Introduction
Cletrac DD Agricultural Crawler Tractor
The Cletrac DD is an agricultural crawler tractor produced between 1937 and 1958 by Cletrac, a division of the Oliver Corporation, in Cleveland, Ohio. Designed for heavy-duty field operations, this model was built in a total of 5,624 units and is recognized for its durability and traction capabilities in demanding environments.
Engine and Performance
The tractor is powered by a Hercules DRXB diesel engine, a liquid-cooled, 6-cylinder vertical I-head unit. It features a displacement of 474 cubic inches (7.8 liters) and operates at a rated 1,300 RPM. The engine utilizes a 15:1 compression ratio and is supported by a 38.8-liter (41 quarts) coolant capacity, with air intake managed by a Vortox oil bath cleaner. The system is energized by a 24-volt starter.
Transmission and Drive
The drivetrain consists of a gear-type transmission providing 4 forward and 2 reverse gears. Power is delivered to the tracks through a dry disc clutch, which provides the necessary engagement for the crawler's operational requirements. The crawler drive configuration is specifically engineered for stability and traction on uneven or soft agricultural terrain.
Physical Specifications
With an operating weight of 13,300 lbs (6,032 kg), the Cletrac DD provides significant ground pressure characteristics suitable for heavy draft work. The tractor is configured with an open operator station, prioritizing visibility and accessibility for the operator during field tasks.
Conclusion
The Cletrac DD stands as a representative example of mid-20th-century American agricultural engineering. Its combination of a 70-horsepower engine and a track-drive system makes it particularly suited for applications requiring high tractive effort and stability, remaining a notable piece of machinery for collectors and historians of agricultural technology.
Production Information of Cletrac, DD
- Agricultural Crawler tractor
- Built in Cleveland, Ohio, USA
| Manufacturer | Cletrac (a part of Oliver) |
|---|---|
| Total built | 5,624 |
Engine Specifications of Cletrac, DD
- Hercules DRXB
- Liquid-cooled vertical I-head
- Diesel
- 6-cylinder
| Coolant capacity | 41 qts [38.8 L] |
|---|---|
| Displacement | 474 ci [7.8 L] |
| Compression | 15:1 |
| Bore/Stroke | 4.375x5.25 inches [111 x 133 mm] |
| Starter volts | 24 |
| Rated RPM | 1300 |
| Air cleaner | Vortox oil bath |
Transmission Information of Cletrac, DD
Transmission variants 1
| Type | Gear |
|---|---|
| Gears | 4 forward and 2 reverse |
| Clutch | Dry disc |
Mechanical Specs of Cletrac, DD
- Open operator station.
| Drive | Crawler |
|---|
Power Information of Cletrac, DD
- Https://www.tractordata.com/farm-tractors/001/8/1/1811-cletrac-dd-tests.html
Where it sits
With 70 hp[B] HP, the Cletrac DD sits between CG (58 HP) and FD (88 HP) in Cletrac's range. Its power puts it in the 91th percentile of 1930s models in our database (235 machines).
Frequently asked questions
How much horsepower does the Cletrac DD have?
The Cletrac DD delivers 70 hp[B] HP.
What years was the Cletrac DD produced?
The Cletrac DD was produced in 1937-1958.
What engine does the Cletrac DD have?
The Cletrac DD is powered by a Diesel, 6-cylinder engine.
What transmission does the Cletrac DD use?
The Cletrac DD uses a Gear transmission.