Huber & Wösner MD 12-3
Built: 1956–1957 · Series: MD
More machines from model year 1956
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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
Technical data
Engine
| Fuel | dieselcorrect |
|---|---|
| Power | 12 hpcorrect |
| Rated speed | 2,000 rpmcorrect |
| Cylinders | 1correct |
| Displacement | 660 cm³correct |
| Cooling | air-cooledcorrect |
Dimensions and weights
| Wheelbase | 2,120 mmcorrect |
|---|---|
| Unladen weight | 800 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 4v/1rcorrect |
| Front tyres | 4.00-12correct |
| Rear tyres | 7.00-18correct |
| Top speed | 16 km/hcorrect |
Origin and approval
| Construction | Lastendreiradcorrect |
|---|---|
| Units built | 120correct |
Where this model stands
Power-to-weight ratio: 11 kW/t (9 kW / 0.8 t)
Power class: Compact (< 40 hp)
Stronger than 2% of the tractors in the register — out of 15,663 models with a stated power figure.
Calculated from the documented figures above — not a rating.
Frequently asked questions
How much power does the Huber & Wösner MD 12-3 have?
The Huber & Wösner MD 12-3 delivers 12 hp.
How much does the Huber & Wösner MD 12-3 weigh?
The unladen weight is 800 kg.
What engine does the Huber & Wösner MD 12-3 have?
1 cylinders, 660 cm³ displacement, Diesel.
How fast does the Huber & Wösner MD 12-3 go?
Top speed is 16 km/h.
When was the Huber & Wösner MD 12-3 built?
Production years: 1956–1957.
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Check the weights in the papers against the figures here — attachments change them.
- Check front and rear tyre sizes: mismatched pairs strain the drivetrain.
- Shift the gearbox cold and warm — jumps only show up at temperature.
- Load the hydraulics and watch for sag.
- Ask about parts availability for this build year — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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This page carries 15 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
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Sources: [1]
Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.