John Deere

8420

Farm tractor · 2002–2005 · 284 hp

John Deere8420
EngineTransmissionHydraulicsDimensionsWeightTires & TracksFuelSteeringCabMore John Deere

The John Deere 8420 is a farm tractor manufactured from 2002 to 2005. It features a John Deere engine, and hydrostatic power steering. The transmission is a full power shift type with 16 forward and 4 reverse.

Engine

EngineJohn Deere
Fuel Typediesel
Cylinders6
Coolingliquid-cooled inline
Turbocharger Statusturbocharged diesel
Displacement496 ci (8.1 L)
Bore4.56 in (116 mm)
Stroke5.06 in (129 mm)
Compression Ratio16.5
Power Gross284 hp (211.8 kW)
Power Net270 hp (201.3 kW)
Power PTO269.41 hp (200.9 kW)
Power Drawbar207.49 hp (154.7 kW)
Air Cleanerdry with secondary element
Fuel Systemelectronic high-pressure common rail (HPCR)
Starter Volts12
Oil Capacity28.5 qts (27 L)
Coolant Capacity35.9 qts (34 L)
ManufacturerJohn Deere
Rated2,200 RPM
Idle900-2300 RPM
EmissionsTier II
Oil Change Interval Hours250

Transmission

Transmission Typefull power shift
Transmission ModelPowerShift
Gears16 forward and 4 reverse
Transmission DescriptionFull 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.
Clutchhydraulic wet disc
Oil Capacity148 qts (140.1 L)
Available Options16-speed full power shift

Hydraulics

Typeclosed center pressure-flow compensated (PFC)
Pressure2,900 psi (200 bar)
Valves4
Total Flow33.5 gpm (126.8 lpm)
Scv Flow30 gpm (113.6 lpm)
System Capacity37 gal (140 L)

Dimensions

Length211.9 in (538 cm)
Height Cab122.2 in (310 cm)
Wheelbase117.7 in (298 cm)
Front Tread60 in (152 cm)

Weight

Shipping23,050 lbs (10,455 kg)
Operating23,780 lbs (10,786 kg)

Tires & Tracks

Front Ag16.9R30
Rear Ag18.4R46

Fuel

Capacity160 gal (605.6 L)

Steering

Typehydrostatic power

Cab

Cabstandard