John Deere 8650
Power
290 hp
Production
1982-1988
Engine
Intercooled turbocharged diesel, 6-cylinder
Transmission
Quad-Range
Weight
30270 lbs [13730 kg]
Drive
4WD
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Introduction
John Deere 8650 Four-Wheel Drive Tractor
The John Deere 8650 is a high-horsepower four-wheel drive tractor produced between 1982 and 1988 in Waterloo, Iowa. As a central model of the 50-series, this machine was engineered to provide year-round operational efficiency, moving beyond traditional tillage tasks to include row-crop applications such as planting and cultivation.
Engine and Performance
The tractor is powered by a 6-cylinder, 10.1-liter (619 ci) intercooled turbocharged diesel engine. This liquid-cooled power plant generates 290 hp at a rated engine speed of 2100 RPM. The engine features a 15.2:1 compression ratio and is equipped with a dual-element paper air cleaner with an aspirator to maintain performance in dusty field environments.
Transmission and Drivetrain
The 8650 utilizes a Quad-Range partial power shift transmission, offering 16 forward and 6 reverse gears. The system features a Perma-Clutch hydraulic wet disc clutch. Operation requires the tractor to be fully stopped to select one of the four main ranges; however, within each range, clutchless power shifting is available between speeds 1-2 and 3-4. A synchronized shift is possible between the second and third speeds within a range.
Hydraulics and Hitch
The hydraulic system is a closed-center, constant-pressure design with a pump flow capacity of 32 gpm (121.1 lpm). It supports between two and four remote valves. For implement management, the tractor is equipped with a Category III/IIIN rear hitch featuring lower-link draft sensing, capable of providing 9,260 lbs (4,200 kg) of lift capacity.
Operator Environment and Mechanical Features
The machine is equipped with the Sound-Gard cab, which includes air conditioning as standard to support operator endurance during long working days. Steering is achieved through an articulated power system, and traction is enhanced by electro-hydraulic differential locks on both the front and rear axles. Stopping power is provided by hydraulic wet disc brakes.
Conclusion
With an operating weight of approximately 30,270 lbs and a 125-inch wheelbase, the John Deere 8650 is a heavy-duty platform suited for large-scale agricultural operations. Its versatility, supported by a full-power PTO and draft-control hitch, allows it to perform a wide spectrum of field tasks, from heavy tillage to precise row-crop work.
Production Information of John Deere, 8650
- The 8650 was the middle model of John Deere's 50-series four-wheel drive tractors that were first available in 1982. Efficiency was the advertising focus, noting that these tractors could be used throughout the season, not simply for tillage. The 8650 was able to plant and cultivate 30-inch rows, and perform a variety of field operations with its draft-control hitch and full-power PTO.
- Original price was $97,562 in 1983
- Four-wheel Drive (4WD) tractor
- Built in Waterloo, Iowa, USA
| Manufacturer | John Deere |
|---|
Dimension and Tires Information of John Deere, 8650
| Standard axle rear axle | 3.938 by 96 inches [100 by 2438 mm] |
|---|---|
| Wheelbase | 125 inches [317 cm] |
| Front axle | Standard axle: 3.938 by 96 inches [100 by 2438 mm] |
| Operating weight | 30270 lbs [13730 kg] |
| Length | 223.5 inches [567 cm] |
| Long axle rear axle | 3.937 by 118.6 inches [99 by 3012 mm] |
| Front axle | Long axle: 3.937 by 118.6 inches [99 by 3012 mm] |
| Shipping weight | 29320 lbs [13299 kg] |
| Rear tread | 66 to 129 inches [167 to 327 cm] |
| Front tread | 66 to 129 inches [167 to 327 cm] |
| Ag front | 18.4-38 |
|---|---|
| Ag front(optional) | 20.8-38 |
| Ag front(optional) | 23.1-34 |
| Ag front(optional) | 24.5R32 |
| Ag front(optional) | 23.1-34 |
| Ag front | 24.5-32 |
| Ag front(optional) | 24.5R32 |
| Ag rear | 24.5-32 |
| Ag rear(optional) | 30.5-32 |
| Ag rear | 18.4-38 |
| Ag rear(optional) | 20.8-34 |
| Ag rear(optional) | 20.8-38 |
| Ag rear(optional) | 30.5R32 |
| Ag rear(optional) | 20.8-34 |
| Ag rear(optional) | 30.5R32 |
| Ag rear(optional) | 30.5-32 |
Engine Specifications of John Deere, 8650
- John Deere
- Liquid-cooled
- Intercooled turbocharged diesel
- 6-cylinder
| Starter volts | 12 |
|---|---|
| Displacement | 619 ci [10.1 L] |
| Air cleaner | Dual paper elements with aspirator |
| Bore/Stroke | 5.12x5.00 inches [130 x 127 mm] |
| Coolant capacity | 48 qts [45.4 L] |
| Oil capacity | 28 qts [26.5 L] |
| Rated RPM | 2100 |
| Compression | 15.2:1 |
| Power | 290 hp [216.3 kW] |
Transmission Information of John Deere, 8650
Transmission variants 1
- Tractor must be stopped to select one of four ranges. Clutchless power shift between speeds 1-2 and 3-4 in range. A synchronized shift (using clutch) can be made between 2 and 3 in range.
| Transmission | Quad-Range |
|---|---|
| Oil capacity | 150 qts [142.0 L] |
| Clutch | Perma-Clutch hydraulic wet discs |
| Type | Partial power shift |
| Gears | 16 forward and 6 reverse |
Mechanical Specs of John Deere, 8650
- Four-wheel drive
- Hydraulic wet disc brakes
- Articulated power steering
- Sound-Gard cab with air-conditioning
| Final drives | Inboard planetary |
|---|---|
| Differential lock | Electro-hydraulic front and rear |
Power Information of John Deere, 8650
| Rear PTO(optional) | Independent |
|---|---|
| Clutch | Hydraulic wet disc |
| Rear PTO Type | 1000 (1.75) |
Hydraulics Specifications of John Deere, 8650
| Type | Closed center constant-pressure |
|---|---|
| Pump flow | 32 gpm [121.1 lpm] |
| Capacity | 37.5 gal [141.9 L] |
| Valves | 2 to 4 |
Three-Point Hitch of John Deere, 8650
| Rear Type | III/IIIN |
|---|---|
| Control | Lower-link draft sensing |
| Rear lift | 9260 lbs [4200 kg] |
Electrical System of John Deere, 8650
| Ground | Negative |
|---|---|
| Battery CCA | 975 |
| Batteries | 2 |
| Charging system | Alternator |
| Battery volts | 6 |
| Charging amps | 110 |
Where it sits
With 290 HP, the John Deere 8650 sits between 8640 (275 HP) and 8760 (300 HP) in John Deere's range. Its power puts it in the 94th percentile of 1980s models in our database (2052 machines).
Frequently asked questions
How much horsepower does the John Deere 8650 have?
The John Deere 8650 delivers 290 HP.
What years was the John Deere 8650 produced?
The John Deere 8650 was produced in 1982-1988.
What engine does the John Deere 8650 have?
The John Deere 8650 is powered by a Intercooled turbocharged diesel, 6-cylinder engine.
What transmission does the John Deere 8650 use?
The John Deere 8650 uses a Quad-Range transmission.
How much does the John Deere 8650 weigh?
The John Deere 8650 weighs 30270 lbs [13730 kg].
Is the John Deere 8650 4WD?
The John Deere 8650 is available in 4WD.