| Manufacturer | CaseIH |
| Price | - |
| Model | STX440QT |
| Equipment Type | Articulated Crawler Tractors |
| Factory | Fargo, North Dakota, USA |
OCED TRACTOR TEST 1785
| Description | Diesel 16-speed Crawler October 4 - 19, 2000 Link: OCED Tractor Test 1785 file PTO performance Drawbar performance Gear 4 used for power test |
| Max power | 345.68hp / 257.8kW |
| Fuel use | 22.1gal/hour / 83.6l/hour |
| Power at rated engine speed | 399.14hp / 297.6kW |
CASEIH STX440QT POWER
| Engine | 440hp / 328.1kW |
| Drawbar (tested) | 345.68hp / 257.8kW |
| PTO (tested) | 450.29hp / 335.8kW |
ENGINE DETAIL
The CaseIH STX440QT tractor features a powerful Cummins QSX15 engine with a significant displacement of 14.9L, producing 440hp and a peak torque of 1650 lb-ft at 1400 RPM, ideal for heavy-duty applications. Its dual paper element air cleaner enhances engine efficiency by providing superior filtration, though regular maintenance is essential to avoid performance degradation. With a high compression ratio of 16.5:1, this tractor offers improved fuel efficiency and power output; however, it may require higher-quality diesel fuel for optimal performance.
| Description | Cummins QSX15 turbocharged aftercooled diesel 6-cylinder liquid-cooled |
| Displacement | 912ci / 14.9L |
| Bore/Stroke | 5.394x6.654inches / 137x 169 mm |
| Power | 440hp / 328.1kW |
| Air cleaner | dual paper elements |
| Compression | 16.5:1 |
| Rated RPM | 2000 |
| Torque | 1650 lb-ft /2237.4 Nm |
| Torque RPM | 1400 |
| Starter volts | 12 |
CASEIH STX440QT ENGINE
The CaseIH STX440QT features a Cummins 14.9L 6-cylinder diesel engine, providing robust power and torque for demanding agricultural tasks. Its substantial 300-gallon fuel tank allows for extended operation without frequent refueling, making it advantageous for large-scale farming operations. However, the size and weight of the tractor may pose challenges in tighter fields or when maneuverability is required.
| Description | Cummins 14.9L 6-cyl diesel |
| Fuel tank | 300gal / 1135.5L |
TRANSMISSION
The CaseIH STX440QT features a full power shift transmission, providing seamless gear transitions with 16 forward and 2 reverse gears, enhancing operational efficiency and reducing gear-changing downtime. The electro-hydraulic wet disc clutch offers improved durability and heat management during heavy-duty applications, ensuring consistent performance under load. However, the complexity of the power shift system may require specialized maintenance knowledge, which could be a consideration for remote operation or in the event of service needs.
| Type | full power shift |
| Gears | 16 forward and 2 reverse |
| Clutch | electro-hydraulic wet disc |
MECHANICAL
The CaseIH STX440QT, featuring an articulated crawler chassis and inboard planetary final drives, provides superior traction and stability on varied terrain, making it ideal for heavy-duty tasks such as tillage and hauling. Its hydrostatic power steering offers enhanced maneuverability, while the integrated hydraulic wet disc brakes ensure reliable stopping power under load, crucial for safety in challenging environments. The 16-speed full power shift transmission enables seamless gear changes, optimizing performance across diverse operational scenarios, though the complexity may require skilled operators for effective use.
| Chassis | articulated crawler |
| Final drives | inboard planetary |
| Steering | hydrostatic power |
| Brakes | integrated hydraulic wet disc |
| Cab | Surveyor Cab standard. |
| Transmission | 16-speed full power shift |
HYDRAULICS
| Type | closed center load sensing |
| Rear valves | 4 to 7 |
| Pump flow | 40gpm / 151.4lpm/55gpm / 208.2lpm |
TRACTOR HITCH
| Rear Type | IVN |
| Rear lift (at 24 | 19500lbs / 8845kg |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Rear RPM | 1000 |
DIMENSIONS
| Width | 44inches / 111cm (frame) |
| Operating weight | 51335lbs / 23285kg |
| Max weight | 53264lbs / 24160kg |
| Rear axle | 4.5 inch diameter /114 mm |
DIMENSIONS & TRACKS
| Weight | 51335lbs / 23285kg |
| Description | tracks |
ELECTRICAL
| Ground | negative |
| Charging system | alternator |
| Batteries | 2 |
| Battery volts | 12 |