Mccormick Deering W-40 (38.2 kW)
Built: 1935–1940 · Series: W-40 Baureihe
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McCormick-Deering W-40 of the W-40 series (IHC): a water-cooled four-cylinder standard tractor with a diesel engine producing 38.2 kW (52 hp), built 1935 to 1940, weighing 3,425 kg, with a top speed of 19.5 km/h.
The W-40 was a standard-tread tractor from International Harvester (McCormick-Deering), built between 1935 and 1940. Unlike the narrow-track row-crop tractors of the F series, it had a rigid frame with axles of similar height, built for general field work.
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The W-40 is powered by a water-cooled four-cylinder International engine with 7,550 cm3 displacement, producing 38.2 kW (52 hp) at a rated speed of 1,100 to 1,200 rpm. Running on diesel fuel, it was unusual for its time, since most farm tractors of the 1930s still ran on petrol or kerosene. At 3,425 kg, with a wheelbase of 2,159 mm and a top speed of 19.5 km/h, it is noticeably heavier and slower than the brand's small row-crop tractors.
As an early diesel-powered standard tractor, the W-40 represented the beginning of the shift from petrol and kerosene to the more economical diesel fuel in late-1930s American farming. With over 7.5 litres of displacement at a low rated speed, the engine was built for high torque in soil cultivation and belt-pulley work rather than for high road speed.
When buying a 1930s W-40, the injection pump of the early diesel engine is the most critical point, since spare parts for this design are rare and mostly found through specialist vintage-tractor restorers. Also check the radiator and water pump of the liquid cooling system, along with the frame and axle bearings for wear after decades of use, as is typical for standard tractors of this weight class.
Sources: SpecCodex-Register: Kennwerte des Modells McCormick-Deering W-40
Technical data
Engine
| Engine make | Internationalcorrect |
|---|---|
| Fuel | dieselcorrect |
| Power | 52 hp (38.2 kW)correct |
| Rated speed | 1.100/1.200 rpmcorrect |
| Cylinders | 4correct |
| Displacement | 7,550 cm³correct |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 3,594 mmcorrect |
|---|---|
| Width | 1,670 mmcorrect |
| Height | 1,803 mmcorrect |
| Wheelbase | 2,159 mmcorrect |
| Unladen weight | 3,425 kg (6,100 lbs)correct |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 3 V/1 R or 4 V/1 Rcorrect |
| Front tyres | 34 x 6correct |
| Rear tyres | 50 x 12correct |
| Top speed | 19.5 km/hcorrect |
Working data
| Fuel tank capacity | 31 galcorrect |
|---|
Origin and approval
| Construction | frame constructioncorrect |
|---|---|
| Units built | 3,400correct |
Where this model stands
Power-to-weight ratio: 11.2 kW/t (38 kW / 3.4 t)
Power class: Universal (40–100 hp)
Stronger than 36% 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 Mccormick Deering W-40 have?
The Mccormick Deering W-40 delivers 52 hp.
How much does the Mccormick Deering W-40 weigh?
The unladen weight is 3,425 kg.
What engine does the Mccormick Deering W-40 have?
4 cylinders, 7,550 cm³ displacement, Diesel.
How fast does the Mccormick Deering W-40 go?
Top speed is 19.5 km/h.
What are the dimensions of the Mccormick Deering W-40?
3,594 mm × 1,670 mm × 1,803 mm.
When was the Mccormick Deering W-40 built?
Production years: 1935–1940.
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 25 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
Turn the model, look inside and click an assembly — each one is explained.
