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Years in Production / 2002–2005
John Deere
8420
Explore the specifications, hardware, and original references for the John Deere 8420.
284hp
Source index power
MFWD Optional
Drive
2002–2005
Production years
John Deere
Manufacturer
8420 / 01
At a glance
Overview
2002 - 2005
8020 Series
Row-Crop tractor
Production
Row-Crop tractor
Built in Waterloo, Iowa, USA
- Manufacturer
- John Deere
Mechanical
Four-wheel drive
Hydraulic wet disc brakes
Cab standard.
- Steering
- hydrostatic power
- Trailer Brakes
- hydraulic OptOptional
Capacity
- Fuel
- 160 gal605.6 L
- Hydraulic System
- 37 gal140.0 L
- Ils Hydraulic System
- 39.6 gal149.9 L
- Front Hubs
- 3.6 qts3.4 L
- Ils Front Hubs
- 4.2 qts4.0 L
- Front Diff
- 14.2 qts13.4 L
Hydraulics
- Type
- closed center pressure-flow compensated (PFC)
- Capacity
- 37 gal140.0 L
- Ils Capacity
- 39.6 gal149.9 L
- Pressure
- 2900 psi200.0 bar
- Valves
- 4 to 5
- Scv Flow
- 30 gpm113.6 lpm
- Total Flow
- 33.5 gpm*With standard 45cc pump126.8 lpm
- Total Flow
- 42.5 gpm*Optional 57cc pump160.9 lpm
Hitch
- Rear Type
- III/IIIN
- Rear Lift
- 15180 lbs6885 kg
- Rear Lift
- 17300 lbsOptOptional7847 kg
- Front Hitch
- IIIN OptOptional
- Front Lift
- 11000 lbs4989 kg
Pto
- Rear Pto
- independent
- Clutch
- hydraulic wet discs
- Rear Type
- 1000 (1.75)
- Rear Type
- 540/10001.375 optional
- Engine Rpm
- 540@1975
- Engine Rpm
- 1000@2200
Electrical
- Ground
- negative
- Charging System
- alternator
- Charging Amps
- 150
- Batteries
- 2
- Battery Cca
- 925
- Battery Volts
- 12
8420 / 02
Under the hood
Engine Detail
John Deere
turbocharged diesel
6-cylinder
liquid-cooled inline
- Displacement
- 496 ci8.1 L
- Bore Stroke
- 4.56x5.06 inches116 x 129 mm
- Emissions
- Tier II
- Rated Power Net
- 270 hp201.3 kW
- Rated Power Gross
- 284 hp211.8 kW
- Maximum Power Net
- 300 hp223.7 kW
- Maximum Power Gross
- 314 hp234.1 kW
- Fuel System
- electronic high-pressure common rail (HPCR)
- Air Cleaner
- dry with secondary element
- Compression Ratio
- 16.5:1
- Rated Rpm
- 2200
- Idle Rpm
- 900-2300
- Operating Rpm
- 1500-2200
- Starter Volts
- 12
- Coolant Capacity
- 35.9 qts34.0 L
- Cylinders
- 6
- Cooling
- liquid-cooled inline
- Oil Capacity
- 28.5 qts27.0 L
- Oil Change
- 250 h
Engine Options
John Deere 8.1L 6-cyl diesel
8420 / 03
Gears & controls
Transmission
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.
- Transmission
- John Deere PowerShift
- Transmission Type
- full power shift
- Gears
- 16 forward and 4 reverse
- Clutch
- hydraulic wet disc
- Oil Capacity
- 148 qts140.1 L
- Oil Capacity
- 158.4 qts (ILS)149.9 L
- Speeds Description
- With 18.4R46 rear tires.
John Deere8420 Transmission
16-speed full power shift
8420 / 04
Size. Stance. Footprint.
Dimensions
- Length
- 211.9 in538 cm
- Height (cab)
- 122.2 in310 cm
- Wheelbase
- 117.7 in298 cm
- Front tread
- 60 in152 cm
- Max drawbar
- 10,000 lbs4,536 kg
Dimensions And Tires
- Wheelbase
- 118.9 inches302 cm
- Wheelbase
- 117.7 inches (ILS)298 cm
- Weight
- 21650 to 23780 pounds
- Front Tire
- 16.9R30
- Rear Tire
- 18.4R46
Tires And Tracks
- Front Ag
- 16.9R30
- Rear Ag
- 18.4R46
8420 / 05
Tractor Photos
See it in action
Videos
Watch John Deere 8420 videos from their original YouTube creators.
8420 / 07
Tests (NTTL)
Oced Tractor Test1800
Diesel 16-speed 4WDMay 7 - 31, 2002Link: OCED Tractor Test 1800 file
PTO performance
Drawbar performance
Gear 8 used for power test.
Gear 3 used for pull test.
- Max Power
- 269.41 hp200.9 kW
- Max Power
- 207.49 hp154.7 kW
- Fuel Use
- 14.5 gal/hour54.9 l/hour
- Fuel Use
- 13.7 gal/hour51.9 l/hour
- Fuel Use
- 13.6 gal/hour51.5 l/hour
- Power At Rated Engine Speed
- 235.45 hp175.6 kW
- Max Pull
- 29,964 lbs13591 kg