New all-terrain Doosan excavator active in Germany

Published 7/3 at 16:45

A new 22t Doosan DX225LC-5 crawler excavator has been converted into an ‘all-terrain’ machine for contracts being carried out in the Wadden Sea, by German company, Sven Jacobs Tief-Garten-und Landschaftsbau. The conversion of the excavator, supplied by local Doosan dealer, Atlas Hamburg GmbH, was completed by Olko-Maschinentechnik GmbH from Olfen (NRW).

The main work area for the new excavator is the 11.3km long Hindenburgdamm embankment, which connects the island of Sylt with the mainland of Germany, with around 8.1km of the embankment running through the Wadden Sea. To prevent the standard Doosan 22t excavator from sinking into the water, a particularly low ground pressure is required. For this purpose, Jens Mewes, from Atlas Hamburg, who has been working with the Jacobs company for four years, contacted Olko-Maschinentechnik to carry out the conversion needed. Olko has remounted the superstructure of the DX225LC-5 on an all-terrain undercarriage to ensure full manoeuvrability of the excavator.

Jacobs has been using Doosan excavators since 2014, and the new machine is the fifth Doosan crawler excavator purchased. The DX225LC-5 features the same new distinctive engine design that characterizes all the excavators in the latest Doosan LC-5 generation, and is powered by the proven water cooled Doosan 6cylinder DL06P turbo charged diesel engine that delivers 124kW at 1800rpm. 

The Olko undercarriage itself has been designed for difficult applications in adverse conditions and on challenging surfaces, such as those found in, for example, wetlands, as well as performing environmentally friendly work in sensitive environments. It also makes it possible to carry out work on lakes, rivers and coastal areas. The type U/1800 undercarriage used on the DX225LC-5 has a length of 10.8m, width of 6.2m and a height of 2.35m. The undercarriage alone weighs around 27t and produces a buoyancy of 580 kN. It achieves a load capacity of 18t and a maximum speed of 4 km/h.

In addition to the conversion of the chassis, a number of other modifications were made by Olko. This included fitting the crawler excavator with a 9m boom and a dipper stick 6m in length. The extended reach makes it possible to work underwater without any problems. In addition, a supplementary fuel tank and a shelf for an anchor were installed. In order to comply with environmental regulations, the machine was converted to biodegradable Panolin hydraulic oil. Olko ensured that the finished machine is certified with the CE mark and accompanied by the documentation required by the EU Machinery Directive.

Supplying the standard excavator to be converted by Olko was Atlas Hamburg GmbH, which is part of the Wehl Group, and since 2012, it has been the Doosan dealer for the areas of Hamburg, Northern Lower Saxony and Schleswig-Holstein. Olko-Maschinentechnik GmbH itself has been one of the driving forces in the field of shaft construction and conveying technology, concentrating on all-terrain machines as a niche segment of the construction machinery market.

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