Liebherr has introduced the new LR 1700-1.0 crawler crane, which combines the benefits of economical transport of the 600t-class crawler cranes with the performance of a 750t-class lattice boom crane and also features all the innovations of Liebherr’s crawler crane developments from the last few years.
The company said in a statement that the design of the new LR 1700-1.0, which has a maximum lifting capacity of 700t, is based on its 600t predecessor, the LR 1600/2 crawler, which has seen over 200 units produced over 12 years now.
Liebherr says it has completely redesigned the base machine for the new LR 1700-1.0 based on the dimensions of the LR 1600/2. Its track width is slightly larger than its predecessor at 8.7m, while the length of the crawler carriers has grown to 11.35m. The LR 1700-1.0 is available with Quick Connection as an option. This means that the transport weight of the slewing platform (without the SA frame and winches) can be reduced to around 42t, well below the limit of 45t to ensure low cost heavy haulage. The same applies to the crawler carriers which, with their 2m crawler pads and four-fold drive, weigh in at just 43t. This guarantees that the new 700t crane can be transported at low cost.
The width of the various components is another important criterion for economic mobility and Liebherr said that here too, the LR 1700-1.0 has all the transport units for the base machine, including the pivot section, at no more than3m in width. Only the H lattice sections on the main boom are wider than this at 3.5m. However, these can be used to transport the smaller sections to reduce the number of transport vehicles required. For customers in countries where transport widths of over 3m are not possible, Liebherr can also supply the boom for the LR 1700-1.0 exclusively with 3m-wide lattice sections.
Operators of the LR 1600/2 is can also use a large number of equipment components from the predecessor crane for the new LR 1700-1.0. These include the S sections for the main boom, the luffing jib, the 600t head, several winches, hook blocks, ballast slabs and the runner.
The basis of the high performance of the new 700t crane is the new base machine, which delivers between 10-15% more lifting capacity. The 3.5m H lattice sections at the bottom of the main boom significantly improve the lateral stability of the entire system.
Liebherr says that this makes the new LR 1700-1.0 the new benchmark in the 600-750t class for lattice boom cranes both for classic industry work and also for wind power. The boom can be raised to a height of up to 198m, comprising the main boom at 102 and a luffing jib at 96m. These lattice sections enable the crane to be used in purely main boom mode with a length of up to 162m.
A Liebherr six-cylinder diesel engine which develops 544bhp is used to power the LR 1700-1.0. The engine satisfies the new stage V emissions directive and can also be configured to comply with the stage IIIA emissions regulations for countries in low regulated regions such as the Middle East.