Leader
Leader D 25-40
The Leader D 25-40 is a half-track crawler tractor built in 1920 by Leader, a part of Dayton-Dick, in Quincy, Illinois, USA. It features a Doman 13.0L 4-cylinder liquid-cooled kerosene engine with a Holley carburetor and hand crank starter. The tractor has a 2-speed gear transmission with 2 forward and 1 reverse gears. It delivers 25 hp drawbar power and 40 hp belt power, capable of pulling 5-6 14-inch plows. The tractor weighs 6500 lbs and rides on tracks with an open operator station protected by a four-post canopy. The belt pulley diameter is 14 inches with a width of 8 inches, running at 750 RPM and a belt speed of 2750 ft/min.
Power44 hp[B]
Founded1916 - 1920
ModelD 25-40
Technical Specifications
Detailed specifications and technical data for Leader D 25-40
Power
| Plows | 5-6 (14-inch) |
|---|---|
| Belt (claimed) | 40 hp (29.8 kW) |
| Drawbar (claimed) | 25 hp (18.6 kW) |
Engine
| Make | Doman |
|---|---|
| Type | 4-cyl kerosene |
| Cooling | liquid-cooled |
| Rated RPM | 750 |
| Bore/Stroke | 6.00x7.00 inches (152 x 178 mm) |
| Fuel system | Holley carburetor |
| Displacement | 792 ci (13.0 L) |
| Starter type | hand crank |
Mechanical
| Drive | half-track |
|---|---|
| Steering | Manual steering |
| Operator station | Open operator station with four-post canopy. |
Production
| Type | Half-track Crawler tractor |
|---|---|
| Year | 1920 |
| Built in | Quincy, Illinois, USA |
| Original price | $2,895 in 1920 |
Belt Pulley
| RPM | 750 |
|---|---|
| Speed | 2750 ft/min (838.20 meters/min) |
| Width | 8 inches (20 cm) |
| Diameter | 14 inches (35 cm) |
Transmission
| Type | gear |
|---|---|
| Gears | 2 forward and 1 reverse |
Dimensions & Tires
| Width | 64 inches (162 cm) |
|---|---|
| Height | 96 inches (243 cm) |
| Length | 153 inches (388 cm) |
| Weight | 6500 lbs (2948 kg) |
| Rear tire | tracks |