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Tractor · 1934Unverified

Caterpillar Forty

Name: Caterpillar Forty
Brand: Caterpillar

Caterpillar Forty — Agricultural Crawler tractor · 49 hp. Reference specifications; pending source verification.

The Caterpillar Forty tractor model is rated at approximately 49 hp, positioning it at the lower end of its class. It was produced from 1934 to 1936. The Forty is equipped with a 4-cylinder diesel liquid-cooled engine, paired with a tracked undercarriage featuring a 4-speed gearbox. Its operating weight is listed at 6180 kg, suitable for operations covering up to 200 acres.

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

Rated power

49 hp

Max power

31.2 kW

Weight

6180 kg

Catalogue coverage

Variants represented

Richest spec table

44 rows

Recorded power

49 hp

Recorded weight

6180 kg

Transmissions

4-speed gear

Production years

1934-1936

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

DrivecrawlerReference

Open operator station.Reference

Variants

Fortygas engineReference

Diesel Fortydiesel engineReference

Engine

Caterpillar 8.0L 4-cyl gasolineReference

Drawbar (tested)36.5 kWReference

Belt (tested)42.1 kWReference

CaterpillarReference

gasolineReference

4-cylinderReference

liquid-cooledReference

Displacement8.0 LReference

Bore/Stroke130 x 165 mmReference

Rated RPM850Reference

Belt power (max)36.2 kWReference

Max power31.2 kWReference

Belt power (max)42.1 kWReference

Max power36.5 kWReference

Transmission

4-speed gearReference

TypegearReference

Gears4 forward and 1 reverseReference

Dimensions

Weight6180 kgReference

16-inch tracksReference

Gauge142 cmReference

Forty Serial Numbers

19345G1Reference

19355G43Reference

19365G434Reference

Final5G584Reference

FAQ: How to read a serial number table.Reference

Caterpillar Forty Tracks

Width40 cmReference

Test results

NTTL 244: gasoline (850 RPM) 4-speed crawlerReference

NTTL 245: gasoline (1000 RPM) 4-speed crawlerReference

Gasoline (850 RPM) 4-speed crawlerSeptember 16 - 20, 1935Link: Nebraska Tractor Test 244 fileReference

Belt fuel use (max)22.3 l/hourReference

Drawbar performanceReference

Gear 2 used for power test.Reference

Max pull4396 kgReference

Gear 1 used for pull test.Reference

Gasoline (1000 RPM) 4-speed crawlerSeptember 18 - 23, 1935Link: Nebraska Tractor Test 245 fileReference

Belt fuel use (max)26.1 l/hourReference

Max pull4293 kgReference

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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