John Deere 8420

2002 - 2005

8020 Series

Row-Crop tractor

Manufacturer

John Deere

Row-Crop tractor

Built in Waterloo, Iowa, USA

8420

wheeled tractor

8420T

crawler

John Deere 8.1L 6-cyl diesel

16-speed full power shift

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

Four-wheel drive

Steering

hydrostatic power

Hydraulic wet disc brakes

Trailer brakes

hydraulic OptOptional

Cab standard.

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

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*With standard 45cc pump 126.8 lpm

42.5 gpm*Optional 57cc pump 160.9 lpm

Rear Type

III/IIIN

Rear lift

15180 lbs 6885 kg

17300 lbsOptOptional 7847 kg

Front Hitch

IIIN OptOptional

Front lift

11000 lbs 4989 kg

Rear PTO

independent

Clutch

hydraulic wet discs

Rear PTO Type

1000 (1.75)

540/1000 (1.375 optional)

Engine RPM

540@1975

1000@2200

Wheelbase

118.9 inches 302 cm

117.7 inches (ILS) 298 cm

Weight

21650 to 23780 pounds

Front tire

16.9R30

Rear tire

18.4R46

Ground

negative

Charging system

alternator

Charging amps

150

Batteries

2

Battery CCA

925

Battery volts

12

Manufacturer

John Deere

Configuration

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 (net)

270 hp 201.3 kW

Rated Power (gross)

284 hp 211.8 kW

Maximum Power (net)

300 hp 223.7 kW

Maximum Power (gross)

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

Oil capacity

28.5 qts 27.0 L

Oil change

250 h

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 (ILS) 149.9 L

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.

With 18.4R46 rear tires.

Ag front

16.9R30

Ag rear

18.4R46

Wheelbase

118.9 inches 302 cm

117.7 inches (ILS) 298 cm

Length

211.9 inches 538 cm

Height (cab)

122.2 inches 310 cm

Front axle

4WD

Front axle

Independent Link Suspension

Rack-and-pinion rear axle

4.331 by 118.5 inches 110 by 3009 mm

Rack-and-pinion rear axle

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

Shipping

21,650 lbs 9820 kg

ILS Shipping

23,050 lbs 10455 kg

Operating

23,780 lbs (480/80R46 duals) 10786 kg

Max Drawbar

3,900 lbs (Cat 3 extended) 1769 kg

6,070 lbs (Cat 3 short) 2753 kg

10,000 lbs (Cat 4) 4536 kg

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.