John Deere 9780 Combine Parts

9780 parts and accessories

The John Deere 9780 combine, produced from approximately 1998 to 2003, was known for its robust performance in various crops. Powered by a John Deere engine delivering around 275 horsepower, it offered header widths up to 30 feet. Its rotary separator system made it a favorite for farmers seeking efficient grain harvesting and separation capabilities.

The John Deere 9780 combine harvester was a workhorse in the late 1990s and early 2000s, filling a crucial role in grain harvesting. Its heart was a John Deere 8.1L 6-cylinder diesel engine, producing approximately 275 horsepower. The 9780 utilized a rotary separator system, providing efficient threshing and separation of grain. Grain tank capacity was around 280 bushels, with an unloading auger capable of emptying the tank at a rate of about 2.5 bushels per second (150 bu/min). Available header widths ranged up to 30 feet, allowing for efficient coverage in the field. Options included a fine cut chopper and chaff spreader. The cab featured air conditioning, heating, and updated controls for operator comfort. It was commonly used for harvesting wheat, corn, soybeans, and other small grains and was known for its reliability and high capacity for its time.

Specifications

Engine	John Deere 8.1L 275 HP Diesel
Separator Type	Rotary - Single Rotor
Grain Tank	280 bushels
Unloading Rate	150 bu/min
Header Widths	Up to 30 ft
Fuel Capacity	150 gallons
Weight	Approximately 24,000 lbs
Years Produced	1998-2003 (Approximate)

Maintenance Tips

Concave Adjustment: Regularly check and adjust the concave clearance to optimize threshing performance and minimize grain damage. Refer to the operator's manual for specific settings based on the crop being harvested.
Belt and Chain Tension: Inspect all belts and chains for proper tension and wear. Loose or worn belts and chains can lead to reduced efficiency and potential breakdowns. Replace as needed.
Sieve and Chaffer Cleaning: Periodically clean the sieves and chaffer to prevent clogging and ensure optimal grain separation. Remove any accumulated debris to maintain consistent airflow.
Bearing Greasing: Grease all bearings according to the manufacturer's recommendations. Proper lubrication is crucial for preventing premature wear and extending the lifespan of bearings in critical components.

History & Background

The John Deere 9780 was introduced in the late 1990s as a mid-sized rotary combine offering high capacity grain harvesting. It was a significant model in Deere's combine lineup during its production run, providing a blend of power, efficiency, and reliability for farmers.