The John Deere 7820 is a 4WD row-crop tractor from the 7020 series. This tractor was manufactured by John Deere in Waterloo, Iowa, USA from 2003 to 2006. The John Deere 7820 is equipped with a 6.8 L (414.0 cu·in) six-cylinder diesel engine and one of three transmission variants.
The JD 7820 row-crop tractor used the John Deere engine. It is a 6.8 L, 6,784 cm2, (414.0 cu·in) six-cylinder turbocharged intercooled diesel engine with 106.0 mm (4.17 in) of the cylinder bore and 127.0 mm (5 in) of the piston stroke. The compression ratio rating is 17.0:1. This engine produced 205.9 PS (151.4 kW; 203 HP) of maximum output power and 903.1 N·m (92.1 kg·m, 665.6 ft·lb) at 1,400 rpm of torque.
The John Deere 7820 is equipped with hydrostatic power steering, hydraulic wet disc brakes, cab (standard), and 391.7 liters (103.5 US gal.; 86.2 Imp. gal) fuel tank.
John Deere 7820 Specifications
| General Specifications | |
| Model | John Deere 7820 |
| Length | 5,380 mm (211.8 in) |
| Width | 2,430 mm (95.7 in) |
| Height | 3,180 mm (125.2 in) |
| Wheel base | 2,860 mm (112.6 in) |
| Ground clearance (front axle) | 560 mm (22.0 in) |
| Weight (operating) | 4WD AutoQuad: 7,815 kg (17,229 lbs) |
| Fuel tank capacity | 391.7 liters (103.5 US gal.; 86.2 Imp. gal) With right step: 358.4 liters (94.7 US gal.; 78.8 Imp. gal) |
| Battery | Two 12V, CCA 925A |
| Cabin type | Cab (standard) |
| Engine | |
| Engine model | John Deere |
| Engine type | Four-stroke, liquid-cooled, inline |
| Cylinders | 6 |
| Fuel type | Diesel |
| Displacement | 6.8 L, 6,784 cm2, (414.0 cu·in) |
| Bore and stroke | 106.0 mm X 127.0 mm (4.17 in X 5 in) |
| Compression ratio | 17.0:1 |
| Horsepower | 205.9 PS (151.4 kW; 203.0 HP) |
| Torque | 903.1 N·m (92.1 kg·m, 665.6 ft·lb) at 1,400 rpm |
| Starter | Electric |
| Oil capacity: | 26.0 L (27.5 US. qt, 22.9 Imp. qt.) |
| Coolant capacity: | 29.4 L (31.1 US. qt, 25.9 Imp. qt.) |
| Transmission and chassis | |
| Chassis | 4×4 MFWD 4WD |
| Steering type | Hydrostatic power |
| Brakes | Hydraulic wet disc |
| Transmission model | PowrQuad Plus |
| Transmission type | – |
| Gears | 20 forward and 20 reverse |
| Transmission model | AutoQuad Plus |
| Transmission type | – |
| Gears | 20 forward and 20 reverse |
| Transmission model | AutoPowr IVT |
| Transmission type | Infinitely variable transmission |
| Gears | Infinite forward and reverse |
| Tires | |
| Front tires | Ag: 11.00-16 |
| Rear tires | Ag: 480/80R42 |
| Three-Point Hitch | |
| Category | III/IIIN |
| Control type | – |
| Lift capacity (at ends) | 4,560 kg (10,050 lbs) Optional: 6,350 kg (14,000 lbs) |
| PTO (Power take-off shaft) | |
| Front PTO type | Independent (optional) |
| Front PTO speed | 540/1000 rpm |
| Rear PTO type | Independent with hydraulic wet disc clutch |
| Rear PTO speed | 540/1000 rpm |
| Hydraulic system | |
| Hydraulic type | – |
| Hydraulic capacity | 107.9 L (28.5 US. gal, 23.7 Imp. gal.) |
| Pressure | 3046 psi (210 bar) |
| Valves | 7 |
| Pump flow | 32.0 gpm (121.1 lpm) |
| SCV flow | 30.0 gpm (113.6 lpm) |
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