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Field of application 

 

The BM 20 was the agricultural tractor of its day for medium-sized and large farms. It was powerful enough to pull a three-furrow 12-inch plough in moderate compacted soil. The BM 20 could also handle the towed smack threshers that became very popular after the war. With its rubber tires, higher travel speeds and better brakes, the power-packed BM 20 was also used for towing in forestry and for road haulage.

 

Background

 

Collaboration between Munktell Volvo had been going on since the early 1940s. The jointly developed gearbox formed the basis of the new BM 20 and Volvo T 43. The engine in the BM 20 was based on the engine in its predecessors BM 2 and BM 3. In the Volvo version the tractor was first given a carburettor engine and then a Volvo Hesselman engine. The BM 20 was fitted with electric heating coils for heating the hot bulbs and electric starter motor or compressed air starting. 3 400 tractors were made between 1944 and 1951. The guide price in 1951 was 13 110 SEK. The tractor on display was made in 1950 and has number 16854. The first owner was John Olsson in Oppala north of Gävle in Sweden and the tractor was delivered to the customer on October 9 1950. The tractor was equipped with compressed air starting rubber tires, power take off, belt pulley and drive wheel brake. The tractor was earlier exhibited in the Munktell Arena. 

Munktell BM-20

Introduced                                            1944

Engine                                                    2-cyl, 2-stroke hot bulb engine

Engine output                                       41 hp, 1 050 r/min

Gearbox/speed                                     2 forward, top speed 20,5 km/h
                                                                1 reverse, top speed 3,0 km/h

Fuel tank                                                75 L

Cooling system                                     22 L

Weight                                                    2 650 kg