John Deere 8640
Power
275 hp
Production
1979-1982
Engine
Turbocharged diesel, 6-cylinder
Transmission
John Deere Quad-Range
Weight
28,270 lbs [12823 kg]
Drive
4WD
From the same series:
Introduction
John Deere 8640 Four-Wheel Drive Tractor
The John Deere 8640 is a high-horsepower four-wheel drive tractor manufactured in Waterloo, Iowa, between 1979 and 1982. Designed for large-scale agricultural operations, this machine belongs to the 8000 series, positioned between the 8440 and the later 8650 models.
Engine and Performance
The tractor is powered by a 10.1-liter (619 ci) John Deere 6-cylinder turbocharged diesel engine. It generates a rated power of 275 hp at 2100 engine RPM. The engine features a liquid-cooled system, a compression ratio of 15.2:1, and a dual paper element air cleaner to maintain performance under heavy dust conditions.
Transmission and Drivetrain
The 8640 utilizes the John Deere Quad-Range transmission, providing 16 forward gears and 6 reverse gears. This system features partial power shift capability, allowing for shifting between gears 1-2 and 3-4 within a range without clutching. Changing between the four available ranges (A-D) requires the tractor to be at a complete stop.
Hydraulics and Hitch
The machine is equipped with a closed-center hydraulic system capable of a 33 gpm (124.9 lpm) pump flow and a total system capacity of 41 gallons (155.2 L). The rear hitch is a category III/IIIN type with a lift capacity of 8,545 lbs (3,876 kg). It also features an independent rear PTO operating at 1000 RPM at an engine speed of 2100 RPM.
Chassis and Dimensions
Built on an articulated frame, the tractor features power steering and hydraulic wet disc brakes. It has a wheelbase of 125 inches (317 cm) and an operating weight of 28,270 lbs (12,823 kg). The machine is configured with front and rear rack-and-pinion axles, with tread adjustments ranging from 63 to 130 inches.
Conclusion
The John Deere 8640 is a heavy-duty tractor engineered for high-draft agricultural applications. Its combination of an articulated 4WD chassis, significant ballast weight, and robust hydraulic system makes it suitable for demanding primary tillage and wide-width implement operation.
Production Information of John Deere, 8640
- Original price was $80,000 in 1982
- Four-wheel Drive (4WD) tractor
- Built in Waterloo, Iowa, USA
| Manufacturer | John Deere |
|---|
Dimension and Tires Information of John Deere, 8640
| Rack-and-pinion rear axle | 3.937 by 95.8 inches [99 by 2433 mm] |
|---|---|
| Wheelbase | 125 inches [317 cm] |
| Front axle | Rack-and-pinion: 3.937 by 95.8 inches [99 by 2433 mm] |
| Ground clearance | 18.4 inches [46 cm] |
| Length | 223.5 inches [567 cm] |
| Rack-and-pinion rear axle | 3.937 by 118.4 inches [99 by 3007 mm] |
| Front axle | Rack-and-pinion: 3.937 by 118.4 inches [99 by 3007 mm] |
| Operating weight | 28,270 lbs [12823 kg] |
| Rear tread | 63 to 130 inches [160 to 330 cm] |
| Front tread | 63 to 130 inches [160 to 330 cm] |
| Ag front | 18.4-34 |
|---|---|
| Ag rear | 18.4-34 |
Engine Specifications of John Deere, 8640
- John Deere
- Liquid-cooled
- Turbocharged diesel
- 6-cylinder
| Coolant capacity | 48 qts [45.4 L] |
|---|---|
| Air cleaner | Dual paper elements |
| Compression | 15.2:1 |
| Idle RPM | 800-2300 |
| Rated RPM | 2100 |
| Displacement | 619 ci [10.1 L] |
| Power | 275 hp [205.1 kW] |
| Bore/Stroke | 5.12x5.00 inches [130 x 127 mm] |
| Oil capacity | 26 qts [24.6 L] |
| Starter volts | 12 |
| Operating RPM | 1500-2100 |
Transmission Information of John Deere, 8640
Transmission variants 1
- Four gears (1-4) in four ranges (A-D). Tractor must be stopped to select range. Power shift between gears 1-2 and 3-4 within range.
| Transmission | John Deere Quad-Range |
|---|---|
| Oil capacity | 164 qts [155.2 L] |
| Clutch | Hydraulic wet disc |
| Type | Partial power shift |
| Gears | 16 forward and 6 reverse |
Mechanical Specs of John Deere, 8640
- Four-wheel drive
- Cab standard
- Hydraulic wet disc brakes
- Articulated power steering
| Differential lock | Hydraulic front and rear |
|---|
Power Information of John Deere, 8640
| Rear PTO | Independent |
|---|---|
| Rear PTO Type | 1000 |
| Engine RPM | 1000@2100 |
Hydraulics Specifications of John Deere, 8640
| Type | Closed center |
|---|---|
| Pump flow | 33 gpm [124.9 lpm] |
| Capacity | 41 gal [155.2 L] |
| Valves | 2 |
Three-Point Hitch of John Deere, 8640
| Rear Type | III/IIIN |
|---|---|
| Rear lift | 8545 lbs [3876 kg] |
Electrical System of John Deere, 8640
| Ground | Negative |
|---|---|
| Battery CCA | 975 |
| Batteries | 2 |
| Charging system | Alternator |
| Battery volts | 6 |
| Charging amps | 90 |
Where it sits
With 275 HP, the John Deere 8640 sits between 8440 (215 HP) and 8650 (290 HP) in John Deere's range. Its power puts it in the 94th percentile of 1970s models in our database (1259 machines).
Frequently asked questions
How much horsepower does the John Deere 8640 have?
The John Deere 8640 delivers 275 HP.
What years was the John Deere 8640 produced?
The John Deere 8640 was produced in 1979-1982.
What engine does the John Deere 8640 have?
The John Deere 8640 is powered by a Turbocharged diesel, 6-cylinder engine.
What transmission does the John Deere 8640 use?
The John Deere 8640 uses a John Deere Quad-Range transmission.
How much does the John Deere 8640 weigh?
The John Deere 8640 weighs 28,270 lbs [12823 kg].
Is the John Deere 8640 4WD?
The John Deere 8640 is available in 4WD.