Huber & Wösner MD
1 model in this series
Huber & Wösner MD 12-3: air-cooled single-cylinder diesel compact tractor from the MD series with 660 cc displacement, 12 hp output and 800 kg weight, built 1956 to 1957
The MD 12-3 from Huber & Wösner was built between 1956 and 1957, at a time when numerous smaller German workshops offered simple field tractors for farms that did not need, or could not afford, a large tractor. The designation MD 12-3 refers to one model within this small, early postwar product range.
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The air-cooled single-cylinder diesel engine of 660 cc delivers 12 hp at 2,000 rpm. At a weight of 800 kg and a wheelbase of 2,120 mm, the MD 12-3 reaches a top speed of 16 km/h, a figure typical of small diesel tractors of its era.
Air cooling made the engine largely immune to frost and did away with coolant, a radiator and a water pump as possible sources of wear. A single-cylinder diesel this light and air-cooled was built for small farms, for basic tillage and driving simple mounted implements such as mowers or small trailers, not for heavy draught work.
When buying such an old and rare model, the condition of the cooling fins on the cylinder, compression and starting behaviour of the single-cylinder diesel, and rust on the frame and sheet-metal parts all matter. The clutch, gearbox and brakes should also be checked for wear. Spare parts for such a small 1950s manufacturer can now practically only be found through collectors of historic agricultural machinery and specialist restorers.
Sources: SpecCodex-Register: Kennwerte des Modells Huber & Wösner MD 12-3
Models
Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.