Introduction
Caterpillar RD7 Crawler Tractor
The Caterpillar RD7 is an agricultural crawler tractor produced in Peoria, Illinois, USA, between 1935 and 1940. It represents a significant era in heavy-duty machinery design, serving as a precursor to the long-running D7 series.
Engine and Performance
The machine is powered by a 4-cylinder liquid-cooled diesel engine. With a displacement of 831 cubic inches (13.6 liters) and a bore/stroke ratio of 146 x 203 mm, it delivers a rated output of 75 horsepower at 1000 RPM. The engine intake is protected by an oil bath air cleaner, designed to maintain performance in dusty agricultural environments.
Transmission and Drive
Power is transferred through a manual gear-type transmission providing 4 forward speeds and 1 reverse speed. The drive system utilizes a dry disc clutch, a standard configuration for crawler tractors of this period, ensuring reliable power engagement for heavy drawbar applications.
Mechanical Configuration
As a crawler tractor, the RD7 features tracks rather than traditional wheels, providing superior traction and weight distribution on uneven or soft terrain. The unit weighs 21,020 lbs (9,534 kg) and is equipped with an open operator station, prioritizing visibility and accessibility for the operator.
Conclusion
With its substantial weight and robust diesel drivetrain, the Caterpillar RD7 was engineered for high-torque tasks such as deep soil cultivation, land clearing, and heavy-duty earthmoving. It remains a notable example of mid-1930s industrial tractor engineering.
Production Information of Caterpillar, RD7
- Agricultural Crawler tractor
- Built in Peoria, Illinois, USA
| Manufacturer | Caterpillar |
|---|
Engine Specifications of Caterpillar, RD7
- Caterpillar
- Liquid-cooled
- Diesel
- 4-cylinder
| Air cleaner | Oil bath |
|---|---|
| Displacement | 831 ci [13.6 L] |
| Rated RPM | 1000 |
| Bore/Stroke | 5.75x8.00 inches [146 x 203 mm] |
Transmission Information of Caterpillar, RD7
Transmission variants 1
| Type | Gear |
|---|---|
| Gears | 4 forward and 1 reverse |
| Clutch | Dry disc |
Mechanical Specs of Caterpillar, RD7
- Open operator station.
| Drive | Crawler |
|---|
Power Information of Caterpillar, RD7
- Https://www.tractordata.com/farm-tractors/002/9/7/2974-caterpillar-rd7-tests.html
Where it sits
With 75 hp[B] HP, the Caterpillar RD7 sits just below D7 (102 HP) in Caterpillar's range. Its power puts it in the 92th percentile of 1930s models in our database (235 machines).
Frequently asked questions
How much horsepower does the Caterpillar RD7 have?
The Caterpillar RD7 delivers 75 hp[B] HP.
What years was the Caterpillar RD7 produced?
The Caterpillar RD7 was produced in 1935-1940.
What engine does the Caterpillar RD7 have?
The Caterpillar RD7 is powered by a Diesel, 4-cylinder engine.
What transmission does the Caterpillar RD7 use?
The Caterpillar RD7 uses a Gear transmission.