Intermat '04.2015

Liebherr LTM 1250-5.1 '2015–pr.

Previous model – LTM 1220-5.2.

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  • Added by: Wheels&Tracks , 6 months ago
  • Date taken: 12.05.2015
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6 months ago
Wheels&Tracks

06/19/2015

Liebherr unveils a new 250-tonne mobile crane to visitors from all over the world at its 2015 customer days at the manufacturing plant in Ehingen. The LTM 1250-5.1 is now the most powerful mobile crane on 5 axles on the market. It is the third crane model on which Liebherr uses its innovative single-engine concept. In addition to a multi-functional folding jib, a 50m fixed jib is also available. The Liebherr innovations VarioBase® and ECOmode mean that crane operators can use the new LTM 1250-5.1 with even more safety and efficiency.

The LTM 1250-5.1 is the successor to the globalsuccess model LTM 1220-5.2. In the development of the new crane Liebherr followed the concept of achieving maximum load capacity from the available weight of a 5-axle mobile crane. The result is that the LTM 1250-5.1 is now the most powerful crane in its class in the world. Its load capacity has been increased compared to its predecessor by around 15% - 20% whilst the telescopic boom has remained at the same length of 60m. With lattice extensions the maximum hook height has been increased by a massive 9m to 110m.

Liebherr has a particularly wide and variable range of lattice jibs for the new LTM 1250-5.1. The 12.2m to 22m folding jib can be extended up to 36m with 7-metre sections. The folding jib is attached with a 0°, 22.5° or 45° inclination. As an option the folding jib can be supplied with a hydraulic adjustment system, which allows it to luff with a full load between 0° and 45°. The adapter section for the folding jib is used as a 5.4m erection jib. The pivot point for the folding jib can be raised using up to two straight 7m lattice sections acting as telescopic boom extensions.

The maximum ballast on the new LTM 1250-5.1 is 88t with a maximum width of 6.3m. The base plate weighing 1t and a 10-t ballast plate are the same width as the vehicle. With up to 68 tonnes of ballast the ballast width is 4.1m.

VarioBallast is a new feature for Liebherr. The LTM 1250-5.1 can be operated with two different ballast radii: 5.58m or 4.78m. Liebherr has designed a solution to adjust the ballast radius particularly quickly and easily. The ballast radius is reduced by 800mm using standard mechanically swivelling ballasting cylinders. This solution is a major benefit of the new 250-tonne model for use in constricted conditions.

A six-cylinder Liebherr diesel engine in the undercarriage which develops 400 kW / 544 bhp and torque of 2,516Nm, provides the LTM 1250-5.1 with all the power it needs. The engine meets the Stage IV / Tier 4f emissions regulations.

The power is transferred to the crane's axles by the 12-speed ZF-AS-Tronic gearbox. A two-stage distributor gear permits minimal creeper speeds in manoeuvring mode. The intarder, a zero wear hydrodynamic brake integrated in the gearbox, acts as a retarder. In addition a Telma eddy current brake is available as an option. Like almost all LTM mobile crane models, the LTM 1250-5.1 is fitted with pneumatic disc brakes. The rear axles on the new 250-tonner have active electro-hydraulic steering depending on the vehicles speed. This increases the manoeuvrability of the vehicle and drastically reduces tyre wear. Five steering programmes can be conveniently selected at the touch of a button.

https://www.liebherr.com

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