Deutz MTH 122
Built: 1924–1925 · Series: MTH
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Deutz MTH – the 1930s Cologne farm tractor: MTH 122 to MTH 322, single-cylinder multi-fuel engines running at 600 rpm, 2,600 to 3,000 kg weight
Deutz, descended from the Motorenfabrik Deutz founded in Cologne-Deutz in 1864, brought the MTH range to market in the 1930s as a simple farm tractor for small and medium-sized holdings. This page covers the three versions MTH 122, MTH 222 and MTH 322, whose three-digit type number distinguishes the models within the range. Characteristic of the MTH tractors was the horizontal single-cylinder engine, which ran at low speed and was designed to run on different fuels – a multi-fuel concept that let interwar farmers use whatever fuel was cheapest and available.
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The register lists 3 versions here with 10.2 kW or 14 hp rated output from a single cylinder of 2,861 to 3,861 cc displacement, at a constant rated speed of 600 rpm. Kerb weight ranges from 2,600 to 3,000 kg, and PTO output is recorded at 14 hp. Two of the models run on multi-fuel, one on diesel.
Tractors of this type marked the transition from draught animals to motorisation on smaller and medium-sized farms and competed with similarly conceived single-cylinder tractors from other German makers of the period. The slow-running single cylinder delivered high torque with low wear and was robust enough for hard daily field work, even though travel speed remained low.
When buying a used MTH, check the condition of the cylinder head and pistons, the tightness of the fuel system in multi-fuel operation, wear on the crankshaft and bearings, and corrosion on the frame and mudguards after decades of use or storage. Spare parts for these early Deutz ranges are mainly available today through specialist vintage-tractor dealers and tractor clubs; factory support no longer exists.
Sources: SpecCodex register, model data: Deutz MTH, Deutz-Fahr (Nachfolgemarke)
Technical data
Engine
| Fuel | Vielstoffcorrect |
|---|---|
| Power | 14 hp (10.2 kW)correct |
| Rated speed | 600 rpmcorrect |
| Cylinders | 1correct |
| Displacement | 3,861 cm³correct |
| Bore | 135 mmcorrect |
| Stroke | 200 mmcorrect |
| Cooling | evaporative coolingcorrect |
Dimensions and weights
| Wheelbase | 1,300 mmcorrect |
|---|---|
| Unladen weight | 2,600 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 1V/1Rcorrect |
| Forward gears | 1correct |
| Reverse gears | 1correct |
| Front tyres | 720 x 120correct |
| Rear tyres | 1.060 x 140correct |
| Top speed | 5.75 km/hcorrect |
Origin and approval
| Construction | frame constructioncorrect |
|---|---|
| Units built | 200correct |
Other data
| PTO output | 14 hpcorrect |
|---|
Where this model stands
Power-to-weight ratio: 3.9 kW/t (10 kW / 2.6 t)
Power class: Compact (< 40 hp)
Stronger than 3% 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 Deutz MTH 122 have?
The Deutz MTH 122 delivers 14 hp.
How much does the Deutz MTH 122 weigh?
The unladen weight is 2,600 kg.
What engine does the Deutz MTH 122 have?
1 cylinders, 3,861 cm³ displacement, Vielstoff.
How fast does the Deutz MTH 122 go?
Top speed is 5.8 km/h.
What is the PTO output of the Deutz MTH 122?
PTO output is 14 hp.
When was the Deutz MTH 122 built?
Production years: 1924–1925.
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 22 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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