Technical specification of agricultural tractor John Deere 6520/6620/6820/6920 :
| Model | John Deere 6520 | John Deere 6620 | John Deere 6820 | John Deere 6920 |
| Years of production | – | – | – | – |
| Engine model / type | 6068 | 6068T | 6068T | 6068T |
| Number of cylinders / turbocharging | 6 | 6TI | 6TI | 6TI |
| Engine displacement (cm3) | 6786 | 6786 | 6786 | 6786 |
| Piston dimension / stroke (mm) | 106,5×127 | 106,5×110 | 106,5×127 | 106,5×127 |
| Maximum engine power (hp) / rpm | 115/2050 | 132/2050 | 141/1850 | 158/1850 |
| Torque (Nm) / rpm | 450/1495 | 543/1495 | 602/1365 | 669/1365 |
| Number of gears (front + rear) | 24+24 | 24+24 | 20+20 | 20+20 |
| Number of synchronized gears (front+rear) | 24+24 | 24+24 | 20+20 | 20+20 |
| Speed-Shift | 4 | 4 | 4 | 4 |
| Type of reverse | hydr | hydr | hydr | hydr |
| Driving speed (km/h) | 1,4-40,0 | 1,4-40,0 | 2,5-40,0 | 2,5-40,0 |
| Max Driving speed (km/h) | 40/50 | 40/50 | 40/50 | 40/50 |
| Hydraulic pump capacity (L/min) | 96 | 96 | 96 | 96 |
| 3-Point Hitch control | ehr | ehr | ehr | ehr |
| 3-point hitch max load (kg) | 6620 | 7420 | 8400 | 8400 |
| PTO speed (rpm) | 540/1000 | 540/1000 | 540/1000 | 540/1000 |
| Disc brake type (dry / wet) | – | – | – | – |
| Type of control of the braking system | hydr | hydr | hydr | hydr |
| Turning radius 2WD (m) | – | – | – | – |
| Turning radius 4WD (m) | 10,24 | 10,24 | 10,24 | 10,24 |
| Front wheel 2WD | – | – | – | – |
| Front wheel 4WD | 16,9R24 | 14,9R28 | 16,9R28 | 16,9R28 |
| Rear wheel 2WD | – | – | – | – |
| Rear wheel 4WD | 18,4R38 | 18,4R38 | 20,8R38 | 20,8R38 |
| 2WD total weight (kg) | – | – | – | – |
| 4WD total weight (kg) | 5080 | 5230 | 5580 | 5880 |
| Total height with cabin (cm) | 285 | 285 | 291 | 291 |
| Total length (cm) | 453 | 453 | 456 | 456 |
| Total width (cm) | 265 | 265 | 265 | 265 |
| Fuel tank capacity (l) | 207 | 207 | 250 | 250 |
| Cabin sound level (dB) | 72 | 72 | 72 | 72 |
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John Deere is a major American manufacturer of agricultural machinery. The first machine produced in 1836 was a plow that made tillage easier. In 1868, the company was incorporated as Deere & Company and in 1958 as John Deere-Delaware Company. John Deere machines are considered reliable, and as a result, are extremely popular.
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