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Hands-on forest owners can switch from forwarder to harvester

Swedish forest equipment manufacturer Hypro AB is known for its tractor-mounted processors. But at the SkogsElmia 2019 forestry fair in Bratteborg, Sweden, the company presented a complete machine system, consisting of a control and measuring system that serves both an advanced timber trailer and a trailer with a two-grip harvester head. Just swap out the trailers and your agricultural tractor switches from a forwarder to a harvester.

The forwarder trailer loads 14 tonnes and has a crane with a 9.4-metre reach. In harvester mode, the trailer is equipped with a crane, grapple saw and processor (shown on a display frame in the centre).

Forest owners who manage and sometimes also harvest their own forests are making ever-higher demands and expect contractors not to disrupt their woodlands more than absolutely necessary.

Demand is growing for professional small-scale technology, said Linus Bergman from Hypro.

The harvester trailer is equipped with a crane with a grapple saw, to fell and move the tree stems. There is also a processor that delimbs and bucks. The combination acts as a two-grip harvester, which was a common type of machine in professional forestry until the 1990s when single-grip harvesters took over.

The forwarder trailer is called “HV14” and has a load capacity of 14 tonnes. It now comes equipped with a more powerful and longer crane with a 9.4-metre reach. Both trailers are controlled by the same system, developed by Hypro using hardware by Danfoss.

The software is adapted for DIY forest owners but has many of the functions found on large forest machines, Bergman explained.

Demand has increased strongly in recent times. Outside Sweden, the customers are mainly professional contractors but in Sweden, they are evenly split between DIY forest owners and contractors. The reason behind the demand, says Bergman, is that private forest owners want smaller lighter machines that reduce the risk of damage in their woods.

Linus Bergman giving a sneak preview of Hypro’s coming control and measuring system (photo courtesy Elmia).

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