| John Deere 8420 | VS | All other Farm Tractors |
| Production | |||||
|---|---|---|---|---|---|
| Model Year | 2002 | ||||
| Production Manufacturer | John Deere | vs | 15.9% Farm Tractors have John Deere |
||
| Factory | Waterloo, Iowa, Usa | ||||
| Capacity | |||||
|---|---|---|---|---|---|
| Capacity Fuel |
160 gal (89.65 gal higher than average)
|
vs |
70.35 gal
|
||
| Hydraulic system |
37 gal (17.58 gal higher than average)
|
vs |
19.42 gal
|
||
| Front diff. |
14.2 qts (6.6 qts higher than average)
|
vs |
7.60 qts
|
||
| Front hubs |
3.6 qts (2.16 qts higher than average)
|
vs |
1.44 qts
|
||
| Power Take-off (PTO) | |||||
|---|---|---|---|---|---|
| Power Take-off (PTO) Clutch | Hydraulic Wet Discs | vs | 4.4% Farm Tractors have hydraulic wet discs |
||
| Rear RPMs |
1000 (391.75 higher than average)
|
vs |
608.25
|
||
| Rear PTO | Independent | vs | 78.6% Farm Tractors have independent |
||
| Engine RPMs | 540@19751000@2200 | vs | 2.2% Farm Tractors have 540@19751000@2200 |
||
| Mechanical | |||||
|---|---|---|---|---|---|
| Mechanical Steering | Hydrostatic Power | vs | 81.1% Farm Tractors have hydrostatic power |
||
| Chassis | 4x4 Mfwd 4wd | vs | 52.8% Farm Tractors have 4x4 MFWD 4WD |
||
| Brakes | Hydraulic Wet Disc | vs | 24.3% Farm Tractors have hydraulic wet disc |
||
| Cab | Cab Standard. | ||||
| Transmission | |||||
|---|---|---|---|---|---|
| Transmission Clutch | Hydraulic Wet Disc | ||||
| Transmission Type | Full Power Shift | vs | 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 (89.22 qts higher than average)
|
vs |
58.78 qts
|
||
| Transmission Transmission | John Deere Powershift | ||||
| Transmission Gears |
16 forward (0.87 forward higher than average)
|
vs |
15.13 forward
|
||
| Transmission Speeds | With 18.4r46 Rear Tires. | ||||
| Dimensions | |||||
|---|---|---|---|---|---|
| Wheelbase |
118.9 inches (24.57 inches higher than average)
|
vs |
94.33 inches
|
||
| Weight (operating) | 23, 780 Lbs [10786 Kg] (480/80r46 Duals) | ||||
| Length |
211.9 inches (49.94 inches higher than average)
|
vs |
161.96 inches
|
||
| Height (cab) |
122.2 inches (12.66 inches higher than average)
|
vs |
109.54 inches
|
||
| Drawbar capacity | 3, 900 Lbs [1769 Kg] (cat 3 Extended) | ||||
| Hydraulics | |||||
|---|---|---|---|---|---|
| Hydraulics Type | Closed Center Pressure-flow Compensated (pfc) | ||||
| Hydraulics Valves |
5 (2.36 higher than average)
|
vs |
2.64
|
||
| Pressure |
2900 psi (2898 psi higher than average)
|
vs |
2,737 psi
|
||
| SCV flow |
30 gpm (0.73 gpm higher than average)
|
vs |
29.27 gpm
|
||
| Capacity (cu. ft.) |
37 gal (17.58 gal higher than average)
|
vs |
19.42 gal
|
||
| Total flow |
33.5 gpm (8.85 gpm higher than average)
|
vs |
24.65 gpm
|
||
| 3-Point Hitch | |||||
|---|---|---|---|---|---|
| Rear Type |
III IIIN (36.36 lower than average)
|
vs | 0.9% Farm Tractors have III IIIN |
||
| Rear lift |
15180 lbs (15169 lbs higher than average)
|
vs |
11,787 lbs
|
||
| Front Hitch | Optional | ||||
| Front lift |
11000 lbs (10993 lbs higher than average)
|
vs |
7,658 lbs
|
||
| Power | |||||
|---|---|---|---|---|---|
| PTO (claimed) |
235 hp (122.32 hp higher than average)
|
vs |
112.68 hp
|
||
| PTO (tested) |
269.41 hp (92.16 hp higher than average)
|
vs |
177.25 hp
|
||
| Drawbar (tested) |
207.49 hp (43.54 hp higher than average)
|
vs |
163.95 hp
|
||
| Electrical | |||||
|---|---|---|---|---|---|
| Ground | Negative | ||||
| Charging system | Alternator | ||||
| Charging amps |
150 (38.88 higher than average)
|
vs |
111.12
|
||
| Tires | |||||
|---|---|---|---|---|---|
| Ag front |
16.9R30 (7.2 lower than average)
|
vs | 2.5% Farm Tractors have 16.9R30 |
||
| Ag rear |
18.4R46 (6.39 lower than average)
|
vs | 1.3% Farm Tractors have 18.4R46 |
||
| Battery | |||||
|---|---|---|---|---|---|
| Volts |
12 (equals average)
|
vs |
12.00
|
||
| Number |
2 (0.35 higher than average)
|
vs |
1.65
|
||
| Cold-cranking amps |
925 (86.48 higher than average)
|
vs |
838.52
|
||
| Variants | |||||
|---|---|---|---|---|---|
| 8420 | Wheeled Tractor | ||||
| 8420T | Crawler | ||||