CaseIH STX440QT Quadtrac
The CaseIH STX440QT Quadtrac is a powerful articulated crawler tractor built for heavy-duty farming tasks. It features a unique Quadtrac drive system, which combines the benefits of tracks and wheels for excellent traction and reduced soil compaction. The tractor is steered using a smooth hydrostatic power system and has a full power shift transmission with 16 forward gears and 2 reverse gears. Under the hood, the STX440QT boasts a Cummins QSX15 engine, which is liquid-cooled and turbocharged for better performance. This 6-cylinder diesel engine has a very high displacement of 912 ci, making it one of the largest in its class. It produces 440 hp at 2000 rpm, which is above average for tractors of this type. The tractor weighs 51,335 lb, giving it excellent stability for tough jobs. It also features a rear hitch with a category IVN rating, suitable for heavy implements. The STX440QT is equipped with a closed center load sensing hydraulic system, which helps improve fuel efficiency and responsiveness. It has a 12-volt electrical system and an electric starter for reliable operation. With its 44-inch frame width, this tractor is designed to handle large-scale farming operations with ease. CaseIH, known for its high-quality agricultural equipment, has created a machine that combines power, efficiency, and advanced features in the STX440QT Quadtrac.
Quick specs
- Category
- Crawler
- Engine Power Output
- 440hp
- Operating Weight
- 51,335 lb
- Transmission
- full power shift
At a glance
How the STX440QT Quadtrac compares
vs. Crawler medianDistribution
Engine Power (hp)
Across all Crawler tractors
This model
The STX440QT Quadtrac ranks at the 80th percentile for engine power among recorded crawler tractors.
Overview
About the CaseIH STX440QT Quadtrac
The CaseIH STX440QT Quadtrac is a powerful articulated crawler tractor built for heavy-duty farming tasks. It features a unique Quadtrac drive system, which combines the benefits of tracks and wheels for excellent traction and reduced soil compaction. The tractor is steered using a smooth hydrostatic power system and has a full power shift transmission with 16 forward gears and 2 reverse gears. Under the hood, the STX440QT boasts a Cummins QSX15 engine, which is liquid-cooled and turbocharged for better performance. This 6-cylinder diesel engine has a very high displacement of 912 ci, making it one of the largest in its class. It produces 440 hp at 2000 rpm, which is above average for tractors of this type. The tractor weighs 51,335 lb, giving it excellent stability for tough jobs. It also features a rear hitch with a category IVN rating, suitable for heavy implements. The STX440QT is equipped with a closed center load sensing hydraulic system, which helps improve fuel efficiency and responsiveness. It has a 12-volt electrical system and an electric starter for reliable operation. With its 44-inch frame width, this tractor is designed to handle large-scale farming operations with ease. CaseIH, known for its high-quality agricultural equipment, has created a machine that combines power, efficiency, and advanced features in the STX440QT Quadtrac.
Full specifications
Every recorded spec
General
| Manufacturer | CaseIH |
|---|---|
| Model | STX440QT Quadtrac |
| Category | Crawler tractor |
| Type | articulated crawler |
| Operating weight | 51,335lb |
Engine
| Make | Cummins |
|---|---|
| Model | QSX15 |
| Power | 440hp |
| Cylinders | 6 |
| Displacement | 912ci |
| Bore | 5.39in |
| Stroke | 6.65in |
Transmission
| Type | full power shift |
|---|---|
| Forward gears | 16 |
| Reverse gears | 2 |
Chassis & drive
| Chassis | articulated crawler |
|---|---|
| Drive | Quadtrac |
| Steering | hydrostatic power |
Hydraulics
| Type | closed center load sensing |
|---|
Dimensions
| Width | 44in |
|---|---|
| Operating weight | 51,335lb |
Head to head
STX440QT Quadtrac vs. Crawler median
How the CaseIH STX440QT Quadtrac compares to other Crawler tractors
| Spec | This model | Crawler median | Difference | Percentile |
|---|---|---|---|---|
| Engine Power | 440 hp | 200 hp | +120% | 80th |
| Engine Displacement | 912 ci | 468 ci | +95% | 91st |
| Cylinders | 6 | 6 | at median | 50th |
| Forward Gears | 16 | 10 | +60% | 69th |
| Operating Weight | 51,335 lb | 23,320 lb | +120% | 93rd |
| Width | 44 in | 79.5 in | -45% | 7th |
Medians and percentiles are computed from the crawler tractors in our database with a recorded value for each spec (sample sizes 142–192 models).
Compare to tractors with similar specs
Commonly compared CaseIH tractors
| Tractor | Engine Power | Operating Weight | Years | Compare |
|---|---|---|---|---|
| CaseIH Steiger 435QT Quadtrac | 435 hp | 48,150 lb | — | Compare → |
| CaseIH Steiger 450 Quadtrac | 450 hp | 53,554 lb | — | Compare → |
| CaseIH STX430QT Quadtrac | 430 hp | 54,000 lb | — | Compare → |
| CaseIH STX450QT Quadtrac | 450 hp | 51,335 lb | — | Compare → |
| CaseIH STX425QT Quadtrac | 425 hp | 53,264 lb | — | Compare → |
Commonly compared tractors with similar horsepower from other brands
| Tractor | Engine Power | Operating Weight | Years | Compare |
|---|---|---|---|---|
| Big Bud 440 | 440 hp | 40,000 lb | — | Compare → |
| Challenger 1046 | 446 hp | 30,865 lb | — | Compare → |
| Big Bud 450 | 450 hp | 40,000 lb | — | Compare → |
| Big Bud 450/20 | 450 hp | 41,500 lb | — | Compare → |
| Big Bud 450/50 | 450 hp | 41,500 lb | — | Compare → |
Explore
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FAQ
Common questions
How much horsepower does the CaseIH STX440QT Quadtrac have?
The CaseIH STX440QT Quadtrac produces 440 hp from its 6-cylinder engine. Engine displacement is 912 ci.
What hydraulics does the CaseIH STX440QT Quadtrac have?
The CaseIH STX440QT Quadtrac uses a closed center load sensing hydraulic system.
What three-point hitch category does the CaseIH STX440QT Quadtrac use?
The CaseIH STX440QT Quadtrac has a Category IVN three-point hitch.
How much does the CaseIH STX440QT Quadtrac weigh?
The CaseIH STX440QT Quadtrac weighs about 51,335 lb in operating condition.
What transmission is in the CaseIH STX440QT Quadtrac?
Transmission on the CaseIH STX440QT Quadtrac is full power shift, with 16 forward speeds.
What maintenance does the CaseIH STX440QT Quadtrac require?
Like any tractor, the CaseIH STX440QT Quadtrac needs periodic engine oil and filter changes, hydraulic fluid checks, and regular greasing and inspection. The owner's manual lists the manufacturer's recommended service intervals.





