Overview
The CO-OP Model 3 is a standard-tread farm tractor produced between 1936 and 1950 by Duplex Machinery in Battle Creek, Michigan. It is powered by a 4.0L Chrysler 6-cylinder gasoline engine and a five-speed gear transmission, resulting in a tested belt power of 42.29 hp. The machine features an open operator station, manual steering, and a shipping weight of 4450 lbs.
Ideal Applications
Tested Drawbar and Pull Performance:
Under Nebraska Tractor Test 274, the tractor achieved a maximum drawbar power of 37.50 hp and a maximum pull of 2,679 lbs in first gear.
Engine and Fuel Specifications:
The liquid-cooled 241.5 ci engine is equipped with a Zenith carburetor, a 28-gallon fuel tank, and is rated at 1600 RPM.
Chassis and Tire Configuration:
This two-wheel-drive model measures 75.6 inches in width and utilizes 7.50-16 front tires and 12.75-28 rear tires.
Production
| Description | Standard-tread tractor |
|---|---|
| Distributor | CO-OP |
| Factories | Battle Creek, Michigan, USA |
| Manufacturer | Duplex Machinery |
Engine
| Engine type | Chrysler 4.0L 6-cyl gasoline |
|---|---|
| Fuel tank | 28 gal (106.0 L) |
| Bore/Stroke | 3.375x4.50 inches (86 x 114 mm) |
| Coolant capacity | 20 qts (18.9 L) |
| Description | Chrysler / gasoline / 6-cylinder / liquid-cooled |
| Displacement | 241.5 ci (4.0 L) |
| Fuel system | Zenith carburetor |
| Rated RPM | 1600 |
| Belt (tested) | 42.29 hp (31.5 kW) |
| Drawbar (claimed) | 28 hp (20.9 kW) |
| Drawbar (tested) | 37.50 hp (28.0 kW) |
| Plows | 3 *14-inch |
| PTO (claimed) | 37 hp (27.6 kW) |
Transmission
| Clutch | dry disc |
|---|---|
| Gears | 5 forward and 1 reverse |
| Transmission type | 5-speed gear |
| Type | gear |
Mechanical
| Cab | Open operator station |
|---|---|
| Drive type | Two-wheel drive |
| Steering | manual |
Dimensions & Tires
| Ag front | 7.50-16 |
|---|---|
| Ag rear | 12.75-28 |
| Height | 62 inches (157 cm) |
| Length | 132.25 inches (335 cm) |
| Shipping weight | 4450 lbs (2018 kg) |
| Width | 75.6 inches (192 cm) |
| Front tire | 7.50-16 |
| Rear tire | 12.75-28 |
| Weight | 4450 lbs (2018 kg) |
3 Serial Number Location
| Description | Left side of dashboard |
|---|
Nebraska Tractor Test 274
| Belt power (max) | 42.29 hp (31.5 kW) |
|---|---|
| Description | Gasoline 5-speed 2WDOctober 22 - November 5, 1936Link: Nebraska Tractor Test 274 file / Drawbar performance / Gear 3 used for power test. / Gear 1 used for pull test. |
| Max power | 37.50 hp (28.0 kW) |
| Max pull | 2,679 lbs (1215 kg) |