3947328
Rectangular Ring Seal
Cummins®

The 3947328 Rectangular Ring Seal is a component manufactured by Cummins, a well-established name in the commercial truck industry. This seal is specifically designed for use in commercial trucks, where it contributes to the reliable operation of the vehicle’s engine or transmission system.

Basic Concepts of Rectangular Ring Seals

A Rectangular Ring Seal is a type of gasket used in mechanical systems to prevent leaks between mating surfaces. It functions by creating a tight seal when compressed between two surfaces, typically in applications where there is relative motion or high pressure. These seals are commonly used in engines, transmissions, and other mechanical assemblies to ensure fluid integrity and system efficiency ¹.

Purpose of the 3947328 Rectangular Ring Seal

The 3947328 Rectangular Ring Seal plays a role in the operation of commercial trucks by providing a reliable seal in the engine or transmission system. Its primary function is to prevent leaks of fluids such as oil, coolant, or transmission fluid, which are vital for the proper functioning of the truck’s mechanical systems. By maintaining a secure seal, it helps ensure that these fluids remain within their designated pathways, contributing to the overall efficiency and longevity of the truck’s engine and transmission.

Key Features

The 3947328 Rectangular Ring Seal is characterized by several key features that enhance its performance. It is made from a durable material that can withstand the high pressures and temperatures encountered in commercial truck engines. The design of the seal allows it to conform to irregular surfaces, ensuring a tight fit and effective sealing. Additionally, it may possess unique attributes such as resistance to chemical degradation, which further contributes to its longevity and reliability in demanding applications.

Benefits

Using the 3947328 Rectangular Ring Seal offers several advantages. It provides improved sealing efficiency, which helps maintain the integrity of the engine or transmission system. The seal’s durability ensures long-term performance, reducing the need for frequent replacements. Its resistance to wear and tear, along with chemical degradation, makes it a reliable choice for the harsh environments typical of commercial truck operations.

Installation Process

Proper installation of the 3947328 Rectangular Ring Seal is crucial for its effective performance. The process involves cleaning the mating surfaces to ensure there is no debris that could compromise the seal. The seal should be placed in the designated groove without twisting or damaging it. Tools such as seal installation tools may be required to ensure the seal is seated correctly. Following the manufacturer’s guidelines for installation is recommended to achieve a secure fit.

Troubleshooting Common Issues

Common issues with Rectangular Ring Seals include leaks or seal failure. These problems can often be traced back to improper installation, damage to the seal during installation, or degradation of the seal material over time. Troubleshooting steps may involve inspecting the seal and mating surfaces for damage, ensuring the seal is correctly installed, and replacing the seal if it shows signs of wear or failure.

Maintenance Tips

Regular maintenance is key to prolonging the life of the 3947328 Rectangular Ring Seal. This includes periodic inspections for signs of wear, such as cracks or deformation, and ensuring that the mating surfaces remain clean and free of debris. Replacement of the seal should be considered if any signs of degradation are observed, or as part of routine maintenance to prevent unexpected failures.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a strong reputation in the commercial truck industry for producing reliable and high-performance components. The company’s product range includes engines, powertrain components, and aftermarket parts, all designed to meet the demanding requirements of commercial vehicle applications.

Cummins Rectangular Ring Seal (Part 3947328) Compatibility

The Cummins Rectangular Ring Seal, identified by part number 3947328, is designed to ensure optimal sealing performance in various engine configurations. This part is engineered to fit seamlessly with several models within the Cummins engine family, ensuring reliable operation and maintaining the integrity of the engine’s sealing system.

ISB Engines

The ISB (Chrysler) engine series, including the ISB CM850, is one of the platforms where the 3947328 seal is utilized. This series is known for its robust design and efficiency, making it a popular choice in various applications. The rectangular ring seal plays a vital role in these engines by providing a tight seal that prevents oil and other fluids from leaking, thus maintaining engine performance and longevity.

QSB5.9 CM850

Similarly, the QSB5.9 CM850 engine also benefits from the use of the 3947328 seal. This engine model is recognized for its versatility and durability, often used in heavy-duty applications. The rectangular ring seal in this engine ensures that there are no gaps or leaks in the sealing system, which is crucial for the engine’s overall efficiency and reliability.

Application Across Models

The 3947328 seal’s design allows it to be compatible with both the ISB CM850 and QSB5.9 CM850 engines, making it a versatile component within the Cummins engine family. Its ability to fit multiple models underscores its importance in maintaining the sealing integrity across different engine types, ensuring that these engines operate at peak performance levels.

Role of Part 3947328 Rectangular Ring Seal in Engine Systems

In the context of engine systems, the 3947328 Rectangular Ring Seal is instrumental in ensuring the integrity and efficiency of various components.

Flywheel Housing

When integrated into the flywheel housing, the 3947328 Rectangular Ring Seal plays a significant role in maintaining a secure seal between the housing and the engine block. This seal is essential for preventing oil leaks, which can lead to reduced lubrication efficiency and potential engine damage. The seal’s rectangular shape allows it to fit snugly into the housing, providing a robust barrier against oil seepage.

Lower Engine Gasket Kit

In the lower engine gasket kit, the 3947328 Rectangular Ring Seal is often used to seal critical junctions where oil and coolant pathways intersect with the lower portion of the engine. Its precise fit and durable material ensure that these fluids remain contained within their respective systems, preventing cross-contamination and maintaining the engine’s operational efficiency.

Service Kit

Within a service kit, the 3947328 Rectangular Ring Seal is a key component for routine maintenance and overhauls. It is designed to replace worn-out seals, restoring the engine’s sealing integrity. This is particularly important in high-stress areas where seals are prone to degradation over time. The inclusion of this seal in a service kit underscores its importance in preserving the engine’s performance and longevity.

Conclusion

The 3947328 Rectangular Ring Seal is a critical component in the maintenance and operation of commercial truck engines. Its design and material properties ensure reliable sealing performance, contributing to the overall efficiency and longevity of the engine. Proper installation, regular maintenance, and timely replacement are essential to maximize the benefits of this Cummins part.