 18 m adjustable radius, is available as an optional extra.
“It is also possible to use the ballast trailer from the LR 1750, a major bonus for crane operators who already own this Liebherr 750 tonner,” said Beringer.
For wind turbine assembly the crawler's SL main boom can be erected to 102 m, without a derrick system. A 108 m SL system with 12 m fixed jib is also available, giving a maximum under hook height of 117 m, again without a derrick or second crane to assist.
Transportation costs will be reduced as the 74 tonne, 3.2 m-high basic machine can be carried on a 1 m-high semi low loader.
The A-frame can also be removed, reducing the basic weight by 57 tonnes. “This option is available as standard and means that the crawler centre section and slewing platform can be transported as one and a quick connection can be saved,” Beringer added.
The SL system allows the boom sections to be inserted inside one another for transport, reducing overall transport volume, while the same head section can be used for all boom systems. In addition, the boom head adapter serves as a reducing section in boom extensions.
LR 1600/2 operators are also in for an easier ride thanks to a new cab, offering a second seat and three LICON monitors, which offer work planning and operational information to maximise safety.
The first machines will be delivered in the first half of 2008.
