Introduction
Caterpillar D7D Agricultural Crawler Tractor
The Caterpillar D7D is an agricultural crawler tractor produced in Peoria, Illinois, USA, between 1959 and 1961. Designed for demanding field operations, it represents the evolution of the D7 series, focusing on heavy-duty traction and mechanical reliability.
Engine and Performance
The tractor is powered by a 4-cylinder turbocharged diesel engine with a displacement of 831 cubic inches (13.6 liters). It utilizes a liquid-cooling system and an oil-bath air cleaner to maintain operational efficiency. The engine is rated at 1200 RPM and features a compression ratio of 15.7:1. A 2-cylinder gasoline 'pony' engine is employed as the starting method for the main diesel unit.
Transmission and Drivetrain
Power is delivered through a gear-type transmission providing 5 forward and 4 reverse speeds. The drivetrain incorporates a dry metallic disc clutch. Steering is achieved via manual clutches, and the machine is equipped with contracting band brakes to manage speed and directional control.
Chassis and Dimensions
As a crawler tractor, the D7D operates on 20-inch tracks, which provide the necessary footprint for stability and traction on soft or uneven terrain. The base machine has a weight of 24,330 lbs (11,036 kg), ensuring significant downward pressure for deep tillage or heavy pulling tasks.
Conclusion
The Caterpillar D7D is a robust piece of machinery engineered for heavy-duty agricultural environments where high drawbar pull and ground contact are critical requirements. Its mechanical configuration reflects the standard industrial-grade design of the late 1950s.
Production Information of Caterpillar, D7D
- Agricultural Crawler tractor
- Built in Peoria, Illinois, USA
| Manufacturer | Caterpillar |
|---|
Engine Specifications of Caterpillar, D7D
- Caterpillar
- Liquid-cooled
- Turbocharged diesel
- 4-cylinder
| Air cleaner | Oil bath |
|---|---|
| Displacement | 831 ci [13.6 L] |
| Compression | 15.7:1 |
| Bore/Stroke | 5.75x8.00 inches [146 x 203 mm] |
| Starter type | 2-cylinder pony engine |
| Rated RPM | 1200 |
Transmission Information of Caterpillar, D7D
Transmission variants 1
| Type | Gear |
|---|---|
| Oil capacity | 40 qts [37.9 L] |
| Gears | 5 forward and 4 reverse |
| Clutch | Dry metallic disc |
Transmission variants 2
| Type | Gear |
|---|---|
| Oil capacity | 40 qts [37.9 L] |
| Gears | 5 forward and 4 reverse |
| Clutch | Dry metallic disc |
Mechanical Specs of Caterpillar, D7D
- Open operator station.
- Contracting band brakes
| Drive | Crawler |
|---|---|
| Steering | Manual clutches |
Power Information of Caterpillar, D7D
- Https://www.tractordata.com/farm-tractors/011/1/4/11141-caterpillar-d7d-tests.html
Frequently asked questions
How much horsepower does the Caterpillar D7D have?
The Caterpillar D7D delivers unknown HP.
What years was the Caterpillar D7D produced?
The Caterpillar D7D was produced in 1959-1961.
What engine does the Caterpillar D7D have?
The Caterpillar D7D is powered by a Turbocharged diesel, 4-cylinder engine.
What transmission does the Caterpillar D7D use?
The Caterpillar D7D uses a Gear transmission.