CaseIH
CaseIH STX450QT Quadtrac
The CaseIH STX450QT Quadtrac is an articulated crawler tractor produced from 2002 to 2005 as part of the Steiger STX Series. It features a powerful Cummins QSX15 14.9L 6-cylinder turbocharged aftercooled diesel engine delivering 450 hp. The tractor uses a 16-speed full power shift transmission with electro-hydraulic wet disc clutch and articulated crawler drive with inboard planetary final drives. It includes hydrostatic power steering, integrated hydraulic wet disc brakes, and a Surveyor Cab as standard. The STX450QT offers advanced hydraulics with pressure flow compensated pumps and optional higher flow. It has a rear IVN/III hitch with a 19500 lbs lift capacity and an optional independent rear PTO. The tractor is built in Fargo, North Dakota, USA, and is designed for heavy-duty farming applications requiring high power and traction.
Power-
Founded-
ModelSTX450QT
Technical Specifications
Detailed specifications and technical data for CaseIH STX450QT Quadtrac
Power
| Engine | 450 hp (335.6 kW) |
|---|---|
| PTO (tested) | 450.29 hp (335.8 kW) |
| PTO (claimed) | 395 hp (294.6 kW) |
| Drawbar (tested) | 345.68 hp (257.8 kW) |
Engine
| Type | turbocharged aftercooled diesel |
|---|---|
| Model | Cummins QSX15 |
| Power | 450 hp (335.6 kW) |
| Torque | 1669 lb-ft (2263.2 Nm) |
| Cooling | liquid-cooled |
| Cylinders | 6-cylinder |
| Rated RPM | 2000 |
| Torque RPM | 1400 |
| Air cleaner | dual paper elements |
| Bore/Stroke | 5.39x6.65 inches (137 x 169 mm) |
| Compression | 16.5:1 |
| Displacement | 912 ci (14.9 L) |
| Starter volts | 12 |
Tracks
| Width | 30 inches (76 cm), 36 inches (91 cm) |
|---|
Weight
| Optional | 11000 lbs (4989 kg) |
|---|---|
| Operating | 51335 lbs (23285 kg) |
| Max Drawbar | 5300 lbs (2404 kg) |
| Max capacity | 53264 lbs (24160 kg) |
Variants
| STX450 | wheeled tractor |
|---|---|
| STX450QT | crawler tractor |
Dimensions
| Width | 44 inches (frame) (111 cm) |
|---|---|
| Rear axle | 4.5 inch diameter (114 mm) |
| Wheelbase | 154 inches (391 cm) |
| Front axle | 4.5 inch diameter (114 mm) |
Electrical
| Ground | negative |
|---|---|
| Battery volts | 12 |
| Charging system | alternator |
Hydraulics
| Type | pressure flow compensated (PFC) |
|---|---|
| Pump flow | 40 gpm (151.4 lpm) |
| 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 made | 2002 - 2005 |
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) |
Power Take-off (PTO)
| Rear PTO | independent (Optional) |
|---|---|
| Engine RPM | 1000@1998 |
| Rear PTO Type | 1000 (1.75) |
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