3906695
Rectangular Ring Seal
Cummins®

The Rectangular Ring Seal 3906695, manufactured by Cummins, is a specialized component designed for use in commercial trucks. This seal is integral to the reliable operation of truck engines and transmissions, ensuring that fluids remain contained within their designated systems. Cummins, a well-established name in the commercial truck industry, produces this seal to meet the demanding requirements of heavy-duty applications ¹.

Basic Concepts of Rectangular Ring Seals

Rectangular ring seals are mechanical components used to create a seal between two surfaces. They function by being compressed between a static and a dynamic surface, which creates a barrier that prevents fluid leakage. These seals are commonly employed in various mechanical systems, including engines and transmissions, where maintaining fluid integrity is crucial for performance and longevity ².

Purpose of the 3906695 Rectangular Ring Seal

The 3906695 Rectangular Ring Seal plays a specific role in the operation of commercial trucks. Within the engine or transmission system, it ensures that fluids such as oil, coolant, or hydraulic fluid do not leak out, which is vital for maintaining system pressure and efficiency. By providing a reliable seal, this component contributes to the overall performance and durability of the truck’s mechanical systems ³.

Key Features

The 3906695 Rectangular Ring Seal is characterized by several key features that enhance its performance. It is typically made from high-quality materials such as nitrile rubber or fluorocarbon elastomers, which offer excellent resistance to oils, fuels, and other chemicals. The design of the seal includes precise dimensions and a rectangular cross-section that allows it to fit snugly into its designated groove, ensuring a tight seal under various operating conditions. Additionally, the seal may feature anti-extrusion elements to prevent material from being forced out of the groove under high pressure.

Benefits

The advantages provided by the 3906695 Rectangular Ring Seal include improved sealing efficiency, which helps maintain system integrity and performance. Its durable material composition ensures longevity, even under harsh operating conditions. The seal’s resistance to various fluids and temperatures further enhances its reliability, reducing the likelihood of leaks and the need for frequent replacements.

Troubleshooting and Maintenance

Common issues that may arise with the 3906695 Rectangular Ring Seal include wear and tear, extrusion, or damage from contaminants. Troubleshooting these problems involves inspecting the seal for signs of degradation, ensuring it is properly seated in its groove, and checking for any foreign particles that may cause abrasion. Regular maintenance practices, such as cleaning the seal area and replacing the seal at recommended intervals, can help ensure longevity and optimal performance.

About Cummins

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 strong reputation in the commercial truck industry for producing high-quality, reliable components. The company’s product range includes engines, powertrains, and aftermarket parts, all designed to meet the rigorous demands of heavy-duty applications. Cummins’ commitment to innovation and customer satisfaction has solidified its position as a trusted name in the industry.

Cummins Rectangular Ring Seal Part 3906695 Compatibility

The Cummins Rectangular Ring Seal part number 3906695 is designed to fit a variety of Cummins engines, ensuring a secure seal and optimal performance. Here is a detailed look at the compatibility of this part with various Cummins engines:

4B3.9 and 6B5.9 Engines

The Rectangular Ring Seal part 3906695 is compatible with the 4B3.9 and 6B5.9 engines. These engines are known for their robust performance and reliability, often used in heavy-duty applications. The seal ensures that the engine maintains its operational integrity by preventing leaks and maintaining pressure.

6C8.3 and B4.5 Engines

Similarly, the 6C8.3 and B4.5 engines also benefit from the use of the 3906695 seal. These engines are typically found in agricultural and construction machinery, where durability and efficiency are paramount. The seal helps in maintaining the engine’s efficiency by ensuring that there are no unwanted leaks.

L8.9 and L8.9 L121 Engines

The Rectangular Ring Seal part 3906695 is also suitable for the L8.9 and L8.9 L121 engines. These engines are often used in a variety of applications, from on-highway trucks to industrial power systems. The seal’s compatibility with these engines ensures that they can operate under high stress and demanding conditions without compromising on performance.

L9.3 L105 and L9.5 L117 Engines

For the L9.3 L105 and L9.5 L117 engines, the 3906695 seal provides a critical function in maintaining the engine’s sealing integrity. These engines are typically used in medium-duty applications, and the seal helps in maintaining the engine’s efficiency and longevity by preventing leaks and ensuring proper pressure maintenance.

QSB3.9 30 CM550 and QSB5.9 30 CM550 Engines

Lastly, the Rectangular Ring Seal part 3906695 is compatible with the QSB3.9 30 CM550 and QSB5.9 30 CM550 engines. These engines are known for their versatility and are used in a range of applications, from construction equipment to agricultural machinery. The seal ensures that these engines can operate efficiently and reliably by maintaining a secure seal.

Role of Part 3906695 Rectangular Ring Seal in Engine Systems

The Rectangular Ring Seal, identified by part number 3906695, is an essential component in various engine systems, ensuring the integrity and efficiency of the engine’s operation. This seal is strategically placed in several key areas to prevent leaks and maintain pressure, contributing to the overall performance and longevity of the engine.

Integration with Bosch Fuel Pump Kit

In the Bosch Fuel Pump Kit, the Rectangular Ring Seal is utilized to create a secure connection between the fuel pump and the engine block. This seal ensures that fuel is delivered efficiently without any leakage, which is vital for maintaining the correct fuel-to-air ratio and ensuring optimal engine performance.

Application in Cylinder and Piston Kits

When incorporated into Cylinder and Engine Piston Kits, the Rectangular Ring Seal plays a significant role in sealing the combustion chamber. This prevents any gas leakage during the combustion process, which could otherwise lead to a loss of power and efficiency. The seal ensures that the pressure generated within the cylinder is effectively utilized to drive the piston, contributing to the engine’s overall power output.

Use in Fuel System Components

In the Fuel Filter and Fuel Pump Coupling, the Rectangular Ring Seal is employed to ensure a tight seal, preventing fuel leaks and maintaining the system’s integrity. This is particularly important in high-pressure fuel systems where even a minor leak can lead to significant performance issues or safety hazards.

Role in Gasket and Seal Kits

The Rectangular Ring Seal is a common component in Upper and Lower Engine Gasket Kits, as well as Overhaul and Rebuild Kits. In these applications, it helps to seal various engine compartments, such as the cylinder head and engine block, ensuring that coolant, oil, and other fluids remain contained within their designated paths. This containment is essential for maintaining the engine’s lubrication, cooling, and overall operational stability.

Function in Plumbing and Compressor Coolant Systems

In Plumbing and Compressor Coolant Systems, the Rectangular Ring Seal is used to prevent coolant leaks, which is crucial for maintaining the engine’s temperature within optimal ranges. Proper coolant circulation is essential for preventing overheating and ensuring the engine operates efficiently.

Importance in Parts Distribution and Installation Kits

Finally, in Parts Distribution Center Kits and Engine Installation Kits, the Rectangular Ring Seal is often included as a standard component due to its widespread application across various engine systems. Its role in these kits underscores its importance in ensuring that all connections within the engine are sealed properly, facilitating a smooth and efficient engine installation process.

Conclusion

Overall, the Rectangular Ring Seal (part 3906695) is a versatile and indispensable component in engine systems, playing a key role in maintaining the integrity, efficiency, and safety of the engine’s operation.