Specifications
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| Model information | |
| Production years | 2002 - 2005 |
| Series | 8020 Series |
| Equipment type | Row-Crop tractor |
| Production | |
| Manufacturer | John Deere |
| Equipment type | Row-Crop tractor |
| Built in | Built in Waterloo, Iowa, USA |
| Variants | |
| 8420 | wheeled tractor |
| 8420T | crawler |
| John Deere 8420 Engine | |
| Engine | John Deere 8.1L 6-cyl diesel |
| Details | Engine details ... |
| John Deere 8420 Transmission | |
| Transmission | 16-speed full power shift |
| Details | Transmission details ... |
| 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 |
| Details | Performance test details ... |
| Mechanical | |
| Drive | Four-wheel drive |
| Steering | hydrostatic power |
| Brakes | Hydraulic wet disc brakes |
| Trailer brakes | hydraulic (optional) |
| Cab / ROPS | Cab standard. |
| 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*With standard 45cc pump 126.8 lpm 42.5 gpm*Optional 57cc pump 160.9 lpm |
| Tractor hitch | |
| Rear Type | III/IIIN |
| Rear lift | 15180 lbs 6885 kg 17300 lbs (optional) 7847 kg |
| Front Hitch | IIIN (optional) |
| Front lift | 11000 lbs 4989 kg |
| Power Take-off (PTO) | |
| Rear PTO | independent |
| Clutch | hydraulic wet discs |
| Rear PTO Type | 1000 (1.75)
540/1000 (1.375 optional)
|
| Engine RPM | 540@1975
1000@2200
|
| Dimensions & Tires | |
| 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 |
| Details | Full dimensions and tires ... |
| 8420 Serial Numbers | |
| Location: | Serial number plate on rear of tractor. |
| 2002 | 1001 |
| 2003 | 10001 |
| 2004 | 20001 |
| 2005 | 30001 |
| Details | FAQ: How to read a serial number table. |
| Electrical | |
| Ground | negative |
| Charging system | alternator |
| Charging amps | 150 |
| Batteries | 2 |
| Battery CCA | 925 |
| Battery volts | 12 |
Values may vary by engine, transmission or configuration. View source page
Model family
Series map
- 263.0 hp
- 8420 Current model284.0 hp
- 8520305.0 hp