Introduction
Gray Tractor 20-36
The Gray Tractor 20-36 is a standard-tread tractor manufactured in Minneapolis, Minnesota, between 1922 and 1924. This model represents a period in American agricultural history where mechanical power began to replace animal traction for heavy-duty field operations.
Engine and Performance
The tractor is powered by a Waukesha DU liquid-cooled, 4-cylinder inline gasoline engine. With a displacement of 398 cubic inches (6.5 liters) and a bore/stroke ratio of 4.50 by 6.25 inches, the engine operates at a rated speed of 1000 RPM. This configuration provides a claimed 20 horsepower at the drawbar and 36 horsepower at the belt, enabling the machine to pull up to four plows.
Drivetrain and Transmission
The drivetrain utilizes a 3x1 drum drive system. The transmission is a manual gearbox offering two forward gears and one reverse gear, designed to provide the necessary torque for field work at the operating speeds typical of the early 1920s.
Dimensions and Chassis
The tractor is built on a 104-inch wheelbase with an overall length of 174 inches and a width of 81 inches. It features an open operator station with manual steering. The machine weighs 6,300 lbs (2,857 kg) and is equipped with steel wheels, specifically 40x8-inch wheels at the front and 54x54-inch wheels at the rear, ensuring stability for its intended agricultural applications.
Conclusion
The Gray Tractor 20-36 is a robust, heavy-duty machine designed for primary tillage and belt work. Its mechanical simplicity and substantial build reflect the engineering standards of the early 20th century, making it a notable subject for historical agricultural equipment preservation.
Production Information of Gray Tractor, 20-36
- Original price was $1,975 in 1922
- Standard-tread tractor
- Built in Minneapolis, Minnesota, USA
| Manufacturer | Gray Tractor |
|---|
Dimension and Tires Information of Gray Tractor, 20-36
| Wheelbase | 104 inches [264 cm] |
|---|---|
| Weight | 6300 lbs [2857 kg] |
| Height | 63 inches [160 cm] |
| Length | 174 inches [441 cm] |
| Width | 81 inches [205 cm] |
| Ag front | 40x8 steel |
|---|---|
| Ag rear | 54x54 steel |
Engine Specifications of Gray Tractor, 20-36
- Waukesha DU
- Liquid-cooled inline
- Gasoline
- 4-cylinder
| Rated RPM | 1000 |
|---|---|
| Displacement | 398 ci [6.5 L] |
| Bore/Stroke | 4.50x6.25 inches [114 x 159 mm] |
Transmission Information of Gray Tractor, 20-36
Transmission variants 1
| Type | Gear |
|---|---|
| Gears | 2 forward and 1 reverse |
Mechanical Specs of Gray Tractor, 20-36
- Manual steering
- Open operator station.
| Drive | 3x1 drum drive |
|---|
Power Information of Gray Tractor, 20-36
| Drawbar (claimed) | 20 hp [14.9 kW] |
|---|---|
| Belt (claimed) | 36 hp [26.8 kW] |
| Plows | 4 |
Where it sits
Its power puts it in the 61th percentile of 1920s models in our database (181 machines).
Frequently asked questions
How much horsepower does the Gray Tractor 20-36 have?
The Gray Tractor 20-36 delivers 36 hp[B] HP.
What years was the Gray Tractor 20-36 produced?
The Gray Tractor 20-36 was produced in 1922-1924.
What engine does the Gray Tractor 20-36 have?
The Gray Tractor 20-36 is powered by a Gasoline, 4-cylinder engine.
What transmission does the Gray Tractor 20-36 use?
The Gray Tractor 20-36 uses a Gear transmission.
How much does the Gray Tractor 20-36 weigh?
The Gray Tractor 20-36 weighs 6300 lbs [2857 kg].