Caterpillar RD4

Name: Caterpillar RD4
Brand: Caterpillar

Power

44 hp[B] hp

Production

1935-1940

Engine

Diesel, 4-cylinder

Transmission

Gear

40–60 HP 1930s 1940s

From the same series:

Introduction

Caterpillar RD4 Agricultural Crawler Tractor

The Caterpillar RD4 is an agricultural crawler tractor produced in Peoria, Illinois, USA, between 1935 and 1940. This machine belongs to the early series of Caterpillar track-type tractors, designed to provide high traction and stability for demanding agricultural applications.

Engine and Performance

The tractor is powered by a 4-cylinder, liquid-cooled diesel engine with a displacement of 312.1 cubic inches (5.1 liters). With a bore and stroke of 108 x 140 mm, the engine is rated at 1400 RPM, delivering 44 horsepower, which enables consistent performance during heavy-duty field operations.

Transmission and Drive

The RD4 utilizes a gear-type transmission providing 5 forward speeds and 1 reverse speed, managed by a dry disc clutch. The crawler drive system allows the machine to distribute its weight over a larger surface area, ensuring effective traction in difficult or soft soil conditions.

Operator Environment

Designed for simplicity and direct control, the machine features an open operator station. This configuration provides the operator with clear visibility of the surrounding work area, which is essential for precise maneuvering and agricultural tasks.

Conclusion

"The Caterpillar RD4 is a durable crawler tractor tailored for agricultural work where traction is critical. Its mechanical simplicity, combined with a robust diesel powertrain, makes it a notable machine from the 1935-1940 production era, suitable for heavy-duty field work and land preparation."

Introduction

Production Information of Caterpillar, RD4

The production information of the tractor (RD4) includes details about its manufacturing.

Agricultural Crawler tractor

Built in Peoria, Illinois, USA


Manufacturer	Caterpillar

Dimension and Tires Information of Caterpillar, RD4

This section sums up the dimension and tires information of the tractor.

No data available

Engine Specifications of Caterpillar, RD4

Get the specifications for the engine and if different options are available.

Caterpillar

Liquid-cooled

Diesel

4-cylinder


Rated RPM	1400
Displacement	312.1 ci [5.1 L]
Bore/Stroke	4.25x5.50 inches [108 x 140 mm]

Transmission Information of Caterpillar, RD4Y

Discover all variants of transmission available for this tractor model.

Transmission variants 1


Type	Gear
Gears	5 forward and 1 reverse
Clutch	Dry disc

Mechanical Specs of Caterpillar, RD4Y

This section summarizes all mechanical information such as the brake system and other specifications.

Open operator station.


Drive	Crawler

Power Information of Caterpillar, RD4Y

Discover the power specifications and options available for this tractor model but also PTO (Power Take-off) information.

Https://www.tractordata.com/farm-tractors/002/9/7/2976-caterpillar-rd4-tests.html

Frequently asked questions

How much horsepower does the Caterpillar RD4 have?

The Caterpillar RD4 delivers 44 hp[B] HP.

What years was the Caterpillar RD4 produced?

The Caterpillar RD4 was produced in 1935-1940.

What engine does the Caterpillar RD4 have?

The Caterpillar RD4 is powered by a Diesel, 4-cylinder engine.

What transmission does the Caterpillar RD4 use?

The Caterpillar RD4 uses a Gear transmission.

More Caterpillar models

5-Ton44 HP · 1925 - 1926 D444 HP · 1938 - 1959 R346 HP · 1934 - 1935 Twenty-Eight41 HP · 1933 - 1935 R440 HP · 1938 - 1944 Thirty40 HP · 1925 - 1938 Thirty-Five48 HP · 1932 - 1934 Diesel Thirty-Five50 HP · 1933 - 1934

View all 49 Caterpillar models →

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