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Tractor · 1934Unverified

Caterpillar R3

Name: Caterpillar R3
Brand: Caterpillar

Caterpillar R3 — Agricultural Crawler tractor · 34 hp. Reference specifications; pending source verification.

The Caterpillar R3 is a tractor model rated at 34 hp — making it one of the more compact options in its class. The R3 was manufactured from 1934 to 1935. Power comes from a 4-cylinder petrol liquid-cooled engine, driving through a tracked undercarriage with a 3-speed gearbox. It is aimed at jobs of around up to 200 ac. Available dimensions and performance figures follow in both unit systems.

Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.

Rated power

34 hp

Max power

25.7 kW

Catalogue coverage

Variants represented

Richest spec table

32 rows

Recorded power

34 hp

Transmissions

3-speed gear

Production years

1934-1935

Verified variants

No linked source document is currently displayed; verify critical figures with the manufacturer or dealer.

Hover a source tag to verify

Overview

ManufacturerCaterpillarReference

Agricultural Crawler tractorReference

Built in Peoria, Illinois, USAReference

Total built60Reference

The R3 was a special-order machine for the US Government, based on the Twenty-Eight.Reference

DrivecrawlerReference

Open operator station.Reference

Engine

Caterpillar 5.7L 4-cyl gasolineReference

Drawbar (tested)25.7 kWReference

Belt (tested)31.3 kWReference

CaterpillarReference

gasolineReference

4-cylinderReference

liquid-cooledReference

Displacement5.7 LReference

Bore/Stroke114 x 140 mmReference

Fuel systemEnsign carburetorReference

Air cleaneroil bathReference

Rated RPM1100Reference

Belt power (max)31.3 kWReference

Max power25.7 kWReference

Transmission

3-speed gearReference

TypegearReference

Gears3 forward and 1 reverseReference

Clutchdry discReference

Dimensions

TracksReference

Test results

Gasoline 3-speed crawlerSeptember 26 - October 15, 1934Link: Nebraska Tractor Test 227 fileReference

Belt fuel use (max)18.5 l/hourReference

Drawbar performanceReference

Gear 2 used for power test.Reference

Max pull3457 kgReference

Gear 1 used for pull test.Reference

Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.

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