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Tractor · 2002Unverified

CaseIH STX450QT Quadtrac

Name: CaseIH STX450QT Quadtrac
Brand: CaseIH

CaseIH STX450QT Quadtrac — Steiger STX Series · 399 hp. Reference specifications; pending source verification.

The CaseIH STX450QT Quadtrac is a 399 hp tractor, placing it at the high-power end of its class. It was manufactured between 2002 and 2005. A 6-cylinder turbocharged diesel liquid-cooled engine powers the tractor, paired with a tracked undercarriage featuring a hydrostatic transmission. Its listed operating weight is 23285 kg, and it is suited to operations covering over 1,500 acres.

Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.

Rated power

399 hp

Max power

335.8 kW

Weight

23285 kg

Catalogue coverage

Variants represented

Richest spec table

68 rows

Recorded power

399 hp

Recorded weight

23285 kg

Transmissions

16-speed full power shift

Production years

2002-2005

Verified variants

No linked source document is currently displayed; verify critical figures with the manufacturer or dealer.

Hover a source tag to verify

Overview

ManufacturerCaseIHReference

Articulated Crawler tractorReference

Built in Fargo, North Dakota, USAReference

Drivearticulated crawlerReference

Final drivesinboard planetaryReference

Steeringhydrostatic powerReference

Integrated hydraulic wet disc brakesReference

Surveyor Cab standard.Reference

Variants

STX450wheeled tractorReference

STX450QTcrawler tractorReference

Engine

Cummins 14.9L 6-cyl dieselReference

Fuel tank1135.5 LReference

Engine335.6 kWReference

Drawbar (tested)257.8 kWReference

Cummins QSX15Reference

turbocharged aftercooled dieselReference

6-cylinderReference

liquid-cooledReference

Displacement14.9 LReference

Bore/Stroke137 x 169 mmReference

Power335.6 kWReference

Air cleanerdual paper elementsReference

Compression16.5:1Reference

Rated RPM2000Reference

Torque2263.2 NmReference

Torque RPM1400Reference

Starter volts12Reference

Max power335.8 kWReference

Power at rated engine speed297.6 kWReference

Max power257.8 kWReference

Transmission

16-speed full power shiftReference

Typefull power shiftReference

Gears16 forward and 2 reverseReference

Clutchelectro-hydraulic wet discReference

PTO & Hydraulics

PTO (claimed)294.6 kWReference

PTO (tested)335.8 kWReference

Typepressure flow compensated (PFC)Reference

Pump flow151.4 lpmReference

Pump flow208.2 lpmReference

Rear TypeIVN/IIIReference

Rear lift (at 24"/610mm)8845 kgReference

Rear PTOindependentReference

Rear PTO Type1000 (1.75)Reference

Engine RPM1000@1998Reference

Dimensions

Wheelbase391 cmReference

Weight23285 kgReference

30-inch tracksReference

Width111 cmReference

Front axle114 mmReference

Rear axle114 mmReference

Operating23285 kgReference

Max Drawbar2404 kgReference

Max Drawbar4989 kgReference

Electrical

GroundnegativeReference

Charging systemalternatorReference

Battery volts12Reference

CaseIH STX450QT Tracks

Width76 cmReference

Width91 cmReference

Capacities

Max capacity24160 kgReference

Test results

Diesel 16-speed CrawlerOctober 4 - 19, 2000Link: OCED Tractor Test 1785 fileReference

PTO performanceReference

Fuel use84.4 l/hourReference

Fuel use83.3 l/hourReference

Drawbar performanceReference

Fuel use83.6 l/hourReference

Gear 4 used for power test.Reference

Max pull17423 kgReference

Gear 3 used for pull test.Reference

Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.

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