Introduction
Gray Tractor 15-25
The Gray Tractor 15-25 is a standard-tread agricultural tractor manufactured by Gray Tractor in Minneapolis, Minnesota, between 1915 and 1916. Designed for early 20th-century farming operations, this machine reflects the engineering standards of its period, featuring a robust metallic construction and a liquid-cooled engine.
Engine and Performance
The tractor is powered by a Waukesha liquid-cooled inline 4-cylinder gasoline engine. With a displacement of 373 cubic inches (6.1 liters) and a rated operating speed of 800 RPM, the unit delivers a drawbar power of 15 hp (11.2 kW) and a belt power of 25 hp (18.6 kW). The engine bore and stroke are measured at 4.25 by 6.75 inches (108 x 171 mm).
Transmission and Mechanical System
The power is delivered through a 3x1 drum drive transmission system. It is equipped with two forward gears and one reverse gear. Steering is operated manually, and the tractor features an open operator station typical of its era. The machine utilizes steel agricultural wheels, with 39x8-inch wheels at the front and 55x48-inch wheels at the rear.
Dimensions and Specifications
The Gray 15-25 has a total length of 174 inches (441 cm), a width of 76 inches (193 cm), and a height of 60 inches (152 cm). The machine has a base weight of 5,500 lbs (2,494 kg), providing the necessary ballast for traction in field conditions.
Conclusion
The Gray Tractor 15-25 represents a significant piece of early American agricultural machinery. With its 25 hp belt rating and durable drum drive design, it was intended for general farm work and stationary belt-driven tasks. Today, it serves as a historical reference for the development of tractor technology in the early 20th century.
Production Information of Gray Tractor, 15-25
- Original price was $1,650 in 1916
- Standard-tread tractor
- Built in Minneapolis, Minnesota, USA
| Manufacturer | Gray Tractor |
|---|
Dimension and Tires Information of Gray Tractor, 15-25
| Length | 174 inches [441 cm] |
|---|---|
| Weight | 5500 lbs [2494 kg] |
| Width | 76 inches [193 cm] |
| Height | 60 inches [152 cm] |
| Ag front | 39x8 steel |
|---|---|
| Ag rear | 55x48 steel |
Engine Specifications of Gray Tractor, 15-25
- Waukesha
- Liquid-cooled inline
- Gasoline
- 4-cylinder
| Rated RPM | 800 |
|---|---|
| Displacement | 373 ci [6.1 L] |
| Bore/Stroke | 4.25x6.75 inches [108 x 171 mm] |
Transmission Information of Gray Tractor, 15-25
Transmission variants 1
| Type | Gear |
|---|---|
| Gears | 2 forward and 1 reverse |
Mechanical Specs of Gray Tractor, 15-25
- Manual steering
- Open operator station.
| Drive | 3x1 drum drive |
|---|
Power Information of Gray Tractor, 15-25
| Drawbar (claimed) | 15 hp [11.2 kW] |
|---|---|
| Belt (claimed) | 25 hp [18.6 kW] |
Where it sits
With 25 hp[B] HP, the Gray Tractor 15-25 sits just below 18-30 (30 HP) in Gray Tractor's range. Its power puts it in the 32th percentile of 1910s models in our database (158 machines).
Frequently asked questions
How much horsepower does the Gray Tractor 15-25 have?
The Gray Tractor 15-25 delivers 25 hp[B] HP.
What years was the Gray Tractor 15-25 produced?
The Gray Tractor 15-25 was produced in 1915-1916.
What engine does the Gray Tractor 15-25 have?
The Gray Tractor 15-25 is powered by a Gasoline, 4-cylinder engine.
What transmission does the Gray Tractor 15-25 use?
The Gray Tractor 15-25 uses a Gear transmission.
How much does the Gray Tractor 15-25 weigh?
The Gray Tractor 15-25 weighs 5500 lbs [2494 kg].