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This crawler dozer was used by the Swedish Air Force for airfield maintenance and construction and for road building. Some were used in the peat bogs of Skåne in the south of Sweden to dig peat for the Fuel Comission, the body in charge of Sweden's fuel supplies during the Second World War.
At the start of the Second World War in 1940 the Swedish Air Force ordered crawler dozers from Bolinder-Munktell. Production began immediately and by the end of the war, 90 of these construction machines had been produced. It's hard to tell, but fundamentally the crawler dozer is a BM tractor. The hood is no longer, to make space for the six-cylinder petrol engine.
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Bolinder-Munktell crawler dozer 4 AF
Engine Volvo 6-cyl 4-stroke petrol
Engine output 45 hp
Gearbox 4 forward speeds, 1 reverse
Cylinder volume 4,4 dm³
Weight 3 500 kg
Ground pressure 0,35 kp/cm²