Webasto auxiliary heating and air conditioning are managed through a new A/C control unit.A first for RT cranes, the cab’s standard integrated cooler keeps the operator’s drinks and lunch cold. To reach the cab, there are four access points on the RT cranes: two on the right, one on the front, and one at the front with rails to make the climb to the deck easier.With the attention placed on growing these offerings, the company discontinued its LTL rough-terrain crane production, of which it had built about 430 machines in the 25- to 80-tonne range.Today, the company offers 38 different cranes in its LTM and LR product lines.
Stöhr says that during its industry research, the company received mixed feedback regarding the telescoping boom systems.By applying its KISS (Keep It Simple and Safe) philosophy to determine what the crane should look like, what components should be used, and how it should be assembled, Liebherr designed the LRT 1100-2.1 and LRT 1090-2.1 rough-terrain cranes to have a nearly identical chassis and turntable but vary in boom length, telescoping technology, counterweight, and lifting capacity.Karl Stöhr, product manager and sales administrator for Liebherr-Werk Ehingen’s telescopic cranes, says the company started with 100- and 110-ton capacities because the North American market sees the 90- to 110-ton capacity cranes as the class with the strongest growth potential.Although Liebherr expects to maintain its worldwide market share with its ATs and crawlers, Christoph Kleiner, managing director of sales for Liebherr-Werk Ehingen, presumes there is little to no opportunity to increase market share by continuing with the status quo.As a first step in strengthening and widening its footprint in the crane industry, Liebherr has grown its sales and service.
The RT cranes are built to one safety standard worldwide, with a load capacity chart that meets ANSI regulations, Europe’s EN 13000, Australian standards, and Russian GOST standards.Ten prototypes of the LRT 1100-2.1 and LRT 1090-2.1 were built for testing, which is expected to continue until the middle of next year.An electrically extendible platform improves safe entry into the cab. Storage space includes a box at the front of the chassis and one on the side between the axles.There is room for an aluminum folding ladder behind the rear axle, and the design incorporate storage space for wooden or plastic outrigger pads. “Cummins was strongly demanded by the big operating companies of the main target market in North America,” Stöhr says. The front axle is mounted rigidly, and the rear axle is designed as a pendulum axle for pick-and-carry capabilities.Some customers liked the pin- and latch-style with higher load charts, while others preferred a full-power hydraulic boom with higher speed. The 110-ton LRT 1100-2.1 RT crane features a 164-ft.-long, five-section telescopic boom with the Telematik single-cylinder telescoping system that pushes out the boom sections independently with a single cylinder and pins it to the telescopic section above. “As the entire counterweight consists of one slab only, chances of an incorrect ballast arrangement are virtually impossible,” says Ulrich Hamme, managing director, construction and development for Liebherr-Werk Ehingen.
Operating the Telematik was simplified for operators, and only two telescopic modes—strong and long— are offered. The single-piece, 15.4-ton counterweight can be assembled and disassembled with a hydraulic ballasting cylinder, which is installed inside the front of the chassis and will be standard for the U. The 100-ton LRT 1090-2.1 has a 154-ft.-long telescopic boom, and its full-power boom consists of a two-stage hydraulic cylinder and a rope extension system, similar to Liebherr’s smaller LTM all-terrain cranes.It considered the size, price, boom length, boom system, technical requirements, and safety needs of crane owners in the United States and Canada.What the manufacturer came up with were two clean-slate-designed rough-terrain cranes.Regarding the power train, the two models feature a 264-hp Cummins 6.7-liter diesel engine that supplies 730 ft.-lbs. The cranes can be equipped with Tier 4-compliant engines for the U. The powershift transmission from Dana offers six forward speeds and two reverse. The LRT units also feature hydraulically actuated disc brakes, an innovation for mobile cranes.Large surface 29.5 R25 Yokohama tires are ideal for off-road performance.