CaseIH STX425QT Quadtrac

The CaseIH STX425QT Quadtrac is a tractor produced by Caseih. It is equipped with a 915 ci 15.0 L engine. The listed engine power is Diesel (listed): 425 hp / 316.9 kW. Transmission: 16 forward and 2 reverse. Drive type: articulated crawler.

Engine Power

Diesel (listed): 425 hp / 316.9 kW

Drive & Traction

articulated crawler

Fuel & Capacities

300 gal 1135.5 L

Transmission

16 forward and 2 reverse

Overview

	2002 - 2006 Steiger STX SeriesArticulated Crawler tractor Steiger STX Series Articulated Crawler tractor

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

Variants
STX425	wheeled tractor
STX425QT	crawler tractor

CaseIH STX425QT Engine
Cummins 15.0L 6-cyl diesel
Fuel tank	300 gal 1135.5 L
Engine details ...

CaseIH STX425QT Transmission
16-speed full power shift
Transmission details ...

CaseIH STX425QT Power
Engine	425 hp 316.9 kW
PTO (claimed)	370 hp 275.9 kW

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)
Rear valves	4 to 7
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)

Dimensions & Tracks
Wheelbase	154 inches 391 cm
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*
STX Series Steiger Tractors published in 2002, by CaseIH*
*Publication contains known errors.

Engine

Engine Detail — 915 ci / 15.0 L Diesel

Manufacturer	Cummins QSX15
Configuration	turbocharged aftercooled diesel, 6-cylinder, liquid-cooled
Displacement	915 ci 15.0 L
Bore/Stroke	5.39x6.65 inches 137 x 169 mm
Power	425 hp 316.9 kW
Air cleaner	dual paper elements
Rated RPM	2000
Torque	1594 lb-ft 2161.5 Nm
Torque RPM	1400
Starter volts	12

CaseIH STX425QT 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 STX425QT 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 STX425QT Weight
Max capacity	53264 lbs 24160 kg
Max Drawbar	5300 lbs 2404 kg
	11000 lbs (optional) 4989 kg

Photos

CaseIH STX425QT Quadtrac tractor photo

Recommended Implements & Sizing Guide

Engineering recommendations for Caseih STX425QT Quadtrac based on its 425 HP power envelope and ASAE agricultural standards.

Implement & Operation	Recommended Size	Workload Rating	Engineering Notes
Moldboard PlowPrimary Tillage	8+ Bottom On-Land Hitch8+ 铧重型机外牵引犁	Commercial / Field Scale	High horsepower articulated/4WD field plowing.
Rotary Cutter / MowerMowing & Clearing	15 to 20 ft Batwing4.6 - 6.1 m 宽幅折叠翼	Commercial / Field Scale	Large commercial field and roadside mowing operations.
Rotary TillerSeedbed Prep	90 to 120 in Heavy Duty230 - 300 cm 重型旋耕机	Commercial / Field Scale	Deep intensive seedbed preparation for commercial row crops.
Disc HarrowSecondary Tillage	24 to 36 ft Heavy Duty Field Disc7.3 - 11.0 m 超宽重型整地耙	Commercial / Field Scale	Broad-acre grain tillage for high-drawbar tractors.
Hay BalerHay & Forage	Large Square Baler (3x4 or 4x4)大方捆商用打捆机 (1.2x1.2 m)	Commercial / Field Scale	High-capacity commercial forage harvesting (1000 RPM PTO).

Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.

Fluids, Capacities & Working Autonomy

Standard fluid requirements, service intervals, and continuous runtime estimates for Caseih STX425QT Quadtrac.

Estimated Continuous Field Runtime: 13.6 hrs

Approximately 13.6 hours of continuous field operation at ~75% rated power on a full tank (300 gal / 1135.6 L).

Estimated 75% Load Fuel Burn~22.1 gal/hr (83.7 L/hr)

Engine Crankcase Oil

SAE 15W-40 (Heavy Duty Diesel)

Standard Spec: API CK-4 / CJ-4 Heavy Duty

Service Interval: 150 – 250 Hours

Transmission & Hydraulic System

UTTO (Universal Tractor Transmission Oil)

Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)

Service Interval: 600 – 1000 Hours

Engine Cooling System

50/50 Ethylene Glycol Pre-mix

Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze

Service Interval: 2 Years / 1500 Hours