4939935
O Ring Seal
Cummins®

The Cummins 4939935 O-Ring Seal is a critical component designed to maintain the integrity of fluid systems within commercial trucks. Its role is to provide a reliable seal in various applications, contributing to the efficient operation of the vehicle. Understanding the function and significance of this part is essential for maintaining the performance and longevity of commercial trucks.

Basic Concepts of O-Ring Seals

An O-Ring Seal is a toroidal (ring-shaped) elastomer with a circular cross-section, used to create a seal between two or more parts. It functions by being compressed within a groove, creating a barrier that prevents the leakage of fluids or gases. O-Ring Seals are widely utilized in mechanical systems due to their simplicity, effectiveness, and versatility in sealing applications ¹.

Purpose of the 4939935 O-Ring Seal in Truck Operation

The 4939935 O-Ring Seal plays a specific role in the operation of commercial trucks by ensuring the integrity of seals in various engine and system components. It is typically placed in grooves where two surfaces meet, such as in fuel injectors, oil filters, or coolant systems. Its function is to prevent leaks, maintain pressure, and ensure the proper flow of fluids, which is crucial for the engine’s performance and durability ².

Key Features of the 4939935 O-Ring Seal

This Cummins part is characterized by its material composition, which is often nitrile rubber or another durable elastomer, chosen for its resistance to oils, fuels, and varying temperatures. Its design ensures a tight fit within the designated grooves, providing a robust seal even under high pressure and dynamic conditions. These features make it well-suited for heavy-duty applications in commercial trucks ³.

Benefits of Using the 4939935 O-Ring Seal

Utilizing the 4939935 O-Ring Seal offers several advantages, including enhanced sealing efficiency, which contributes to the overall performance and reliability of the truck’s engine and systems. Its durability ensures longevity, reducing the frequency of replacements and maintenance. Additionally, its resistance to a wide range of operating conditions makes it a dependable choice for commercial truck applications.

Installation and Maintenance

Proper installation of the 4939935 O-Ring Seal involves ensuring the groove is clean and free of debris, using lubricants compatible with the O-Ring material to facilitate insertion, and avoiding excessive force that could damage the seal. Regular maintenance checks are recommended to ensure the O-Ring remains in good condition, with replacements performed as needed to maintain optimal performance.

Troubleshooting Common Issues

Common issues with O-Ring Seals, such as leaks or failures, can often be traced to improper installation, degradation due to exposure to incompatible fluids or extreme temperatures, or physical damage. Troubleshooting steps include inspecting the seal and groove for damage, ensuring correct installation practices are followed, and selecting the appropriate O-Ring material for the specific application to prevent future issues.

Compatibility and Application

The 4939935 O-Ring Seal is designed for use within Cummins engines and various commercial truck components, demonstrating its versatility and reliability. Its application across different systems highlights the importance of selecting the correct O-Ring Seal for specific engine and system requirements to ensure compatibility and optimal performance.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration, and emission solutions. With a strong reputation in the commercial truck industry, Cummins is known for its commitment to quality, innovation, and customer satisfaction. The company’s extensive product range and expertise in engine technology underscore the reliability and performance of components like the 4939935 O-Ring Seal.

O-Ring Seal 4939935 in Cummins Engines

The O-Ring Seal part number 4939935, manufactured by Cummins, is a critical component in ensuring the integrity and performance of several Cummins engine models. This seal is designed to provide a reliable barrier against leaks, maintaining the necessary pressure and preventing fluid contamination within the engine system.

Application in QSB6.7 M CM2250

In the QSB6.7 M CM2250 engine, the O-Ring Seal 4939935 is utilized in various critical areas where sealing is essential. This includes connections between engine components, ensuring that oil, coolant, and other fluids remain within their designated pathways. The seal’s placement is crucial for maintaining engine efficiency and longevity.

Application in QSC8.3 CM850 (CM2850)

Similarly, in the QSC8.3 CM850 (CM2850) engine, the O-Ring Seal 4939935 plays a vital role in sealing high-pressure and high-temperature environments. This seal is often found in areas such as the fuel injection system, oil passages, and coolant pathways. Its design and material ensure that it can withstand the demanding conditions of these engines, providing a dependable seal that prevents leaks and maintains system integrity.

Common Usage Across Models

While the specific applications of the O-Ring Seal 4939935 may vary slightly between different engine models, its fundamental purpose remains consistent. This seal is integral to the operation of the engine, providing a barrier that is essential for maintaining the engine’s performance and reliability. Its use across multiple Cummins engine models underscores its versatility and importance in ensuring the smooth operation of these engines.

Role of Part 4939935 O-Ring Seal in Engine Systems

The part 4939935 O-Ring Seal is integral to maintaining the integrity and efficiency of various engine systems. In the context of a Male Adapter Elbow, the O-Ring Seal ensures a tight and leak-proof connection between the adapter and the mating components. This is essential for systems where fluid dynamics and pressure maintenance are key, such as fuel lines or hydraulic systems.

When integrated with Plumbing components, the O-Ring Seal plays a significant role in preventing leaks and ensuring the smooth flow of fluids. Whether it’s water, oil, or other liquids, the seal’s ability to conform to irregularities in mating surfaces helps maintain a consistent seal, which is vital for the longevity and reliability of the plumbing system.

In Marine Gear Oil Coolers, the O-Ring Seal is employed to seal the connections between the cooler and the associated piping. This application is particularly important in marine environments where the seal must withstand corrosive substances and varying temperatures. The O-Ring Seal helps in maintaining the efficiency of the oil cooling process by ensuring that the oil flows without leakage, thus protecting the gear system from overheating and potential damage.

Overall, the part 4939935 O-Ring Seal is a fundamental component in ensuring the operational integrity of these engine systems, contributing to their efficiency, reliability, and longevity.

Conclusion

The Cummins 4939935 O-Ring Seal is a vital component in the maintenance and operation of commercial trucks and Cummins engines. Its role in preventing leaks, maintaining pressure, and ensuring the proper flow of fluids is crucial for the engine’s performance and durability. Understanding its features, benefits, and proper installation and maintenance practices is essential for ensuring the longevity and reliability of commercial truck systems.