John Deere 4320 (1971 – 1972)

John Deere 4320 Overview

The John Deere 4320, a key member of the New Generation Series, is a renowned row-crop tractor with a strong presence in the agricultural landscape of the early 1970s. Here’s a comprehensive evaluation of this tractor:

Specifications:

Engine: The 4320 boasts a turbocharged 6-cylinder diesel engine with 404 cubic inches (6.6 liters) of displacement, producing a robust 115 horsepower at the power take-off (PTO).
Transmission: It features a partially synchronized transmission with 8 forward and 2 reverse gears, complemented by a 13.5-inch dry disc clutch.
Fuel and Hydraulics: With a 44-gallon fuel tank and a 14-gallon closed-center hydraulic system, the 4320 can efficiently power hydraulic attachments with a pump flow of 22 gallons per minute.

Advantages:

Powerful Engine: The turbocharged engine provides substantial horsepower, making it suitable for a wide range of agricultural tasks.
Versatility: Its compatibility with various attachments and configurations, including loader attachments, makes it a versatile choice for different farming operations.
Fuel Efficiency: Despite its power, the 4320 maintains a reasonable fuel consumption rate, contributing to cost-effective operation.
Reliability: John Deere’s reputation for reliability and durability is upheld in this model, ensuring longevity and low maintenance costs.

Disadvantages:

Synchronization: The transmission, while robust, is only partially synchronized, which may require more skillful operation compared to fully synchronized transmissions.
Weight: At an operating weight of over 10,000 lbs, it can be challenging to maneuver on softer ground or smaller fields.
Age: Given its production years, finding replacement parts for older 4320 models may become increasingly difficult.

Common Problems:

Engine Issues: Over time, the turbocharger or engine components may require maintenance or replacement.
Transmission Wear: The transmission may experience wear and tear, potentially leading to gear-shifting problems.
Hydraulic Leaks: Hydraulic systems can develop leaks that require attention.
Electrical Problems: Wiring and electrical components may deteriorate with age.

Safety Features:

Operator Presence System: Ensures the engine and drivetrain halt when the operator leaves the seat.
Safety Switches: Various safety switches prevent operation if certain conditions, such as an open hood or disengaged PTO, are not met.
Rollover Protection Structure (ROPS): Although not always standard in older models, ROPS can be added for rollover protection.

Other Features:

Wheelbase and Dimensions: The tractor’s wheelbase and various dimension options allow customization to suit specific farming needs and field conditions.
Loader Compatibility: The 4320’s ability to accommodate loader attachments like the John Deere 148 and 158 loaders enhances its functionality for tasks beyond traditional row-crop farming.
Steering Options: Depending on the specific model and configuration, the tractor may offer options such as power steering for operator comfort.

In summary, the John Deere 4320 is a classic row-crop tractor known for its power, versatility, and reliability. While it has its limitations due to its age and partially synchronized transmission, it remains a valuable asset on farms, particularly when paired with loader attachments. Farmers appreciate its ability to handle various tasks efficiently, making it a trusted companion for a range of agricultural operations.