Liebherr has introduced its new LTR 1150 telescopic crawler crane, the first machine of its kind to be equipped with the VarioBase system.
The VarioBase variable supporting base not only provides improved safety for telescopic mobile cranes, but also allows significantly higher load capacities, especially for lifts directly over the supports.
The system determines the optimum load capacity in real time depending on the fixed track width and the variable rotation angle.
The greatest advantages for load capacity is achieved when performing lifts over the corners of the tracks, especially with reduced track widths.
A maximum track width of 5.8 metres, a reduced width of 5.0 metres and a narrow 3.5-metre track width are available.
As with the other Liebherr LTR cranes, the LTR 1150 is equipped with load charts for slopes up to a maximum of 4 degrees, in gradations of 0.3, 0.7, 1.5, 2.5 and 4 degrees.
For the first time, Liebherr has also calculated windspeed load charts for the new LTR 1150, which makes it possible to work safely and flexibly — even at higher permissible wind speeds of up to 15.6 metres per second, with the full load capacity in many boom positions.
With the launch of the LTR 1150, Liebherr is responding to the requirements of crane operators faced with lifting jobs that are beyond the LTR 1100, but for which the LTR 1220 is overkill.
The 150-tonne LTR 1150 is positioned exactly between the LTR 1100 and the LTR 1220. Although the new crane offers around 50 per cent more lifting capacity than the LTR 1100, it can be transported just as easily and economically as its 100-tonne sibling – complete with crawler carriers at a total weight of 60 tonnes and a transport width of 3.5 metres, or optionally without crawler carriers at a total weight of 38 tonnes and a width of 3 metres.
Low-loader transport
Another highlight of the new LTR 1150 telescopic crawler crane is its economical transport concept. According to Liebherr, no other telescopic crawler crane on the market in the LTR 1150 load class can be transported on low-loaders complete with crawler carriers with a width of just 3.5 metres.
The LTR 1150 not only makes this possible but also has a total weight of just 60 tonnes. For this reason, Liebherr has coined the slogan “Compact and strong, transport in one” for the new crane.
Optionally, the new LTR 1150 telescopic crawler crane can be transported with a width of 3 metres by removing the crawler carriers, which reduces the crane’s transport weight to 38 tonnes. This variant requires elevating the machine with the use of four swivelling cylinders, which support the crane on the ground while the tracks are removed and the low-loader positions itself under the crane.
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This principle has proven its effectiveness with the 100-tonne LTR 1100. Now, on the LTR 1150, an automatic support system assists the operator. This was developed to allow faster and easier assembly or disassembly of the crawler carriers.
The two crawler carriers, each weighing 11 tonnes, can be transported together on a standard semi-trailer with an economical width of 2.55 metres.
The integrated access steps are folded in during transport.
In terms of ballast distribution, a strong emphasis was also placed on ensuring economical transport worldwide.
With only four lifts, the entire counterweight can be ballasted on the crane: two lifts for the two 11-tonne central ballasts and two for the maximum slewing platform ballast of 41 tonnes. As with all Liebherr LTM cranes, this is attached to the slewing platform using a hydraulic ballasting device. Liebherr-AutoBallast supports the crane driver during this process. The support for the slewing platform ballast is integrated in the central ballast.
Wind farm ready
Thanks to its pick and carry characteristics, the new LTR 1150 is ideal for auxiliary tasks in the assembly of wind turbines. It is capable of assembling crawler cranes up to the 1,000-tonne class and can move components weighing more than 60 tonnes. Wind turbine components such as nacelles and hubs are in a similar weight range. As well as unloading these parts from the transport vehicles, the LTR 1150 can also drive them around the construction site without load restrictions.
This unique feature of telescopic crawlers in the telescopic crane sector also makes the machines appealing on construction sites where numerous lifts are required in different places. With the short, powerful erection jib and the additional hoist gear, the LTR 1150 can move loads weighing up to 34.6 tonnes into the desired position.
The range of working equipment for the 52-metre telescopic boom also includes a hydraulically adjustable double folding jib and telescopic boom extensions that allow hoisting heights of up to 83 metres.
