Overview
The CO-OP B1 is a row-crop farm tractor manufactured by Cletrac in Cleveland, Ohio, between 1941 and 1942. It features a 1.9L Hercules four-cylinder gasoline engine and a gear transmission with three forward and one reverse speeds. Nebraska Tractor Test 323 recorded the unit producing a maximum of 19.29 belt horsepower and a maximum drawbar pull of 1,699 pounds.
Ideal Applications
Tested Drawbar Performance:
According to Nebraska Tractor Test 323, the tractor achieved a maximum drawbar output of 14.26 horsepower and a maximum pull of 1,699 pounds using gear one.
Belt Pulley Output:
The unit is equipped with a 9.5-inch diameter belt pulley operating at 1,065 RPM, resulting in a tested belt power of 19.29 horsepower.
Physical Configuration:
The tractor is built with an 80-inch wheelbase and has a documented shipping weight of 2,105 pounds which increases to 3,115 pounds when ballasted.
Production
| Description | Row-Crop tractor / Built in Cleveland, Ohio, USA |
|---|---|
| Distributor | CO-OP |
| Manufacturer | Cletrac |
| Total built | 7,527 |
Engine
| Engine type | Hercules 1.9L 4-cyl gasoline |
|---|---|
| Fuel tank | 12 gal (45.4 L) |
| Air cleaner | oil bath |
| Bore/Stroke | 3.00x4.00 inches (76 x 102 mm) |
| Compression | 5.75:1 |
| Coolant capacity | 12 qts (11.4 L) |
| Description | Hercules IXA3 / gasoline / 4-cylinder / liquid-cooled |
| Displacement | 113.12 ci (1.9 L) |
| Oil capacity | 5 qts (4.7 L) |
| Rated RPM | 1400 (drawbar) |
| Starter type | manual start |
| Belt (claimed) | 18 hp (13.4 kW) |
| Belt (tested) | 19.29 hp (14.4 kW) |
| Drawbar (tested) | 14.26 hp (10.6 kW) |
| Plows | 1 (14-inch) |
Transmission
| Clutch | 9-inch dry plate |
|---|---|
| Gears | 3 forward and 1 reverse |
| Oil capacity | 10 qts (9.5 L) |
| Transmission type | 3-speed gear |
| Type | gear |
Mechanical
| Cab | Open operator station. |
|---|---|
| Description | Manual steering |
| Drive type | Two-wheel drive |
PTO
| Mid PTO Type | 560 |
|---|
Dimensions & Tires
| Ag front | 5.50-16 |
|---|---|
| Ag rear | 9-24 |
| Ballasted weight | 3115 lbs (1412 kg) |
| Height (hood) | 55 inches (139 cm) |
| Length | 118 inches (299 cm) |
| Shipping weight | 2105 lbs (954 kg) |
| Wheelbase | 80 inches (203 cm) |
| Front tire | 5.50-16 |
| Rear tire | 9-24 |
| Weight | 2105 lbs (954 kg) |
| Wheelbase | 80 inches (203 cm) |
B1 Serial Numbers
| 1939 | 1FA000 |
|---|---|
| 1940 | 5FA388 |
| 1941 | 1FA0086 |
| 1942 | 1FA6532 |
| Description | FAQ: How to read a serial number table. |
Belt Pulley
| Diameter | 9.5 inches (24 cm) |
|---|---|
| RPM | 1065 |
| Speed | 2825 ft/min (861.06 meters/min) |
| Width | 5.5 inches (13 cm) |
Links
| Description | Cletrac General GG: article at Yesterday's Tractor Co |
|---|
Nebraska Tractor Test 323
| Belt power (max) | 19.29 hp (14.4 kW) |
|---|---|
| Description | Gasoline 3-speed 2WDAugust 10 - 30, 1939Link: Nebraska Tractor Test 323 file / Drawbar performance / Gear 3 used for power test. / Gear 1 used for pull test. |
| Max power | 14.26 hp (10.6 kW) |
| Max pull | 1699 lbs (770 kg) |