CO-OP 3 tractor specifications

1936 - 1950

1936 - 1950 Standard-tread tractorDuplex Machinery built

Production

Production Distributor:CO-OP
Manufacturer:Duplex Machinery
Type:Standard-tread tractor
Factories:Battle Creek, Michigan, USA
South Saint Paul, Minnesota, USA
Arthurdale, West Virginia, USA

CO-OP 3 Power

CO-OP 3 Power Drawbar (claimed):28 hp
20.9 kW
PTO (claimed):37 hp
27.6 kW
Plows:3*14-inch
Drawbar (tested):37.50 hp
28.0 kW
Belt (tested):42.29 hp
31.5 kW
power test details ...

1936 - 1950

Standard-tread tractor

Duplex Machinery built

Nebraska Tractor Test 274

Nebraska Tractor Test 274
Gasoline 5-speed 2WD October 22 - November 5, 1936 Link: Nebraska Tractor Test 274 file
Belt power (max):	42.29 hp 31.5 kW
Drawbar performance
Max power:	37.50 hp 28.0 kW
Gear 3 used for power test.
Max pull:	2,679 lbs 1215 kg
Gear 1 used for pull test.

CO-OP 3 Engine

CO-OP 3 Engine Chrysler 4.0L 6-cyl gasoline Fuel tank:28 gal
106.0 L
Engine details ...

1936 - 1950

Standard-tread tractor

Duplex Machinery built

Engine Detail

Engine Detail
Chrysler
gasoline
6-cylinder
liquid-cooled
Displacement:	241.5 ci 4.0 L
Bore/Stroke:	3.375x4.50 inches 86 x 114 mm
Fuel system:	Zenith carburetor
Rated RPM:	1600
Coolant capacity:	20 qts 18.9 L