- Articulated
- WhichTractor size: High-power
- Lab tested ×1
- 2000–2002
WhichTractor size, not the maker’s category
Derived by WhichTractor from a sourced three-point linkage. How we decide what a machine is
Case-IH STX 440 specs: hp, weight, years
CUMMINS QSX-15 six-cylinder diesel. The manufacturer claimed 434.0 horsepower. The only laboratory test on record is of one version: OECD Test 1957 measured 454.2 hp at the PTO of the STX 440 (Articulated 4 WD). Compared at the engine's rated speed, where the brochure figure is quoted, the shaft gave 400.7 hp — 7.7% below the claim.
Engine power, claimed · gross or net not stated
434.0 hp
323.6 kW as stated by the source
No lab test on file
Claimed · standard not stated by the source
Source · Traktorenlexikon, “Case-IH STX 440”, claimed
This is the maker’s own figure, measured at the engine. Power at the PTO is lower — by how much, for this machine, nobody has measured.
- Weight
- 39,500 lb
- 3-point lift
- 24,617 lb
- Hyd. flow
- 41.0 gpm
- Top speed
- 18.6 mph
Case-IH STX 440 specs: key facts
The Case-IH STX 440 was built from 2000 to 2002.
Only one version of the Case-IH STX 440 has a laboratory test on record: the STX 440 (Articulated 4 WD) produced 338.7 kW (454.2 hp) at the PTO, measured on OECD Test 1957.Source 1
The Case-IH STX 440 has a claimed engine power (gross or net not stated) of 323.6 kW (434.0 hp); it has no measured PTO figure.
The Case-IH STX 440 was built in four-wheel drive (4WD) and four-wheel drive with equal-size wheels versions, depending on configuration.Source 1
The Case-IH STX 440 has a CUMMINS QSX-15 engine, a 6-cylinder 14.95 L diesel unit.Source 3
The Case-IH STX 440 weighs 17,917 kg (39,500 lb) unladen.
The Case-IH STX 440 has a rear PTO running at 1000 rpm.
The three-point hitch of the Case-IH STX 440 lifts 11,166 kg (24,617 lb) at the lower-link ends.
The hydraulic pump of the Case-IH STX 440 delivers 155.2 L/min (41.0 gpm).
Source · Traktorenlexikon, “Case-IH STX 440”
How does the STX 440 compare with its class?
We will not rate this machine against its class. Only 13 published tractors sit within 10% of its 324 kW — too few to say what is normal.
Derived by WhichTractor. How we work this out
How much horsepower does an STX 440 have?
The only laboratory test on record is of one version. OECD Test 1957 measured 454.2 hp at the PTO of the STX 440 (Articulated 4 WD). For the STX 440 as a whole the figure is the 434.0 hp claimed for the engine, which is not power at the shaft.
Sources · Traktorenlexikon, “Case-IH STX 440”; OECD test report 1957, 2001
What engine is in an STX 440?
An STX 440 has a CUMMINS QSX-15, a 6-cylinder 14.95 L diesel engine.
| Make & model | CUMMINS QSX-15Source 3 |
|---|---|
| Cylinders | 6, liquid-cooledSource 3 |
| Displacement | 912.0 ci · 14.95 LSource 3 |
| Aspiration | superchargedSource 3 |
| Max torque | 1,583 lb·ft · 2,146 N·m @ 1,100 rpm |
| Injection | High pressure injection |
| Electrical system | 12 V |
Source · Traktorenlexikon, “Case-IH STX 440”
How much will an STX 440 lift, and what is its hydraulic flow?
An STX 440 lifts 24,617 lb (11,166 kg) at the lower-link ends of its Category 4 three-point hitch.
| System | Closed centreSource 1 |
|---|---|
| Pump flow | 41.0 gpm · 155.2 L/min |
| Pressure | 3,002 psi · 207 bar |
| Hitch category | Category 4 |
| Lift at ends | 24,617 lb · 11,166 kg |
| Rear PTO | 1000 rpm |
| PTO shaft | 1 3/4"- 20 teilig (Form-3) |
Source · Traktorenlexikon, “Case-IH STX 440”
What transmission does an STX 440 have?
Transmission specifications for the STX 440 are below.
| Clutch | Multi-disc clutch running in an oil bath |
|---|---|
| Brakes | Pedal-operated hydraulic wet disc brake acting on the rear axle |
| Steering | Hydrostatic Eaton steering series 25 |
| Top speed | 18.6 mph · 30 km/h |
Source · Traktorenlexikon, “Case-IH STX 440”
How much does an STX 440 weigh?
An STX 440 weighs 39,500 lb (17,917 kg) unladen.
| Unladen weight | 39,500 lb · 17,917 kg |
|---|---|
| Maximum permissible mass | 39,683 lb · 18,000 kg |
| Wheelbase | 154.0 in · 3,911 mm |
| Length | 297.6 in · 7,558 mm |
| Width | 153.0 in · 3,886 mm |
| Height | 143.0 in · 3,631 mm |
| Front track | 75.0–129.0 in · 1,905–3,277 mmWikibooks gives one track for both axles |
| Rear track | 75.0–129.0 in · 1,905–3,277 mmWikibooks gives one track for both axles |
Source · Traktorenlexikon, “Case-IH STX 440”
What oil does an STX 440 take, and how much?
An STX 440 engine takes 52.0 qt (49.2 L). Single source, not independently verified — always confirm against the operator’s manual for your machine.
| System | Capacity |
|---|---|
| Engine oil | 52.0 qt · 49.2 LSource: Traktorenlexikon, “Case-IH STX 440” · single source, not independently verified |
| Transmission | 80.4 qt · 76.1 LSource: Traktorenlexikon, “Case-IH STX 440” · single source, not independently verified |
| Hydraulic | 317.0 qt · 300.0 LSource: Traktorenlexikon, “Case-IH STX 440” · single source, not independently verified |
| Cooling system | 45.5 qt · 43.1 LSource: Traktorenlexikon, “Case-IH STX 440” · single source, not independently verified |
Always confirm against the operator’s manual for your machine before service.
How much fuel does an STX 440 burn per hour?
Measured on OECD Test 1957 (tested as the STX 440 (Articulated 4 WD)), at each condition the laboratory recorded.
Cost per hour = fuel used per hour × your fuel price (per litre, or per US gallon for the gal/h figure).
| Test condition | Fuel per hour |
|---|---|
| Maximum PTO powerPTO 338.7 kW (454.2 hp) at 851 rpm | 86.30 L/h 22.80 gal/h |
| Rated engine speedPTO 298.8 kW (400.7 hp) at 1,001 rpm | 83.73 L/h 22.12 gal/h |
| Standard PTO speedPTO 298.8 kW (400.7 hp) at 1,001 rpm | 83.73 L/h 22.12 gal/h |
| 75% load, 50% load | Not on record for this test |
Source · OECD Test 1957
Which tractors compare with an STX 440?
Within 10% of its 434.0 hp of claimed engine power, the same type, and first built within 15 years of it.
- New Holland TJ-440434.0 hp engine, claimed · 2001–2002Side by side with the STX 440 →
- New Holland T 9040429.0 hp engine, claimed · 2007–2010Side by side with the STX 440 →
- New Holland TJ-430424.2 hp engine, claimed · 2005–2007Side by side with the STX 440 →
- New Holland TJ-450444 hp engine, claimed · 2002–2005Side by side with the STX 440 →
- New Holland 9882419.2 hp engine, claimed · 1995–1999Side by side with the STX 440 →
- New Holland TJ-480473 hp engine, claimed · 2005–2007Side by side with the STX 440 →
Common questions about the Case-IH STX 440
Is an STX 440 two-wheel drive or four-wheel drive?
The Case-IH STX 440 was built in four-wheel drive (4WD) and four-wheel drive with equal-size wheels versions, depending on configuration.
What PTO does an STX 440 have?
An STX 440 has a 1000 rpm rear PTO on a 1 3/4"- 20 teilig (Form-3) shaft.
Sources and how this page was built
Compiled from OECD tractor test report 1957; Traktorenlexikon, “New Holland TJ375”; and Traktorenlexikon, “Case-IH STX 440”.
Sources
Facts taken from these documents, units converted. Numbers beside a figure refer to this list. Licences and attribution
- OECD Code 2 test report 2/1 957: Case IH STX 440 — Licence not stated by the publisher; facts cited, OECD-1957 · published 2001-05-31 · retrieved 2026-09-14. OECD. Original document
- Traktorenlexikon: Case-IH STX 440 — CC BY-SA 4.0, WIKIBOOKS-TL-115864 · revision 985168. Wikibooks contributors (Traktorenlexikon). Original document
- Traktorenlexikon: New Holland TJ375 — CC BY-SA 4.0, WIKIBOOKS-TL-111250 · revision 993203. Wikibooks contributors (Traktorenlexikon). Original document