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Caterpillar R2

Caterpillar R2 tractor
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The Caterpillar R2 is an agricultural crawler tractor produced from 1934 to 1942 by Caterpillar in Peoria, Illinois, USA. A total of 2418 units were built in three main versions: 5E, 4J, and 6J. It features crawler drive with an open operator station. Engine options include a 4.1L 4-cylinder gasoline engine used on the 5E version and a 3.6L 4-cylinder gasoline Caterpillar 3400G engine used on the 4J and 6J versions. Transmission options include 3-speed and 5-speed gearboxes, with the 3-speed used on the 5E and the 5-speed on the 4J and 6J. The tractor has a tested drawbar power of 27.15 hp and belt power of 32.47 hp. It weighs 6350 lbs and runs on 13-inch wide tracks with gauges of 40 or 50 inches. The fuel tank capacity is 20 gallons.
Caterpillar R2tractorcrawler tractoragricultural tractorCaterpillar tractorR2 specsR2 engineR2 transmissionR2 dimensions
Power36 hp[B]
Founded1934 - 1942
ModelR2

Technical Specifications

Detailed specifications and technical data for Caterpillar R2

Power

Belt (tested):32.47 hp (24.2 kW)
Drawbar (tested):27.15 hp (20.2 kW)

Engine

Fuel tank:20 gal (75.7 L)
Rated RPM 5E:950
Air cleaner 5E:oil bath
Bore/Stroke 5E:4.00x5.00 inches (102 x 127 mm)
Engine options:Caterpillar 4.1L 4-cyl gasoline, Caterpillar 3.6L 4-cyl gasoline
Displacement 5E:251 ci (4.1 L)
Engine detail 5E:Caterpillar gasoline 4-cylinder liquid-cooled, Original engine, used on the 5E version.
Rated RPM 4J and 6J:1525
Air cleaner 4J and 6J:oil bath
Bore/Stroke 4J and 6J:3.75x5.00 inches (95 x 127 mm)
Displacement 4J and 6J:221 ci (3.6 L)
Oil capacity 4J and 6J:12 qts (11.4 L)
Engine detail 4J and 6J:Caterpillar 3400G gasoline 4-cylinder liquid-cooled, The 3400G was used on the 4J and 6J versions, which were most R-2 tractors built.
Coolant capacity 4J and 6J:28 qts (26.5 L)

Dimensions

Weight:6350 lbs (2880 kg)
Gauge 1:40 inches (101 cm)
Gauge 2:50 inches (127 cm)
Track width:13 inches (33 cm)

Mechanical

Drive:crawler
Operator station:Open operator station.

Production

Type:Agricultural Crawler tractor
4J built:1185
5E built:83
6J built:1150
Built in:Peoria, Illinois, USA
Total built:2418 (total)
Years produced:1934 - 1942

References

Reference:R2 Tractor published in 1938, by Caterpillar

Belt Pulley

RPM:950
Width:6.5 inches (16 cm)
Diameter:10.5 inches (26 cm)

Transmission

3-speed gear:Type: gear, Gears: 3 forward and 1 reverse, The three-speed was used on the 5E version, built in limited quantities until 1938.
5-speed gear:Type: gear, Gears: 5 forward and 1 reverse, Oil capacity: 8 qts (7.6 L), The five speed transmission was used on the R-2 4J and R-2 6J.
Transmission options:3-speed gear, 5-speed gear

Serial Number Location

Location:Serial number plate on the left side of the R-2 engine, below the rear spark plug.

Related Models

Caterpillar R2 Transmission

Model:R2 Transmission

Caterpillar R2 Dimensions

Model:R2 Dimensions

Caterpillar R2 Engine

Model:R2 Engine