After 12 years and more than 200 units produced, the Liebherr LR 1600/2 crawler crane now has a successor.
Liebherr has unveiled the new LR 1700-1.0, featuring a maximum lifting capacity of 700 tonnes.
Liebherr 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 8.7 metres, while the length of the crawler carriers has grown to 11.35 metres.
The LR 1700-1.0 is available with Quick Connection as an option. This reduces the transport weight of the slewing platform (without the SA frame and winches) to about 42 tonnes to ensure low cost heavy haulage. The same applies to the crawler carriers which, with its 2 metre crawler pads and four-fold drive, weigh in at 43 tonnes. The width of the various components also aids in mobility. All transport units for the base machine of the LR 1700-1.0, including the pivot section, are no more than three metres in width. Only the H lattice sections on the main boom are wider than 3 metres, at 3.5 metres. However, these can be used to transport the smaller sections to reduce the number of transport vehicles required.
Where transport widths of more than three metres are not possible, Liebherr can supply the boom for the LR 1700-1.0 exclusively with three-metre-wide lattice sections.
To further reduce cost, the LR 1700-1.0 also shares numerous components with the LR 1600/2. These include the S sections for the main boom, the luffing jib, the 600 tonne head, several winches, hook blocks, ballast slabs and the runner.
The basis of the new 700 tonne crane is the new base machine, which delivers between 10 and 15 per cent more lifting capacity. Furthermore, the 3.5 metre H lattice sections at the bottom of the main boom significantly improve the lateral stability of the entire system. This means the new LR 1700-1.0 becomes the new benchmark in the 600 to 750 tonne class for lattice boom cranes, both for classic industry work as well as wind power.
The boom can be raised to a height of up to 198 metres, comprising the main boom at 102 metres and a luffing jib at 96 metres. The lattice sections enable the crane to be used in purely main boom mode with a length of up to 162 metres.
For erecting wind turbines, the LR 1700-1.0 can achieve a maximum main boom length of 165 metres using additional H sections. A fixed jib of up to 15 metres in length can be attached to this.
Minimal wear is becoming more important for moving the crawler travel gear, particularly at wind farm jobsites.
So, Liebherr’s engineers made the structural steelwork for the crawler carriers particularly robust and increased the size of the rollers. The four-fold drive for the travel gear is standard.
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A Liebherr six-cylinder diesel engine, which delivers 544 hp, is used to power the LR 1700-1.0.
The engine meets Stage V emissions standards and can be configured to comply with countries that have lower emissions requirements.
The V-frame and VarioTray are incorporated into the LR 1700-1.0. VarioTray is a small ballast pallet, which can be unbolted quickly and easily when necessary. This avoids the need for the tiresome stacking and unstacking of ballast slabs.
The V-frame ballast system is a hydraulically adjustable folding frame, which enables the ballast radius of the LR 1700-1.0 to be infinitely adjusted between 13 and 21 metres. A rigid ballast guide system is no longer required for large radii.
Liebherr has another innovation when it comes to ballast trailers – the new modular MWagon.
The ballast trailer is not only suitable for use with the LR 1700-1.0, but also with the LR 1800-1.0 and LR 11000 crawler cranes. Since ballast trailers are rarely used, this paves the way for significant savings. The LICCON2 control system takes charge of the sensitive control for circling, towing and parallel movements. It also delivers extended set-up facilities and monitored erection for the LR 1700-1.0.
The first LR 1700-1.0 models will be delivered around mid-2021, around the same time as the final LR 1600/2 units will be delivered. Deliveries of the LR 1750/2 will also cease after nearly 20 years of production, and the LR 1700-1.0 will assume its position below the 800 tonne LR 1800-1.0.