John Deere 8640 Tractor Parts

8640 parts and accessories

The John Deere 8640, manufactured from 1978 to 1981, was a powerful articulated 4WD tractor popular for its robust build and pulling capabilities. Powered by a 275 HP turbocharged diesel engine, the 8640 delivered impressive performance for demanding tillage and planting operations. With a PTO horsepower rating of 215, this tractor was a workhorse on many farms, contributing to increased productivity and efficiency.

The John Deere 8640 was introduced in 1978 as part of John Deere's lineup of high-horsepower articulated four-wheel-drive tractors. Production ran through 1981. The tractor is powered by a John Deere 619 cu in (10.1 L) turbocharged diesel engine, producing approximately 275 horsepower. This engine provided ample power for heavy draft work. The 8640 featured an 8-speed Quad-Range transmission, offering a range of speeds suitable for various field operations. The PTO delivered 215 horsepower at either 540 or 1000 RPM, catering to different implement requirements. The hydraulic system had a capacity of approximately 30 gallons per minute, providing sufficient flow for implements. It was typically equipped with 2-3 remote hydraulic valves. The 3-point hitch was a Category III, capable of lifting around 7,500 lbs. Common farming applications included primary tillage (plowing, disking), secondary tillage (cultivation), planting, and pulling large implements. The 8640 distinguished itself with its articulated steering, providing a tighter turning radius compared to other large tractors of the time, and its reliable powertrain, making it a favorite among farmers needing a durable and powerful machine.

Specifications

Engine	John Deere 619 cu in (10.1L) 275 HP Diesel
PTO HP	215 HP @ 1000 RPM
Transmission	Quad-Range, 8-speed
Hydraulics	30 GPM, 2-3 remotes
3-Point Hitch	Category III, 7,500 lbs
Fuel Capacity	150 gallons
Weight	24,310 lbs
Years Produced	1978-1981

Maintenance Tips

Engine Oil & Filter: Change the engine oil and filter every 250 hours of operation using a high-quality diesel engine oil that meets John Deere's specifications. Regularly check the oil level.
Hydraulic System: Inspect hydraulic fluid levels and filters every 500 hours. Replace hydraulic filters according to the manufacturer's recommendations to prevent contamination and maintain optimal performance.
Fuel System: Use clean, high-quality diesel fuel. Regularly check and drain the fuel filter/water separator to remove any water or sediment, preventing fuel injector damage.
Seasonal Storage: Before storing the tractor for extended periods, fill the fuel tank to minimize condensation. Add a fuel stabilizer to prevent fuel degradation. Disconnect the battery and store it in a cool, dry place.

History & Background

The John Deere 8640 was a significant step in John Deere's development of large, articulated 4WD tractors. Introduced in the late 1970s, it offered farmers a powerful and reliable machine for handling increasingly demanding agricultural tasks. Its success paved the way for future generations of high-horsepower tractors.

Frequently Asked Questions

What engine is in the John Deere 8640?

The John Deere 8640 is equipped with a John Deere 619 cu in (10.1 L) turbocharged diesel engine producing approximately 275 horsepower.

What is the PTO horsepower on a 8640?

The John Deere 8640 delivers 215 PTO horsepower and operates at 1000 RPM.

What oil filter fits the 8640?

The John Deere 8640 commonly uses a John Deere AR51782 or equivalent oil filter. Cross-references include Wix 51793 and Fram PH3600.

What are common parts needed for the 8640?

Commonly needed parts for the John Deere 8640 include engine oil filters, fuel filters, air filters, hydraulic filters, belts (fan, alternator), hydraulic seals, steering components (tie rod ends), clutch discs and related clutch components.

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