Overview
The Wallis 20-30 is a farm tractor produced between 1927 and 1932 in Racine, Wisconsin, featuring a standard-tread configuration and an open operator station. It is powered by a 5.7L four-cylinder liquid-cooled gasoline engine and equipped with a two-speed gear transmission.
Ideal Applications
Tested Power Output:
According to Nebraska Tractor Test 134, this model achieved a maximum belt power of 35.29 hp and a maximum drawbar pull of 3,409 lbs while operating at a rated 1050 RPM.
Transmission and Drive Configuration:
The mechanical layout consists of a two-wheel drive system, a dry disc clutch, and a gear transmission providing two forward speeds and one reverse speed.
Belt Pulley Specifications:
The tractor is equipped with a 19-inch diameter belt pulley that has a 7-inch width and operates at a speed of 475 RPM.
Production
| Description | Standard-tread tractor / Built in Racine, Wisconsin, USA |
|---|---|
| Manufacturer | Wallis (a part of J.I. Case Plow Works) |
Engine
| Aux. fuel | 1.75 gal (6.6 L) |
|---|---|
| Engine type | Wallis 5.7L 4-cyl gasoline |
| Fuel tank | 20 gal (75.7 L) |
| Bore/Stroke | 4.375x5.75 inches (111 x 146 mm) |
| Description | Wallis / gasoline / 4-cylinder / liquid-cooled |
| Displacement | 346 ci (5.7 L) |
| Rated RPM | 1050 |
| Starter type | hand-crank |
| Belt (claimed) | 30 hp (22.4 kW) |
| Belt (tested) | 35.29 hp (26.3 kW) |
| Drawbar (claimed) | 20 hp (14.9 kW) |
| Drawbar (tested) | 27.01 hp (20.1 kW) |
| Plows | 3 |
Transmission
| Clutch | dry disc |
|---|---|
| Gears | 2 forward and 1 reverse |
| Transmission type | 2-speed gear |
| Type | gear |
Mechanical
| Cab | Open operator station. |
|---|---|
| Drive type | Two-wheel drive |
| Steering | manual |
Dimensions & Tires
| Height | 55 inches (139 cm) |
|---|---|
| Length | 131.5 inches (334 cm) |
| Weight | 4,136 lbs (1876 kg) |
| Wheelbase | 84 inches (213 cm) |
| Rear tire | 48x12 |
| Weight | 4,136 lbs (1876 kg) |
| Wheelbase | 84 inches (213 cm) |
| Ag rear | 48x12 (steel) |
Belt Pulley
| Diameter | 19 inches (48 cm) |
|---|---|
| RPM | 475 |
| Width | 7 inches (17 cm) |
Nebraska Tractor Test 134
| Belt fuel use (max) | 4.2 gal/hour (15.9 l/hour) |
|---|---|
| Belt power (max) | 35.29 hp (26.3 kW) |
| Description | Gasoline 2-speed 2WDApril 29 - May 10, 1927Link: Nebraska Tractor Test 134 file / Drawbar performance |
| Max power | 27.01 hp (20.1 kW) |
| Max pull | 3,409 lbs (1546 kg) |
References
| Description | 20-30 Tractor / 12-20 Tractor published by Wallis |
|---|