Sources and field evidence
Catalog Archive: Baseline specifications compiled from historical manufacturer archives and equipment registries. Laboratory test report verification in progress.
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Engineering & Capability Benchmark
Specific output, tractive ratio, and segment percentile
Engine and power specifications
- Engine model
- Buda 6B230
- Fuel type
- Diesel
- Rated horsepower
- 47 hp
- Rated PTO Power
- 43 hp (CO-OP specification)
- Drawbar Power @ Rated Engine Speed
- 37.85 hp (Nebraska OECD Test 2218)
- Cylinders
- 6
- Displacement
- 3.8 L (230 ci)
- Bore / stroke
- 3.4375x4.125 inches 87 x 105 mm
- Rated RPM
- 1650 RPM
- Crankcase oil capacity
- N/A
- Coolant capacity
- N/A
Maintenance picks for the E4
Filters, oil and common wear parts for this model.
Transmission and chassis specifications
- Transmission type
- Gear (6F/2R)
- Gears (forward / reverse)
- 6 forward / 2 reverse
- Drive system
- 2WD
- Wheelbase
- 86.7 in
- Front tire
- N/A
- Rear tire
- N/A
- Hydraulic flow
- N/A
- Rear hitch
- N/A
Implement Draft & Ballast Matcher
Simulate draft resistance, drawbar power transfer, and optimal axle weight distribution for CO-OP E4.
Engine demand (83.4 HP) exceeds rated power (47 HP). Reduce working speed by 1.0-1.5 mph or reduce working width.
Catalog archival serial-number ranges
| Production year | Starting serial # | Ending serial # | Assembly plant |
|---|---|---|---|
| 1949 | #101 | #193 | Factory not specified |
| 1950 | #194 | #4,097 | Factory not specified |
| 1951 | #4,098 | #6,895 | Factory not specified |
| 1952 | #6,896 | #10,471 | Factory not specified |
| 1953 | #10,472 | #11,362 | Factory not specified |
| 1954 | #11,363 | #20,000 | Factory not specified |
| 1955 | #20,001 | #30,000 | Factory not specified |
| 1956 | #30,001 | #40,000 | Factory not specified |
| 1957 | #40,001 | #50,000 | Factory not specified |
| 1958 | #50,001 | End of run | Factory not specified |
Instant Used Market Valuation Projector
Algorithmic resale estimate for CO-OP E4 (1949)
Direct Segment Rivals & Showdowns
Head-to-head match-ups calibrated by horsepower and era
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CO-OP
USA • 15 Models
The CO-OP tractor brand emerged from a unique cooperative movement in the agricultural sector during the early 20th century. Founded in the 1930s, CO-OP tractors were conceived as a collaborative effort by farmers seeking affordable machinery through collective ownership and production. The brand's early models were designed by Dent Parrett, a former engineer from Parrett Tractor, and incorporated components from Chrysler, reflecting a pragmatic approach to manufacturing. Production initially took place in Michigan, but in 1938, the operation relocated to Indiana, signaling a period of growth and expansion. The brand's portfolio was further enriched by contributions from Cletrac, with some production also occurring in Saint Paul, Minnesota. A significant development came after World War II when CO-OP entered into an agreement with Cockshutt, leading to the introduction of the 'E' series tractors, which were essentially rebranded Cockshutt models. Despite these efforts, CO-OP faced challenges in the marketplace, and by 1952, the brand's facilities were sold to Cockshutt due to poor sales performance. This marked the end of the CO-OP tractor brand, which was subsequently discontinued.
View Full CO-OP Lineup