International Harvester McCormick Deering 10-20
Built: 1923–1939 · Series: McCormick Deering
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International Harvester McCormick-Deering 10-20 – early four-cylinder standard tractor with a kerosene engine, 14.9 kW and a 7 km/h top speed, built from 1923 to 1939.
The McCormick-Deering 10-20 is one of International Harvester's early production tractors, built from 1923 to 1939, at a time when the shift from steam and horse-drawn work to the motorised farm tractor was in full swing. Its name joins the two brands, McCormick and Deering, whose merger in 1902 had created International Harvester.
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The 10-20 is driven by a water-cooled four-cylinder engine of 4,649 cm3 displacement, running on kerosene or petrol and producing 14.9 kW (20.3 hp) at around 1,000 rpm. At 1,819 kg, 3,124 mm long and 1,524 mm wide on a 1,981 mm wheelbase, it is a light standard tractor typical of its time. Its design top speed is 7.0 km/h.
A low-compression, open-cooled kerosene engine was the common answer in the 1920s to a fuel that was cheaper than petrol but harder to ignite, so such engines ran at noticeably lower speeds than today's diesels. At 7 km/h top speed, the 10-20 was a pure field-work machine with no road ambitions at all, quite unlike modern tractors with their driving licence classes up to 40 or 60 km/h.
On a hundred-year-old tractor of this type, substance matters more than cosmetics: the condition of the crankshaft and its bearing shells, the tightness of the cooling system, and the state of the belt pulley, which on machines like this often drove stationary equipment as well. Iron wheels and steel spokes should be checked for cracks. Parts are found through specialist vintage farm machinery dealers rather than ordinary trade channels.
Sources: SpecCodex-Register: Kennwerte des Modells International Harvester McCormick Deering 10-20
Technical data
Engine
| Fuel | Kerosin / Benzincorrect |
|---|---|
| Power | 20.3 hp (14.9 kW)correct |
| Rated speed | 1.000/1.025 rpmcorrect |
| Cylinders | 4correct |
| Displacement | 4,649 cm³correct |
| Bore | 107.95 mmcorrect |
| Stroke | 127 mmcorrect |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 3,124 mmcorrect |
|---|---|
| Width | 1,524 mmcorrect |
| Height | 1,575 mmcorrect |
| Wheelbase | 1,981 mmcorrect |
| Unladen weight | 1,819 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 3 V/1 Rcorrect |
| Front tyres | 30 x 4.50correct |
| Rear tyres | 42 x 12correct |
| Top speed | 7 km/hcorrect |
Origin and approval
| Construction | frame constructioncorrect |
|---|---|
| Units built | 215,472correct |
Where this model stands
Power-to-weight ratio: 8.2 kW/t (15 kW / 1.8 t)
Power class: Compact (< 40 hp)
Stronger than 7% 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 International Harvester McCormick Deering 10-20 have?
The International Harvester McCormick Deering 10-20 delivers 20.3 hp.
How much does the International Harvester McCormick Deering 10-20 weigh?
The unladen weight is 1,819 kg.
What engine does the International Harvester McCormick Deering 10-20 have?
4 cylinders, 4,649 cm³ displacement, Kerosin / Benzin.
How fast does the International Harvester McCormick Deering 10-20 go?
Top speed is 7 km/h.
What are the dimensions of the International Harvester McCormick Deering 10-20?
3,124 mm × 1,524 mm × 1,575 mm.
When was the International Harvester McCormick Deering 10-20 built?
Production years: 1923–1939.
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 21 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: Wikibooks Traktorenlexikon (CC BY-SA 4.0) (retrieved August 2026) · How we check the data
Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.
