Overview
The Wallis OK 15-27 is a standard-tread farm tractor manufactured between 1923 and 1927 in Racine, Wisconsin. It features a 5.3L four-cylinder liquid-cooled gasoline engine and a transmission with two forward and one reverse gears. This 3,630-pound tractor is equipped with steel wheels and a hand-crank starter system.
Ideal Applications
Tested Drawbar Performance:
According to Nebraska Tractor Test 92, the tractor achieved a maximum drawbar pull of 2,590 lbs and a maximum drawbar output of 18.15 hp.
Belt Pulley Specifications:
The unit is equipped with an 18.5-inch diameter pulley that delivers a tested maximum of 28.60 hp at 475 RPM with a belt speed of 2,300 ft/min.
Engine and Fuel Configuration:
The 326.3 ci gasoline engine is rated at 1000 RPM and demonstrated a maximum fuel consumption rate of 3.5 gallons per hour during testing.
Production
| Description | Standard-tread tractor / Built in Racine, Wisconsin, USA |
|---|---|
| Manufacturer | Wallis (a part of J.I. Case Plow Works) |
Engine
| Engine type | Wallis 5.3L 4-cyl gasoline |
|---|---|
| Bore/Stroke | 4.25x5.75 inches (108 x 146 mm) |
| Description | Wallis / gasoline / 4-cylinder / liquid-cooled |
| Displacement | 326.3 ci (5.3 L) |
| Rated RPM | 1000 |
| Starter type | hand-crank |
| Belt (claimed) | 27 hp (20.1 kW) |
| Belt (tested) | 28.60 hp (21.3 kW) |
| Drawbar (claimed) | 15 hp (11.2 kW) |
| Drawbar (tested) | 18.15 hp (13.5 kW) |
Transmission
| Gears | 2 forward and 1 reverse |
|---|---|
| Transmission type | 2-speed gear |
| Type | gear |
Mechanical
| Drive type | Two-wheel drive |
|---|---|
| Steering | manual |
Dimensions & Tires
| Height | 65 inches (165 cm) |
|---|---|
| Length | 132 inches (335 cm) |
| Weight | 3,630 lbs (1646 kg) |
| Width | 61 inches (154 cm) |
| Front tire | 30x8 |
| Rear tire | 48x12 |
| Weight | 3,630 lbs (1646 kg) |
| Ag front | 30x8 (steel) |
| Ag rear | 48x12 (steel) |
Belt Pulley
| Diameter | 18.5 inches (46 cm) |
|---|---|
| RPM | 475 |
| Speed | 2,300 ft/min (701.04 meters/min) |
| Width | 7 inches (17 cm) |
Nebraska Tractor Test 92
| Belt fuel use (max) | 3.5 gal/hour (13.2 l/hour) |
|---|---|
| Belt power (max) | 28.60 hp (21.3 kW) |
| Description | Gasoline 2-speed 2WDApril 26 - May 5, 1923 / Drawbar performance |
| Max power | 18.15 hp (13.5 kW) |
| Max pull | 2,590 lbs (1174 kg) |