| Manufacturer | CaseIH |
| Price | - |
| Model | STX425 |
| Equipment Type | Four-wheel Drive 4WD Tractors |
| Factory | Fargo, North Dakota, USA |
CASEIH STX425 POWER
| Engine | 425hp / 316.9kW |
| Drawbar (claimed) | 345hp / 257.3kW |
| PTO (claimed) | 370hp / 275.9kW |
ENGINE DETAIL
The CaseIH STX425 tractor is equipped with a highly efficient Cummins QSX15 engine, delivering 425 hp and a robust torque rating of 1594 lb-ft at 1400 RPM, which is advantageous for heavy-duty applications and demanding field tasks. The manual transmission limits torque output to 1501 lb-ft, potentially impacting performance in high-load scenarios. Given its large 15.0L engine displacement, users can expect reliable performance for tasks such as tillage and hauling, although fuel efficiency may be a challenge in comparison to smaller tractors.
| Description | Cummins QSX15 turbocharged aftercooled diesel 6-cylinder liquid-cooled When equipped with the manual transmission the STX425 engine is limited to 1501 lb-ft of torque. |
| Displacement | 915ci / 15.0L |
| Bore/Stroke | 5.39x6.65inches / 137x 169 mm |
| Power | 425hp / 316.9kW |
| Air cleaner | dual paper elements |
| Rated RPM | 2000 |
| Torque | 1594 lb-ft /2161.5 Nm |
| Torque RPM | 1400 |
| Starter volts | 12 |
CASEIH STX425 ENGINE
The CaseIH STX425 features a robust Cummins 15.0L 6-cylinder diesel engine, providing substantial power and torque for heavy-duty operations. With a substantial 300-gallon fuel tank, it offers extended runtime capabilities, reducing the need for frequent refueling during long work sessions. However, the large size may pose challenges in maneuverability on smaller farms or tight spaces.
| Description | Cummins 15.0L 6-cyl diesel |
| Fuel tank | 300gal / 1135.5L |
TRANSMISSIONS OVERVIEW
The CaseIH STX425 tractor features a 16-speed full power shift transmission, providing seamless power transfer with minimal loss of momentum, optimal for heavy-duty applications. Additionally, the 24-speed fully synchronized option allows for smoother gear changes, enhancing operator control during varying field conditions. When selecting between these transmission types, consider the expected workload and terrain, as the power shift is advantageous for consistent heavy-load performance, while the synchronized option is ideal for precision operations in diverse environments.
| Description | 16-speed full power shift 24-speed fully synchronized |
TRANSMISSION 1
The CaseIH STX425 features a full power shift transmission with 16 forward and 2 reverse gears, providing smooth and efficient power delivery for heavy-duty applications. The electro-hydraulic wet disc clutch enhances durability and reduces wear, making it ideal for extended operation in rugged conditions. However, its complexity may require specialized maintenance, impacting long-term operational costs.
| Type | full power shift |
| Gears | 16 forward and 2 reverse |
| Clutch | electro-hydraulic wet disc |
TRANSMISSION 2
The CaseIH STX425 features a fully synchronized Synchroshift transmission, providing seamless gear shifts for enhanced operator control and productivity. With 24 forward and 6 reverse gears, it offers versatile speed adjustments suitable for various field tasks and conditions. However, the complexity of synchronized systems may require more maintenance and could be a challenge for operators unfamiliar with them.
| Transmission | Synchroshift |
| Type | fully synchronized |
| Gears | 24 forward and 6 reverse |
MECHANICAL
The CaseIH STX425 features an articulated 4WD chassis, which enhances maneuverability and traction in a variety of terrains, making it suitable for heavy tillage and large implement applications. Its inboard planetary final drives offer durability for demanding tasks, while the hydrostatic power steering provides ease of handling, particularly in tight spaces. The 16-speed full power shift transmission is advantageous for seamless gear changes under load, whereas the 24-speed option allows for finer control over speed, optimizing performance in diverse agricultural scenarios.
| Chassis | 4x4 articulated 4WD |
| Final drives | inboard planetary (standard)/compound planetary (HD/scraper) |
| Steering | hydrostatic power |
| Brakes | integrated hydraulic wet disc |
| Cab | Surveyor Cab standard. |
| Transmissions | 16-speed full power shift/24-speed fully synchronized |
HYDRAULICS
| Type | pressure flow compensated (PFC) |
| Rear valves | 4 to 7 |
| Pump flow | 40gpm / 151.4lpm/55gpm / 208.2lpm |
TRACTOR HITCH
| Rear Type | IVN/III |
| Rear lift (at 24 | 19500lbs / 8845kg |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Rear RPM | 1000 (1.75) |
DIMENSIONS
| Wheelbase | 154inches / 391cm |
| Length | 317.5inches / 806cm |
| Width | 44inches / 111cm (frame) |
| Height | 152.1inches / 386cm |
| Front axle | 4.5 inch diameter /114 mm |
| Rear axle | 4.5 inch diameter /114 mm |
| Rear tread | 60 to 176inches / 152to 447 cm |
CASEIH STX425 WEIGHT
| Max capacity | 51000lbs / 23133kg |
| Max Drawbar | 5300lbs / 2404kg/11000lbs / 4989kg *Drawbar at innermost position. |
DIMENSIONS & TIRES
The CaseIH STX425 tractor, with a wheelbase of 154 inches (391 cm), offers enhanced stability and improved weight distribution during field operations, making it suitable for heavy tillage and pulling applications. However, the longer wheelbase may reduce maneuverability in tighter spaces, which could be a challenge in smaller fields or when navigating obstacles. Overall, this tractor is ideal for large-scale agricultural operations that require robust power and stability for demanding tasks.
| Wheelbase | 154inches / 391cm |
STX425 SERIAL NUMBERS
| 2002 | JEE0099501 |
| 2003 | JEE0102001 |
| 2004 | JEE0104001 |
| 2005 | JEE0105701 |
| 2006 | JEE0108501 |
ELECTRICAL
| Ground | negative |
| Charging system | alternator |
| Battery volts | 12 |