Wallis 12-20: all source data
All 41 values recorded for this model, as the source lists them and in its units. The spec sheet shows the same data checked, typed and converted.
Overview
Production| Manufacturer | Wallis (a part of Massey-Harris) |
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| (no label) | Standard-tread tractor |
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| (no label) | Built in Racine, Wisconsin, USA |
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Engine| (no label) | Wallis 4.1L 4-cyl gasoline |
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| Fuel tank | 15 gal | 56.8 L |
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| Aux. fuel | 1.75 gal | 6.6 L |
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Transmission| (no label) | 3-speed gear |
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Power| Drawbar (claimed) | 12 hp | 8.9 kW |
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| Belt (claimed) | 20 hp | 14.9 kW |
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| Plows | 2 |
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| Drawbar (tested) | 18.07 hp | 13.5 kW |
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| Belt (tested) | 24.16 hp | 18.0 kW |
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Mechanical| (no label) | Two-wheel drive |
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| (no label) | Manual steering |
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| (no label) | Open operator station. |
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Dimensions| Wheelbase | 78 inches | 198 cm |
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| Weight | 3455 lbs | 1567 kg |
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| Front tire | 28x5 |
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| Rear tire | 44x10 |
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Belt pulley| Diameter | 17 inches | 43 cm |
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| Width | 6 inches | 15 cm |
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| RPM | 540 |
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| Speed | 2400 ft/min | 731.52 meters/min |
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Engine
Engine detail| (no label) | Wallis |
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| (no label) | gasoline |
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| (no label) | 4-cylinder |
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| (no label) | liquid-cooled |
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| Displacement | 248 ci | 4.1 L |
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| Bore/Stroke | 3.875x5.25 inches | 98 x 133 mm |
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| Rated RPM | 1000 |
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| Starter type | hand-crank |
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Transmission
Transmission| Type | gear |
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| Gears | 3 forward and 1 reverse |
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| Clutch | dry disc |
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Dimensions
Tires| Ag front | 28x5 (steel) |
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| Ag rear | 44x10 (steel) |
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Dimensions| Wheelbase | 78 inches | 198 cm |
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| Length | 121 inches | 307 cm |
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| Width | 55 inches | 139 cm |
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| Height | 51 inches | 129 cm |
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| Weight | 3455 lbs | 1567 kg |
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