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Caterpillar R3

Caterpillar R3 tractor
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The Caterpillar R3 was an agricultural crawler tractor produced from 1934 to 1935. It was a special-order machine for the US Government, based on the Twenty-Eight model. Built in Peoria, Illinois, USA, only 60 units were made. It featured a Caterpillar 5.7L 4-cylinder liquid-cooled gasoline engine, a 3-speed gear transmission with dry disc clutch, and delivered 34.44 hp at the drawbar and 41.99 hp at the belt. The tractor had a crawler drive and an open operator station.
Caterpillar R3tractorcrawler tractoragricultural tractorCaterpillar engine5.7L engine3-speed transmissiontractor specs
Power46 hp[B]
Founded1934 - 1935
ModelR3

Technical Specifications

Detailed specifications and technical data for Caterpillar R3

Power

Belt (tested):41.99 hp (31.3 kW)
Drawbar (tested):34.44 hp (25.7 kW)

Engine

Make:Caterpillar
Type:gasoline
Cooling:liquid-cooled
Cylinders:4-cylinder
Rated RPM:1100
Air cleaner:oil bath
Bore/Stroke:4.50x5.50 inches (114 x 140 mm)
Fuel system:Ensign carburetor
Displacement:350 ci (5.7 L)

Mechanical

Drive:crawler
Operator station:Open operator station.

Production

Type:Agricultural Crawler tractor
Notes:The R3 was a special-order machine for the US Government, based on the Twenty-Eight.
Built in:Peoria, Illinois, USA
Total built:60
Years produced:1934 - 1935

Transmission

Type:gear
Gears:3 forward and 1 reverse
Clutch:dry disc