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| info | |
| 1927 - 1932, Standard-tread tractor | |
| Previous model: | Wallis OK 15-27 |
| Series back: | Wallis 12-20 |
| Production | |
| Manufacturer: | J.I. Case Plow Works |
| Factory: | Racine, Wisconsin, USA |
| Capacity | |
| Fuel: | 20 gal [75.7 L] |
| Aux. fuel: | 1.75 gal [6.6 L] |
| Dimensions & Tires | |
| Wheelbase: | 84 inches [213 cm] |
| Weight: | 4,136 lbs [1876 kg] |
| Rear tire: | 48x12 |
| 20-30 Serial Numbers | |
| - Serial numbers unknown - |
| Wallis 20-30 Power | |
| Drawbar (claimed): | 20 hp [14.9 kW] |
| Belt (claimed): | 30 hp [22.4 kW] |
| Plows: | 3 |
| Drawbar (tested): | 27.01 hp [20.1 kW] |
| Belt (tested): | 35.29 hp [26.3 kW] |
| Mechanical | |
| Chassis: | 4x2 2WD |
| Steering: | manual |
| Cab: | Open operator station. |
| Belt Pulley | |
| Diameter: | 19 inches [48 cm] |
| Width: | 7 inches [17 cm] |
| RPM: | 475 |
| info | |
| Bore/Stroke: | 4.375x5.75 inches [111 x 146 mm] |
| Rated RPM: | 1050 |
| Starter type: | hand-crank |
| Engine Detail | |
| Wallis, gasoline, 4-cylinder, liquid-cooled, 346 ci [5.7 L] |
| info | |
| Previous model: | Wallis OK 15-27 |
| Series back: | Wallis 12-20 |
| Transmission | |
| Type: | gear |
| Gears: | 2 forward and 1 reverse |
| Clutch: | dry disc |
| info | |
| Previous model: | Wallis OK 15-27 |
| Series back: | Wallis 12-20 |
| Dimensions | |
| Weight: | 4,136 lbs [1876 kg] |
| Wheelbase: | 84 inches [213 cm] |
| Length: | 131.5 inches [334 cm] |
| Height: | 55 inches [139 cm] |
| Wallis 20-30 Tires | |
| Ag rear: | 48x12 (steel) |