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CO-OP 3

CO-OP 3 tractor
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The CO-OP 3 is a standard-tread tractor built by Duplex Machinery and distributed by CO-OP from 1936 to 1950. It features a Chrysler 4.0L 6-cylinder liquid-cooled gasoline engine with a Zenith carburetor, producing a claimed 28 hp at the drawbar and 37 hp at the PTO. The tractor has a 5-speed gear transmission with dry disc clutch, two-wheel drive, and manual steering. It weighs 4450 lbs and rides on 7.50-16 front and 12.75-28 rear tires. The CO-OP 3 was manufactured in multiple US factories and is designed for general farm use with an open operator station.
CO-OP 3Duplex Machineryfarm tractor4.0L Chrysler engine5-speed transmission28 hp drawbar37 hp PTOstandard-tread tractor
Power41 hp[P]
Founded1936 - 1950
Model3

Technical Specifications

Detailed specifications and technical data for CO-OP 3

Power

Plows:3 *14-inch
Belt (tested):42.29 hp (31.5 kW)
PTO (claimed):37 hp (27.6 kW)
Drawbar (tested):37.50 hp (28.0 kW)
Drawbar (claimed):28 hp (20.9 kW)

Tires

Rear tire:12.75-28
Front tire:7.50-16

Engine

Make:Chrysler
Type:gasoline
Cooling:liquid-cooled
Cylinders:6-cylinder
Fuel tank:28 gal (106.0 L)
Rated RPM:1600
Bore/Stroke:3.375x4.50 inches (86 x 114 mm)
Fuel system:Zenith carburetor
Displacement:241.5 ci (4.0 L)
Coolant capacity:20 qts (18.9 L)

Dimensions

Width:75.6 inches (192 cm)
Height:62 inches (157 cm)
Length:132.25 inches (335 cm)
Shipping weight:4450 lbs (2018 kg)

Mechanical

Drive:Two-wheel drive
Steering:manual
Operator station:Open operator station

Production

Type:Standard-tread tractor
Factories:Battle Creek, Michigan, USA; South Saint Paul, Minnesota, USA; Arthurdale, West Virginia, USA
Distributor:CO-OP
Manufacturer:Duplex Machinery
Years produced:1936 - 1950

Transmission

Type:gear
Gears:5 forward and 1 reverse
Clutch:dry disc