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| info | |
| 2002 - 2005 8020 Series, Row-Crop tractor | |
| Previous model: | John Deere 8410 |
| Next model: | John Deere 8430 |
| Series next: | John Deere 8520 |
| Series back: | John Deere 8320 |
| Production | |
| Manufacturer: | John Deere |
| Factory: | Waterloo, Iowa, USA |
| Variants | |
| 8420: | wheeled tractor |
| 8420T: | crawler |
| 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] |
| 3-Point 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 |
| 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 |
| 8420 Serial Numbers | |
| Location: | Serial number plate on rear of tractor. |
| 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] |
| Mechanical | |
| Chassis: | 4x4 MFWD 4WD |
| Steering: | hydrostatic power |
| Brakes: | hydraulic wet disc |
| Trailer brakes: | hydraulic*Optional |
| Cab: | Cab standard. |
| 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 |
| Electrical | |
| Ground: | negative |
| Charging system: | alternator |
| Charging amps: | 150 |
| Battery | |
| Number: | 2 |
| Cold-cranking amps: | 925 |
| Volts: | 12 |
| info | |
| 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 |
| Oil capacity: | 28.5 qts [27.0 L] |
| Oil change: | 250 h |
| Coolant capacity: | 35.9 qts [34.0 L] |
| Engine Detail | |
| John Deere, turbocharged diesel, 6-cylinder, liquid-cooled inline, 496 ci [8.1 L] |
| info | |
| Speeds: | With 18.4R46 rear tires. |
| 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. | |
| info | |
| Previous model: | John Deere 8410 |
| Next model: | John Deere 8430 |
| Series next: | John Deere 8520 |
| Series back: | John Deere 8320 |
| Dimensions | |
| Weight (shipping): | 21,650 lbs [9820 kg] |
| ILS Weight (shipping): | 23,050 lbs [10455 kg] |
| Weight (operating): | 23,780 lbs [10786 kg] (480/80R46 duals) |
| Drawbar capacity: | 3,900 lbs [1769 kg] (Cat 3 extended), 6,070 lbs [2753 kg] (Cat 3 short), 10,000 lbs [4536 kg] (Cat 4) |
| 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 Independent Link Suspension (ILS) |
| Rear axle: | Rack-and-pinion: 4.331 by 118.5 inches [110x3009 mm] Rack-and-pinion: 4.724 by 118.5 inches [119x3009 mm] |
| 4WD [152 to 203 cm] 4WD} 60 to 88 inches {ILS} [152 to 223 cm] {ILS} Front tread: | 60 to 80 inches |
| John Deere 8420 Tires | |
| Ag front: | 16.9R30 |
| Ag rear: | 18.4R46 |