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Tractor · 1936Unverified

CO-OP 3

Name: CO-OP 3
Brand: CO-OP

CO-OP 3 — Standard-tread tractor · 37 hp. Reference specifications; pending source verification.

The CO-OP 3 is a tractor with a rated output of 37 hp, offering a compact design within its class. It was manufactured from 1936 to 1950 and features a 6-cylinder petrol liquid-cooled engine. The tractor is equipped with a two-wheel drive system and a 5-speed gearbox. Its listed weight is 2018 kg, making it suitable for tasks on areas of approximately 200 acres.

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

Rated power

37 hp

Max power

28.0 kW

Weight

2018 kg

Catalogue coverage

Variants represented

Richest spec table

46 rows

Recorded power

37 hp

Recorded weight

2018 kg

Transmissions

5-speed gear

Production years

1936-1950

Verified variants

No linked source document is currently displayed; verify critical figures with the manufacturer or dealer.

Hover a source tag to verify

Overview

DistributorCO-OPReference

ManufacturerDuplex MachineryReference

Standard-tread tractorReference

FactoriesBattle Creek, Michigan, USAReference

FactoriesSouth Saint Paul, Minnesota, USAReference

FactoriesArthurdale, West Virginia, USAReference

Two-wheel driveReference

SteeringmanualReference

Open operator stationReference

Engine

Chrysler 4.0L 6-cyl gasolineReference

Fuel tank106.0 LReference

Drawbar (claimed)20.9 kWReference

Plows3Reference

Drawbar (tested)28.0 kWReference

Belt (tested)31.5 kWReference

ChryslerReference

gasolineReference

6-cylinderReference

liquid-cooledReference

Displacement4.0 LReference

Bore/Stroke86 x 114 mmReference

Fuel systemZenith carburetorReference

Rated RPM1600Reference

Coolant capacity18.9 LReference

Belt power (max)31.5 kWReference

Max power28.0 kWReference

Transmission

5-speed gearReference

TypegearReference

Gears5 forward and 1 reverseReference

Clutchdry discReference

PTO & Hydraulics

PTO (claimed)27.6 kWReference

Dimensions

Weight2018 kgReference

Front tire7.50-16Reference

Rear tire12.75-28Reference

Ag front7.50-16Reference

Ag rear12.75-28Reference

Length335 cmReference

Width192 cmReference

Height157 cmReference

Shipping weight2018 kgReference

3 Serial Number Location

Left side of dashboardReference

Test results

Gasoline 5-speed 2WDOctober 22 - November 5, 1936Link: Nebraska Tractor Test 274 fileReference

Drawbar performanceReference

Gear 3 used for power test.Reference

Max pull1215 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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