3901764
Retaining Ring
Cummins®

The Cummins 3901764 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. The significance of this retaining ring lies in its ability to contribute to the overall reliability and performance of the truck’s 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 fitting into a groove and exerting a radial force that holds the component securely in place. This mechanism is essential for maintaining the integrity and functionality of mechanical assemblies ¹.

Purpose of the 3901764 Retaining Ring

The Cummins 3901764 Retaining Ring plays a specific role in securing components within the truck’s systems. It is commonly associated with the engine and transmission assemblies, where it helps to keep gears, bearings, and other parts positioned correctly. This ensures smooth operation and reduces the risk of component misalignment or failure.

Key Features

The Cummins 3901764 Retaining Ring is characterized by several key features that enhance its functionality. It is typically made from high-strength steel, which provides durability and resistance to wear. The design includes a coiled shape that allows it to expand and contract, fitting securely into grooves without the need for additional fasteners. Additionally, the ring may feature specialized coatings or treatments to improve corrosion resistance and longevity ².

Benefits

Using the Cummins 3901764 Retaining Ring offers several advantages. It contributes to improved reliability by ensuring that components remain securely in place, reducing the likelihood of operational issues. The ring’s durable construction enhances the longevity of the associated truck components, leading to better overall performance and reduced maintenance requirements.

Installation Process

Proper installation of the Cummins 3901764 Retaining Ring involves several steps. First, ensure that the groove where the ring will be placed is clean and free of debris. Use appropriate tools to expand the ring and place it into the groove, ensuring it sits flush and exerts even pressure. It is important to avoid over-expanding the ring, as this can lead to damage or improper seating. Following these best practices will help ensure a secure and effective installation ³.

Troubleshooting and Maintenance

Identifying and resolving issues related to the Cummins 3901764 Retaining Ring can help maintain the performance of the truck’s components. Common signs of wear include deformation or corrosion of the ring. Regular inspection during maintenance intervals can help identify these issues early. If wear is detected, replacing the ring promptly can prevent further damage to the associated components.

Common Applications

The Cummins 3901764 Retaining Ring is commonly used in various applications within heavy-duty trucks. It is often found in engine and transmission assemblies, where it secures gears, bearings, and other critical parts. Additionally, it may be used in other mechanical systems where secure component placement is necessary for optimal performance.

Manufacturer Information - Cummins

Cummins is a well-established manufacturer with a strong reputation in the heavy-duty truck industry. The company has a long history of producing high-quality components and systems designed to enhance the performance and reliability of trucks. Their range of products includes engines, transmissions, and various aftermarket parts, all of which are engineered to meet the demanding requirements of heavy-duty applications.

Retaining Ring Part 3901764 Compatibility with Cummins Engines

The Cummins Retaining Ring part number 3901764 is designed to fit a variety of Cummins engines, ensuring secure retention of components within the engine system. Below is a detailed breakdown of the engines that this part is compatible with:

Compatible Engines

• 6C8.3
• C GAS PLUS CM556
• C8.3 G
• G8.3
• G8.3 CM558
• GTA8.3 CM558
• ISL G CM2180
• L GAS PLUS CM556
• L8.9G CMOH2.0 L125B
• L9.3 L105
• QSL9 G CM558

Grouping of Compatible Engines

Group 1: G Series Engines

• G8.3
• G8.3 CM558
• GTA8.3 CM558

Group 2: C Series Engines

• 6C8.3
• C GAS PLUS CM556
• C8.3 G

Group 3: L Series Engines

• L GAS PLUS CM556
• L8.9G CMOH2.0 L125B
• L9.3 L105

Group 4: QSL Series Engines

• QSL9 G CM558

Group 5: ISL Series Engines

• ISL G CM2180

The retaining ring part 3901764 is engineered to provide a snug fit and reliable performance across these diverse engine models, ensuring the longevity and efficiency of the engine components it supports.

Role of Part 3901764 Retaining Ring in Engine Systems

In the intricate dance of engine components, the Part 3901764 Retaining Ring plays a significant role in ensuring the proper function and longevity of various parts. Specifically, this retaining ring is instrumental in the assembly and operation of the lever, rocker, and rocker lever within engine systems.

Lever

The lever, a fundamental component in engine systems, relies on the retaining ring to secure its position and ensure stability during operation. By holding the lever in place, the retaining ring prevents undue movement that could lead to misalignment or damage. This stability is essential for the lever to perform its function effectively, whether it is part of a control system or a mechanical linkage.

Rocker

In the context of the rocker, the retaining ring is equally important. The rocker, which often oscillates to transfer motion, depends on the retaining ring to maintain its precise positioning on the shaft or pivot point. This ensures that the rocker can move smoothly and consistently, which is vital for the accurate transmission of motion within the engine. The retaining ring’s role here is to provide the necessary support and security, allowing the rocker to function without interference.

Rocker Lever

The rocker lever, a combination of the lever and rocker functions, benefits significantly from the retaining ring. This component often experiences dynamic forces during engine operation. The retaining ring ensures that the rocker lever remains firmly in place, preventing any slippage or misalignment that could compromise its performance. This is particularly important in high-stress environments where precision and reliability are paramount.

Conclusion

In summary, the Cummins 3901764 Retaining Ring is a key element in the reliable operation of levers, rockers, and rocker levers within engine systems. Its role in securing these components ensures that they can perform their intended functions with accuracy and consistency, contributing to the overall efficiency and durability of the engine.