Overview
The CO-OP Model 2 is a farm tractor produced by Duplex Machinery and distributed starting in 1936, featuring a row-crop configuration with an open operator station. It is powered by a 3.3L six-cylinder liquid-cooled Chrysler gasoline engine and a five-speed unsynchronized gear transmission.
Ideal Applications
Nebraska Tractor Test Results:
During Nebraska Tractor Test 275, this model recorded a maximum belt power of 33.17 hp and a maximum drawbar pull of 1,980 lbs while operating in its first gear.
Transmission and Drive Configuration:
The mechanical layout consists of a two-wheel drive system paired with an unsynchronized gear transmission offering five forward speeds and one reverse gear.
Chassis and Weight Specifications:
This tractor is built on a 124.75-inch long frame with an operating weight of 5,000 lbs and is equipped with 6.00-16 front and 11.25-28 rear ag tires.
Production
| Description | Row-Crop tractor / Built in Battle Creek, Michigan, USA |
|---|---|
| Distributor | CO-OP |
| Manufacturer | Duplex Machinery |
Engine
| Engine type | Chrysler 3.3L 6-cyl gasoline |
|---|---|
| Fuel tank | 22 gal (83.3 L) |
| Bore/Stroke | 3.125x4.375 inches (79 x 111 mm) |
| Coolant capacity | 18 qts (17.0 L) |
| Description | Chrysler / gasoline / 6-cylinder / liquid-cooled |
| Displacement | 201.3 ci (3.3 L) |
| Rated RPM | 1500 |
| Belt (tested) | 33.17 hp (24.7 kW) |
| Drawbar (tested) | 29.67 hp (22.1 kW) |
| Plows | 2 (14-inch) |
| PTO (tested) | 31.66 hp (23.6 kW) |
Transmission
| Gears | 5 forward and 1 reverse |
|---|---|
| Transmission type | 5-speed unsynchronized gear |
| Type | unsynchronized gear |
Mechanical
| Cab | Open operator station. |
|---|---|
| Drive type | Two-wheel drive |
Dimensions & Tires
| Ag front | 6.00-16 |
|---|---|
| Ag rear | 11.25-28 |
| Height | 57.5 inches (146 cm) |
| Length | 124.75 inches (316 cm) |
| Operating weight | 5,000 lbs (2268 kg) |
| Width | 76.5 inches (194 cm) |
| Front tire | 6.00-16 |
| Rear tire | 11.25-28 |
| Weight | 5,000 lbs (2268 kg) |
Nebraska Tractor Test 275
| Belt fuel use (max) | 3.5 gal/hour (13.2 l/hour) |
|---|---|
| Belt power (max) | 33.17 hp (24.7 kW) |
| Description | Gasoline 5-speed 2WDOctober 22 - November 10, 1936Link: Nebraska Tractor Test 275 file / PTO performance / Drawbar performance / Gear 3 used for power test. / Gear 1 used for pull test. |
| Fuel use | 2.9 gal/hour (11.0 l/hour) |
| Max power | 29.67 hp (22.1 kW) |
| Max pull | 1,980 lbs (898 kg) |
| Power at rated engine speed | 31.66 hp (23.6 kW) |