John Deere 8420

John Deere 8420The John Deere 8420 is a 4WD row-crop tractor from the 8020 series. This tractor was manufactured by John Deere in Waterloo, Iowa, USA from 2002 to 2005. The John Deere 8420 is equipped with a 8.1 L (496.0 cu·in) six-cylinder diesel engine and a full power shift transmission with 16 forward and 4 reverse gears and hydraulic wet disc clutch.

The JD 8420 row-crop tractor used the John Deere engine. It is a 8.1 L, 8,128 cm2, (496.0 cu·in) six-cylinder turbocharged diesel engine with 116.0 mm (4.57 in) of the cylinder bore and 129.0 mm (5.08 in) of the piston stroke. The compression ratio rating is 16.5:1. This engine produced 273.8 PS (201.3 kW; 270.0 HP) at 2,200 rpm of net output power.

The JD 8420 is equipped with hydrostatic power steering, hydraulic wet disc brakes, cab (standard), and 605.6 liters (160 US gal.; 133.2 Imp. gal) fuel tank.

John Deere 8420 Specifications

General Specifications
Model John Deere 8420
Length 5,380 mm (211.8 in)
Width
Height (cab) 3,100 mm (122 in)
Wheel base 3,020 mm (118.9 in)
ILS: 2,980 mm (117.3 in)
Weight (operating) 480/80R46 duals: 10,785 kg (23,777 lbs)
Fuel tank capacity 605.6 liters (160 US gal.; 133.2 Imp. gal)
Battery Two 12V, CCA 925A
Cabin type Cab (standard)
Engine
Engine model John Deere
Engine type Four-stroke, liquid-cooled, inline
Cylinders 6
Fuel type Diesel
Displacement 8.1 L, 8,128 cm2, (496.0 cu·in)
Bore and stroke 116.0 mm X 129.0 mm (4.57 in X 5.08 in)
Compression ratio 16.5:1
Horsepower 273.8 PS (201.3 kW; 270.0 HP) at 2,200 rpm
Starter Electric
Oil capacity: 27.0 L (28.5 US. qt, 23.8 Imp. qt.)
Coolant capacity: 34.0 L (35.9 US. qt, 29.9 Imp. qt.)
Transmission and chassis
Chassis 4×4 MFWD 4WD
Steering type Hydrostatic power
Brakes Hydraulic wet disc
Transmission model John Deere PowerShift
Transmission type Full power shift with hydraulic wet disc clutch
Gears 16 forward and 4 reverse
Speed Forward: 39.9 kmh (24.8 mph) Reverse: 10.9 kmh (6.8 mph)
Transmission oil capacity 140.1 L (37.0 US. gal, 30.8 Imp. gal.)
ILS: 149.9 L (39.6 US. gal, 33.0 Imp. gal.)
Tires
Front tires Ag: 16.9R30
Rear tires Ag: 18.4R46

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Three-Point Hitch
Category III/IIIN
Control type
Lift capacity (at ends) 6,885 kg (15,180 lbs)
7,845 kg (17,300 lbs)
Front Hitch
Category IIIN
Lift capacity (at ends) 4,990 kg (11,000 lbs)
PTO (Power take-off shaft)
Rear PTO type Independent with hydraulic wet discs clutch
Rear PTO speed 1000, 540/1000 rpm
Hydraulic system
Hydraulic type Closed center pressure-flow compensated (PFC)
Pressure 2900 psi (199.9 bar)
Valves 4 to 5
SCV flow 30.0 gpm (113.6 lpm)
Total flow 42.5 gpm (160.9 lpm)
33.5 gpm (126.8 lpm)