4939936
Retaining Ring
Cummins®

Introduction

The Cummins 4939936 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 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 fitting into a groove and exerting a radial force that holds the component in place. This simple yet effective mechanism is crucial in many mechanical systems, providing a secure fit without the need for additional fasteners ¹.

Purpose of the 4939936 Retaining Ring

The Cummins 4939936 Retaining Ring plays a specific role in the operation of heavy-duty trucks. It is designed to secure components within the engine and transmission systems, ensuring that parts such as gears, bearings, and shafts remain properly aligned and in place. This helps maintain the integrity of the mechanical systems, contributing to the truck’s performance and longevity ².

Key Features

The 4939936 Retaining Ring is characterized by several key features that enhance its functionality. It is typically made from high-strength steel, providing durability and resistance to wear. The design includes a coiled shape that allows it to flex and fit into grooves, securing components effectively. Additionally, the ring may feature specific dimensions and tolerances to ensure a precise fit within the designated applications ³.

Benefits

Utilizing the Cummins 4939936 Retaining Ring offers several advantages. Its robust material composition and precise design contribute to improved reliability and efficiency of the truck’s components. By securely holding parts in place, it helps prevent operational issues that could arise from component misalignment or movement. Furthermore, the ring’s durability contributes to the longevity of the associated truck components, reducing the need for frequent replacements.

Installation Process

Proper installation of the 4939936 Retaining Ring is crucial for its effective function. The process involves selecting the appropriate groove on the shaft or housing, ensuring it is clean and free of debris. Using specialized tools, such as retaining ring pliers, the ring is carefully placed into the groove. It is important to ensure that the ring is fully seated and that no part of it protrudes, which could lead to operational issues.

Common Issues and Troubleshooting

Typical problems with the 4939936 Retaining Ring may include improper seating, which can lead to component movement or failure. Troubleshooting involves inspecting the ring and groove for any signs of damage or misalignment. If issues are detected, the ring should be removed and the groove cleaned and inspected. In some cases, replacing the retaining ring may be necessary to ensure proper function.

Maintenance Tips

Regular maintenance of the 4939936 Retaining Ring is important to ensure optimal performance and longevity. This includes periodic inspection for signs of wear or damage, ensuring that the ring remains properly seated, and cleaning the groove to prevent debris accumulation. Following these maintenance procedures can help extend the life of the retaining ring and the components it secures.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration, and emissions solutions. With a history spanning over a century, Cummins has established a reputation for quality, innovation, and reliability in the automotive and heavy-duty truck industry. The company’s product range includes engines, powertrains, and related components, all designed to meet the demanding requirements of heavy-duty applications.

Cummins Engine Part 4939936: Retaining Ring Compatibility

The Cummins part number 4939936, which is a Retaining Ring, is designed to fit seamlessly within the engine systems of the QSB6.7 M CM2250 and QSC8.3 CM850 (CM2850) engines. This retaining ring plays a crucial role in ensuring the proper alignment and functionality of various engine components.

For the QSB6.7 M CM2250 engine, the retaining ring is integral to maintaining the integrity of the engine’s internal mechanisms. It is typically used to secure certain parts in place, preventing unwanted movement that could lead to mechanical failure or reduced efficiency.

In the QSC8.3 CM850 (CM2850) engine, the retaining ring serves a similar purpose. Given the higher power output and more complex design of this engine, the retaining ring’s role is even more critical. It ensures that components such as gears, shafts, and bearings remain securely in position, contributing to the overall reliability and performance of the engine.

Both engines benefit from the precision engineering of the retaining ring, which is crafted to meet the stringent standards set by Cummins. This ensures that the part will function optimally within the engine’s demanding environment, providing long-lasting durability and performance.

Role of Part 4939936 Retaining Ring in Engine Systems

The 4939936 retaining ring is an essential component in various engine systems, ensuring the secure and efficient operation of several key elements.

In the drain system, the retaining ring plays a significant role by securing components that manage the flow of fluids. It ensures that connections remain tight, preventing leaks and maintaining the integrity of the drainage process.

For remote oil systems, the retaining ring is used to secure fittings and adapters that are critical for the distribution of oil to different parts of the engine. This helps in maintaining consistent oil pressure and flow, which is vital for the lubrication and cooling of engine components.

In conjunction with a male adapter elbow, the retaining ring ensures a secure connection, which is particularly important in systems where changes in direction of fluid flow are necessary. This setup is common in complex engine layouts where space optimization is required.

Within plumbing applications, the retaining ring is employed to hold various fittings and connectors in place. This is essential for the reliable transfer of fluids, whether it be fuel, coolant, or lubricants, throughout the engine system.

For marine gear oil coolers, the retaining ring is instrumental in securing the connections between the cooler and the engine’s oil system. This ensures efficient heat exchange and maintains the optimal operating temperature of the gear oil, which is crucial for the longevity and performance of marine engines.

Conclusion

The Cummins 4939936 Retaining Ring is a vital component in the maintenance and operation of heavy-duty truck engines. Its design and functionality contribute significantly to the reliability and efficiency of the engine systems it supports. Proper installation, regular maintenance, and understanding its role within various engine components are essential for maximizing the performance and longevity of the truck’s mechanical systems.