CaseIH STX450QT Quadtrac

The CaseIH STX450QT Quadtrac is a tractor produced by Caseih. It is equipped with a 912 ci 14.9 L engine. The rated power output is 450 hp 335.6 kW. Transmission: 16 forward and 2 reverse. Drive type: articulated crawler. Operating weight: 51335 lbs 23285 kg.

Overview

	2002 - 2005 Steiger STX SeriesArticulated Crawler tractor
2002 - 2005
Steiger STX Series
Articulated Crawler tractor

Production
Manufacturer	CaseIH
Articulated Crawler tractor
Built in Fargo, North Dakota, USA

Variants
STX450	wheeled tractor
STX450QT	crawler tractor

CaseIH STX450QT Engine
Cummins 14.9L 6-cyl diesel
Fuel tank	300 gal 1135.5 L
Engine details ...

CaseIH STX450QT Transmission
16-speed full power shift
Transmission details ...

CaseIH STX450QT Power
Engine	450 hp 335.6 kW
PTO (claimed)	395 hp 294.6 kW
Drawbar (tested)	345.68 hp 257.8 kW
PTO (tested)	450.29 hp 335.8 kW
Performance test details ...

Mechanical
Drive	articulated crawler
Final drives	inboard planetary
Steering	hydrostatic power
Integrated hydraulic wet disc brakes
Surveyor Cab standard.

Hydraulics
Type	pressure flow compensated (PFC)
Pump flow	40 gpm 151.4 lpm
	55 gpmOptOptional 208.2 lpm

Tractor hitch
Rear Type	IVN/III
Rear lift (at 24"/610mm)	19500 lbs 8845 kg

Power Take-off (PTO)
Rear PTO	independent OptOptional
Rear PTO Type	1000 (1.75)
Engine RPM	1000@1998

Dimensions & Tracks
Wheelbase	154 inches 391 cm
Weight	51335 lbs 23285 kg
30-inch tracks
Full dimensions and tracks ...

Electrical
Ground	negative
Charging system	alternator
Battery volts	12

References
STX Series Steiger Tractors published in 2002, by CaseIH*
*Publication contains known errors.

Engine

Engine Detail — 912 ci / 14.9 L Diesel

Manufacturer	Cummins QSX15
Configuration	turbocharged aftercooled diesel, 6-cylinder, liquid-cooled
Displacement	912 ci 14.9 L
Bore/Stroke	5.39x6.65 inches 137 x 169 mm
Power	450 hp 335.6 kW
Air cleaner	dual paper elements
Compression	16.5:1
Rated RPM	2000
Torque	1669 lb-ft 2263.2 Nm
Torque RPM	1400
Starter volts	12

CaseIH STX450QT Engine

Transmission

Transmission — 16 forward and 2 reverse full power shift

Type	full power shift
Gears	16 forward and 2 reverse
Clutch	electro-hydraulic wet disc

Dimensions

CaseIH STX450QT Tracks
Width	30 inches 76 cm
Width	36 inches 91 cm

Dimensions
Wheelbase	154 inches 391 cm
Width	44 inches (frame) 111 cm
Front axle	4.5 inch diameter 114 mm
Rear axle	4.5 inch diameter 114 mm

CaseIH STX450QT Weight
Operating	51335 lbs 23285 kg
Max capacity	53264 lbs 24160 kg
Max Drawbar	5300 lbs 2404 kg
	11000 lbs (optional) 4989 kg

Tests

OCED Tractor Test 1785
Diesel 16-speed Crawler October 4 - 19, 2000 Link: OCED Tractor Test 1785 file
PTO performance
Max power	450.29 hp 335.8 kW
Fuel use	22.3 gal/hour 84.4 l/hour
Power at rated engine speed	399.14 hp 297.6 kW
Fuel use	22.0 gal/hour 83.3 l/hour
Drawbar performance
Max power	345.68 hp 257.8 kW
Fuel use	22.1 gal/hour 83.6 l/hour
Gear 4 used for power test.
Max pull	38412 lbs 17423 kg
Gear 3 used for pull test.

Photos

CaseIH STX450QT Quadtrac tractor photo