CaseIH
CaseIH STX425QT Quadtrac
The CaseIH STX425QT Quadtrac is an articulated crawler tractor produced from 2002 to 2006 as part of the Steiger STX Series. It features a powerful Cummins QSX15 15.0L 6-cylinder turbocharged aftercooled diesel engine delivering 425 hp (316.9 kW) with a 16-speed full power shift transmission. The tractor is equipped with articulated crawler drive, inboard planetary final drives, hydrostatic power steering, and integrated hydraulic wet disc brakes. It has a 300-gallon fuel tank and offers a pressure flow compensated hydraulic system with 4 to 7 rear valves. The rear hitch is IVN/III type with a lift capacity of 19,500 lbs at 24 inches. The rear PTO is independent and optional, rated at 1000 RPM. Dimensions include a 154-inch wheelbase and track widths of 30 or 36 inches. The tractor weighs up to 53,264 lbs and was built in Fargo, North Dakota, USA.
Power-
Founded-
ModelSTX425QT
Technical Specifications
Detailed specifications and technical data for CaseIH STX425QT Quadtrac
Power
| Engine | 425 hp (316.9 kW) |
|---|---|
| PTO (claimed) | 370 hp (275.9 kW) |
Engine
| Type | turbocharged aftercooled diesel |
|---|---|
| Model | Cummins QSX15 |
| Power | 425 hp (316.9 kW) |
| Torque | 1594 lb-ft (2161.5 Nm) |
| Cooling | liquid-cooled |
| Cylinders | 6-cylinder |
| Fuel tank | 300 gal (1135.5 L) |
| Rated RPM | 2000 |
| Torque RPM | 1400 |
| Air cleaner | dual paper elements |
| Bore/Stroke | 5.39x6.65 inches (137 x 169 mm) |
| Displacement | 915 ci (15.0 L) |
| Starter volts | 12 |
Tracks
| Width | 30 inches (76 cm), 36 inches (91 cm) |
|---|
Weight
| Max Drawbar | 5300 lbs (2404 kg) |
|---|---|
| Max capacity | 53264 lbs (24160 kg) |
| Optional Drawbar | 11000 lbs (4989 kg) |
Variants
| STX425 | wheeled tractor |
|---|---|
| STX425QT | crawler tractor |
Electrical
| Ground | negative |
|---|---|
| Battery volts | 12 |
| Charging system | alternator |
Hydraulics
| Type | pressure flow compensated (PFC) |
|---|---|
| Pump flow | 40 gpm (151.4 lpm) |
| Rear valves | 4 to 7 |
| Optional pump flow | 55 gpm (208.2 lpm) |
Mechanical
| Cab | Surveyor Cab standard |
|---|---|
| Drive | articulated crawler |
| Brakes | Integrated hydraulic wet disc brakes |
| Steering | hydrostatic power |
| Final drives | inboard planetary |
Production
| Type | Articulated Crawler tractor |
|---|---|
| Series | Steiger STX Series |
| Built in | Fargo, North Dakota, USA |
| Years produced | 2002 - 2006 |
Transmission
| Type | full power shift |
|---|---|
| Gears | 16 forward and 2 reverse |
| Clutch | electro-hydraulic wet disc |
Tractor hitch
| Rear Type | IVN/III |
|---|---|
| Rear lift (at 24"/610mm) | 19500 lbs (8845 kg) |
Dimensions & Tracks
| Rear axle | 4.5 inch diameter (114 mm) |
|---|---|
| Wheelbase | 154 inches (391 cm) |
| Front axle | 4.5 inch diameter (114 mm) |
| Width (frame) | 44 inches (111 cm) |
Power Take-off (PTO)
| Rear PTO | independent (Optional) |
|---|---|
| Rear PTO Type | 1000 (1.75) |