Overview
The Leader D 25-40 is a half-track crawler tractor manufactured by Dayton-Dick in Quincy, Illinois, featuring a 13.0L liquid-cooled 4-cylinder Doman engine. This farm tractor is configured with an open operator station under a four-post canopy and weighs 6,500 lbs. It is equipped with a 2-speed gear transmission and was priced at $2,895 in 1920.
Ideal Applications
Belt Pulley Performance:
The tractor is equipped with a 14-inch diameter belt pulley rated at 750 RPM and a speed of 2,750 feet per minute, delivering a claimed 40 hp.
Drive Configuration and Chassis:
This model utilizes a half-track drive system with manual steering and occupies a physical footprint of 153 inches in length and 64 inches in width.
Engine and Pulling Capacity:
The 792 ci kerosene engine utilizes a Holley carburetor and hand crank starter to provide a claimed 25 hp at the drawbar, rated for 5 to 6 14-inch plows.
Production
| Description | Half-track Crawler tractor / Built in Quincy, Illinois, USA / Original price was $2,895 in 1920 |
|---|---|
| Manufacturer | Leader (a part of Dayton-Dick) |
Engine
| Engine type | Doman 13.0L 4-cyl kerosene |
|---|---|
| Bore/Stroke | 6.00x7.00 inches (152 x 178 mm) |
| Description | Doman / kerosene / 4-cylinder / liquid-cooled |
| Displacement | 792 ci (13.0 L) |
| Fuel system | Holley carburetor |
| Rated RPM | 750 |
| Starter type | hand crank |
| Belt (claimed) | 40 hp (29.8 kW) |
| Drawbar (claimed) | 25 hp (18.6 kW) |
| Plows | 5-6 (14-inch) |
Transmission
| Gears | 2 forward and 1 reverse |
|---|---|
| Transmission type | 2-speed gear |
| Type | gear |
Mechanical
| Cab | Open operator station with four-post canopy. |
|---|---|
| Description | Manual steering |
| Drive | half-track |
Dimensions & Tires
| Height | 96 inches (243 cm) |
|---|---|
| Length | 153 inches (388 cm) |
| Weight | 6500 lbs (2948 kg) |
| Width | 64 inches (162 cm) |
| Rear tire | tracks |
| Weight | 6500 lbs (2948 kg) |
| Ag rear | tracks |
Belt Pulley
| Diameter | 14 inches (35 cm) |
|---|---|
| RPM | 750 |
| Speed | 2750 ft/min (838.20 meters/min) |
| Width | 8 inches (20 cm) |