John Deere 8420 tractor specifications

2002 - 2005

2002 - 2005 8020 SeriesRow-Crop tractor

Production

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

Variants

Variants 8420:wheeled tractor
8420T:crawler

2002 - 2005

8020 Series

Row-Crop tractor

Production

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

Variants

Variants
8420:	wheeled tractor
8420T:	crawler

John Deere 8420 Power

John Deere 8420 Power
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
power test details ...

John Deere 8420 Engine

John Deere 8420 Engine
John Deere 8.1L 6-cyl diesel
Engine details ...

Mechanical

Mechanical
Chassis:	4x4 MFWD 4WD
Steering:	hydrostatic power
Brakes:	hydraulic wet disc
Trailer brakes:	hydraulic*Optional
Cab:	Cab standard.
Transmission:	16-speed full power shift
Transmission details ...

Capacity

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

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

Tractor hitch

Tractor 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)

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

Dimensions & Tires

Dimensions & Tires
Wheelbase:	118.9 inches 302 cm
	117.7 inches 298 cm (ILS)
Weight:	21650 to 23780 pounds
Front tire:	16.9R30
Rear tire:	18.4R46
Full dimensions and tires ...

8420 Serial Numbers

8420 Serial Numbers
Location:	Serial number plate on rear of tractor.
2002:	1001
2003:	10001
2004:	20001
2005:	30001
how to read serial numbers...

Electrical

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

John Deere 8420 Power

John Deere 8420 Power 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
power test details ...

2002 - 2005

8020 Series

Row-Crop tractor

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.

John Deere 8420 Engine

John Deere 8420 Engine John Deere 8.1L 6-cyl diesel Engine details ...

2002 - 2005

8020 Series

Row-Crop tractor

Engine Detail

Engine Detail
John Deere
turbocharged diesel
6-cylinder
liquid-cooled inline
Displacement:	496 ci 8.1 L
Bore/Stroke:	4.56x5.06 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

Engine Oil

Engine Oil

Oil capacity:	28.5 qts 27.0 L
Oil change:	250 h

Mechanical

Mechanical Chassis:4x4 MFWD 4WD
Steering:hydrostatic power
Brakes:hydraulic wet disc
Trailer brakes:hydraulic*Optional
Cab:Cab standard.
Transmission:16-speed full power shift
Transmission details ...

2002 - 2005

8020 Series

Row-Crop tractor

Transmission

Transmission
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.

Speeds

Speeds
With 18.4R46 rear tires.

Capacity

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

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

Tractor hitch

Tractor 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)

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

Dimensions & Tires

Dimensions & Tires Wheelbase:118.9 inches
302 cm
117.7 inches
298 cm (ILS)
Weight:21650 to 23780 pounds
Front tire:16.9R30
Rear tire:18.4R46
Full dimensions and tires ...

2002 - 2005

8020 Series

Row-Crop tractor

John Deere 8420 Tires

John Deere 8420 Tires
Ag front:	16.9R30
Ag rear:	18.4R46

Dimensions

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

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)