New LTM 1750-9.1 mobile cranes have been leaving the Liebherr plant in Ehingen for the last few weeks. One of the very first machines was collected by Bergheim-based Breuer & Wasel. The new crane was driven from the factory site straight to the north of Germany where it erected four wind turbines each with a capacity of 3.4 MW and a hub height of 78-meter near Brunsbüttel.
Two months after the delivery of the LTM 1750-9.1 prototype, there are already a dozen machines in use. This year alone Liebherr plans to supply around 40 LTM 1750-9.1 machines to its customers. The crane is equipped with a 52 meters telescopic boom and has a maximum load capacity of 750 tons.
“You can drive it like a car”
– Crane driver Daniel Decker
“I’ve found the crane to be superb”, says crane driver Daniel Decker about his new tool after working for a week in the new wind farm. Prior to this, Decker and his colleague Michael Michatz had driven the nine-axle machine clear through Germany. “You can drive it like a car” continues the experienced crane driver after his lengthy 800km trip on autobahns and national routes.
On the site the 750-tonner quickly impressed the two crane drivers as a result of its good handling and fast setup times. “During the setup process it stands perfectly on three supports”, says Decker. The crane travels on roads with only its front supports. It fits its rear ones at the site by itself. It has an auxiliary support at the rear for this purpose.
The crane team and fitters only need around two working days to erect a complete wind turbine with a hub height of 78 meters and a rotor with a massive diameter of 104 meters. The crane scores very heavily for moving to the next site. Only the luffing jib has to be removed back to the pivot section. The supports, guying, telescopic extension and 54 tons of ballast are left on the crane. If the roads and tracks are perfect, even the maximum ballast of 84 tons can remain on the crane.