Fahr KT 10 D
Built: 1952–1959 · Series: KT-Reihe
More machines from model year 1952
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Fahr KT 10 D: single-cylinder diesel light tractor from Gottmadingen with thermosiphon cooling, 10 hp and a weight of only 518 kg, built from 1952 to 1959
Fahr, the tractor and combine-harvester maker from Lake Constance, built the KT 10 D between 1952 and 1959 – during the reconstruction phase of West German farming, when many small and medium farms bought their own, affordable motorised tractor for the first time. The KT range covered the lower end of Fahr's line-up.
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The single-cylinder diesel engine of 502cc produces 10 hp at 2,200 rpm and is cooled by thermosiphon action without a water pump. At only 518 kg, 2,400 mm long, 1,030 mm high and 1,030 mm wide, the KT 10 D counts among the lightest farm tractors of its time; the top speed is 15 km/h.
At just over half a tonne, the KT 10 D was built for small plots and market gardens, not for heavy tillage. Thermosiphon cooling relies solely on the natural circulation of heated coolant without a pump, reducing the number of components and the maintenance effort compared with larger tractors – a deliberate trade-off in favour of simplicity and a low purchase price.
When buying such a light single-cylinder tractor second-hand, the patency of the thermosiphon cooling circuit matters most, as scale or rust deposits lead to overheating faster without a pump to assist circulation. Also worth checking are the injection pump and the compression of the single cylinder, and the light chassis for distortion, which is not uncommon after decades of use on small plots.
Sources: SpecCodex-Register: Kennwerte des Modells KT 10 D
Technical data
Engine
| Fuel | dieselcorrect |
|---|---|
| Power | 10 hpcorrect |
| Power | 10 hpcorrect |
| Rated speed | 2,200 rpmcorrect |
| Cylinders | 1correct |
| Displacement | 502 cm³correct |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 2,400 mmcorrect |
|---|---|
| Width | 1,030 mmcorrect |
| Height | 1,030 mmcorrect |
| Unladen weight | 518 kgcorrect |
Drivetrain and chassis
| Gearbox | 4/1, optional with creeper gear 5/1correct |
|---|---|
| Front tyres | 7.00-18correct |
| Top speed | 15 km/hcorrect |
Origin and approval
| Construction | unit construction (no separate frame)correct |
|---|---|
| Units built | 2886 inkl. Traktorenlexikon: Fahr KT 10 D|KT 10 Bcorrect |
Where this model stands
Power-to-weight ratio: 14.2 kW/t (7 kW / 0.5 t)
Power class: Compact (< 40 hp)
Stronger than 1% 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 Fahr KT 10 D have?
The Fahr KT 10 D delivers 10 hp.
How much does the Fahr KT 10 D weigh?
The unladen weight is 518 kg.
What engine does the Fahr KT 10 D have?
1 cylinders, 502 cm³ displacement, Diesel.
How fast does the Fahr KT 10 D go?
Top speed is 15 km/h.
What are the dimensions of the Fahr KT 10 D?
2,400 mm × 1,030 mm × 1,030 mm.
When was the Fahr KT 10 D built?
Production years: 1952–1959.
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 16 individual figures for this model. They come from 2 recorded sources; 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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Tractor in 3D section
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