Liebherr has introduced its new six-axle mobile crane, the LTM 1400-6.1, equipped with a 70-m telescopic boom. This model is the successor to the LTM 1350-6.1, and features a significantly higher lifting capacity.
There are major differences to the predecessor model, particularly in terms of the assembly process for the Y-guying system. With just one self-assembly lift, the new LTM 1400-6.1 places the guying system on the chassis, where it is then pinned in place. The hydraulic quick coupling closes automatically when the boom is luffed down between the two Y-frames. The electrical connection is established with one final movement and the telescopic boom with Y-guying is ready for use in just a few minutes.
Various lattice jibs enable the LTM 1400-6.1 to work efficiently in a wide range of applications. The fixed lattice jib extends the telescopic boom by up to 45.5 m and can be mounted at an angle of 0°, 10°, 20° and 40°. As an option, the fixed jib can be adjusted between 0° and 40°. The luffing lattice jib, with a length ranging from 14 to 80.5 m, provides maximum height, radius and performance.
As with its predecessor, the available ballast for the new LTM 1400-6.1 includes 100 t of basic ballast and 40 t of additional ballast. The hydraulic ballasting device is integrated in the counterweight frame – ballast assembly is simple, quick and does not require an auxiliary crane. The VarioBallast system is fundamentally different to the one found on the predecessor model.
The 140 t of total ballast can now be set to a radius of 7.7 m to achieve the maximum lifting capacity. In confined spaces, the ballast radius can be reduced to 5.6 m. The counterweight plates are compatible with those found on other large Liebherr cranes – a major advantage for the crane operator in terms of both economy and logistics.
The variable VarioBase supporting system ensures greater versatility. Here too, Liebherr has come up with a new development: in addition to the option of using the predefined support positions with pinning options of 0%, 25%, 50%, 75% and 100%, the sliding beams can also be freely extended between 0% and 50%. Until now, this was only possible on mobile cranes with up to five axles.
Furthermore, the new LTM 1400-6.1 is powered by the Liebherr single-engine concept and a mechanical drive for the superstructure, which results in better economy. The eight-cylinder, 455-kW Liebherr diesel engine delivers 3,067 Nm of torque.
Liebherr has developed different driving conditions for worldwide, economical mobility. With an axle load of 12 t, the LTM 1400-6.1 with telescopic boom and detachable hook block has an overall length of 17.8 m. On the construction site, the 400-t machine can be driven with 10 t of ballast, a three-line hook block and Y-guying with an axle load of less than 16.5 t. Equipment can be removed for road journeys requiring lower axle loads.
Another new feature is the installation of various driver assistance systems to increase road safety, especially for vulnerable road users such as pedestrians and cyclists. For example, the Blind Spot Information System warns the crane driver when someone is in the vehicle’s blind spot, particularly when the crane is turning. The moving off information system also provides a visual and acoustic warning if someone is in front of the crane.
