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| info | |
| 1976 - 1986, Utility tractor | |
| Series next: | John Deere 940 |
| Production | |
| Manufacturer: | John Deere |
| Factory: | Mannheim, Baden-WГјrttemberg, Germany |
| Capacity | |
| Fuel: | 20.6 gal [78.0 L] |
| Hydraulic system: | 10.8 gal [40.9 L] |
| 3-Point Hitch | |
| Rear Type: | II/I |
| Rear lift: | 4878 lbs [2212 kg] |
| Power Take-off (PTO) | |
| Rear PTO: | live, independent*Optional |
| Clutch: | dry disc, wet disc*Optional, independent PTO |
| Rear RPM: | 540 |
| Engine RPM: | 1000@2070 |
| Front PTO: | optional |
| Front RPM: | 1000 |
| Dimensions & Tires | |
| Wheelbase: | 74.4 inches [188 cm] |
| Weight: | 5004 lbs [2269 kg] |
| Front tire: | 6.50-16 |
| Rear tire: | 12.4-32 |
| 840 Serial Numbers | |
| - Serial numbers unknown - |
| John Deere 840 Power | |
| Engine: | 37.5 hp [28.0 kW] |
| PTO (claimed): | 33.5 hp [25.0 kW] |
| Mechanical | |
| Chassis: | 4x2 2WD |
| Final drives: | planetary |
| Steering: | manual |
| Brakes: | hydraulic wet disc |
| Cab: | Four-post ROPS. |
| Hydraulics | |
| Type: | closed center |
| Capacity: | 10.8 gal [40.9 L] |
| Pump flow: | 6.1 gpm [23.1 lpm] |
| Electrical | |
| Ground: | negative |
| Charging system: | alternator |
| Charging amps: | 33 |
| Battery | |
| Number: | 2 |
| Volts: | 12 |
| info | |
| Bore/Stroke: | 4.19x4.33 inches [106 x 110 mm] |
| Power: | 37.5 hp [28.0 kW] |
| Fuel system: | direct injection |
| Compression: | 16.8:1 |
| Rated RPM: | 2400 |
| Operating RPM: | 1300-2400 |
| Starter volts: | 12 |
| Starter power: | 4 hp [3.0 kW] |
| Oil capacity: | 7.4 qts [7.0 L] |
| Coolant capacity: | 11.1 qts [10.5 L] |
| Engine Detail | |
| John Deere, diesel, 3-cylinder, liquid-cooled, 179 ci [2.9 L] |
| info | |
| Series next: | John Deere 940 |
| Transmission | |
| Type: | collar shift |
| Gears: | 8 forward and 4 reverse |
| Clutch: | dry disc |
| info | |
| Series next: | John Deere 940 |
| Dimensions | |
| Weight (shipping): | 5004 lbs [2269 kg] |
| Wheelbase: | 74.4 inches [188 cm] |
| Length: | 138 inches [350 cm] |
| Width: | 65.4 inches [166 cm] |
| Height (ROPS): | 94.1 inches [239 cm] |
| Height (exhaust): | 103.1 inches [261 cm] |
| Clearance (front axle): | 21 inches [53 cm] |
| Front tread: | 49.6 to 79.5 inches [125 to 201 cm] |
| Rear tread: | 53.5 to 73.2 inches [135 to 185 cm] |
| John Deere 840 Tires | |
| Ag front: | 6.50-16 |
| Ag rear: | 12.4-32 |