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Liebherr introduces LTM 1110-5.1 - cost-effective transport with 60-metre telescopic boom

Liebherr unveils the five-axle LTM 1110-5.1 at the Bauma.
Liebherr unveils the five-axle LTM 1110-5.1 at the Bauma.

High load capacities with a long telescopic boom together with excellent global mobility are the main features of the new LTM 1110- 5.1 unveiled by Liebherr at Bauma. The new 5-axle crane achieves axle loads of 12 tonnes with 13.1 tonnes of ballast, but can also be driven with a gross weight of less than 48 tonnes with a maximum axle load of 10 tonnes. With its maximum ballast of 28.7 tonnes, it remains below an axle load of 15.5 tonnes. A quick-change system for the ballast slabs ensures maximum flexibility for modifications. The variable support base VarioBase delivers particularly high load capacities with its widened rear supports. Liebherr calls it VarioBasePlus.

High level performance and mobility

The demands for the design of Liebherr's new 5-axle crane in the lower load capacity range were high and, in part, contradictory. On the one hand, a low gross weight and therefore a high level of mobility had to be ensured whilst on the other, the target was to achieve the highest possible load capacities with a long telescopic boom. The result is that although the new LTM 1110-5.1 is such a lightweight construction that it achieves a gross weight of 48 tonnes with axle loads of less than 10 tonnes, its 60 metre telescopic boom and maximum ballast of just 28.7 tonnes enable it to rival the performance of similar mobile cranes on the market. Even in countries where mobile cranes with a 12- tonne axle load are permitted on the roads, crane operators have for some time been demanding cranes which can be driven with 10 tonnes per axle by simply removing the ballast. This version delivers major benefits for road licensing and route approval procedures.

The ability to carry up to 13.1 tonnes of counterweights with an axle weight of 12 tonnes is an outstanding value for a 5-axle crane. It means that crane operators can complete the vast majority of crane jobs at low cost without having to transport additional ballast. Furthermore, the optional VarioBase generates a significant gain in load capacity in the zones above the supports. The Liebherr engineers went a step further with the new 110 tonne crane - the rear supports have a double-stage design and achieve a support width of 8.3 metres, 1.3 metres wider than the front supports. This increases the capacity over the rear supports even more. Liebherr calls the combination of the trapezoidal and variable support base VarioBasePlus.

With a length of 60 metres, the telescopic boom on the LTM 1110-5.1 is one of the longest in its crane class. In addition, a 10.8 to 19-metre folding jib is available which, as an option, can also be adjusted hydraulically between 0° and 40°. Two 7 metre lattice sections can also be installed to extend the telescopic boom to achieve the maximum hook height. This means that the new 110 tonne mobile crane achieves the same system length as the LTM 1130-5.1. A 2.9 metre erection jib and a runner, which can be swung to the side, round off the equipment list.

A six-cylinder Liebherr diesel engine in the undercarriage which develops 400 kW / 544 bhp and torque of 2,516 Nm provides the LTM 1110-5.1 with all the power it needs. The engine satisfies the new stage V emissions directive and can also be built to comply with the regulations which apply in countries outside of Europe, for example Tier 4f for the USA or stage III for low regulated countries.

The new ZF-TraXon gearbox is used to transmit the power to the crane's axles. As with its predecessor, the AS-Tronic, the 12 gears are changed automatically. ECOdrive is a new feature. The additional eco mode delivers enhanced drive properties which both save fuel and reduce noise. Meanwhile, Hillstart Aid makes starting on gradients easier.

The "DynamicPerform" version of the TraXon gearbox with an oil-cooled multi-disc clutch is used in the new LTM 1110-5.1, its first outing on a mobile crane. This delivers improved starting and manoeuvring at a level similar to that of a gearbox with a torque converter. Liebherr supported ZF in the development of the TraXon DynamicPerform and its integration in the drivetrain of mobile cranes.

Liebherr has continued its single-engine strategy on the new LTM 1110-5.1 with a mechanical driving unit for the superstructure. The weight reduction created by the elimination of the superstructure engine from the predecessor models has been used to deliver a longer boom and more ballast with an axle load of 12 tonnes.

In keeping with the latest developments from the Liebherr mobile crane series, the new LTM 1110-5.1 also features ECOmode for crane operations to reduce fuel consumption and noise emissions. On the one hand, the complete pump drive can be disconnected automatically when the engine is idling and then reconnected by the intelligent controller in a matter of seconds when it is required. On the other, the crane controller calculates the perfect engine speed for the working speed selected using the control lever to avoid unnecessarily high engine speeds. This results in fuel consumption being reduced by up to 10 percent during crane operations.

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