Liebherr presents rough-terrain crane LRT 1090-2.1 at MINExpo in Las Vegas

Las Vegas (USA), 13 September 2021 - High safety levels in every respect were the main priority for the design of the Liebherr LRT 1090-2.1 rough-terrain crane. It features an outrigger monitoring system as standard. The support status, on tyres or outriggers, is detected automatically and saved to the crane controller. The attachment of the ballast to the turntable and the installation of the optional double folding jib including its angle adjustment are also recorded and monitored.

The VarioBase® variable support base developed by Liebherr, and fitted as standard on the LRT 1090-2.1, makes an important contribution to enhancing safety. VarioBase® allows each individual outrigger beam to be extended to arbitrary lengths. The crane work is controlled by the load moment limiter within the LICCON controller which calculates the maximum load capacities precisely for the current situation. This prevents accidents by human error during the assembly process and when hoisting loads. VarioBase® also provides greater flexibility on site. As a result of the increased lifting capacities when hoisting over the supports, the crane can hoist loads normally reserved for the next size crane class.

Safety is also enhanced by providing greater comfort for the crane operator. For example, the crane cabin is 220 mm / 8.5" wider than other standard cabins on the market. It can be tilted backwards to provide greater comfort when hoisting loads to great heights. Clear, self-explanatory controls make the crane easy to handle. They allow the crane operator to focus on the task at hand: working with the crane and the load. A cooler and USB charging socket are standard features in the cabin.

Ladders, a large number of handles, and an electrically extending platform on the cabin, ensure safe access to the crane. The LRT 1090-2.1 features a wide range of storage boxes for accessories, rigging equipment, and support timber as standard. There is also a storage facility for the crane hook.

Excellent off-road capacity and low cost global transport

The LRT 1090-2.1 is powerful and robust, has excellent off-road capability, and is also highly manoeuvrable. It is powered by a Cummins diesel engine which meets all current emissions regulations. The 201 kW / 270 hp engine supplies a maximum torque of 990 Nm / 730 lb-ft. A 6-speed powershift transmission from DANA and large 29.5 R25 tyres guarantee the required off-road capability for the crane. All-wheel and crab steering ensure easy handling and high manoeuvrability in constricted conditions.

The LRT 1090-2.1 measures 3.87 m / 12'8" in height and 3.3 m / 10'10" wide and is transported on public roads with a low loader. The crane’s curb weight is less than 121,000 lbs (55 tonnes) with complete equipment including ballast, or under 88,000 lbs (40 tonnes) without ballast and equipment, meaning the crane can be transported worldwide at low cost. The LRT 1090-2.1 can be readied for use quickly and is easy to assemble once onsite. The outrigger pads, which remain inside the width of the vehicle, contribute to this quick setup as they are not required to be removed for transport.

High lifting capacities with long telescopic boom

The LRT 1090-2.1 features a 47 m / 154 ft telescopic boom. Its telescoping system consists of a two-stage hydraulic cylinder with a rope extension mechanism. The boom can be extended easily with two telescoping modes: strong or long. The extension mechanism has been designed for high telescoping lifting capacities.

A second winch and the rooster sheave are included as standard on the basic machine for two-hook operation. As an option, a 10.5 - 19 m / 34.5 - 62 ft double folding jib can be installed on the telescopic boom. It can be attached at an angle of 0°, 20° or 40°.