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John Deere 8420

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John Deere 8420
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John Deere 8420 VS
Farm Tractors
Production
Model Year 2002  
Production Manufacturer John Deere  15.9% Farm Tractors have John Deere
Factory Waterloo, Iowa, Usa 
Capacity
Capacity Fuel
160 gal
70.35 gal
Hydraulic system
37 gal
19.42 gal
Front diff.
14.2 qts
7.60 qts
Front hubs
3.6 qts
1.44 qts
Power Take-off (PTO)
Power Take-off (PTO) Clutch Hydraulic Wet Discs  4.4% Farm Tractors have hydraulic wet discs
Rear RPMs
1000 
608.25
Rear PTO Independent  78.6% Farm Tractors have independent
Engine RPMs 540@19751000@2200   2.2% Farm Tractors have 540@19751000@2200
Mechanical
Mechanical Steering Hydrostatic Power  81.1% Farm Tractors have hydrostatic power
Chassis 4x4 Mfwd 4wd  52.8% Farm Tractors have 4x4 MFWD 4WD
Brakes Hydraulic Wet Disc  24.3% Farm Tractors have hydraulic wet disc
Cab Cab Standard. 
Engine
Engine Fuel Diesel Electronic High-pressure Common Rail (hpcr)  0.4% Farm Tractors have diesel electronic high-pressure common rail (HPCR)
Engine Type John Deere Inline  1% Farm Tractors have John Deere inline
Engine Aspiration Turbocharged  36% Farm Tractors have turbocharged
Engine Cylinders
4.46
Engine Bore/Stroke 4.56x5.06 Inches [116 X 129 Mm] 
Engine Displacement
496 ci
306.10 ci
Engine Cooling Liquid  86% Farm Tractors have Liquid
Engine Compression 16.5:1  
Engine Rated RPMs
2200 
2,340
Engine Starter volts
12 
12.58
Engine Air cleaner Dry With Secondary Element 
Engine Oil capacity
28.5 qts
16.93 qts
Engine Coolant
35.9 qts
23.79 qts
Engine Oil change
250 h
371.08 h
Engine Idle RPMs 900-2300  
Engine Operating RPMs 1500-2200  
Transmission
Transmission Clutch Hydraulic Wet Disc 
Transmission Type Full Power Shift  15.4% Farm Tractors have full power shift
Transmission Comments Full 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. 
Transmission Oil capacity
148 qts
58.78 qts
Transmission Transmission John Deere Powershift 
Transmission Gears
16 forward
15.13 forward
Transmission Speeds With 18.4r46 Rear Tires. 
Dimensions
Wheelbase
118.9 inches
94.33 inches
Weight (operating) 23, 780 Lbs [10786 Kg] (480/80r46 Duals) 
Length
211.9 inches
161.96 inches
Height (cab)
122.2 inches
109.54 inches
Drawbar capacity 3, 900 Lbs [1769 Kg] (cat 3 Extended) 
Hydraulics
Hydraulics Type Closed Center Pressure-flow Compensated (pfc) 
Hydraulics Valves
2.64
Pressure
2900 psi
2,737 psi
SCV flow
30 gpm
29.27 gpm
Capacity (cu. ft.)
37 gal
19.42 gal
Total flow
33.5 gpm
24.65 gpm
3-Point Hitch
Rear Type
III IIIN 
0.9% Farm Tractors have III IIIN
Rear lift
15180 lbs
11,787 lbs
Front Hitch Optional 
Front lift
11000 lbs
7,658 lbs
Power
PTO (claimed)
235 hp
112.68 hp
PTO (tested)
269.41 hp
177.25 hp
Drawbar (tested)
207.49 hp
163.95 hp
Electrical
Ground Negative 
Charging system Alternator 
Charging amps
150 
111.12
Tires
Ag front
16.9R30 
2.5% Farm Tractors have 16.9R30
Ag rear
18.4R46 
1.3% Farm Tractors have 18.4R46
Battery
Volts
12 
12.00
Number
1.65
Cold-cranking amps
925 
838.52
Variants
8420 Wheeled Tractor 
8420T Crawler 

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