Overview
The Wallis 12-20 is a standard-tread farm tractor manufactured in Racine, Wisconsin, by Wallis, a division of Massey-Harris, between 1929 and 1932. This 2WD model features a 4.1L 4-cylinder gasoline engine and an open operator station with manual steering. According to Nebraska Tractor Test 164, it achieved a maximum belt power of 24.16 hp and a maximum drawbar pull of 3,018 lbs.
Ideal Applications
Engine and Power Ratings:
The liquid-cooled 248 ci engine is rated at 1000 RPM and delivered a tested belt power of 24.16 hp, exceeding its initial 20 hp claim.
Transmission and Drive Configuration:
Equipped with a 3-speed gear transmission and a dry disc clutch, this tractor utilizes a two-wheel drive system and steel ag tires for traction.
Mechanical and Belt Specifications:
The 17-inch diameter belt pulley operates at 540 RPM with a 2400 ft/min speed, supported by a 15-gallon main fuel tank and a 1.75-gallon auxiliary tank.
Production
| Description | Standard-tread tractor / Built in Racine, Wisconsin, USA |
|---|---|
| Manufacturer | Wallis (a part of Massey-Harris) |
Engine
| Aux. fuel | 1.75 gal (6.6 L) |
|---|---|
| Engine type | Wallis 4.1L 4-cyl gasoline |
| Fuel tank | 15 gal (56.8 L) |
| Bore/Stroke | 3.875x5.25 inches (98 x 133 mm) |
| Description | Wallis / gasoline / 4-cylinder / liquid-cooled |
| Displacement | 248 ci (4.1 L) |
| Rated RPM | 1000 |
| Starter type | hand-crank |
| Belt (claimed) | 20 hp (14.9 kW) |
| Belt (tested) | 24.16 hp (18.0 kW) |
| Drawbar (claimed) | 12 hp (8.9 kW) |
| Drawbar (tested) | 18.07 hp (13.5 kW) |
| Plows | 2 |
Transmission
| Clutch | dry disc |
|---|---|
| Gears | 3 forward and 1 reverse |
| Transmission type | 3-speed gear |
| Type | gear |
Mechanical
| Cab | Open operator station. |
|---|---|
| Description | Manual steering |
| Drive type | Two-wheel drive |
Dimensions & Tires
| Height | 51 inches (129 cm) |
|---|---|
| Length | 121 inches (307 cm) |
| Weight | 3455 lbs (1567 kg) |
| Wheelbase | 78 inches (198 cm) |
| Width | 55 inches (139 cm) |
| Front tire | 28x5 |
| Rear tire | 44x10 |
| Weight | 3455 lbs (1567 kg) |
| Wheelbase | 78 inches (198 cm) |
| Ag front | 28x5 (steel) |
| Ag rear | 44x10 (steel) |
Belt Pulley
| Diameter | 17 inches (43 cm) |
|---|---|
| RPM | 540 |
| Speed | 2400 ft/min (731.52 meters/min) |
| Width | 6 inches (15 cm) |
Nebraska Tractor Test 164
| Belt fuel use (max) | 2.5 gal/hour (9.5 l/hour) |
|---|---|
| Belt power (max) | 24.16 hp (18.0 kW) |
| Description | Gasoline 3-speed 2WDJune 18 - 27, 1929Link: Nebraska Tractor Test 164 file / Drawbar performance |
| Max power | 18.07 hp (13.5 kW) |
| Max pull | 3,018 lbs (1368 kg) |
References
| Description | 20-30 Tractor / 12-20 Tractor published by Wallis |
|---|