John Deere 4420 Combine Parts

4420 parts and accessories

The John Deere 4420 combine, manufactured from 1980 to 1984, was a popular choice for farmers needing a reliable and efficient machine. Powered by a John Deere diesel engine producing around 105 HP, the 4420 offered header widths up to 20 feet. Its conventional separator system and easy-to-maintain design made it a workhorse in the field, especially for smaller to medium-sized farms.

The John Deere 4420 was introduced in 1980 as part of the 4000 series combine lineup and remained in production until 1984. This combine is equipped with a John Deere 4276T 4.5L (276 ci) 4-cylinder turbocharged diesel engine, rated at approximately 105 horsepower. The 4420 utilizes a conventional threshing system with a 38-inch wide cylinder. Grain tank capacity is around 75 bushels, and the unloading auger can empty the tank at a rate of approximately 25 bushels per minute. Available header widths ranged from 13 to 20 feet, allowing for versatility in different field conditions. While a chopper or spreader was an option, many models were sold without. The cab offered basic operator comfort with options for air conditioning. The 4420 excels at harvesting grains like wheat, soybeans, and corn, offering a balance of capacity and maneuverability.

Specifications

Engine	John Deere 4276T 105 HP 4.5L Diesel
Separator Type	Conventional - 38-inch Cylinder
Grain Tank	75 bushels
Unloading Rate	25 bu/min
Header Widths	13-20 ft
Fuel Capacity	55 gallons
Weight	13,500 lbs
Years Produced	1980-1984

Maintenance Tips

Concave Adjustment: Regularly check and adjust concave clearance according to the crop being harvested to optimize threshing performance and minimize grain loss.
Belt and Chain Tension: Inspect all belts and chains for wear and proper tension. Loose belts or chains can lead to reduced efficiency and potential component failure.
Sieve and Chaffer Cleaning: Keep the sieves and chaffer clean to ensure proper separation of grain from chaff and debris. Regular cleaning prevents plugging and maximizes harvesting efficiency.
Bearing Greasing: Follow the recommended greasing schedule for all bearings on the combine. Proper lubrication extends bearing life and prevents costly breakdowns during harvest season.

History & Background

The John Deere 4420 was introduced in 1980, building upon the success of previous John Deere combine models. While not a revolutionary design, it offered improvements in fuel efficiency and operator comfort compared to earlier models. The 4420 served as a dependable and cost-effective harvesting solution for many farmers during its production years.

Frequently Asked Questions

What engine is in the John Deere 4420?

The John Deere 4420 is powered by a John Deere 4276T 4.5L (276 cubic inch) 4-cylinder turbocharged diesel engine, producing approximately 105 horsepower.

What is the grain tank capacity on a 4420?

The grain tank capacity of the John Deere 4420 is approximately 75 bushels, and the unloading rate is around 25 bushels per minute.

What type of separator does the 4420 have?

The John Deere 4420 utilizes a conventional threshing system with a 38-inch wide cylinder for separating grain from the crop material.

What are common parts needed for the 4420?

Common wear parts for the John Deere 4420 include concaves, rasp bars, belts, chains, bearings, auger fingers, and sickle sections. Regular replacement of these parts helps maintain optimal performance.

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