John Deere S790 Combine Parts

S790 parts and accessories

The John Deere S790 combine, manufactured from 2018 onwards, delivers exceptional harvesting performance with its powerful engine producing over 500 HP. Available with a range of header widths to suit various field sizes and crop types, the S790 utilizes a high-capacity rotary separator, known for its high throughput. This model became a favorite among farmers due to its advanced technology, increased productivity, and reduced grain loss.

The John Deere S790 combine harvester, introduced in 2018, quickly became a flagship model in the John Deere S-Series lineup. Powered by a John Deere PowerTech 13.5L engine producing approximately 543 peak horsepower, this combine offers substantial power for demanding harvesting conditions. Its X9-like feeder house contributes to optimal crop feeding. The heart of the S790 is its single rotor separator, designed to gently thresh and separate grain from the MOG (material other than grain), minimizing grain damage. The grain tank boasts a capacity of 400 bushels, and the unloading auger can discharge grain at a rate of up to 4.8 bushels per second (288 bu/min), enabling quick unloading and reduced downtime. Available header widths range from narrow row crop heads to wide draper heads up to 45 feet. The S790 features advanced residue management with fine cut chopper and adjustable spreader options. Its spacious and technologically advanced cab provides operators with enhanced comfort, visibility, and control through the CommandARM console and GreenStar display. The S790 excels in harvesting a variety of crops, including corn, soybeans, wheat, and other small grains.

Specifications

Engine	John Deere PowerTech 13.5L 543 HP Diesel
Separator Type	Single Rotor - 312 mm Rotor Diameter
Grain Tank	400 bushels
Unloading Rate	288 bu/min
Header Widths	30-45 ft
Fuel Capacity	300 gallons
Weight	Approximately 39,000 lbs
Years Produced	2018-Present

Maintenance Tips

Concave Adjustment: Regularly inspect and adjust concave clearance based on crop type and moisture content to optimize threshing efficiency and minimize grain damage.
Belt and Chain Tension: Check and maintain proper tension on all belts and chains. Loose belts and chains can cause slippage, leading to reduced performance and premature wear.
Sieve and Chaffer Cleaning: Clean sieves and chaffers frequently to prevent buildup of debris, ensuring proper airflow and efficient grain separation. Pay special attention when transitioning between crops.
Bearing Greasing: Follow the recommended greasing schedule for all bearings. Proper lubrication extends bearing life and prevents costly downtime.

History & Background

Introduced in 2018, the John Deere S790 represented a significant advancement in combine technology, building on the success of the S690. It incorporated improvements in engine power, grain handling, and operator comfort. The S790 is a pivotal model in the evolution of combine harvesters, offering a blend of power, capacity, and technology that continues to meet the demands of modern farming operations.

Frequently Asked Questions

What engine is in the John Deere S790?

The John Deere S790 is powered by a John Deere PowerTech 13.5L diesel engine with a peak horsepower of approximately 543 HP.

What is the grain tank capacity on a S790?

The grain tank capacity of the John Deere S790 is 400 bushels, with an unloading rate of up to 288 bushels per minute.

What type of separator does the S790 have?

The John Deere S790 utilizes a single rotor separator, featuring a 312 mm rotor diameter, designed for efficient and gentle threshing and separation of grain.

What are common parts needed for the S790?

Common wear parts for the S790 include concaves, rasp bars, belts, chains, bearings, auger fingers, and sickle sections. Regular replacement of these parts ensures optimal performance and minimizes downtime.

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