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CaseIH STX425QT Quadtrac

CaseIH STX425QT Quadtrac tractor
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The CaseIH STX425QT Quadtrac is an articulated crawler tractor produced from 2002 to 2006 as part of the Steiger STX Series. It features a powerful Cummins QSX15 15.0L 6-cylinder turbocharged aftercooled diesel engine delivering 425 hp (316.9 kW) with a 16-speed full power shift transmission. The tractor is equipped with articulated crawler drive, inboard planetary final drives, hydrostatic power steering, and integrated hydraulic wet disc brakes. It has a 300-gallon fuel tank and offers a pressure flow compensated hydraulic system with 4 to 7 rear valves. The rear hitch is IVN/III type with a lift capacity of 19,500 lbs at 24 inches. The rear PTO is independent and optional, rated at 1000 RPM. Dimensions include a 154-inch wheelbase and track widths of 30 or 36 inches. The tractor weighs up to 53,264 lbs and was built in Fargo, North Dakota, USA.
CaseIHSTX425QTQuadtracarticulated crawler tractorCummins QSX15425 hpfull power shift transmissiontractor specifications
Power-
Founded-
ModelSTX425QT

Technical Specifications

Detailed specifications and technical data for CaseIH STX425QT Quadtrac

Power

Engine:425 hp (316.9 kW)
PTO (claimed):370 hp (275.9 kW)

Engine

Type:turbocharged aftercooled diesel
Model:Cummins QSX15
Power:425 hp (316.9 kW)
Torque:1594 lb-ft (2161.5 Nm)
Cooling:liquid-cooled
Cylinders:6-cylinder
Fuel tank:300 gal (1135.5 L)
Rated RPM:2000
Torque RPM:1400
Air cleaner:dual paper elements
Bore/Stroke:5.39x6.65 inches (137 x 169 mm)
Displacement:915 ci (15.0 L)
Starter volts:12

Tracks

Width:30 inches (76 cm), 36 inches (91 cm)

Weight

Max Drawbar:5300 lbs (2404 kg)
Max capacity:53264 lbs (24160 kg)
Optional Drawbar:11000 lbs (4989 kg)

Variants

STX425:wheeled tractor
STX425QT:crawler tractor

Electrical

Ground:negative
Battery volts:12
Charging system:alternator

Hydraulics

Type:pressure flow compensated (PFC)
Pump flow:40 gpm (151.4 lpm)
Rear valves:4 to 7
Optional pump flow:55 gpm (208.2 lpm)

Mechanical

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

Production

Type:Articulated Crawler tractor
Series:Steiger STX Series
Built in:Fargo, North Dakota, USA
Years produced:2002 - 2006

Transmission

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

Tractor hitch

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

Dimensions & Tracks

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

Power Take-off (PTO)

Rear PTO:independent (Optional)
Rear PTO Type:1000 (1.75)

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