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24 ENGINEERING • UNIMOG 2 • 2010 Flexible, manoeuvrable, agile – thanks to all-wheel steering Handling any bend with all-wheel steering: auxiliary rear axle steering makes the Unimog even more adaptable and manoeuvrable. Three practical examples. 59 METRES ABOVE NORMAL ZERO. 10 o’clock in the morning in a forest clearing 40 kilometres south of Potsdam. A heavy machine is parked on the cycle path. A prototype: the U 400 with all-wheel steering and a 3600 millimetre wheelbase. Mounted on its right-hand side is a special unit designed for root barrier cutting – the WSF 800. The machine is on operations for gardening and landscaping company Feind based in Lübben. The aim of the work is to protect the asphalt, which has already been pushed up by roots at many points, against further destruction. The WSF 800 was developed by Feind in conjunction with construction machinery company AS Baugeräte. Accessing the location through rough terrain and working on the narrow cycle paths with no side surfacing demands the right tools. And in that respect company proprietor Reinhardt Feind swears by the Unimog – and has been doing so for the last 20 years. “We have been relying on Unimog since the company was founded back in 1990. We have the full range in our fleet, from the U 2100 to the U 500,” he goes on. It is a relationship of trust which remains on a firm foundation to this day. Or on 24 wheels, to be precise. Because the R. Feind gardening and landscaping business operates six Unimog as part of its basic portfolio. The sixcylinder, 231 hp engine of the U 400 with all-wheel steering emits a reassuring brumming noise as its rotating cutter neatly chops away the roots. In the same pass it lays down a root-barrier membrane and then back-fills and seals the trench it has made. The company boss is particularly proud of this U 400. Its steerable rear axle is what made it possible to do today’s job in the first place. “This is the first instance of a U 400 with this special equipment configuration on cutting operations,” he reports. Round the bend with the cutter “The particularly tricky part about using this vehicle was cutting round bends,” the head of the root barrier department at Feind, Norman Fruth, recalls. The cutter disk mounted on the right-hand side of the vehicle parallel to the direction of travel at a height of 50 centimetres above the ground must be guided smoothly round bends. That is the only way to ü
UNIMOG 2 • 2010 • ENGINEERING 25 On narrow, winding cycle paths the all-wheel steering of the U 400 operated by gardening and landscaping company R. Feind is very practical for root-barrier cutting.
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