CaseIH STX425
Power
425 hp
Production
2002-2006
Engine
Turbocharged aftercooled diesel, 6-cylinder
Transmission
Full power shift
Drive
4WD
From the same series:
Introduction
Case IH STX425 Four-Wheel Drive Tractor
The Case IH STX425 is a heavy-duty four-wheel drive tractor produced between 2002 and 2006 at the Fargo, North Dakota facility. Designed for large-scale agricultural operations, this model belongs to the STX series and focuses on high-horsepower traction and implement management.
Engine and Performance
The tractor is powered by a 14.9-liter (912 ci) six-cylinder turbocharged and aftercooled diesel engine. It delivers a rated power of 425 hp (316.9 kW) at 2000 RPM, with a peak torque of 1594 lb-ft (2161.5 Nm) at 1400 RPM. When configured with a manual transmission, torque is limited to 1501 lb-ft. The engine utilizes a liquid-cooling system and a dual-element air cleaner to maintain operational efficiency under heavy loads.
Transmission and Drivetrain
Two transmission configurations were available: a 16-speed full power shift or a 24-speed fully synchronized Synchroshift. Both systems utilize an electro-hydraulic wet disc clutch. The drivetrain features four-wheel drive with standard inboard planetary final drives, supplemented by compound planetary drives for scraper or heavy-duty configurations.
Hydraulics and Hitch
The hydraulic system is a pressure flow compensated (PFC) type, providing a total flow of 40 gpm (151.4 lpm), with an optional capacity of up to 55 gpm (208.2 lpm). It supports 4 to 7 rear valves and an SCV flow of 35 gpm (132.5 lpm). The rear hitch is a category IVN/III configuration, offering a lift capacity of 19,500 lbs (8845 kg) at 24 inches behind the lift point.
Mechanical and Dimensions
The chassis is built on a 154-inch (391 cm) wheelbase with a total length of 317.5 inches (806 cm). It features hydrostatic power steering and integrated hydraulic wet disc brakes. The tractor is equipped with the Surveyor Cab as standard, which provides the operator with visibility and comfort. Both front and rear axles are reinforced with 4.5-inch diameter shafts to support the machine's weight and traction requirements.
Conclusion
The Case IH STX425 is engineered for high-draft agricultural applications, combining significant hydraulic output, high torque, and multiple transmission options. It remains a capable machine for professional operations requiring sustained performance and heavy implement handling.
Production Information of CaseIH, STX425
- Four-wheel Drive (4WD) tractor
- Built in Fargo, North Dakota, USA
| Manufacturer | CaseIH |
|---|
Dimension and Tires Information of CaseIH, STX425
| Rear tread | 60 to 176 inches [152 to 447 cm] |
|---|---|
| Wheelbase | 154 inches [391 cm] |
| Front axle | 4.5 inch diameter [114 mm] |
| Height | 152.1 inches [386 cm] |
| Length | 317.5 inches [806 cm] |
| Rear axle | 4.5 inch diameter [114 mm] |
| Width | 44 inches (frame) [111 cm] |
Engine Specifications of CaseIH, STX425
- When equipped with the manual transmission the STX425 engine is limited to 1501 lb-ft of torque.
- Liquid-cooled inline
- Turbocharged aftercooled diesel
- 6-cylinder
| Torque | 1594 lb-ft [2161.5 Nm] |
|---|---|
| Power | 425 hp [316.9 kW] |
| Displacement | 912 ci [14.9 L] |
| Starter volts | 12 |
| Torque RPM | 1400 |
| Rated RPM | 2000 |
| Air cleaner | Dual paper elements |
| Bore/Stroke | 5.39x6.65 inches [137 x 169 mm] |
Transmission Information of CaseIH, STX425
Transmission variants 1
| Type | Full power shift |
|---|---|
| Gears | 16 forward and 2 reverse |
| Clutch | Electro-hydraulic wet disc |
Transmission variants 2
| Transmission | Synchroshift |
|---|---|
| Type | Fully synchronized |
| Gears | 24 forward and 6 reverse |
- 16-speed full power shift
- 24-speed fully synchronized
Mechanical Specs of CaseIH, STX425
- Four-wheel drive
- Integrated hydraulic wet disc brakes
- Surveyor Cab standard.
| Steering | Hydrostatic power |
|---|---|
| Final drives | Inboard planetary (standard) |
| Final drives(optional) | Compound planetary (HD/scraper) |
Power Information of CaseIH, STX425
| Rear PTO(optional) | Independent |
|---|---|
| Rear PTO Type | 1000 (1.75) |
Hydraulics Specifications of CaseIH, STX425
| Type | Pressure flow compensated (PFC) |
|---|---|
| Type(optional) | 55 gpm [208.2 lpm] |
| Total flow | 40 gpm [151.4 lpm] |
| Rear valves | 4 to 7 |
| SCV flow | 35 gpm [132.5 lpm] |
Three-Point Hitch of CaseIH, STX425
| Rear Type | IVN/III |
|---|---|
| Rear lift (at 24"/610mm) | 19500 lbs [8845 kg] |
Electrical System of CaseIH, STX425
| Ground | Negative |
|---|---|
| Charging system | Alternator |
| Battery volts | 12 |
Where it sits
With 425 HP, the CaseIH STX425 sits between STX375 (375 HP) and STX430 (430 HP) in CaseIH's range. Its power puts it in the 98th percentile of 2000s models in our database (2822 machines).
Frequently asked questions
How much horsepower does the CaseIH STX425 have?
The CaseIH STX425 delivers 425 HP.
What years was the CaseIH STX425 produced?
The CaseIH STX425 was produced in 2002-2006.
What engine does the CaseIH STX425 have?
The CaseIH STX425 is powered by a Turbocharged aftercooled diesel, 6-cylinder engine.
What transmission does the CaseIH STX425 use?
The CaseIH STX425 uses a Full power shift transmission.
Is the CaseIH STX425 4WD?
The CaseIH STX425 is available in 4WD.