5 March 2007

A round-up of mobiles, crawlers and tower cranes from this German manufacturer

Liebherr LTM 11200.9

LTM 11200-9.1

The second biggest crane on Liebherr’s stand is the LTM 11200-9.1. With a maximum capacity of 1,200t, this newly developed nine-axle crane is not only, in Liebherr’s words, the most powerful telescopic crane in the world, it also surpasses all others with its eight-section 100m telescopic boom. The eight-part boom on this new flagship model is 16m longer than the previous record holder, the LTM 1500-8.1, which Liebherr launched at Bauma 1998.

The crane extends the boom to its full 100m length with its Telematik boom pinning system. Alternatively, a four-part ‘short’ telescopic boom can be used with the four inner telescopic parts dismounted. This principle has already proved itself on the LTM 1500-8.1, on which a boom length of 55m is achieved with the help of a 3m lattice head section. The crane has been particularly designed to erect 2-3 mW wind turbines. The crane can lift 100t machine housings 80m high.

The luffing fly jib can be extended to 126m and reaches lifting heights of up to 170m. The Y-shaped guying system on the telescopic boom, which can be used on either the four- or eight-part boom, enables the crane to be used for wind turbine erection.

The nine-axle LTM 11200-9.1 can be driven on public roads with a total weight of 108t, including all four outriggers and the complete slewing platform with both winches. The telescopic boom is carried on a separate transport vehicle. The crane carrier is powered by an eight-cylinder Liebherr turbo-diesel engine with an output of 500kW (680hp) at 1,900rpm. It produces an enormous torque of 3,000Nm at engine speeds of 1,100rpm–1,500 rpm.

The driveline features a 12-speed ZF TC-Tronic gearbox connected to a two-step transfer case. A torque converter is used to start driving and for manoeuvring.

LR 11350

LR 11350

The LR 11350 reaches its maximum 1,350-t load capacity on its 60m long main boom with derricking and ballast trailer at a radius of 12m. The maximum load moment of 22,748tm is reached with a working radius of 22m and a load capacity of 1,034t, likewise with ballast trailer.

The LR 11350 has a maximum boom length of 228m, using main boom and luffing fly jib, each 114m in length, for a maximum height under hook of 223m. Because of the conventional A-frame design principle, the LR 11350 can erect main booms up to 102m length, when mechanical outriggers are used, without the need for a derrick. With derrick system, main boom lengths of up to 150m are possible.

A Liebherr ballast trailer with stepless hydraulic radius adjustment (15m to 30m) is available for the 42m derrick boom. Derrick ballast weighing up to 660t with a radius of 30m is used in this instance.

No section exceeds the transport width of 3.5m or the transport weight of 45t. For the crawler carriers to arrive at this weight, the crawler tracks are removed. A six-cylinder Cummins diesel engine delivers 640kW (870hp). Up to six winches can be used for installation purposes and hoisting work. The hoist winches have a rope diameter of 38mm and operate at a line pull of 310kN. The hook block for load capacities of up to 1,350t has a modular design and consists of a hook and four roller blocks.

LR 1300

With a main boom and adjustable luffing jib, the new 300t capacity LR 1300 has a maximum boom length of 172m (59m main boom plus 113m luffing jib). Using the high reach attachment variant, the jib can be extended to a length of 120m. A derrick attachment with ballast trailer is offered for heavy loads. Also, using the innovative attachment variant known as ‘midfall’, it is possible to guide the rope either over the main boom head as usual or over a pulley mounted in a fixed position in the luffing jib. The LR 1300 is powered by a 450kW (12hp) Liebherr diesel engine and two crane winches, each with a pulling force of 15t for high rope speeds. Crane components measure 3m in their longest dimension.

LTM 1050-3.1

The new LTM 1050-3.1 Liebherr mobile crane replaces the LTM 1045-3.1. It has a 38m telescopic boom, 4m longer than its predecessor. At a 12t axle load, the overall weight of 36t includes the biparted swing-away jib, 5.8t of ballast, 16.00 tyres, an eddy-current brake, a 6 x 6 driveline and the hook block.

The 38m telescopic boom comprises the base section and three telescopic parts, which can be slid in and out in sync using a hydro-mechanical telescoping system. A single-stage, double-acting hydraulic ram and a twin pulley block move the boom steplessly and rapidly to any length required. The large telescopic ram and the length-dependent hydraulic pressure control ensure high telescoping load capacities. The folding fly-jib, which as a single jib is 9m long and as a biparted swing-away jib measures 16m, can be mounted at inclinations of 0°, 20°, 40° and 60°.

The new three-axle crane is driven by a Liebherr six-cylinder in-line engine, which produces an output of 270kW (367hp) at 2,000rpm and a torque of 1,720Nm at 1,300rpm. The engine meets all the necessary emissions requirements of the new guidelines, complying with Stage III/Tier III. The ZF 12-speed AS-Tronic gearbox includes automatic shifting and dry clutch. The two-step transfer case also enables minimal creeping speeds as low as 0.55kph. This is necessary for delicate manoeuvring work.

The chassis on the LTM 1050-3.1 is 9.11m long and, measured above the driver’s cab, has a turning radius of 7.84m. The vehicle is 2.55m wide, irrespective of whether it has 14.00 R 25 or 16.00 R 25 tyres.

Liebherr 22HM

22 HM

With its new mobile 22 HM fast-erecting crane, Liebherr is offering a larger version of the 13 HM fast-erecting crane introduced back in 2002. The 22 HM is also aimed at users from the building trade, carpentry, timber construction and the prefab industry, where there is a demand for even bigger mobile fast-erecting cranes. Despite its compact size, the 22 HM is highly functional. Its redesigned undercarriage with integrated tandem and trailing steering axles offers maximum mobility. The new undercarriage steering is set to establish new standards in manoeuvring on tight construction sites. A ‘super-raised’ jib working angle is unique and enables a hook height of 33.4m. The maximum radius of the 22 HM is 27m and its maximum load capacity is 2,000kg.

With a new steering system, the new 22 HM can be towed either with a drawbar or a fifth-wheel mount and can be transported on a three-axle truck at speeds of up to 80kph.

Liebherr derrick 200 DR 5-10

200 DR 5-10

Liebherr’s new 200 DR 5-10 derrick crane (Cranes Today December 2006 p 15), is a special luffing jib crane for dismantling tower cranes from tall buildings

The maximum radius of the 200 DR 5-10 can be set to 20m or 25m as required. Using a jib for a maximum radius of 20m, loads of 10t can be hoisted in double-reeved operation across the whole radial area. The jib used for a 25m radius can hoist 7.5t at the tip, and at the point of inflection of its load curve can hoist 10t at a radius of 19m. This ensures that the crane can also lower heavy parts from great heights whilst preserving a safe gap between them and the building.

Liebherr HS 895 HD

HS 895 HD

Liebherr is presenting a special variant of its 200t capacity HS 895 HD duty-cycle crawler crane designed for particularly tough operations.

For its size, the new special HS 895 HD Litronic model is a powerful machine, driven by a 670kW (912hp) 12-cylinder diesel engine. The scraping winch has a pulling force of 45t.

Other features include a more robust steel superstructure, a stronger fairlead design and a modified boom foot.

EC-B series

The EC-B flat-top cranes, which have no tower head and were unveiled by Liebherr last year as an entirely new series, comprise 14 different models at regular size intervals from 50m–200m. The model series is rounded off at the top by the 280 EC-B 12 Litronic, which actually comes from the previous generation of Liebherr topless cranes. Over 600 EC-B cranes have already been dispatched. At Bauma 2007, the 71 EC-B 5 and the 200 EC-B 10 Litronic will be shown. These cranes can fit in standard containers, and the boom head can be raised in a single lift out of a truck without repositioning, Liebherr says. There is also a new pinned jib attachment system.