The new LTM 1090-4.2 by Liebherr

Liebherr unveils an economical all-rounder on four axles: the new LTM 1090-4.2 mobile crane combines mobility, performance and economy in a superb package. The new 90-tonne crane from Liebherr is

Liebherr unveils an economical all-rounder on four axles: the new LTM 1090-4.2 mobile crane combines mobility, performance and economy in a superb package. The new 90-tonne crane from Liebherr is suitable for global mobility as it can travel with an axle load of 10 tonnes, 12 tonnes and 16 tonnes. It features a 60-metre telescopic boom, a whole 10 metres more than its predecessor, the LTM 1090-4.1. The new crane carries 8.8 tonnes of ballast with a 12-tonne axle load, 2.1 tonnes more than its predecessor. In this configuration the LTM 1090-4.2 is now the most powerful 4-axle crane on the market. ECOdrive and ECOmode make the new 90-tonne crane particularly green with lower fuel consumption and noise emissions. Liebherr innovations VarioBallast and VarioBase also deliver improved performance, flexibility and safety for this new crane model.

The development of the new LTM 1090-4.2 focused on meeting a very wide range of axle load requirements to enable the crane to deliver low cost global mobility. 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.

A six-cylinder Liebherr diesel engine in the undercarriage which develops 330 kW / 449 bhp and torque of 2,335 Nm provides the LTM 1090-4.2 with all the power it needs. The engine meets the Stage IV / Tier 4f emissions regulations. Liebherr can also supply the engine in an ECE-R.96 version (which corresponds to Stage IIIa) for countries with less stringent emission regulations. 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 add-on eco mode defines enhanced drive properties which save fuel and reduce noise.

Liebherr has continued its single-engine strategy on the new LTM 1090-4.2. The omitted weight created by the elimination of the superstructure engine from the predecessor model 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 1090-4.2 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% during crane operations.