3901996
Retaining Ring
Cummins®

Introduction

The Cummins 3901996 Retaining Ring is a specialized component designed for use in heavy-duty truck applications. Its purpose is to secure various parts within the truck’s mechanical systems, ensuring they remain in place under operational conditions. This retaining ring is significant due to its role in maintaining the integrity and functionality of critical truck components.

Basic Concepts of Retaining Rings

Retaining rings, also known as circlips, are mechanical fasteners used to prevent components from moving along a shaft or within a housing. They operate by exerting a constant pressure against the inner diameter of a bore or the outer diameter of a shaft, thereby securing the position of the component. Retaining rings are vital in various mechanical systems for their simplicity, reliability, and ease of installation ¹.

Purpose of the 3901996 Retaining Ring

The Cummins 3901996 Retaining Ring is specifically designed to secure components within the truck’s engine and transmission systems. It plays a role in ensuring that parts such as gears, bearings, and other rotating components remain fixed in place. This is vital for the smooth operation and longevity of the truck’s mechanical systems.

Key Features

The Cummins 3901996 Retaining Ring is characterized by its robust design and high-quality materials. It is typically made from spring steel, which provides the necessary strength and flexibility. The ring’s design includes a split section that allows it to be easily installed and removed without the need for specialized tools. This design also ensures a secure fit, contributing to the ring’s durability and reliability in demanding applications ².

Benefits

Using the Cummins 3901996 Retaining Ring offers several advantages. It enhances the reliability of the truck’s mechanical systems by ensuring components remain securely in place. The ring’s design allows for easy installation and removal, reducing maintenance time and effort. Additionally, its durable construction contributes to the overall efficiency and longevity of the truck’s components.

Installation Process

Installing the Cummins 3901996 Retaining Ring involves several steps. First, the component to be secured should be positioned within the bore or on the shaft. Using a retaining ring plier, the ring can be expanded and placed over the component. Once in position, the plier is used to compress the ring, allowing it to snap into place within the groove of the bore or shaft. This process ensures a secure fit without the need for additional fasteners ³.

Troubleshooting Common Issues

Common issues with retaining rings may include improper installation, which can lead to component movement or failure. To address these issues, it is important to ensure the ring is correctly sized for the application and properly seated within the groove. Regular inspection during maintenance can help identify any signs of wear or damage, allowing for timely replacement.

Maintenance Tips

Regular inspection of the Cummins 3901996 Retaining Ring is recommended to ensure continued optimal performance. Look for signs of wear, corrosion, or deformation, which may indicate the need for replacement. Keeping the ring and its surrounding components clean and free of debris will also contribute to its longevity and effectiveness.

Cummins 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 reputation for quality, reliability, and innovation in the automotive and heavy-duty truck industry. The company’s product range includes engines, powertrain components, and aftermarket parts, all designed to meet the demanding requirements of commercial and industrial applications.

Compatibility with Specific Engine Models

The Cummins part 3901996, a Retaining Ring, is compatible with several engine models, including:

• 6C8.3, C8.3 G, G8.3, QSC8.3 CM554, QSL9 CM554
• ISC CM554, ISL CM554

These engines share common design elements that allow this retaining ring to function effectively across the board.

Grouping of Compatible Engines

The engines are grouped based on their similar design and operational parameters:

• QSC8.3 CM554 and QSL9 CM554
• 6C8.3, C8.3 G, G8.3

The retaining ring is meticulously designed to fit these engines, providing a reliable solution for maintaining the integrity of the engine components.

Importance of the Retaining Ring

The retaining ring plays a vital role in the overall functionality of the engine. By securing various parts in place, it helps to prevent wear and tear, ensuring that the engine operates smoothly and efficiently. This part is essential for maintaining the performance and reliability of the engine, making it a critical component for engine maintenance and repair.

Role of Part 3901996 Retaining Ring in Engine Systems

The 3901996 Retaining Ring is an essential component in various engine systems, ensuring the secure positioning of multiple parts within the engine assembly. Its application spans across a wide range of components, contributing to the overall functionality and reliability of the engine.

In the Cylinder 6C Kit and Cylinder 6Cart Kit, the retaining ring plays a significant role in securing the piston within the cylinder, preventing any unwanted movement that could lead to engine inefficiency or damage. Similarly, in the Cylinder Block and comprehensive Cylinder Kit, it ensures that all moving parts are held in place, maintaining the structural integrity of the engine.

For the Engine Assembly Piston and individual Engine Piston, the retaining ring is vital in keeping the piston securely in its designated position within the cylinder, facilitating smooth and consistent engine operation. In the context of Injectors, it aids in maintaining the precise alignment and secure fitting of these components, which is essential for fuel delivery accuracy.

Within the Cylinder 6CTA Kit, Cylinder 6CTAA Kit, and Cylinder 6CT Kit, the retaining ring contributes to the stability and proper function of the cylinder components, ensuring optimal performance. For Ford Dealer Kits and PDC Kits, it provides a reliable means of securing parts, enhancing the durability and efficiency of the engine.

In Long Block and Short Block configurations, including the Short Block 6C, Short Block 6Cart, and Short Block 6CTA, the retaining ring is instrumental in maintaining the integrity of the engine’s internal components. It is also a key component in Short Engine Kits, where it ensures that all parts are correctly positioned and secured.

Furthermore, in Overhaul Kits, Performance Parts, Piston 6C Sets, Piston Kits, Piston Sets, and Piston Skirt Kits, the retaining ring is essential for the secure installation and operation of pistons and related components. In Repair Kits, it plays a role in ensuring that replacement parts are correctly fitted, contributing to the successful repair and restoration of engine functionality.

Overall, the 3901996 Retaining Ring is a fundamental component in a variety of engine systems, providing the necessary security and stability for the proper function and longevity of the engine.

Conclusion

The Cummins 3901996 Retaining Ring is a critical component in heavy-duty truck applications, ensuring the secure positioning of various parts within the engine and transmission systems. Its robust design, ease of installation, and durable construction make it an essential part for maintaining the reliability and efficiency of truck mechanical systems. Regular maintenance and proper installation are key to maximizing the benefits of this retaining ring.