Both models feature 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 as standard on the new LRT cranes enhances 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.
Safety is also enhanced by improving crane operator comfort. For example, the crane cabin is 220mm wider than other standard cabins on the market and 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.
There are ladders, a large number of handles and an electrically extending platform on the cabin to ensure safe access. The new LRT cranes feature a wide range of storage boxes for accessories, rigging equipment and support timber as standard. They also have a storage facility for the crane hook.
The two new models will be launched as the first mobile cranes that meet global safety standards and comply with all global regulations such as the US standard ANSI B30.5, The European EN 13000, Australian Standards (AS) and the Russian GOST standard. Both models are powered by a CUMMINS diesel engine, which meets all current emissions regulations. The engine develops 194kW (264bhp) and supplies a maximum torque of 990Nm (730lb-ft). A six-speed powershift transmission from DANA and large 29.5 R25 tyres guarantee the required off-road capability. Their maximum speed is 25km/h (15mph) and allwheel and crab steering ensure easy handling and high manoeuvrability in constricted conditions.
The LRT cranes measure 3.87m in height and 3.3m in width and are transported on public roads with a low loader. Their curb weight is less than 55t with complete equipment including ballast, or under 40t without ballast and equipment. Both models are easy to assemble once they have reached the site.
The 100t LRT 1100-2.1 has a 50m 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. This system is simple and user-friendly as excellent lifting capacities over the entire radius range can be achieved with just two telescoping modes, Strong or Long. 14t of counterweights ensure high stability. The lifting capacity of the LRT 1100-2.1 is around 15% higher than that of the 90t model, which features 12t of counterweights. The LRT 1090-2.1 features a 47m telescopic boom. Its telescoping system consists of a two-stage hydraulic cylinder with a rope extension mechanism. Like the 100t model the boom can be extended easily with two telescoping modes, Strong or Long. The extension mechanism on both crane models has been designed for high telescoping lifting capacities. Liebherr will also exhibit the LTM 1450-8.1 mobile crane it showcased at Bauma last year. The new crane has a maximum load capacity of 450t and features a powerful 85m telescopic boom.
In the design of the LTM 1450- 8.1, Liebherr focused on economy and simple set-up on site. This has resulted in the new eight-axle crane being capable of travelling on public roads with a 12t axle load including its complete telescopic boom and all supports. This means that it can be quickly prepared for use once it reaches the site.
The new crane has a facility to work with a variable ballast radius. The VarioBallast enables the ballast radius to be reduced with infinite adjustment from 7m to 5m using a simple hydraulic system, a feature which is very practical on constricted sites.
When it is fully extended to 85m the telescopic boom can hoist 20t, making it ideal for erecting large tower cranes and for work in refineries and chemical plants. The crane delivers outstanding load capacities with large radii and also for heavyweight hoists with a small radius, which enables it to carry out 500t class work in many cases.
A range of lattice jibs enables it to work efficiently in a wide range of applications. With a folding jib from 7-35m in length, the telescopic boom can be extended easily and quickly.
The folding jib is attached below a 0°, 10°, 20° or 40° angle and in this configuration the crane is ideal for wind turbine maintenance work. Even greater hoist heights and load capacities can be achieved using the fixed lattice jib. It can be erected from 7-56m and can also be attached at an angle of 0°, 10°, 20° or 40°. The luffing lattice jib with a length of 14-84m delivers maximum height, radius and performance.
At 85m the eight-axle crane features the longest telescopic boom in the world that can be carried on public roads with a 12t axle load. All four supports, the 16 size tyres, the hoist winch, 16×8 drive, retarder and Telma eddy current brake are included in this. To support worldwide mobility, a wide variety of transport weights and axle load versions were included in the design. Liebherr has developed practical solutions both for countries with reduced axle loads and gross weights as well as for regions where more than 12 tonnes per axle are permitted.
The new mobile crane has been designed to deliver high economy and simple set-up on site. The crane cab is to the side of the boom and does not have to be swung from the driving position at the rear to the working position at the side.
Liebherr has deliberately not used telescopic boom guying so as to reduce set-up times and purchasing costs. The LTM 1450-8.1 has been designed to complete hoisting work flexibly and quickly so that two different jobs per day are easily possible. For a wide range of work, the crane can operate with just one additional transport vehicle to carry attachment equipment, support plates and adequate ballast.
An eight-cylinder Liebherr diesel engine in the undercarriage develops 505 kW/687bhp and torque of 3,160Nm. The engine meets the emissions regulations for Stage IV/Tier 4f and is also available in a Stage III version for threshold countries.
The power is transferred to the crane axles via the 12-speed ZF-TC Tronic gearbox. A torque converter ensures perfect manoeuvring. The intarder, a zero wear hydrodynamic brake integrated in the gearbox, acts as a retarder. In addition a Telma eddy current brake is available. All the rear axles have active electro-hydraulic steering depending on the vehicle speed.
This increases the manoeuvrability of the vehicle and drastically reduces tyre wear. Five steering programmes can be selected at the touch of a button and there is no need to raise the centre axles in crab speed.
The LTM 1450-8.1 features the Liebherr single-engine concept.
