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Tohr 987S Harvester in Bennachie Forest
Forestry Memories
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No: 2898   Contributor: Norman Davidson   Year: 1990
Tohr 987S Harvester in Bennachie Forest

Images courtesy of Tom Dunn, Forestry Commission Operations Supervisor based at Huntly.

Tom does not remember this machine but believes it was on trial as a thinning machine at Bennachie for a short period. It was about this time that a variety of harvesting machines were trialled for thinning in the Forestry Commission areas of Aberdeenshire due to the increasing difficulties in retaining felling contractors due to the rise of the better paid jobs in the oil, gas and related industries.

The PDF shows more views of the felling head which looks large in comparison with the base machine. Note the Jonsered crane assembly with a short extension boom housed in the end segment. The felling head appears to have had a stump spraying facility for covering the felled stump with a urea water mixture as a protection against a butt rot fungus.

Can anyone remember this machine, its origins, the owner and where it was based?
Picture added on 22 February 2015
add commentComments:
The Tohr machines were promoted by an agent near Perth, and one went to Aberdeenshire contractor Alf Roberts and worked for some time near Aberfoyle. They had the ability to self-level both fore and aft, and side to side, as each wheel assembly was mounted on a pivoting arm moved up or down by a hydraulic ram - the hoses for the wheel nearest the camera can be seen in the yellow hose wrap.

Added by David Shearer on 22 May 2015.
This machine was build the first time of a man from Sweden in 1987. His name was Tor Helge Rodstrøm. In 1989 a company in Norway (Forest Machine Technology in Oslo) buy it from Sunne Machine Tecnick in Sweden. The F.M.T was bankrupt in 1995, and all the spareparts was sold to Company Norske Skog. After that, I don't know anything more. I was working at F.M.T from 1989 to the end of the Company in 1995. Sorry for my bad English.

Added by J.A. on 06 October 2015.
Thank you JA for your very welcome information on the origin of the Tohr machines. The history of the early timber harvesting machines is a very interesting one and little is written on them.

Added by Norman Davidson on 07 October 2015.
We did some work on a Tohr harvester for Sir Robert McAlpine in 1996, pumps, flow dividers and wheel motors were overhauled in a shed in Manchester

Added by D McCutcheon on 16 May 2017.
The latest info about Tohr 987s and SMT/FMT harvest heads. The leftovers (patents, drawings and some spare parts) now owned by private person in middle of southern Norway. He still has complete more or less orginal Tohr 987s and all 3 sizes of harvest heads made. The machine hasn't been working for several years but still in working condition - I think!!

Added by on 30 April 2018.
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