Bolinder Munktell 30 series
4 models in this series
Bolinder-Munktell 30 series – BM-31 to BM-35/36 from Eskilstuna, 1950s: the Swedish three- and four-cylinder tractors before the Volvo era, 25 to 31 kW
Bolinder-Munktell was formed in 1932 in Eskilstuna, Sweden, from the merger of the machine works J. & C. G. Bolinder and Munktells; the 30 series with the BM-31, BM-32, BM-33/34 and BM-35/36 models belonged to the tractor programme of the 1950s, shortly before Volvo took a majority stake in Bolinder-Munktell in 1950 and gradually folded the brand into its own farm-equipment division.
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The register lists here 4 versions with 25 to 31.3 kW from three- and four-cylinder engines of 3,362 to 3,456 cm³ displacement, torque from 182 to 210 Nm at 1,500 to 1,800 rpm, unladen weights from 2,280 to 2,450 kg, lengths from 3,115 to 3,150 mm, widths from 1,690 to 1,839 mm and heights from 1,820 to 2,180 mm; the fuels recorded are paraffin, a paraffin/petrol blend and, on one model, diesel.
The 30 series was common on Swedish farms of the post-war years and marked the transition from the paraffin-fuelled pre-war tractors to the more modern diesel models that came to define Bolinder-Munktell and, later, Volvo BM and today's Valtra brand.
Used, the 30 series calls for checking engine condition and the carburettor or injection pump depending on fuel type, clutch and transmission, the cooling system, and the condition of sheet metal and tyres; parts are today offered mainly by Swedish and Nordic vintage-tractor specialists.
Sources: SpecCodex register, model data: Bolinder-Munktell 30er-Baureihe
Models compared
4 of 4 models.
| BM-311949–1957 | BM-321950–1957 | BM-33/BM-341950/52–1957 | BM-35/BM-361952–1959 | |
|---|---|---|---|---|
| Power | 25 kW | 28.7 kW | 26.8 kW | 31.3 kW |
| Rated speed | 1,500 rpm | 1,500 rpm | 1,500 rpm | 1,800 rpm |
| Cylinders | 4 | 4 | 4 | 3 |
| Displacement | 3,456 cm³ | 3,456 cm³ | 3,456 cm³ | 3,362 cm³ |
| Torque | 182 Nm | 210 Nm | 182 Nm | 206 Nm |
| Forward gears | 5 | 5 | – | – |
| Reverse gears | 1 | 1 | – | – |
| Top speed | 30 km/h | 30 km/h | 30 km/h | 30 km/h |
| Wheelbase | 1,960 mm | 1,960 mm | 2,010 mm | 1,960 mm |
| Length | 3,115 mm | 3,115 mm | 3,150 mm | 3,150 mm |
| Width | 1,839 mm | 1,839 mm | 1,690 mm | 1,690 mm |
| Height | 1,820 mm | 1,820 mm | 2,180 mm | 2,130 mm |
| Unladen weight | 2,295 kg | 2,295 kg | 2,280 kg | 2,450 kg |
Models
Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.
BM-31
The Bolinder Munktell BM-31 belongs to the 30er series. Production: 1949–1957. The engine delivers 34 hp (25 kW),...
BM-32
The Bolinder Munktell BM-32 is a model in the 30er series. Production: 1950–1957. The engine delivers 39 hp (28.7...
BM-33/BM-34
The BM-33/BM-34 from Bolinder Munktell is part of the 30er series. Production: 1950/52–1957. The engine delivers...
BM-35/BM-36
The 30er series from Bolinder Munktell includes the BM-35/BM-36. Production: 1952–1959. The engine delivers 42.5 hp...
