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Tractor · 2002Unverified

John Deere 8420T

Name: John Deere 8420T
Brand: John Deere

John Deere 8420T — Agricultural Crawler tractor · 284 hp. Reference specifications; pending source verification.

The John Deere 8420T is a tractor with a rated output of 284 horsepower, positioning it within the higher-powered category of its class. It was manufactured from 2002 to 2005. Equipped with a 6-cylinder turbocharged diesel liquid-cooled engine, it is designed with a powershift transmission driving a tracked undercarriage. The listed weight ranges from 25950 to 26380 pounds, and it is intended for use on areas of approximately 1,500 acres and above.

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

Rated power

284 hp

Max power

201.8 kW

Weight

25950 to 26380 pounds

Catalogue coverage

Variants represented

Richest spec table

95 rows

Recorded power

284 hp

Transmissions

16-speed full power shift

Production years

2002-2005

Verified variants

1 linked source document displayed

Hover a source tag to verify

Overview

ManufacturerJohn DeereReference

Agricultural Crawler tractorReference

Built in Waterloo, Iowa, USAReference

DrivecrawlerReference

Steeringelectro-hydraulic powerReference

Hydraulic wet disc brakesReference

Cab standard.Reference

Variants

8420wheeled tractorReference

8420TcrawlerReference

Engine

John Deere 8.1L 6-cyl dieselReference

Engine (gross)211.8 kWReference

Engine (net)201.3 kWReference

Engine (max)234.1 kWReference

Drawbar (tested)153.5 kWReference

John DeereReference

turbocharged dieselReference

6-cylinderReference

liquid-cooled inlineReference

Displacement8.1 LReference

Bore/Stroke116 x 129 mmReference

Rated Power (net)201.3 kWReference

Rated Power (gross)211.8 kWReference

Maximum Power (net)223.7 kWReference

Maximum Power (gross)234.1 kWReference

Compression16.5:1Reference

Rated RPM2200Reference

Idle RPM900-2300Reference

Operating RPM1500-2200Reference

Starter volts12Reference

Coolant capacity34.0 LReference

Oil capacity21.5 LReference

Oil change250 hReference

Max power201.8 kWReference

Power at rated engine speed176.5 kWReference

Max power153.5 kWReference

Transmission

16-speed full power shiftReference

TransmissionJohn Deere PowerShiftReference

Typefull power shiftReference

Gears16 forward and 4 reverseReference

Oil capacity246.1 LReference

PTO & Hydraulics

PTO (claimed)175.2 kWReference

PTO (tested)201.8 kWReference

Hydraulic system246.0 LReference

Typeclosed center pressure flow compensated (PFC)Reference

Capacity246.0 LReference

Pressure200.0 barReference

Valves5Reference

Pump flow113.6 lpmReference

Total flow126.8 lpmReference

Total flow160.9 lpmReference

Rear TypeIII/IIINReference

Rear lift6885 kgReference

Rear PTOindependentReference

Rear PTO Type1000 (1-3/4)Reference

Capacities

Fuel492.1 LReference

Max capacity14288 kgReference

Dimensions

Wheelbase226 cmReference

Wheelbase304 cmReference

Weight25950 to 26380 poundsReference

24-inch tracksReference

Length525 cmReference

Length557 cmReference

Width263 cmReference

Width381 cmReference

Height (cab)312 cmReference

Clearance (rear axle)55 cmReference

Clearance (drawbar)44 cmReference

Shipping11770 kgReference

Operating11965 kgReference

Ballasted13061 kgReference

8420T Serial Numbers

Location:Rear of tractorReference

Electrical

GroundnegativeReference

Charging systemalternatorReference

Charging amps150Reference

Batteries2Reference

Battery CCA925Reference

Battery volts12Reference

John Deere 8420T Tracks

Width60 cmReference

Length on ground226 cmReference

Area on ground2.8 m²Reference

Width40 cmReference

Area on ground1.8 m²Reference

Width45 cmReference

Area on ground2.1 m²Reference

Width76 cmReference

Area on ground3.4 m²Reference

Test results

Diesel 16-speed crawlerApril 7 - 27, 2000Link: OCED Tractor Test 1778 fileReference

PTO performanceReference

Fuel use55.3 l/hourReference

Fuel use51.9 l/hourReference

Drawbar performanceReference

Gear 10 used for power test.Reference

Max pull12352 kgReference

Gear 3 used for pull test.Reference

Speeds

Fourth reverse at 1600 RPM.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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