| Manufacturer | J.I. Case |
| Price | 100,000(USD) |
| Model | 4890 |
| Equipment Type | Four-wheel Drive 4WD Tractors |
| Factory | Racine, Wisconsin, USA |
NEBRASKA TRACTOR TEST 1330 2
| Description | Diesel 12-speed 4WD October 22 - 29, 1979 Link: Nebraska Tractor Test 1330 file PTO performance Drawbar performance Gear 8 used for power test Gear 1I used for pull test |
| Power at rated engine speed | 253.41hp / 189.0kW |
| Fuel use | 15.4gal/hour / 58.3l/hour |
| Max power | 218.68hp / 163.1kW |
| Max pull | 27,627lbs / 12531kg |
J.I. CASE 4890 POWER
| Engine | 300hp / 223.7kW |
| Drawbar (claimed) | 224hp / 167.0kW |
| PTO (claimed) | 253hp / 188.7kW |
| Drawbar (tested) | 218.68hp / 163.1kW |
| PTO (tested) | 253.41hp / 189.0kW |
ENGINE DETAIL
The J.I. Case 4890 features a robust Saab-Scania turbocharged 6-cylinder engine with a substantial displacement of 11.0L, delivering 300hp at 2200 RPM, ideal for heavy-duty agricultural tasks. Its high compression ratio of 14.7:1 enhances fuel efficiency and torque output but may require high-quality diesel to prevent pre-ignition. With an oil capacity of 28.4 quarts and coolant capacity of 44 quarts, it emphasizes the need for diligent maintenance to ensure optimal performance and longevity under demanding conditions.
| Description | Saab-Scania turbocharged diesel 6-cylinder liquid-cooled |
| Displacement | 674ci / 11.0L |
| Bore/Stroke | 5.00x5.71inches / 127x 145mm |
| Power | 300hp / 223.7kW |
| Compression | 14.7:1 |
| Rated RPM | 2200 |
| Starter volts | 12 |
| Oil capacity | 28.4qts / 26.9L |
| Coolant capacity | 44qts / 41.6L |
J.I. CASE 4890 ENGINE
The J.I. Case 4890 features a robust Saab-Scania 11.0L 6-cylinder diesel engine, providing substantial torque and horsepower for demanding agricultural tasks. With a sizable 150-gallon fuel tank, the tractor is well-suited for extended operation without frequent refueling, making it advantageous for large-scale farming operations. However, the engine's complexity may pose maintenance challenges, requiring specialized knowledge and tools for effective service.
| Description | Saab-Scania 11.0L 6-cyl diesel |
| Fuel tank | 150gal / 567.8L |
TRANSMISSION
The J.I. Case 4890 tractor features a 12/4 partial powershift transmission, providing efficient gear shifting across four ranges, which is advantageous for applications requiring varied speeds and torque. The hydraulic dry disc clutch enhances durability but may require more precise handling to prevent slippage compared to wet clutch systems. With a moderate oil capacity of 52 quarts, ensure timely maintenance to optimize transmission performance and longevity.
| Transmission | partial powershift |
| Gears | 12 forward and 4 reverse |
| Clutch | hydraulic dry disc |
| Oil capacity | 52qts / 49.2L |
| Description | Four ranges with three power shifts in each range |
SPEEDS
| Description | With 23.1-30 tires |
MECHANICAL
The J.I. Case 4890's 4x4 configuration provides superior traction and stability, making it ideal for challenging terrains. The hydraulic steering, including four-wheel crab capabilities, enhances maneuverability in tight spaces, while the 12-speed transmission allows for optimal power management across various tasks. The air-conditioned Silent Guardian cab improves operator comfort during extended use, but may require additional maintenance to ensure efficiency.
| Chassis | 4x4 4WD |
| Steering | hydraulic, front, rear or four-wheel crab steering |
| Brakes | hydraulic dry disc |
| Cab | Silent Guardian cab standard with air-conditioning |
| Transmission | 12-speed |
HYDRAULICS
| Type | closed center PFC |
| Pressure | 2250psi / 155.1bar |
| Valves | 2 to 4 |
| Pump flow | 24gpm / 90.8lpm |
| Total flow | 31gpm / 117.3lpm |
TRACTOR HITCH
| Rear Type | III |
| Rear lift (at 24 | 12,750lbs / 5783kg |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Rear RPM | 1000 |
J.I. CASE 4890 TIRES
The J.I. Case 4890 tractor is equipped with Ag front tires sized 20.8-34, which enhance traction and stability in agricultural applications. The versatile rear tire options (20.8-34, 23.1-30, 24.5-32, and 30.5-32) allow customization based on load requirements and terrain, with larger tires improving flotation in softer soils. However, selecting the wrong tire size can lead to reduced maneuverability and increased soil compaction in specific scenarios.
| Ag front | 20.8-34 |
| Ag rear | 20.8-34 / 23.1-30 / 24.5-32 / 30.5-32 |
DIMENSIONS
| Wheelbase | 110inches / 279cm |
| Length | 243inches / 617cm |
| Width | 99inches / 251cm |
| Operating weight | 25,750lbs / 11680kg |
| Ballasted weight | 28,460lbs / 12909kg |
| Ground clearance | 18inches / 45cm |
| Front tread | 74 to 94inches / 187to 238cm |
| Rear tread | 74 to 94inches / 187to 238cm |
DIMENSIONS & TIRES
The J.I. Case 4890 tractor features a 110-inch wheelbase, providing stability and maneuverability, ideal for heavy-duty field applications. Weighing 25,750 lbs (11,680 kg) enables it to handle substantial loads, but can pose challenges in transportability or use in soft ground conditions. The uniform tire size of 18.4-34 enhances traction and flotation, making it suitable for diverse agricultural tasks while minimizing soil compaction.
| Wheelbase | 110inches / 279cm |
| Weight | 25,750lbs / 11680kg |
| Front tire | 18.4-34 |
| Rear tire | 18.4-34 |
ELECTRICAL
| Ground | negative |
| Charging system | alternator |
| Charging amps | 72 |
| Battery volts | 12 |