The John Deere 8640 is a four-wheel drive tractor from the Iron Horses series. This tractor was manufactured by John Deere in Waterloo, Iowa, USA from 1979 to 1982. The John Deere 8640 is equipped with a 10.1 L (618.8 cu·in) six-cylinder diesel engine and a partial power shift transmission with 16 forward and 6 reverse gears and hydraulic wet disc clutch.
The JD 8640 four-wheel drive used the John Deere engine. It is a 10.1 L, 10,140 cm2, (618.8 cu·in) six-cylinder turbocharged diesel engine with 130.0 mm (5.12 in) of the cylinder bore and 127.0 mm (5 in) of the piston stroke. The compression ratio rating is 15.2:1. This engine produced 278.9 PS (205.1 kW; 275.0 HP) at 2,100 rpm of output power.
The John Deere 8640 is equipped with articulated power steering, hydraulic wet disc brakes, Cab (standard), and 810.0 liters (214 US gal.; 178.2 Imp. gal) fuel tank.
John Deere 8640 Specifications
| General Specifications | |
| Model | John Deere 8640 |
| Length | 5,670 mm (223.2 in) |
| Width | – |
| Height (cab) | 3,210 mm (126.4 in) |
| Wheel base | 3,170 mm (124.8 in) |
| Ground clearance | 460 mm (18.1 in) |
| Weight | 12,820 kg (28,263 lbs) |
| Fuel tank capacity | 810.0 liters (214 US gal.; 178.2 Imp. gal) |
| Battery | 12V |
| Cabin type | Cab (standard) |
| Engine | |
| Engine model | John Deere |
| Engine type | Four-stroke, liquid-cooled, inline |
| Cylinders | 6 |
| Fuel type | Diesel |
| Displacement | 10.1 L, 10,140 cm2, (618.8 cu·in) |
| Bore and stroke | 130.0 mm X 127.0 mm (5.12 in X 5 in) |
| Compression ratio | 15.2:1 |
| Horsepower | 278.9 PS (205.1 kW; 275.0 HP) at 2,100 rpm |
| Starter | Electric |
| Oil capacity: | 24.6 L (26 US. qt, 21.6 Imp. qt.) |
| Coolant capacity: | 45.4 L (48 US. qt, 39.9 Imp. qt.) |
| Transmission and chassis | |
| Chassis | 4×4 MFWD 4WD |
| Steering type | Articulated power |
| Brakes | Hydraulic wet disc |
| Differential lock | Hydraulic front and rear |
| Transmission model | John Deere Quad-Range |
| Transmission type | Partial power shift with hydraulic wet disc clutch |
| Gears | 16 forward and 6 reverse |
| Speed | Forward: 32.5 kmh (20.2 mph) Reverse: 21.7 kmh (13.5 mph) |
| Transmission oil capacity | 155.2 L (41 US. gal, 34.1 Imp. gal.) |
| Tires | |
| Front tires | Ag: 18.4-34 |
| Rear tires | Ag: 18.4-34 |
| Three-Point Hitch | |
| Category | III/IIIN |
| Control type | – |
| Lift capacity (at ends) | 3,875 kg (8,545 lbs) |
| PTO (Power take-off shaft) | |
| Rear PTO type | Independent |
| Rear PTO speed | 1000 rpm |
| Hydraulic system | |
| Hydraulic type | Closed center |
| Hydraulic capacity | 155.2 L (41 US. gal, 34.1 Imp. gal.) |
| Valves | 2 |
| Pump flow | 33.0 gpm (124.9 lpm) |
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