3420804
Retaining Ring
Cummins®

The Cummins 3420804 Retaining Ring is a specialized component designed for use in commercial trucks. Its primary role is to secure various parts within the truck’s engine and other mechanical systems, ensuring they remain in place under operational conditions. This part is integral to maintaining the structural integrity and efficiency 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 exerting a constant pressure against the inner diameter of a bore or the outer diameter of a shaft, thereby securing parts in place. Retaining rings come in various designs, including internal, external, and segmented types, each suited to specific applications based on the mechanical requirements and environmental conditions ¹.

Purpose of the Cummins 3420804 Retaining Ring

The Cummins 3420804 Retaining Ring plays a specific role in the operation of commercial trucks by securing components within the engine system. It is typically used to hold bearings, gears, or other parts in place on a shaft, ensuring they do not shift or become dislodged during operation. This stability is crucial for the efficient and reliable performance of the truck’s engine, contributing to overall vehicle durability and safety ².

Key Features

The Cummins 3420804 Retaining Ring is characterized by several distinctive features that enhance its performance. It is made from high-quality materials, ensuring durability and resistance to wear and corrosion. The design of the ring allows for easy installation and removal, while its precise dimensions ensure a secure fit within the engine components. Additionally, the ring’s flexibility enables it to conform to slight irregularities in the bore or shaft, providing a consistent holding force ³.

Benefits

Using the Cummins 3420804 Retaining Ring offers several advantages in truck operations. Its durable construction and reliable performance contribute to the longevity of the engine components it secures. The ring’s design also enhances the efficiency of the truck’s mechanical systems by ensuring parts remain in their intended positions, reducing the risk of operational failures. Furthermore, the ease of installation and removal of the retaining ring simplifies maintenance procedures, saving time and labor costs ⁴.

Installation Process

To install the Cummins 3420804 Retaining Ring correctly, follow these steps:

1. Ensure the shaft or bore is clean and free of debris.
2. Use appropriate tools to expand the retaining ring slightly, allowing it to be placed over the shaft or into the bore.
3. Position the ring within the designated area, ensuring it is aligned correctly.
4. Release the tools, allowing the ring to contract and secure the component in place.
5. Verify the installation by checking that the ring is seated properly and that the component is held securely.

Common Issues and Troubleshooting

Typical problems with retaining rings may include improper seating, leading to component movement, or corrosion, which can weaken the ring’s hold. To address these issues:

• Inspect the ring and the bore or shaft for signs of wear or damage.
• Clean the area thoroughly before reinstallation.
• Replace the retaining ring if it shows signs of corrosion or if it no longer holds components securely.

Maintenance Tips

To ensure the optimal performance of the Cummins 3420804 Retaining Ring, consider these maintenance tips:

• Regularly inspect the ring and the components it secures for signs of wear or damage.
• Clean the retaining ring and its installation area during routine maintenance checks.
• Replace the ring as part of scheduled maintenance or if it shows signs of failure.

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 commercial truck industry. The company’s extensive product range includes engines, powertrains, and aftermarket parts, all designed to meet the demanding requirements of commercial vehicle operators worldwide.

Cummins Part 3420804 Retaining Ring Compatibility

The Cummins part 3420804, a Retaining Ring, is designed to fit seamlessly with a variety of engine models. This part is integral to maintaining the operational integrity of the engines by ensuring that certain components remain securely in place.

Compatible Engines

• QSV81G, QSV91-G4 CM558/CM700 V102, QSV91G, QSW/QSV82, QSW27, QSW36, QSW73

The Retaining Ring part 3420804 is engineered to fit these engines, ensuring that it provides the necessary support and stability. This compatibility ensures that the engines can operate efficiently and reliably.

Grouping of Compatible Engines

The engines listed can be grouped based on their series and model variations:

• QSV Series: QSV81G, QSV91-G4 CM558/CM700 V102, QSV91G, QSW/QSV82
• QSW Series: QSW27, QSW36, QSW73

This grouping helps in understanding the broader application of the part across different engine models within the same series. The Retaining Ring part 3420804 is versatile enough to be used across these models, ensuring a consistent fit and function.

Application Considerations

When applying the Retaining Ring part 3420804 to these engines, it is crucial to follow the manufacturer’s guidelines to ensure proper installation. This will help maintain the performance and longevity of the engines.

Role of Part 3420804 Retaining Ring in Engine Systems

The Part 3420804 Retaining Ring is an essential component in various engine systems, ensuring the secure attachment and proper functioning of several critical assemblies and modules.

In the Assy, Lom Fee and Assy, Lom Fwe, the retaining ring plays a significant role in maintaining the integrity of the lubricating oil module assemblies. It ensures that the components within these assemblies remain firmly in place, preventing any potential misalignment or detachment that could lead to system failure.

Within the Cooler, Engine Oil system, the retaining ring is utilized to secure the filter housing and the full flow oil filter. This ensures that the oil filtration process is efficient and uninterrupted, contributing to the overall performance and longevity of the engine.

In the Filter, Full Flow Oil and Filter, Lubricating Oil systems, the retaining ring is instrumental in holding the filter elements in place within their respective housings. This secure fit is vital for the effective filtration of contaminants from the oil, which is essential for maintaining engine health.

The Filter Assembly Housing and Filter Housing both rely on the retaining ring to ensure that the filter components are correctly positioned and sealed. This is particularly important in the Full Flow Assembly Filter and Full Flow Oil Filter systems, where consistent and reliable filtration is necessary to protect the engine from wear and damage.

For the Lubricating Oil Assembly and Lubricating Oil Assembly Filter, the retaining ring helps in maintaining the structural integrity of the filter head and the overall assembly. This ensures that the lubricating oil is properly filtered before it is circulated through the engine, enhancing lubrication efficiency and engine protection.

In the Lubricating Oil Filter Head and Lubricating Oil Module Assembly, the retaining ring is used to secure the filter elements and other critical components, ensuring that the lubricating oil system operates smoothly and effectively.

Overall, the Part 3420804 Retaining Ring is a key component in various engine systems, providing the necessary security and stability for the proper functioning of filter assemblies, housings, and modules.

Conclusion

The Cummins 3420804 Retaining Ring is a critical component in the maintenance and operation of commercial truck engines. Its role in securing various parts within the engine system ensures the structural integrity and efficiency of the truck’s components. The ring’s durable construction, ease of installation, and reliable performance contribute to the longevity and safety of the vehicle. Regular maintenance and proper installation are essential to maximize the benefits of this part.