The John Deere 4320 is a versatile and powerful utility tractor designed to bridge the horsepower gap between the John Deere 4020 and the larger 4520/4620 models.

It was produced primarily in the early 1970s and is renowned for its robust turbocharged diesel engine and durable build, making it a favorite among farmers for a wide range of agricultural tasks.

Among the many advanced machines designed to meet these demands, the John Deere 4320 stands out as a symbol of innovation and reliability.

This versatile tractor, developed by John Deere, is widely used in a variety of agricultural applications, from plowing and tilling to harvesting and transport.

John Deere 4320: A Technological Powerhouse in Agricultural Machinery

The John Deere 4320 is a compact yet powerful utility tractor that combines the reliability and familiarity of the 4020 series with enhanced turbocharged engine performance and modernized features.

Its choice of transmissions, robust hydraulics, and versatile PTO options make it suitable for a wide range of farming applications, from tillage to loader work.

With its solid construction and operator-friendly options, the 4320 remains a respected model among farmers and collectors alike.

In this article, we will explore the key technical specifications of the John Deere 4320, highlighting its performance, features, and capabilities.

Engine and Performance

The 4320 is powered by a 2.4L 4-cylinder turbocharged diesel engine delivering approximately 48 horsepower at 2400 RPM and about 127 lb-ft of torque at 1440 RPM.

This turbocharged engine was an upgrade over the 4020’s naturally aspirated engine, featuring a relocated injection pump for improved efficiency, enhanced oiling with piston cooling jets, and a redesigned cooling system with a larger radiator and more oil capacity to handle the increased heat from turbocharging.

Transmission Options

The transmission system is designed for easy shifting and durability, ensuring long-term reliability.

John Deere offered two main transmission choices for the 4320:

PowrReverser Transmission:

A 12-speed (12 forward and 12 reverse) partially synchronized transmission with wet forward and reverse clutches, known for durability and long service life.

It allows smooth direction changes without clutching, ideal for fieldwork requiring frequent shifting.

eHydro Transmission (optional):

An electronic hydrostatic transmission with three speed ranges, providing seamless speed control and high torque at startup.

It eliminates the need for clutching and allows easy speed and direction changes, enhancing operator comfort and precision.

Hydraulics and PTO

The hydraulic system of the John Deere 4320 is a crucial component that enables the operation of various implements and attachments.

The tractor features a Category 1 three-point hitch with a lift capacity of approximately 3,100 lbs at 24 inches behind the hitch pin, suitable for a variety of implements.

The hydraulic system is a closed-center type with a pump flow around 22 gallons per minute, supporting up to three remote valves for auxiliary equipment.

The Power Take-Off (PTO) is independent,which allows the tractor to transfer power to attached machinery.

With rear PTO speeds of 540 and 1000 RPM, enabling compatibility with a wide range of implements.

A mid-PTO option running at 2100 RPM is also available for specialized equipment.

Dimensions and Weight

Wheelbase: 106.5 inches (270 cm)

Length: Approximately 128 inches (3256 mm)

Width: Around 65.6 inches (1666 mm) with standard R1 tires

Height: About 97.2 inches (2469 mm) with ROPS

Operating Weight: Ranges from about 4,000 lbs to over 9,000 lbs depending on configuration, with the utility model around 4,480 lbs and row-crop versions heavier[1][2][4][5].

Operator Comfort and Options

The tractor also includes a comfortable operator station with a cab option, providing a safe and ergonomic environment for the operator.

The 4320 comes with an open operator station equipped with power steering and power brakes.

Safety features include a two-post Roll-Gard ROPS with canopy options and an optional fully enclosed cab with heating and air conditioning for all-weather operation.

Traction and Wheelbase

The John Deere 4320 has a wheelbase of 1,829 mm (72 inches), which provides a stable and balanced operation in the field.

The tractor is equipped with front and rear wheels that are designed for optimal traction, ensuring efficient performance on various soil types and terrains.

Additional Features

Fuel capacity is approximately 14.5 gallons (55 liters), providing good operational endurance.

Tires vary by configuration, commonly fitted with R1 agricultural tires sized 10.00-16 front and 18.4-34 rear.

Electrical system runs on 12 volts with a 75-amp alternator.

The tractor is known for its durability, with beefed-up frame rails and driveline components compared to the 4020, improving stability and traction.

It is equipped with a Category I three-point hitch, allowing for the attachment of various implements.

The John Deere 4320 features power steering, making it easier to maneuver in the field.

Summary

The John Deere 4320 is a testament to John Deere’s commitment to innovation and quality in agricultural machinery.

With its powerful engine, reliable transmission, and versatile hydraulic system, the 4320 is a valuable asset for farmers and agricultural professionals.

Whether it’s plowing, tilling, or transporting, the John Deere 4320 delivers performance, durability, and efficiency, making it a trusted choice in the world of modern agriculture.

This detailed overview captures the technical essence and practical strengths of the John Deere 4320, highlighting why it remains a valued tractor for agricultural operations.