John Deere 8420

John Deere 8420 Row-Crop tractor Technical Specifications

John Deere 8420 is a Row-Crop tractor that was produced by the John Deere between 2002 – 2005.

Below you will find detailed technical specifications for John Deere 8420 covering engine types, horsepower ratings, weight, height, fuel type and tank volume, oil capacity and type, hydraulic system diagram, wiring diagram, battery specs, etc.

John Deere 8420 Production











Manufacturer:
Manufacturer: John Deere
Type: Row-Crop tractor
Factory: Waterloo, Iowa, USA


John Deere 8420 Power



















Engine:
Engine (gross): 284 hp
211.8 kW
Engine (net): 270 hp
201.3 kW
Engine (max): 314 hp
234.1 kW
PTO (claimed): 235 hp
175.2 kW
Drawbar (tested): 207.49 hp
154.7 kW
PTO (tested): 269.41 hp
200.9 kW

John Deere 8420 Electrical



















Ground: negative
Charging system: alternator
Charging amps: 150
Batteries: 2
Battery CCA: 925
Battery volts: 12

John Deere 8420 Mechanical

























Chassis: 4×4 MFWD 4WD
Steering: hydrostatic power
Brakes: hydraulic wet disc
Trailer brakes: hydraulic*Optional
Cab: Cab standard.
Transmission: 16-speed full power shift

Capacity



















Fuel: 160 gal
605.6 L
Hydraulic system: 37 gal
140.0 L
ILS Hydraulic system: 39.6 gal
149.9 L
Front hubs: 3.6 qts
3.4 L
ILS Front hubs: 4.2 qts
4.0 L
Front diff.: 14.2 qts
13.4 L

Hydraulics

























Type: closed center pressure-flow compensated (PFC)
Capacity: 37 gal
140.0 L
ILS Capacity: 39.6 gal
149.9 L
Pressure: 2900 psi
200.0 bar
Valves: 4 to 5
SCV flow: 30 gpm
113.6 lpm
Total flow: 33.5 gpm
126.8 lpm *With standard 45cc pump
  42.5 gpm
160.9 lpm *Optional 57cc pump

Tracktor Hitch
















Rear Type: III/IIIN
Rear lift: 15180 lbs
6885 kg
  17300 lbs
7847 kg *Optional
Front Hitch: IIIN*Optional
Front lift: 11000 lbs
4989 kg

Power Take-off (PTO)
















Rear PTO: independent
Clutch: hydraulic wet discs
Rear RPM: 1000 (1.75)
  540/1000 (1.375 optional)
Engine RPM: 540@1975
1000@2200

John Deere 8420 Engine detail























































Engine Detail
John Deere
turbocharged diesel
6-cylinder
liquid-cooled inline
Displacement: 496 ci
8.1 L
Bore/Stroke: 4.56×5.06 inches
116 x 129 mm
Emissions: Tier II
Rated Power (ECE R24): 270 hp
201.3 kW
Rated Power (EC 97/98): 284 hp
211.8 kW
Maximum Power (ECE R24): 300 hp
223.7 kW
Maximum Power (EC 97/68): 314 hp
234.1 kW
Fuel system: electronic high-pressure common rail (HPCR)
Air cleaner: dry with secondary element
Compression: 16.5:1
Rated RPM: 2200
Idle RPM: 900-2300
Operating RPM: 1500-2200
Starter volts: 12
Coolant capacity: 35.9 qts
34.0 L



John Deere 8420 Transmission overview

Engine Oil




















Transmission: John Deere PowerShift
Type: full power shift
Gears: 16 forward and 4 reverse
Clutch: hydraulic wet disc
Oil capacity: 148 qts
140.1 L
  158.4 qts
149.9 L (ILS)
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.

John Deere 8420 Dimensions































Wheelbase: 118.9 inches
302 cm
  117.7 inches
298 cm (ILS)
Length: 211.9 inches
538 cm
Height (cab): 122.2 inches
310 cm
Front axle: 4WD
Front axle: Independent Link Suspension
Rear axle: Rack-and-pinion: 4.331 by 118.5 inches
110 by 3009 mm
Rear axle: Rack-and-pinion: 4.724 by 118.5 inches
119 by 3009 mm
4WD Front tread: 60 to 80 inches
152 to 203 cm
ILS Front tread: 60 to 88 inches
152 to 223 cm






















John Deere 8420 Weight
Shipping: 21,650 lbs
9820 kg
ILS Shipping: 23,050 lbs
10455 kg
Operating: 23,780 lbs
10786 kg (480/80R46 duals)
Max Drawbar: 3,900 lbs
1769 kg (Cat 3 extended)
  6,070 lbs
2753 kg (Cat 3 short)
  10,000 lbs
4536 kg (Cat 4)

John Deere 8420 Tests

OCED Tractor Test 1800













































OCED Tractor Test 1800
Diesel 16-speed 4WD
May 7 – 31, 2002
Link: OCED Tractor Test 1800 file
PTO performance
Max power: 269.41 hp
200.9 kW
Fuel use: 14.5 gal/hour
54.9 l/hour
Power at rated engine speed: 235.45 hp
175.6 kW
Fuel use: 13.7 gal/hour
51.9 l/hour
Drawbar performance
Max power: 207.49 hp
154.7 kW
Fuel use: 13.6 gal/hour
51.5 l/hour
Gear 8 used for power test.
Max pull: 29,964 lbs
13591 kg
Gear 3 used for pull test.

FAQ

Is John Deere 8420 a good tractor?

The John Deere 8420 is one of the great tractors in the John Deere stable, and it has earned John Deere a fantastic reputation.

How much oil does a John Deere 8420 take?

Check out the John Deere 8420 oil capacity and oil type in the engine specs section as it may vary across the engines. Keep in mind, that older models might have their oil capacity increased over time. You may compare between the early and late oil capacity.

Do tractors have VIN numbers?

Every tractor has a VIN number. The number is usually engraved below the driver’s seat. Tractor manufacturers put the number in different places on the tractor body.

What was the last year John Deere made the 8320

The John Deere 8420 was an agricultural tractor model made from 2002 – 2005

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