John Deere 8420 Specs ( 2002-2005 )
Production
| Description | Row-Crop tractor / Built in Waterloo, Iowa, USA |
|---|---|
| Manufacturer | John Deere |
Engine
| Engine type | John Deere 8.1L 6-cyl diesel |
|---|---|
| Air cleaner | dry with secondary element |
| Bore/Stroke | 4.56x5.06 inches (116 x 129 mm) |
| Compression | 16.5:1 |
| Coolant capacity | 35.9 qts (34.0 L) |
| Description | John Deere / turbocharged diesel / 6-cylinder / liquid-cooled inline |
| Displacement | 496 ci (8.1 L) |
| Emissions | Tier II |
| Fuel system | electronic high-pressure common rail (HPCR) |
| Idle RPM | 900-2300 |
| Maximum Power (gross) | 314 hp (234.1 kW) |
| Maximum Power (net) | 300 hp (223.7 kW) |
| Operating RPM | 1500-2200 |
| Rated Power (gross) | 284 hp (211.8 kW) |
| Rated Power (net) | 270 hp (201.3 kW) |
| Rated RPM | 2200 |
| Starter volts | 12 |
| Oil capacity | 28.5 qts (27.0 L) |
| Oil change | 250 h |
| Drawbar (tested) | 207.49 hp (154.7 kW) |
| Engine (gross) | 284 hp (211.8 kW) |
| Engine (max) | 314 hp (234.1 kW) |
| Engine (net) | 270 hp (201.3 kW) |
| PTO (claimed) | 235 hp (175.2 kW) |
| PTO (tested) | 269.41 hp (200.9 kW) |
Transmission
| Clutch | hydraulic wet disc |
|---|---|
| Gears | 16 forward and 4 reverse |
| Oil capacity | 148 qts (140.1 L) |
| Transmission | John Deere PowerShift |
| Transmission type | 16-speed full power shift |
| Type | full power shift |
Mechanical
| Cab | Cab standard. |
|---|---|
| Description | Hydraulic wet disc brakes |
| Drive type | Four-wheel drive |
| Steering | hydrostatic power |
| Trailer brakes | hydraulic OptOptional |
Capacity
| Front diff. | 14.2 qts (13.4 L) |
|---|---|
| Front hubs | 3.6 qts (3.4 L) |
| Fuel | 160 gal (605.6 L) |
| Hydraulic system | 37 gal (140.0 L) |
| ILS Front hubs | 4.2 qts (4.0 L) |
| ILS Hydraulic system | 39.6 gal (149.9 L) |
Hydraulics
| Capacity | 37 gal (140.0 L) |
|---|---|
| ILS Capacity | 39.6 gal (149.9 L) |
| Pressure | 2900 psi (200.0 bar) |
| SCV flow | 30 gpm (113.6 lpm) |
| Total flow | 33.5 gpm*With standard 45cc pump (126.8 lpm) |
| Type | closed center pressure-flow compensated (PFC) |
| Valves | 4 to 5 |
Hitch
| Front Hitch | IIIN OptOptional |
|---|---|
| Front lift | 11000 lbs (4989 kg) |
| Rear lift | 15180 lbs (6885 kg) |
| Rear Type | III/IIIN |
PTO
| Clutch | hydraulic wet discs |
|---|---|
| Engine RPM | 540@1975 |
| Rear PTO | independent |
| Rear PTO Type | 1000 (1.75) |
Electrical
| Batteries | 2 |
|---|---|
| Battery CCA | 925 |
| Battery volts | 12 |
| Charging amps | 150 |
| Charging system | alternator |
| Ground | negative |
Dimensions & Tires
| 4WD Front tread | 60 to 80 inches (152 to 203 cm) |
|---|---|
| Front axle | 4WD / Independent Link Suspension |
| Height (cab) | 122.2 inches (310 cm) |
| ILS Front tread | 60 to 88 inches (152 to 223 cm) |
| Length | 211.9 inches (538 cm) |
| Rack-and-pinion rear axle | 4.331 by 118.5 inches (110 by 3009 mm) / 4.724 by 118.5 inches (119 by 3009 mm) |
| Wheelbase | 118.9 inches (302 cm) |
| Front tire | 16.9R30 |
| Rear tire | 18.4R46 |
| Weight | 21650 to 23780 pounds |
| Wheelbase | 118.9 inches (302 cm) |
| Ag front | 16.9R30 |
| Ag rear | 18.4R46 |
8420 Serial Numbers
| 2002 | 1001 |
|---|---|
| 2003 | 10001 |
| 2004 | 20001 |
| 2005 | 30001 |
| Description | FAQ: How to read a serial number table. |
| Location: | Serial number plate on rear of tractor. |
John Deere 8420 Weight
| ILS Shipping | 23,050 lbs (10455 kg) |
|---|---|
| Max Drawbar | 3,900 lbs (Cat 3 extended) (1769 kg) |
| Operating | 23,780 lbs (480/80R46 duals) (10786 kg) |
| Shipping | 21,650 lbs (9820 kg) |
OCED Tractor Test 1800
| Description | Diesel 16-speed 4WDMay 7 - 31, 2002Link: OCED Tractor Test 1800 file / PTO performance / Drawbar performance / Gear 8 used for power test. / Gear 3 used for pull test. |
|---|---|
| Fuel use | 14.5 gal/hour (54.9 l/hour) / 13.7 gal/hour (51.9 l/hour) / 13.6 gal/hour (51.5 l/hour) |
| Max power | 269.41 hp (200.9 kW) / 207.49 hp (154.7 kW) |
| Max pull | 29,964 lbs (13591 kg) |
| Power at rated engine speed | 235.45 hp (175.6 kW) |
Speeds
| Description | With 18.4R46 rear tires. |
|---|
Variants
| 8420 | wheeled tractor |
|---|---|
| 8420T | crawler |