John Deere 7700 Combine Parts

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The John Deere 7700 Combine, manufactured from 1977 to 1984, was a popular choice for farmers due to its reliable performance and efficient conventional threshing system. Powered by a John Deere diesel engine producing approximately 175 horsepower, it offered header widths up to 20 feet, making it suitable for a variety of grain harvesting operations. Its robust design contributed to its reputation for dependability in the field.

The John Deere 7700 combine was introduced in 1977 and remained in production until 1984, establishing itself as a workhorse for many farmers. It was powered by a John Deere 6-cylinder diesel engine, typically producing around 175 horsepower with a displacement of approximately 466 cubic inches. The 7700 utilized a conventional threshing system with a cylinder width of around 43 inches. Grain tank capacity was approximately 135 bushels, and the unloading auger could empty the tank at a rate of about 45 bushels per minute. Available header widths ranged from 13 to 20 feet. It also featured options for a straw chopper or spreader. The cab, while not as advanced as later models, provided a functional workspace for the operator. The 7700 excelled at harvesting a variety of crops, including wheat, soybeans, and corn, thanks to its adjustable threshing settings and header options.

Specifications

Engine	John Deere 175 HP 466 cu. in. Diesel
Separator Type	Conventional - 43-inch cylinder width
Grain Tank	135 bushels
Unloading Rate	45 bu/min
Header Widths	13-20 ft
Fuel Capacity	75 gallons
Weight	Approximately 16,000 lbs
Years Produced	1977-1984

Maintenance Tips

Regularly inspect and adjust concave clearance to optimize threshing performance and minimize grain loss.
Check belt and chain tension frequently, especially at the start of the season, to prevent slippage and premature wear.
Clean sieves and chaffers daily to ensure proper separation and prevent plugging, which can reduce efficiency.
Grease all bearings and lubrication points according to the manufacturer's recommendations to prevent premature failure and extend component life.

History & Background

Introduced in 1977, the John Deere 7700 replaced earlier models and provided increased capacity and efficiency. While there weren't major redesigns during its production run, John Deere continually refined components for improved reliability. The 7700 played a significant role in the transition towards larger, more productive combine harvesters.

Frequently Asked Questions

What engine is in the John Deere 7700?

The John Deere 7700 is equipped with a John Deere 6-cylinder diesel engine, typically producing around 175 horsepower with a displacement of approximately 466 cubic inches.