Overview
The CaseIH STX440QT Quadtrac is an articulated crawler tractor manufactured in Fargo, North Dakota, featuring a Cummins 14.9L 6-cylinder diesel engine. It is equipped with a 16-speed full power shift transmission and a closed center load sensing hydraulic system with a 40 gpm pump flow. Performance testing recorded a maximum PTO power of 450.29 hp and a rear lift capacity of 19,500 lbs.
Ideal Applications
Engine Output and Testing:
The Cummins QSX15 engine is rated at 440 hp with 1,650 lb-ft of torque and achieved a tested drawbar power of 345.68 hp in OCED Tractor Test 1785.
Drivetrain and Steering:
The mechanical configuration consists of an articulated crawler drive with inboard planetary final drives and a hydrostatic power steering system.
Operational Weight and Dimensions:
This tractor has an operating weight of 51,335 lbs, a maximum weight of 53,264 lbs, and is built on a 44-inch wide frame.
Production
| Description | Articulated Crawler tractor / Built in Fargo, North Dakota, USA |
|---|---|
| Manufacturer | CaseIH |
Engine
| Engine type | Cummins 14.9L 6-cyl diesel |
|---|---|
| Fuel tank | 300 gal (1135.5 L) |
| Air cleaner | dual paper elements |
| Bore/Stroke | 5.394x6.654 inches (137 x 169 mm) |
| Compression | 16.5:1 |
| Description | Cummins QSX15 / turbocharged aftercooled diesel / 6-cylinder / liquid-cooled |
| Displacement | 912 ci (14.9 L) |
| Power | 440 hp (328.1 kW) |
| Rated RPM | 2000 |
| Starter volts | 12 |
| Torque | 1650 lb-ft (2237.4 Nm) |
| Torque RPM | 1400 |
| Drawbar (tested) | 345.68 hp (257.8 kW) |
| PTO (tested) | 450.29 hp (335.8 kW) |
Transmission
| Clutch | electro-hydraulic wet disc |
|---|---|
| Gears | 16 forward and 2 reverse |
| Transmission type | 16-speed full power shift |
| Type | full power shift |
Mechanical
| Cab | Surveyor Cab standard. |
|---|---|
| Description | Integrated hydraulic wet disc brakes |
| Drive | articulated crawler |
| Final drives | inboard planetary |
| Steering | hydrostatic power |
Hydraulics
| Pump flow | 40 gpm (151.4 lpm) |
|---|---|
| Rear valves | 4 to 7 |
| Type | closed center load sensing |
Hitch
| Rear lift (at 24"/610mm) | 19500 lbs (8845 kg) |
|---|---|
| Rear Type | IVN |
PTO
| Rear PTO | independent OptOptional |
|---|---|
| Rear PTO Type | 1000 |
Electrical
| Batteries | 2 |
|---|---|
| Battery volts | 12 |
| Charging system | alternator |
| Ground | negative |
Dimensions & Tires
| Max weight | 53264 lbs (24160 kg) |
|---|---|
| Operating weight | 51335 lbs (23285 kg) |
| Rear axle | 4.5 inch diameter (114 mm) |
| Width | 44 inches (frame) (111 cm) |
Dimensions & Tracks
| Description | Tracks |
|---|---|
| Weight | 51335 lbs (23285 kg) |
OCED Tractor Test 1785
| Description | Diesel 16-speed CrawlerOctober 4 - 19, 2000Link: OCED Tractor Test 1785 file / PTO performance / Drawbar performance / Gear 4 used for power test. |
|---|---|
| Fuel use | 22.3 gal/hour (84.4 l/hour) / 22.0 gal/hour (83.3 l/hour) / 22.1 gal/hour (83.6 l/hour) |
| Max power | 450.29 hp (335.8 kW) / 345.68 hp (257.8 kW) |
| Power at rated engine speed | 399.14 hp (297.6 kW) |
References
| Description | STX Series Steiger Tractors published in 2000, by CaseIH* / *Publication contains known errors. |
|---|