John Deere 8420 tractor was designed in 1984 and it was released to the public that same year. It is available in both 6×6 and 8×8 configurations. The engine used in this tractor is a diesel engine which provides a high level of power and efficiency. The 8420 also comes with several features that make it a very popular choice among farmers and ranchers. These features include its large tires, its easy-to-use controls, and its durable construction.
John Deere 8420 Specifications:
| MANUFACTURER: | john deere |
| MODEL: | 8420 |
| Weight (shipping) | 21,650 lbs or 9820 kg |
| Weight (operating) | 23,780 lbs or 10786 kg |
| Starter | Electric |
| ILS Weight (shipping) | 23,050 lbs or 10455 kg |
| Height (cab) | 122.2 in. (310 cm) |
| Front axle | 4WD Independent Link Suspension (ILS) |
| Engine type | Four-stroke, liquid-cooled, inline |
| Engine model | John Deere |
| Drawbar capacity | 3,900 lbs (1769 kg) (Cat 3 extended) |
| Displacement | 8.1 L, 8,128 cm2, (496.0 cu·in) |
| Cylinders | 6 |
| Bore and stroke | 116.0 mm X 129.0 mm or 4.57 in X 5.08 in |
| AG front tires | 16.9R30 |
| AG rear tires | 18.4R46 |
| Brakes | Hydraulic wet disc |
| Chassis | 4×4 MFWD 4WD |
| Front tread size | 60 to 80 in. |
| Gears | 16 forward and 4 reverse |
| Ground clearance | – |
| Height | 122.2 in. [310 cm] |
| Length | 211.9 in. [538 cm] |
| Speed | Forward: 39.9 kmh (24.8 mph) Reverse: 10.9 kmh (6.8 mph) |
| Steering type | Hydrostatic power |
| Transmission model | John Deere PowerShift |
| Transmission oil capacity | 140.1 L (37.0 US. gal, 30.8 Imp. gal.) |
| Transmission type | Full power shift with hydraulic wet disc clutch |
| Wheelbase | 118.9 in. [302 cm] |
| Width | – |
| Starter volts | 12 |
| Rated RPM | 2200 |
| Rated Power (ECE R24) | 270 hp / 201.3 kW |
| Operating RPM | 1500-2200 |
| Oil change | 250 h |
| Oil capacity | 28.5 qts (27.0 L) |
| Idle RPM | 900-2300 |
| Fuel system | electronic high-pressure common rail (HPCR) |
| Emissions | Tier II |
| Coolant capacity | 35.9 qts / 34.0 L |
| Compression | 16.5:1 |
| Bore/Stroke | 4.56×5.06 in. (116 x 129 mm) |
| Air cleaner | dry with secondary element |
| Compression ratio | 16.5:1 |
| Engine size | 496 ci or 8.1 L |
| Engine torque | – |
| Engine torque RPM | – |
| Fuel injection system | electronic high-pressure common rail (HPCR) |
| Fuel tank capacity | 160 gal or 605.6 L |
| Fuel type | diesel |
| Horsepower | 314 hp or 234.1 kW |
| Maximum Power (EC 97/68) | 314 hp / 234.1 kW |
| Maximum Power (ECE R24) | 300 hp / 223.7 kW |
| Number of cylinders | 6 cylinders |
| Power RPM | 2200 (rpm) |
| Rated Power (EC 97/98) | 284 hp / 211.8 kW |
| Valves | 4 to 5 |
| Total flow | 42.5 gpm (160.9 lpm) |
| SCV flow | 30.0 gpm (113.6 lpm) |
| Pressure | 2900 psi (199.9 bar) |
| Oil tank capacity | 28.5 qts or 27.0 L |
| Number of batteries | 2 |
| Hydraulic type | Closed center pressure-flow compensated (PFC) |
| Engine starter volts | 12V |
| Electric ground force | negative |
| Electric charging system | alternator |
| Electric charging Amps | 150 amps |
| Bore stroke | 4.56×5.06 in. or (116 x 129 mm) |
| Battery voltage | 12 V |
| Battery cold cranking Amps | 925 |
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John Deere 8420 is a great tractor for the money. It has a lot of features that make it ideal for the average farmer or landowner. Between its powerful engine and comfortable ride, this machine is sure to get the job done. If you’re in the market for a reliable tractor, this is one that we would recommend.
