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  • Articulated
  • WhichTractor size: High-power
  • Lab tested ×1
  • 2000–2002

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Derived by WhichTractor from a sourced three-point linkage. How we decide what a machine is

Case-IH STX 440 Full specifications

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).

Engine power, claimed · gross or net not stated

434.0 hp

323.6 kW as stated by the source

Not independently tested

Claimed · standard not stated by the source

Source · Traktorenlexikon, “Case-IH STX 440”, claimed

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 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.

Engine, claimed (gross/net not stated)
434.0 hp

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.

Engine — STX 440 engine specifications
Make & modelCUMMINS QSX-15Source 3
Cylinders6, liquid-cooledSource 3
Displacement912.0 ci · 14.95 LSource 3
AspirationsuperchargedSource 3
Max torque1,583 lb·ft · 2,146 N·m @ 1,100 rpm
InjectionHigh pressure injection
Electrical system12 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.

Hydraulics & PTO — STX 440 hydraulics and PTO specifications
SystemClosed centreSource 1
Pump flow41.0 gpm · 155.2 L/min
Pressure3,002 psi · 207 bar
Hitch categoryCategory 4
Lift at ends24,617 lb · 11,166 kg
Rear PTO1000 rpm
PTO shaft1 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.

Transmission — STX 440 transmission specifications
ClutchMulti-disc clutch running in an oil bath
BrakesPedal-operated hydraulic wet disc brake acting on the rear axle
SteeringHydrostatic Eaton steering series 25
Top speed18.6 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.

Weights & dimensions — STX 440 weights and dimensions
Unladen weight39,500 lb · 17,917 kg
Maximum permissible mass39,683 lb · 18,000 kg
Wheelbase154.0 in · 3,911 mm
Length297.6 in · 7,558 mm
Width153.0 in · 3,886 mm
Height143.0 in · 3,631 mm
Front track75.0–129.0 in · 1,905–3,277 mmWikibooks gives one track for both axles
Rear track75.0–129.0 in · 1,905–3,277 mmWikibooks gives one track for both axles

Source · Traktorenlexikon, “Case-IH STX 440”

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).

Fuel use measured on OECD Test 1957
Test conditionFuel per hour
Maximum PTO powerPTO 338.7 kW (454.2 hp) at 851 rpm86.30 L/h 22.80 gal/h
Rated engine speedPTO 298.8 kW (400.7 hp) at 1,001 rpm83.73 L/h 22.12 gal/h
Standard PTO speedPTO 298.8 kW (400.7 hp) at 1,001 rpm83.73 L/h 22.12 gal/h
75% load, 50% loadNot on record for this test

Source · OECD Test 1957

Which tractors compare with an STX 440?

Within 10% of its 400.7 hp at the PTO (claimed), the same type, and first built within 15 years of it.

Everything else people ask

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.

Where this page comes from

Compiled from OECD tractor test report 1957; Traktorenlexikon, “New Holland TJ375”; and Traktorenlexikon, “Case-IH STX 440”.

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Sources

Facts taken from these documents, units converted. Numbers beside a figure refer to this list. Licences and attribution

  1. 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
  2. Traktorenlexikon: Case-IH STX 440 — CC BY-SA 4.0, WIKIBOOKS-TL-115864 · revision 985168. Wikibooks contributors (Traktorenlexikon). Original document
  3. Traktorenlexikon: New Holland TJ375 — CC BY-SA 4.0, WIKIBOOKS-TL-111250 · revision 993203. Wikibooks contributors (Traktorenlexikon). Original document