This gave a 140 horsepower (hk) four-wheel-drive machine with enormous tractive effort. The BM 471 Bison was BM’s first true four-wheel-drive tractor. It weighed 3 720 kg without the safety frame. The 471 did not turn out to be a major seller, but around fifty were made during 1962-63.
The 470 Bison was also used to pull dumper trailers. This symbolizes the development from red tractor to yellow construction machines which began at that time. Even so, many more tractors would leave the Eskilstuna factory.
The Bison was also used as platform for the production of both industrial tractors (470 I) and forestry machines.
In the new designation system, the successor to the Bison was called T 800.