Gray Tractor
Gray Tractor 15-25 B
The Gray Tractor 15-25 B is a standard-tread farm tractor produced from 1915 to 1916 by Gray Tractor in Minneapolis, Minnesota, USA. It features a Waukesha 6.1L 4-cylinder liquid-cooled gasoline engine rated at 800 RPM, with a 30-gallon fuel tank. The tractor has a 2-speed gear transmission with 2 forward and 1 reverse gears, and a 3x1 drum drive with manual steering and an open operator station. It delivers 15 hp at the drawbar and 25 hp at the belt (claimed). Dimensions include a length of 174 inches, width of 76 inches, height of 60 inches, and weight of 5500 lbs. Tires are steel with sizes 39x8 front and 55x48 rear. The belt pulley measures 11 inches in diameter and 7 inches in width. Original price was $1,650 in 1916.
Power25 hp[B]
Founded1915 - 1916
Model15-25 B
Technical Specifications
Detailed specifications and technical data for Gray Tractor 15-25 B
Power
| Belt (claimed) | 25 hp (18.6 kW) |
|---|---|
| Drawbar (claimed) | 15 hp (11.2 kW) |
Tires
| Rear tire | 55x48 steel |
|---|---|
| Front tire | 39x8 steel |
Engine
| Make | Waukesha |
|---|---|
| Type | gasoline |
| Cooling | liquid-cooled inline |
| Cylinders | 4-cylinder |
| Fuel tank | 30 gal (113.6 L) |
| Rated RPM | 800 |
| Bore/Stroke | 4.25x6.75 inches (108 x 171 mm) |
| Displacement | 373 ci (6.1 L) |
Dimensions
| Width | 76 inches (193 cm) |
|---|---|
| Height | 60 inches (152 cm) |
| Length | 174 inches (441 cm) |
| Weight | 5500 lbs (2494 kg) |
Mechanical
| Drive | 3x1 drum drive |
|---|---|
| Steering | Manual steering |
| Operator station | Open operator station |
Production
| Type | Standard-tread tractor |
|---|---|
| Built in | Minneapolis, Minnesota, USA |
| Original price | $1,650 in 1916 |
| Years produced | 1915 - 1916 |
Belt Pulley
| Width | 7 inches (17 cm) |
|---|---|
| Diameter | 11 inches (27 cm) |
Transmission
| Type | gear |
|---|---|
| Gears | 2 forward and 1 reverse |
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