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    John Deere 8420

    John Deere 8420 tractor photo
    2002 - 2005   8020 Series
    Row-Crop tractor
    Previous model:John Deere 8410
    Next model:John Deere 8430
    Series next:John Deere 8520
    Series back:John Deere 8320



    Manufacturer:John Deere
    Factory:Waterloo, Iowa, USA


    8420:wheeled tractor

    John Deere 8420 Engine:

       John Deere 8.1L 6-cyl diesel
    full engine details ...


    Fuel:160 gal [605.6 L]
    Hydraulic system:37 gal [140.0 L]
    ILS Hydraulic system:39.6 gal [149.9 L]
    Front hubs:3.6 qts [3.4 L]
    ILS Front hubs:4.2 qts [4.0 L]
    Front diff.:14.2 qts [13.4 L]

    3-Point Hitch:

    Rear Type:III/IIIN
    Rear lift:15180 lbs [6885 kg]
     17300 lbs [7847 kg] *Optional
    Front Hitch:IIIN*Optional
    Front lift:11000 lbs [4989 kg]

    Power Take-off (PTO):

    Rear PTO:independent
    Clutch:hydraulic wet discs
    Rear RPM:1000 (1.75)
     540/1000 (1.375 optional)
    Engine RPM:540@1975

    Dimensions & Tires:

    Wheelbase:118.9 inches [302 cm]
     117.7 inches [298 cm] (ILS)
    Weight:21650 to 23780 pounds
    Front tire:16.9R30
    Rear tire:18.4R46
    full dimensions and tires ...

    8420 Serial Numbers:

    Location:Serial number plate on rear of tractor.
    2002: 1001
    2003: 10001
    2004: 20001
    2005: 30001

    how to read serial numbers...


    John Deere 8420 Power:

    Engine (gross):284 hp [211.8 kW]
    Engine (net):270 hp [201.3 kW]
    Engine (max):314 hp [234.1 kW]
    PTO (claimed):235 hp [175.2 kW]
    Drawbar (tested):207.49 hp [154.7 kW]
    PTO (tested):269.41 hp [200.9 kW]
    power test details ...


    Chassis:4x4 MFWD 4WD
    Steering:hydrostatic power
    Brakes:hydraulic wet disc
    Trailer brakes:hydraulic*Optional
    Cab:Cab standard.


    Type:closed center pressure-flow compensated (PFC)
    Capacity:37 gal [140.0 L]
    ILS Capacity:39.6 gal [149.9 L]
    Pressure:2900 psi [200.0 bar]
    Valves:4 to 5
    SCV flow:30 gpm [113.6 lpm]
    Total flow:33.5 gpm [126.8 lpm] *With standard 45cc pump
     42.5 gpm [160.9 lpm] *Optional 57cc pump


    Charging system:alternator
    Charging amps:150


    Cold-cranking amps:925

    Page information:

    Last update:May 27, 2015
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