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Tractor · 1935Unverified

Caterpillar RD4

Name: Caterpillar RD4
Brand: Caterpillar

Caterpillar RD4 — Agricultural Crawler tractor · 35 hp. Reference specifications; pending source verification.

The Caterpillar RD4 is a tractor rated at 35 hp — making it one of the more compact options in its class. This model was manufactured from 1935 to 1940. It is powered by a 4-cylinder diesel liquid-cooled engine, driving through a tracked undercarriage with a 5-speed gearbox. It is aimed at jobs of around up to 200 ac. The available specification table below shows both UK and US units.

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

Rated power

35 hp

Max power

26.1 kW

Catalogue coverage

Variants represented

Richest spec table

35 rows

Recorded power

35 hp

Transmissions

5-speed gear

Production years

1935-1940

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

Engine

Caterpillar 5.1L 4-cyl dieselReference

Drawbar (tested)26.1 kWReference

Belt (tested)29.7 kWReference

CaterpillarReference

dieselReference

4-cylinderReference

liquid-cooledReference

Displacement5.1 LReference

Bore/Stroke108 x 140 mmReference

Rated RPM1400Reference

Belt power (max)29.7 kWReference

Max power26.1 kWReference

Transmission

5-speed gearReference

TypegearReference

Gears5 forward and 1 reverseReference

Clutchdry discReference

Dimensions

TracksReference

Gauge111 cmReference

Gauge152 cmReference

RD4 Serial Numbers

19364G1Reference

19374G3663Reference

19384G8858Reference

19394G9912Reference

FAQ: How to read a serial number table.Reference

Test results

Diesel 5-speed crawlerOctober 14 - 28, 1936Link: Nebraska Tractor Test 273 fileReference

Belt fuel use (max)11.0 l/hourReference

Drawbar performanceReference

Gear 2 used for power test.Reference

Max pull3561 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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