Tractor · 1936Unverified
CO-OP 3
CO-OP 3 — Standard-tread tractor · 37 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
37 hp
Max power
28.0 kW
Weight
2018 kg
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.