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Tractor · 1925Unverified

Caterpillar Thirty

Name: Caterpillar Thirty
Brand: Caterpillar

Caterpillar Thirty — Agricultural Crawler tractor · 31 hp. Reference specifications; pending source verification.

The Caterpillar Thirty is a tractor with an output of approximately 31 horsepower, positioning it at the lower end of its class. Produced from 1925 to 1938, this model features a 4-cylinder, petrol, liquid-cooled engine and is equipped with a tracked undercarriage paired with a 3-speed gearbox. It is suitable for use on areas of up to 200 acres. Detailed specifications for the Caterpillar Thirty are as follows.

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

Rated power

31 hp

Max power

23.0 kW

Catalogue coverage

Variants represented

Richest spec table

45 rows

Recorded power

31 hp

Transmissions

3-speed gear

Production years

1925-1938

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

FactoriesSan Leandro, California, USAReference

FactoriesPeoria, Illinois, USAReference

The Caterpillar model Thirty is a continuation of the Best model Thirty, which had been in production since 1921Reference

DrivecrawlerReference

Open operator station.Reference

Engine

Caterpillar 7.6L 4-cyl gasolineReference

Fuel tank141.9 LReference

Aux. fuel9.8 LReference

Drawbar (tested)23.0 kWReference

Belt (tested)27.1 kWReference

CaterpillarReference

gasolineReference

4-cylinderReference

liquid-cooledReference

Displacement7.6 LReference

Bore/Stroke121 x 165 mmReference

Fuel systemZenith K5A carburetorReference

Air cleaneroil bathReference

Rated RPM1400Reference

Belt power (max)27.1 kWReference

Max power23.0 kWReference

Transmission

3-speed gearReference

5-speed gearReference

TypegearReference

Gears3 forward and 1 reverseReference

Gears5 forward and 1 reverseReference

Clutchdry discReference

Dimensions

13-inch tracksReference

Gauge111 cmReference

Gauge154 cmReference

Capacities

Diameter30 cmReference

Width21 cmReference

RPM840Reference

Caterpillar Thirty Tracks

Width33 cmReference

Width40 cmReference

Width45 cmReference

Width60 cmReference

Width76 cmReference

Test results

Distillate 5-speed crawlerOctober 13 - 24, 1936Link: Nebraska Tractor Test 272 fileReference

Drawbar performanceReference

Gear 2 used for power test.Reference

Max pull2776 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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