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Ihc McCormick Deering 10-20

Built: 1923–1939 · Series: McCormick Deering

Source: https://www.tractordata.com/farm-tractors/003/4/2/3429-mccor

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The Ihc McCormick Deering 10-20 is a model in the McCormick Deering series. Production: 1923–1939. The engine delivers 20.3 hp (14.9 kW), has 4 cylinders, with a displacement of 4,649 cm³. The machine is 3,124 mm long, 1,524 mm wide and 1,575 mm high. The unladen weight is 1,819 kg. The wheelbase measures 1,981 mm. Top speed is 7 km/h. Transmission: 3 V/1 R. The engine is water-cooled. Tyres: front 30 x 4.50, rear 42 x 12. The fuel is Kerosin / Benzin. The bore measures 107.95 mm. The stroke is 127 mm. Construction: frame construction. Around 215.472 units were built. Rated output across the Ihc range ranges from 14.6 to 100 hp; the McCormick Deering 10-20 sits at the bottom of that range with 20.3 hp. Its immediate neighbours are the D 217 Standard below it with 17 hp and the D 326 above it with 24 hp. Rated output across the Ihc range ranges from 10.7 to 73.5 kW; here the McCormick Deering 10-20 sits at the bottom of that range with 14.9 kW. 9 Ihc models across 6 series are on record.

McCormick Deering 10-20: water-cooled four-cylinder engine of 4,649 cc, kerosene/petrol operation, 20.3 hp (14.9 kW) and a top speed of 7 km/h as an early field tractor

International Harvester's McCormick Deering 10-20 ranks among the most significant and most widely built tractors of the 1920s and 1930s. The model contributed substantially to the mechanisation of agriculture in that period and was produced almost unchanged for well over a decade.

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The water-cooled four-cylinder engine of 4,649 cc ran at roughly 1,000 to 1,025 rpm and produced 20.3 hp (14.9 kW). It was designed to run on kerosene or petrol, as was typical of tractors of that era before the diesel engine took over in agriculture. At an unladen weight of 1,819 kilograms and a design top speed of 7 km/h, the machine was a pure field-work implement, not intended for road use.

The low engine speed and large displacement at comparatively modest power are typical of engines from this early period, designed for durability and simple maintenance rather than high specific output. Kerosene operation required a small petrol tank for cold starting and warm-up before switching to the main fuel.

When buying a 10-20 that is now nearly a hundred years old, the condition of the crankshaft, bearing shells and cylinder bores comes first, along with the tightness and condition of the radiator. Wooden-spoke wheels or their later replacement rims, the condition of the belt pulley and the completeness of the carburettor with its kerosene/petrol changeover deserve particular attention on this model.

Sources: SpecCodex-Register: Kennwerte des Modells McCormick Deering 10-20

Technical data

Engine

FuelKerosin / Benzincorrect
Power20.3 hp (14.9 kW)correct
Rated speed1.000/1.025 rpmcorrect
Cylinders4correct
Displacement4,649 cm³correct
Bore107.95 mmcorrect
Stroke127 mmcorrect
Coolingwater-cooledcorrect

Dimensions and weights

Length3,124 mmcorrect
Width1,524 mmcorrect
Height1,575 mmcorrect
Wheelbase1,981 mmcorrect
Unladen weight1,819 kgcorrect

Drivetrain and chassis

Driverear-wheel drivecorrect
Gearbox3 V/1 Rcorrect
Front tyres30 x 4.50correct
Rear tyres42 x 12correct
Top speed7 km/hcorrect

Origin and approval

Constructionframe constructioncorrect
Units built215,472correct

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 Ihc McCormick Deering 10-20 have?

The Ihc McCormick Deering 10-20 delivers 20.3 hp.

How much does the Ihc McCormick Deering 10-20 weigh?

The unladen weight is 1,819 kg.

What engine does the Ihc McCormick Deering 10-20 have?

4 cylinders, 4,649 cm³ displacement, Kerosin / Benzin.

How fast does the Ihc McCormick Deering 10-20 go?

Top speed is 7 km/h.

What are the dimensions of the Ihc McCormick Deering 10-20?

3,124 mm × 1,524 mm × 1,575 mm.

When was the Ihc 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: [1]

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