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| info | |
| 1970 - 1975, Row-Crop tractor | |
| Series next: | John Deere 4420 |
| Series back: | John Deere 2420 |
| Production | |
| Manufacturer: | John Deere |
| Factory: | Rosario, Argentina |
| Capacity | |
| Fuel: | 34.1 gal [129.1 L] |
| 3-Point Hitch | |
| Rear Type: | II |
| Power Take-off (PTO) | |
| Rear PTO: | independent |
| Rear RPM: | 540 |
| Dimensions & Tires | |
| Wheelbase: | 100.4 inches [255 cm] |
| Weight: | 7668 lbs [3478 kg] |
| Front tire: | 6.00x16 |
| Rear tire: | 18.4x34 |
| 3420 Serial Numbers | |
| Location: | Serial number plate below the steering column. |
| - Serial numbers unknown - | |
| John Deere 3420 Power | |
| Engine: | 77 hp [57.4 kW] |
| Mechanical | |
| Chassis: | 4x2 2WD |
| Final drives: | planetary |
| Steering: | power |
| Brakes: | hydraulic wet disc |
| Cab: | Open operator station. |
| Hydraulics | |
| Type: | closed center |
| Electrical | |
| Charging system: | alternator |
| Charging amps: | 28 |
| Battery | |
| Number: | 2 |
| Volts: | 6 |
| info | |
| Bore/Stroke: | 4.016x4.331 inches [102 x 110 mm] |
| Power: | 77 hp [57.4 kW] |
| Air cleaner: | dry |
| Compression: | 16.7:1 |
| Rated RPM: | 2500 |
| Torque: | 221 lb-ft [299.7 Nm] |
| Torque RPM: | 1250 |
| Starter volts: | 12 |
| Engine Detail | |
| John Deere, diesel, 6-cylinder, liquid-cooled inline, 302.7 ci [5.0 L] |
| info | |
| Speeds: | With 18.4x34 rear tires. |
| Transmission | |
| Transmission: | Syncro-Range |
| Gears: | 8 forward and 2 reverse |
| info | |
| Series next: | John Deere 4420 |
| Series back: | John Deere 2420 |
| Dimensions | |
| Weight (shipping): | 7668 lbs [3478 kg] |
| Wheelbase: | 100.4 inches [255 cm] |
| Length: | 161 inches [408 cm] |
| Height (hood): | 67.3 inches [170 cm] |
| Height (exhaust): | 88.2 inches [224 cm] |
| Ground clearance: | 13.4 inches [34 cm] |
| John Deere 3420 Tires | |
| Ag front: | 7.50x18 |
| Ag rear: | 13.6x38, 15.5x38, 23.1x26 |