The John Deere 4520 is a 2WD/4WD row-crop tractor from the New Generation series. This tractor was manufactured by John Deere in Waterloo, Iowa, USA from 1969 to 1970. The JD 4520 is equipped with a 6.6 L six-cylinder turbocharged diesel engine and one of two transmissions: partially synchronized transmission with dry disc clutch and 8 forward and 2 reverse gears or full power shift transmission with wet disc clutch and 8 forward and 4 reverse gears.
The John Deere 4520 row-crop tractor used the John Deere diesel engine. It is a 6.6 L, 6,620 cm2, (404.0 cu·in) six-cylinder turbocharged diesel engine with 108.0 mm (4.25 in) of the cylinder bore and 121.0 mm (4.76 in) of the piston stroke. This engine produced 134.9 PS (99.2 kW; 133.0 HP) of maximum output power.
The John Deere 4520 is equipped with power steering, differential hydraulic wet disc brakes, open operator station (Roll-Gard ROPS or Cab with the heater was available as an option) and 189.3 liters (50 US gal.; 41.6 Imp. gal) fuel tank. The JD 4520 could be equipped with the John Deere 158 loader.
John Deere 4520 Specifications
| General Specifications | |
| Model | John Deere 4520 |
| Length | 4,330 mm (170.5 in) |
| Width | 2,430 mm (95.7 in) |
| Height | 2,690 mm (105.9 in) |
| Wheel base | 2,700 mm (106.3 in) |
| Weight | 6,805 kg (15,002 lbs) |
| Fuel tank capacity | 189.3 liters (50 US gal.; 41.6 Imp. gal) |
| Battery | Two 6V, 172Ah |
| Cabin type | Open operator station. Roll-Gard ROPS or Cab with heater (optional) |
| Engine | |
| Engine model | John Deere |
| Engine type | Four-stroke, liquid-cooled, inline |
| Cylinders | 6 |
| Fuel type | Diesel |
| Displacement | 6.6 L, 6,620 cm2, (404.0 cu·in) |
| Bore and stroke | 108.0 mm X 121.0 mm (4.25 in X 4.76 in) |
| Compression ratio | 16.4:1 |
| Horsepower | 134.9 PS (99.2 kW; 133.0 HP) |
| Starter | Electric |
| Oil capacity: | 13.2 L (13.9 US. qt, 11.6 Imp. qt.) |
| Coolant capacity: | 26.5 L (28 US. qt, 23.3 Imp. qt.) |
| Transmission and chassis | |
| Chassis | 4×2 2WD or 4×4 MFWD 4WD |
| Steering type | Power |
| Brakes | Differential hydraulic wet disc |
| Differential lock | Hydraulic rear |
| Transmission model | John Deere Syncro-Range |
| Transmission type | Partially synchronized with dry disc clutch |
| Gears | 8 forward and 2 reverse |
| Speed | Forward: 33.5 kmh (20.8 mph) Reverse: 10.3 (6.4 mph) |
| Transmission oil capacity | 68.1 L (18 US. gal, 15 Imp. gal.) |
| Transmission model | John Deere Power Shift |
| Transmission type | Full power shift with wet disc clutch |
| Gears | 8 forward and 4 reverse |
| Speed | Forward: 33.8 kmh (21 mph) Reverse: 10.1 (6.3 mph) |
| Transmission oil capacity | 60.6 L (16 US. gal, 13.3 Imp. gal.) |
| Tires | |
| Front tires | Ag: 10.00-16 |
| Rear tires | Ag: 20.8-38 |
| Three-Point Hitch | |
| Caterogy | III/II |
| Control type | – |
| Lift capacity (at ends) | – |
| PTO (Power take-off shaft) | |
| Rear PTO type | Independent |
| Rear PTO speed | 1,000 rpm |
| Hydraulic system | |
| Hydraulic type | Closed center |
| Pressure | 2250 psi (155.1 bar) |
| Valves | 1 to 3 |