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Tractor · 2002Unverified

John Deere 8120

Name: John Deere 8120
Brand: John Deere

John Deere 8120 — Row-Crop tractor · 208 hp. Reference specifications; pending source verification.

The John Deere 8120 is a tractor rated at 208 hp, placing it at the powerful end of its class. Manufactured from 2002 to 2005, the 8120 features a 6-cylinder turbocharged diesel liquid-cooled engine, paired with mechanical front-wheel drive and a hydrostatic transmission. Its operating weight ranges from 19100 to 22450 pounds. It is suited to operations of 600–1,500 acres.

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

Rated power

208 hp

Max power

148.9 kW

Weight

19100 to 22450 pounds

Catalogue coverage

Variants represented

Richest spec table

124 rows

Recorded power

208 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

Row-Crop tractorReference

Built in Waterloo, Iowa, USAReference

Two- or four-wheel driveReference

Steeringhydrostatic powerReference

Hydraulic wet disc brakesReference

Cab standard.Reference

Variants

8120wheeled tractorReference

8120TcrawlerReference

Engine

John Deere 8.1L 6-cyl dieselReference

Engine (gross)155.1 kWReference

Engine (net)149.1 kWReference

Engine (max)171.5 kWReference

Drawbar (tested)110.7 kWReference

John DeereReference

turbocharged dieselReference

6-cylinderReference

liquid-cooled inlineReference

Displacement8.1 LReference

Bore/Stroke116 x 129 mmReference

Rated Power (net)149.1 kWReference

Rated Power (gross)155.1 kWReference

Maximum Power (net)164.1 kWReference

Maximum Power (gross)171.5 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 capacity21.5 LReference

Oil change250 hReference

Max power148.9 kWReference

Power at rated engine speed128.4 kWReference

Max power110.7 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)126.8 kWReference

PTO (tested)148.9 kWReference

Hydraulic system140.0 LReference

Hydraulic system149.9 LReference

Typeclosed center pressure-flow compensated (PFC)Reference

Capacity140.0 LReference

Capacity149.9 LReference

Pressure200.0 barReference

Valves5Reference

SCV flow113.6 lpmReference

Total flow126.8 lpmReference

Total flow160.9 lpmReference

Rear TypeIII,IIINReference

Rear lift5579 kgReference

Rear lift6885 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

Fuel511.0 LReference

Fuel605.6 LReference

Front hubs3.4 LReference

Front hubs4.0 LReference

Front diff.13.4 LReference

Dimensions

2WD Wheelbase313 cmReference

4WD Wheelbase296 cmReference

ILS Wheelbase293 cmReference

ILS Wheelbase302 cmReference

Weight19100 to 22450 poundsReference

Front tire11.00-24Reference

Rear tire480/80R46Reference

Standard tires (ag)Front: 11.00-24. Rear: 480/80R46Reference

Length533 cmReference

Length538 cmReference

Height (cab)305 cmReference

Front axle2WDReference

Front axleMFWDReference

Front axleMFWD ILSReference

Rack-and-pinion rear axle99 by 2806 mmReference

Rack-and-pinion rear axle99 by 3009 mmReference

Rack-and-pinion rear axle110 by 3009 mmReference

Rack-and-pinion rear axle119 by 3009 mmReference

2WD Front tread152 to 223 cmReference

4WD Front tread152 to 203 cmReference

ILS Front tread152 to 223 cmReference

Shipping8663 kgReference

Shipping9548 kgReference

Shipping9820 kgReference

Shipping10183 kgReference

Operating9099 kgReference

Max Drawbar1769 kgReference

Max Drawbar2753 kgReference

Max Drawbar4536 kgReference

8120 Serial Number Location

Rear of tractor.Reference

8120 Serial Numbers

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 4WDMarch 28 - April 8, 2003Link: OCED Tractor Test 1819 fileReference

PTO performanceReference

Fuel use39.7 l/hourReference

Fuel use38.2 l/hourReference

Drawbar performanceReference

Fuel use38.6 l/hourReference

Gear 8 used for power test.Reference

Max pull10118 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.

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