Tractor · 1934Unverified
Caterpillar R3
Caterpillar R3 — Agricultural Crawler tractor · 34 hp. Reference specifications; pending source verification.
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
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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.