CaseIH
CaseIH STX440QT Quadtrac
The CaseIH STX440QT Quadtrac is an articulated crawler tractor introduced in 2001, built in Fargo, North Dakota, USA. It features a powerful Cummins QSX15 14.9L 6-cylinder turbocharged aftercooled diesel engine producing 440 hp. The tractor has a 16-speed full power shift transmission with electro-hydraulic wet disc clutch. It offers advanced mechanical features including articulated crawler drive, inboard planetary final drives, hydrostatic power steering, and integrated hydraulic wet disc brakes. The hydraulics system is closed center load sensing with 4 to 7 rear valves and pump flow options of 40 or 55 gpm. The tractor hitch is IVN type with a rear lift capacity of 19500 lbs at 24 inches. The rear PTO is optional independent type with 1000 rpm. Dimensions include a 44 inch frame width and operating weight of 51335 lbs. Electrical system uses negative ground with 2 batteries at 12 volts. The STX440QT is part of the Steiger STX Series and related to the STX450QT model.
Power-
Founded-
ModelSTX440QT
Technical Specifications
Detailed specifications and technical data for CaseIH STX440QT Quadtrac
Power
| Engine | 440 hp (328.1 kW) |
|---|---|
| PTO (tested) | 450.29 hp (335.8 kW) |
| Drawbar (tested) | 345.68 hp (257.8 kW) |
Engine
| Type | turbocharged aftercooled diesel |
|---|---|
| Model | Cummins QSX15 |
| Power | 440 hp (328.1 kW) |
| Torque | 1650 lb-ft (2237.4 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 | 5.394x6.654 inches (137 x 169 mm) |
| Compression | 16.5:1 |
| Displacement | 912 ci (14.9 L) |
| Starter volts | 12 |
Dimensions
| Width | 44 inches (frame) (111 cm) |
|---|---|
| Rear axle | 4.5 inch diameter (114 mm) |
| Max weight | 53264 lbs (24160 kg) |
| Operating weight | 51335 lbs (23285 kg) |
Electrical
| Ground | negative |
|---|---|
| Batteries | 2 |
| Battery volts | 12 |
| Charging system | alternator |
Hydraulics
| Type | closed center load sensing |
|---|---|
| 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 |
|---|---|
| Built in | Fargo, North Dakota, USA |
| Manufacturer | CaseIH |
| Year introduced | 2001 |
Transmission
| Type | full power shift |
|---|---|
| Gears | 16 forward and 2 reverse |
| Clutch | electro-hydraulic wet disc |
Tractor hitch
| Rear Type | IVN |
|---|---|
| Rear lift (at 24"/610mm) | 19500 lbs (8845 kg) |
Power Take-off (PTO)
| Rear PTO | independent (Optional) |
|---|---|
| Rear PTO Type | 1000 |