Embed

Paste on your site — shows live UK/US specs and links back here. Free to use.

<iframe src="https://farmfleetspecs.com/embed/caterpillar-diesel-forty" width="100%" height="430" loading="lazy" style="border:1px solid #e6e8e4;border-radius:14px;max-width:560px" title="Caterpillar Diesel Forty specs — FarmFleetSpecs"></iframe>

Tractor · 1934Unverified

Caterpillar Diesel Forty

Name: Caterpillar Diesel Forty
Brand: Caterpillar

Caterpillar Diesel Forty — Agricultural Crawler tractor · 50 hp. Reference specifications; pending source verification.

The Caterpillar Diesel Forty is a tractor model with a rated power of 50 hp, which positions it towards the lower end of its class in terms of power output. Manufactured between 1934 and 1936, this model features a 3-cylinder diesel liquid-cooled engine, paired with a tracked undercarriage and a 4-speed gearbox. The Caterpillar Diesel Forty has an operating weight of 7095 kg. It is suitable for operations on areas up to 200 acres.

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

Rated power

50 hp

Max power

37.6 kW

Weight

7095 kg

Catalogue coverage

Variants represented

Richest spec table

48 rows

Recorded power

50 hp

Recorded weight

7095 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 stationReference

Variants

Fortygas engineReference

Diesel Fortydiesel engineReference

Engine

Caterpillar 10.2L 3-cyl dieselReference

Fuel tank170.3 LReference

Drawbar (tested)37.6 kWReference

Belt (tested)41.8 kWReference

Caterpillar D6600Reference

dieselReference

3-cylinderReference

liquid-cooledReference

Displacement10.2 LReference

Bore/Stroke146 x 203 mmReference

Rated RPM1000Reference

Belt power (max)41.8 kWReference

Max power37.6 kWReference

Belt power (max)36.2 kWReference

Max power31.9 kWReference

Transmission

4-speed gearReference

TypegearReference

Gears4 forward and 1 reverseReference

Dimensions

Weight7095 kgReference

16-inch tracksReference

Gauge142 cmReference

Gauge187 cmReference

Diesel Forty Serial Numbers

19343G1Reference

19353G335Reference

19363G1957Reference

Final3G1971Reference

FAQ: How to read a serial number table.Reference

Caterpillar Diesel Forty Tracks

Width40 cmReference

Test results

NTTL 242: diesel (1000 RPM) 4-speed crawlerReference

NTTL 243: diesel (850 RPM) 4-speed crawlerReference

Diesel (1000 RPM) 4-speed crawlerAugust 19 - September 9, 1935Link: Nebraska Tractor Test 242 fileReference

Belt fuel use (max)15.5 l/hourReference

Drawbar performanceReference

Gear 2 used for power test.Reference

Max pull4422 kgReference

Gear 2 used for pull test.Reference

Diesel (850 RPM) 4-speed crawlerSeptember 10 - 12, 1935Link: Nebraska Tractor Test 243 fileReference

Belt fuel use (max)12.9 l/hourReference

Gear 1 used for power test.Reference

Max pull4396 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.

Partner tool · Free

Working out if you can afford this tractor?

YourIncomeCalculator.com — free, HMRC-aligned take-home pay, self-employment & VAT calculators. No sign-up.

Calculate your take-home pay

Recommended kit

Handy kit for owners

Popular tractor and farm accessories owners pick up for machines like this.

Disclosure: some links on this page are affiliate links. If you buy through them we may earn a small commission — at no extra cost to you. Learn more.