John Deere 8420 VS David Brown 780 specs comparison
John Deere 8420
General Infos| Make | John Deere |
| Model | 8420 |
| Country | United states |
| Production | From 2002 Until 2005 |
| Price | - |
| Tractor type | Row Crop tractor |
| Fuel | diesel |
| Service repair manual | John Deere 8420 Manual |
Dimensions, sizes and tires
| AG front tires | 16.9R30 |
| AG rear tires | 18.4R46 |
| Lawn front tires | - |
| Lawn rear tires | - |
| Indus front tires | - |
| Indus rear tires | - |
| Weight | 21,650 lbs or 9820 kg |
| Length | 211.9 inches [538 cm] |
| Width | - |
| Height | 122.2 inches [310 cm] |
| Wheelbase | 118.9 inches [302 cm] |
| Ground clearance | - |
| Turning radius | - |
| Rear tread size | - |
| Front tread size | 60 to 80 inches |
| Turning radius | - |
Horsepower and engin specs
| Engine capacity | 496 ci or 8.1 L |
| Cylinders | 6 cylinders |
| Engine power | 314 hp or 234.1 kW |
| Engine RPM | 2200 (rpm) |
| Torque | - | Torque RPM | - |
| Fuel type | diesel |
| Fuel injection | electronic high-pressure common rail (HPCR) |
| Fuel tank size | 160 gal or 605.6 L |
| Oil capacity | 28.5 qts or 27.0 L |
| Oil change | 250 h |
| Starter motor | - |
| Starter volts | 12 V |
| Parts And Accessories | John Deere 8420 Parts |
| Batteries number | 2 |
| Batteries voltage | 12 V |
| Battries Amps | - |
| Cold Amps | 925 |
| Ground force | negative |
| Charging system | alternator |
| Charging Volts | - |
| Charging Amps | 150 amps |
| Trans system | John Deere PowerShift |
| Trans type | full power shift |
| Trans gears | 16 forward and 4 reverse |
| Clutch system | hydraulic wet disc |
| Wheel drive | 4x4 MFWD 4WD |
| Final drive | - |
| Steering | hydrostatic power |
| Braking system | hydraulic wet disc |
| Cabin type | Cab standard |
| Differentiel lock | - |
| System | closed center pressure-flow compensated |
| Valves | 4 to 5 |
| Pump flow | - |
| SVC flow | 30 gpm or 113.6 lpm |
| Steering flow | - |
| Tank capacity | 37 gal or 140.0 L |
| Hydraulic pressure | 2900 psi or 200.0 bar |
| Max flow | 33.5 gpm or 126.8 lpm |
| Drawbar type | - |
| Claimed power | - |
| Drawbar horsepower | 207.49 hp or 154.7 kW |
| Fuel consumption | 13.6 gal/hour or 51.5 l/hour |
| Pulling power | 29,964 lbs or 13591 kg |
| Claimed power | 235 hp or 175.2 kW |
| Real power | 235.45 hp or 175.6 kW |
| Engine @RPM | 540@1975 (rpm) |
| PTO Clutch | hydraulic wet discs |
| Rear PTO | independent |
| Rear PTO RPM | 1000 (rpm) |
| Front PTO | - |
| Front PTO RPM | - |
| Mid PTO | - |
| Mid PTO RPM | - |
| Fuel consumption | 13.7 gal/hour or 51.9 l/hour |
| Hitch system | - |
| Rear hitch | III/IIIN |
| Rear hitch lift | 15180 lbs or 6885 kg |
| Front hitch | IIIN |
| Front hitch lift | 11000 lbs or 4989 kg |
David Brown 780
General Infos| Make | David Brown |
| Model | 780 |
| Country | United states |
| Production | From 1967 Until 1971 |
| Price | - |
| Tractor type | - |
| Fuel | diesel |
| Service repair manual | David Brown 780 Manual |
Dimensions, sizes and tires
| AG front tires | 6.00-16 |
| AG rear tires | 12.4/11-28 |
| Lawn front tires | - |
| Lawn rear tires | - |
| Indus front tires | - |
| Indus rear tires | - |
| Weight | 3,470 lbs or 1573 kg |
| Length | 111.75 inches [283 cm] |
| Width | 64 inches [162 cm] |
| Height | 82.5 inches [209 cm] |
| Wheelbase | 75.8 inches [192 cm] |
| Ground clearance | 11.75 inches [29 cm] |
| Turning radius | - |
| Rear tread size | - |
| Front tread size | - |
| Turning radius | - |
Horsepower and engin specs
| Engine capacity | 164.4 ci or 2.7 L |
| Cylinders | 3 cylinders |
| Engine power | 46 hp or 34.3 kW |
| Engine RPM | 2200 (rpm) |
| Torque | - | Torque RPM | - |
| Fuel type | diesel |
| Fuel injection | - |
| Fuel tank size | 9.5 gal or 36.0 L |
| Oil capacity | 6.5 qts or 6.2 L |
| Oil change | - |
| Starter motor | - |
| Starter volts | - |
| Parts And Accessories | David Brown 780 Parts |
| Batteries number | - |
| Batteries voltage | - |
| Battries Amps | - |
| Cold Amps | - |
| Ground force | negative |
| Charging system | - |
| Charging Volts | - |
| Charging Amps | - |
| Trans system | sliding gear |
| Trans type | - |
| Trans gears | 6 forward and 2 reverse |
| Clutch system | dry disc |
| Wheel drive | 4x2 2WD |
| Final drive | - |
| Steering | manual |
| Braking system | mechanical drum |
| Cabin type | - |
| Differentiel lock | - |
| System | - |
| Valves | - |
| Pump flow | 7.4 gpm or 28.0 lpm |
| SVC flow | - |
| Steering flow | - |
| Tank capacity | - |
| Hydraulic pressure | 2000 psi or 137.9 bar |
| Max flow | - |
| Drawbar type | - |
| Claimed power | 38.9 hp or 29.0 kW |
| Drawbar horsepower | - |
| Fuel consumption | - |
| Pulling power | - |
| Claimed power | 42.9 hp or 32.0 kW |
| Real power | - |
| Engine @RPM | 540@1828 (rpm) |
| PTO Clutch | - |
| Rear PTO | live |
| Rear PTO RPM | 540 (rpm) |
| Front PTO | - |
| Front PTO RPM | - |
| Mid PTO | - |
| Mid PTO RPM | - |
| Fuel consumption | - |
| Hitch system | - |
| Rear hitch | I |
| Rear hitch lift | 1600 lbs or 725 kg |
| Front hitch | - |
| Front hitch lift | - |
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Useful links and guides ....
- John Deere provided us with the latest version of its 8420 service repair manual
- Find All mechanical and electrical parts and accessories of John Deere 8420 farm-tractor here
- Get your David Brown 780 manual book version
- Cabine, electrical And mechanical parts for David Brown 780 farm-tractor here
