Technical specifications of the agricultural tractor John Deere 4020/4520/4620/5020:
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| Model | John Deere 4020 | John Deere 4520 | John Deere 4620 | John Deere 5020 |
| Years of production | 65-72 | 68-72 | 71-72 | 66-72 |
| Engine model / type | – | – | – | – |
| Number of cylinders / turbocharging | 6 | 6T | 6TI | 6 |
| Engine displacement (cm3) | 6637 | 6637 | 6637 | 8698 |
| Piston dimension / stroke (mm) | 108×120 | 108×120 | 108×120 | 120×127 |
| Maximum engine power (hp) / rpm | 100/2500 | 120/2200 | 135/2200 | 136/2500 |
| Torque (Nm) / rpm | 353/1100 | – | – | – |
| Number of gears (front + rear) | 8+2/8+4 | 8+4 | 8+2/8+4 | 8+2 |
| Number of synchronized gears (front+rear) | 8+2/8+4 | 8+4 | 8+2/8+4 | 8+2 |
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| Speed-Shift | powershift | powershift | powershift | – |
| Type of reverse | – | – | – | – |
| Driving speed (km/h) | 3,3-31,0 | 3,3-34,3 | 2,8-29,7 | 2,1-32,7 |
| Max Driving speed (km/h) | 32,2 | 33,8 | – | – |
| Hydraulic pump capacity (L/min) | 76 | – | – | – |
| 3-Point Hitch control | mech | mech | mech | mech |
| 3-point hitch max load (kg) | 2700 | – | – | – |
| PTO speed (rpm) | 540/1000 | 540/1000 | 1000 | 1000 |
| Disc brake type (dry / wet) | – | – | – | – |
| Type of control of the braking system | hydr | hydr | hydr | hydr |
| Turning radius 2WD (m) | 7,78 | 7,67 | 9,18 | – |
| Turning radius 4WD (m) | – | – | – | – |
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| Front wheel 2WD | 7,50-18 | 9,50-20 | 11,00-16 | 11,00-16 |
| Front wheel 4WD | – | – | – | – |
| Rear wheel 2WD | 18,4-34 | 18,4-38 | 18,4-38 | 24,5-32 |
| Rear wheel 4WD | – | – | – | – |
| 2WD total weight (kg) | 4600 | 5572 | 5900 | 7761 |
| 4WD total weight (kg) | – | – | – | – |
| Total height with cabin (cm) | 199 | 269 | 269 | 246 |
| Total length (cm) | 381 | 434 | 434 | 438 |
| Total width (cm) | 248 | 270 | 270 | 264 |
| Fuel tank capacity (l) | 128 | 189 | 189 | 257 |
| Cabin sound level (dB) | 93 | – | – | – |
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