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JOHN DEERE 8020 SERIES



JOHN DEERE WHEEL TRACTORS



John Deere 8420



Technical Data and Photos




Model: 8420

Manufacturer: John Deere

Factory: Waterloo, Iowa, USA.

Years of production: 2002 - 2005

Type: Four-wheel drive tractor

Number of axles: 2

Layout: Front-engine, 4WD


ENGINE

Model: John Deere 6081H
Type: Vertical, in-line, four-stroke diesel engine.
Aspiration: turbocharged
Cooling: liquid-cooled
Cooling fan drive: viscous
Air system: Dry filter with safety element and vacuum motor aspirated Strato-Tube pre cleaner.
Fuel injection system: High Pressure Common Rail, electronic injectors with variable injection timing and duration.
Control: Electronic injection control and electronic governing.

Displacement: 8.1 L (496 cu in)
Number of cylinders: 6
Bore: 116 mm (4.56 in)
Stroke: 129 mm (5.06 in)

Rated speed: 2200 RPM
Operating speed: 1500-2200 RPM
Constant power range: 600 RPM
Torque reserve: 40%

Rated power (ECE-R24): 198 kW (270 HP)
Rated power (97/68/EC): 209 kW (284 HP)
Maximum power (ECE-R24): 220 kW (300 HP)
Maximum power (97/68/EC): 231 kW (314 HP)

Fuel consumption at best point: 197 g/kWh


FLUID CAPACITIES

Cooling system: 34 L (35.9 US qts)
Engine oil: 27 L (28.5 US qts)
Transmission, final drive and hydraulic oil: 140 L (37 US gal)
Front axle oil (differential and final drives): 10.4 L (11 US qts)
Fuel tank: 606 L (160 US gal)


TRANSMISSIONS

Automatic Powershift:
16 Forward and 5 reverse full power shift speeds with fully automatic shifting and Field Cruise control.

Automatic Shifting Modes:
Automatic Draft, Transport and PTO. Shifting in relation to throttle reduction for transport and headland turns.

Control:
Shift under load – Automatic, Manual, Skip-Shift or sequential shift, shuttle reversing.

Inching Pedal/Clutch:
Foot operated wet disc clutch for inching.


SPEED RANGES

Number of field working speeds: 8

Speed range - forwards: 2 – 42 km/h
Speed range - reverse: 1.8 – 17 km/h


HYDRAULIC SYSTEM

Type: PFC System (pressure and flow compensating), load sensing with dedicated system pump.
Maximum pressure: 200 bar (2900 psi)
Maximum flow: 126 L/min (33.5 gpm) or optional 160 L/min (42.5 gpm)
Electro-Hydraulic Selective control valves:
Neutral, raise, lower and float. Adjustable flow with temperature compensation. Selectable detents. Load check valves and release assistors.
Maximum SCV’s: 5


POWER TAKE-OFF (PTO)

Independent oil cooled multiple disc, electro-hydraulically engaged and braked.
1000 RPM, 20 spline 45 mm shaft or 2 speed dry change 1000 RPM and 540 RPM with 45 and 35 mm shafts.

Engine speed at standard PTO speeds:
1000 RPM at 2180 engine RPM
540 RPM at 1980 engine RPM


3-POINT HITCH – REAR

Category 3N/3 with hook type draft link ends.
Electro-hydraulic with full electronic lower link draft sensing. Hitch dampening. External control switches.

Maximum lift capacity: 9700 kg (95.2 kN)
OECD lift capacity at 610 mm: 9,218 kg (90.4 kN)


3-POINT HITCH – FRONT - OPTIONAL

Category 3N with hook type draft link ends.
Electro-hydraulic, CommandARM control with full electronic integration with Implement Management System, External control switch.

Maximum lift capacity: 5,200 kg (51.0 kN)


STEERING

Hydrostatic power steering with ground drive back-up system.


BRAKES

Power brakes with oil cooled disc, hydraulically actuated and self equalising. Transmission Park lock and secondary hand brake.


INDEPENDENT LINK SUSPENSION (ILS) 4WD
Option

John Deere Independent upper and lower arms with integrated centre and outer final drives. Electro-hydraulic integrated management.

Hydro-pneumatic, permanent active, automatic levelling, automatic load compensation and draft active geometary for three point hitch implements.

Suspension range and cylinders:
± 125 mm at each wheel, 2 double acting hydraulic cylinders with suspension and rebound damping.

Performance features:
Electro-hydraulic differential lock, dual wheel capable, integrated transmission lubrication oil and integral high capacity balanced steering cylinder


CAB

CommandView cab with ComfortCommand seat or Active Seat and CommandARM.
Implement Management System, Automatic PowerShift, Hitch Slip Command.
Corner Post, dashboard mini-pod, vehicle monitor, Hydraulic TouchSet panel, optional deluxe performance monitor.
Air Conditioning or optional Automatic Temperature Control.


DIMENSIONS
With tyre size 600/70 R30 and 710/70 R42

Width: 2.54 m (100 in)
Height: 3.20 m (126 in)
Length: 5.85 m (230 in)

Wheelbase: 3.02 m (118.9 in)
Wheelbase (ILS): 2.98 m (117.7 in)


WEIGHT

Minimum shipping weight: 9 100 kg (20,062 lbs)

Operating weight: 10 786 kg (23,780 lbs) (with tyres 480/80R46 duals)

Maximum permissible weight for road: 14 000 kg (30,685 lbs)


John Deere agricultural tractors 8420, 8120, 7820...
John Deere agricultural tractors 8420, 8120, 7820 and … in Missouri, USA.
Taken on: 18 November 2005
Size of the photo: 1600 × 1200 pixels, 1.08 MB
Author of the photo: Aschuff
License: (CC BY-SA 3.0)


John Deere 8420 tractor
John Deere 8420 tractor.
Taken on: 20 April 2008
Size of the photo: 3899 x 2617, 3.84 MB
Author of the photo: Dre Dark
License: (CC BY-ND 2.0)





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