Liebherr has re-entered the rough-terrain crane market with the addition of two new cranes in the 100 US ton and 110 US ton classes.
The Liebherr Rough-Terrain cranes LRT 1090-2.1 and LRT 1100-2.1 were unveiled to the public at ConExpo-Con/AGG.
From the 1980s to mid-90s the Liebherr portfolio included a range of rough-terrain cranes – then called LTL-cranes. These cranes had a lifting capacity of 25 to 80 tons. The main focus at that time, however, was to add to the crawler cranes portfolio to build on the company’s global market leadership with various types of cranes. As the market leader in all-terrain cranes and crawler cranes, Liebherr has recently re-supplemented its product portfolio with a rough-terrain series.
The company said development of the new generation of Liebherr rough-terrain cranes was guided by extensive market surveys and analyses into the requirements for modern RT cranes, particularly in the market of North America. In addition to the capacity of the cranes, their safety from ease of operation was one of the main focal points for the development of the new crane models, the company said.
The two newly designed LRT cranes are based on the same basic technical concepts. The crane chassis and turntable are almost identical, while there are differences in the boom length, telescoping technology, ballast weight and lifting capacity.
The crane models are both powered by a Cummins diesel engine which meets all current emissions regulations. The engine develops 264 bhp and supplies a maximum torque of 730 lb. ft. A six-speed powershift transmission from Dana and 29.5 R25 tires guarantee the required off-road capability for the cranes, the company said. Their maximum speed is 15 mph. All-wheel and crab steering ensure easy handling and high maneuverability in constricted conditions, the company said.
The LRT cranes measure 12 ft. 8 in. in height 10 ft. 10 in. wide and are transported on public roads with a low loader. Their curb weight is less than 121,000 lb. with complete equipment including ballast or under 88,000 lbs. without ballast or equipment. The LRT 1090-2.1 and the LRT 1100-2.1 can be quickly and easily assembled once they have reached the work site, the company said.The outrigger pads which remain inside the width of the vehicle contribute to this, since they do not have to be removed for transport.
The 110 US ton LRT 1100-2.1 has a 164 ft. telescopic boom with a “Telematik” telescoping system on which the various telescoping sections can be extended independently with a single cylinder and then pinned to the telescopic section above. The telescoping system on the new rough-terrain crane is particularly simple and user-friendly as excellent lifting capacities over the entire radius range can be achieved with just two telescoping modes; Strong mode or Long mode. The lifting capacity of the LRT 1100-2.1 is around 15% higher than that of the 100 US ton model. The LRT 1090-2.1 features a 154 ft. telescopic boom. Its telescoping system consists of a two-stage hydraulic cylinder with a rope extension mechanism.
A second winch and the rooster sheave are included as a standard feature on the basic machine for two-hook operation. As an option, a 34.5 to 62 ft. double folding jib can be installed on the telescopic boom. It can be attached at an angle of 0°, 20° or 40°.