Tractor · 2002Unverified
John Deere 8420
John Deere 8420 — Row-Crop tractor · 284 hp. Reference specifications; pending source verification.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
284 hp
Max power
200.9 kW
Weight
21650 to 23780 pounds
Hover a source tag to verify
Overview
ManufacturerJohn DeereReference
Row-Crop tractorReference
Built in Waterloo, Iowa, USAReference
Four-wheel driveReference
Steeringhydrostatic powerReference
Hydraulic wet disc brakesReference
Trailer brakeshydraulicReference
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)154.7 kWReference
John DeereReference
turbocharged dieselReference
6-cylinderReference
liquid-cooled inlineReference
Displacement8.1 LReference
Bore/Stroke116 x 129 mmReference
EmissionsTier IIReference
Rated Power (net)201.3 kWReference
Rated Power (gross)211.8 kWReference
Maximum Power (net)223.7 kWReference
Maximum Power (gross)234.1 kWReference
Fuel systemelectronic high-pressure common rail (HPCR)Reference
Air cleanerdry with secondary elementReference
Compression16.5:1Reference
Rated RPM2200Reference
Idle RPM900-2300Reference
Operating RPM1500-2200Reference
Starter volts12Reference
Coolant capacity34.0 LReference
Oil capacity27.0 LReference
Oil change250 hReference
Max power200.9 kWReference
Power at rated engine speed175.6 kWReference
Max power154.7 kWReference
Transmission
16-speed full power shiftReference
TransmissionJohn Deere PowerShiftReference
Typefull power shiftReference
Gears16 forward and 4 reverseReference
Clutchhydraulic wet discReference
Oil capacity140.1 LReference
Oil capacity149.9 LReference
Full power shift transmission with single shift lever with display on cab corner post. Tractor begins in 7 (forward) and 2 (reverse) on start up. Clutch pedal may be used to pre-select a gear by holding clutch and pressing lever until desired gear is reached. Automatic PowerShift (APS) allows automated shifting to match load.Reference
PTO & Hydraulics
PTO (claimed)175.2 kWReference
PTO (tested)200.9 kWReference
Hydraulic system140.0 LReference
ILS Hydraulic system149.9 LReference
Typeclosed center pressure-flow compensated (PFC)Reference
Capacity140.0 LReference
ILS Capacity149.9 LReference
Pressure200.0 barReference
Valves4 to 5Reference
SCV flow113.6 lpmReference
Total flow126.8 lpmReference
Total flow160.9 lpmReference
Rear TypeIII/IIINReference
Rear lift6885 kgReference
Rear lift7847 kgReference
Front HitchIIINReference
Front lift4989 kgReference
Rear PTOindependentReference
Clutchhydraulic wet discsReference
Rear PTO Type1000 (1.75)Reference
Rear PTO Type540/1000 (1.375 optional)Reference
Engine RPM540@1975Reference
Engine RPM1000@2200Reference
Capacities
Fuel605.6 LReference
Front hubs3.4 LReference
ILS Front hubs4.0 LReference
Front diff.13.4 LReference
Dimensions
Wheelbase302 cmReference
Wheelbase298 cmReference
Weight21650 to 23780 poundsReference
Front tire16.9R30Reference
Rear tire18.4R46Reference
Ag front16.9R30Reference
Ag rear18.4R46Reference
Length538 cmReference
Height (cab)310 cmReference
Front axle4WDReference
Front axleIndependent Link SuspensionReference
Rack-and-pinion rear axle110 by 3009 mmReference
Rack-and-pinion rear axle119 by 3009 mmReference
4WD Front tread152 to 203 cmReference
ILS Front tread152 to 223 cmReference
Shipping9820 kgReference
ILS Shipping10455 kgReference
Operating10786 kgReference
Max Drawbar1769 kgReference
Max Drawbar2753 kgReference
Max Drawbar4536 kgReference
8420 Serial Numbers
Location:Serial number plate on rear of tractor.Reference
20021001Reference
200310001Reference
200420001Reference
200530001Reference
FAQ: How to read a serial number table.Reference
Electrical
GroundnegativeReference
Charging systemalternatorReference
Charging amps150Reference
Batteries2Reference
Battery CCA925Reference
Battery volts12Reference
Test results
Diesel 16-speed 4WDMay 7 - 31, 2002Link: OCED Tractor Test 1800 fileReference
PTO performanceReference
Fuel use54.9 l/hourReference
Fuel use51.9 l/hourReference
Drawbar performanceReference
Fuel use51.5 l/hourReference
Gear 8 used for power test.Reference
Max pull13591 kgReference
Gear 3 used for pull test.Reference
Speeds
With 18.4R46 rear tires.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.