3903475
Rectangular Ring Seal
Cummins®

This article provides an in-depth overview of the Rectangular Ring Seal, part #3903475, manufactured by Cummins. It explores the basic concepts, purpose, and role of this Cummins part in the operation of commercial trucks.

Basic Concepts of Rectangular Ring Seals

A Rectangular Ring Seal is a type of gasket designed to create a tight seal between two surfaces. Constructed from materials that can withstand high pressure and temperature, it ensures a reliable seal in demanding environments. The seal operates on the principle of compression, where the ring is compressed between two flanges to create a barrier that prevents fluid or gas leakage. Common materials used in the construction of these seals include elastomers, rubber, and synthetic compounds, each chosen for their specific properties such as flexibility, durability, and resistance to various chemicals ⁴.

Purpose and Role in Truck Operation

The Rectangular Ring Seal part #3903475 plays a crucial role in the operation of commercial trucks by ensuring the integrity of fluid systems. It is designed to prevent leaks in connections where fluids or gases are transferred under pressure. By maintaining a secure seal, it contributes to the overall efficiency and reliability of the truck’s systems, ensuring that fluids remain contained within their intended pathways and do not escape, which could lead to system failure or inefficiency ¹.

Key Features

The Rectangular Ring Seal part #3903475 is characterized by its robust design and material properties. It is made from high-quality materials that offer excellent resistance to wear and tear, as well as compatibility with a variety of fluids and operating conditions found in commercial trucks. Its unique characteristics include a rectangular cross-section that provides a larger sealing surface area compared to traditional O-rings, enhancing its sealing capabilities in high-pressure applications ².

Benefits

Using the Rectangular Ring Seal part #3903475 offers several advantages. It provides improved sealing performance, ensuring that systems operate efficiently without leaks. Its durability and resistance to wear and tear contribute to its longevity, reducing the need for frequent replacements. Additionally, its compatibility with various systems in commercial trucks makes it a versatile component for maintaining system integrity across different applications ³.

Troubleshooting and Maintenance

To ensure the optimal performance and longevity of the Rectangular Ring Seal part #3903475, it is important to follow proper maintenance practices. This includes regularly inspecting the seal for signs of wear or damage, such as cracks or deformations, and replacing it as necessary. Proper installation procedures are also crucial to avoid damaging the seal or compromising its sealing capabilities. Maintenance practices should include cleaning the sealing surfaces before installation and ensuring that the seal is correctly positioned and compressed to achieve the desired seal ⁴.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and a reputation for producing high-quality components, Cummins is committed to advancing the technologies that power the world. The company’s dedication to quality and performance is evident in its wide range of automotive and industrial products, including the Rectangular Ring Seal part #3903475.

Rectangular Ring Seal (Part 3903475) Compatibility with Cummins Engines

The Rectangular Ring Seal, identified by part number 3903475, is a crucial component in various Cummins engines. This seal is designed to ensure optimal performance by preventing leaks and maintaining pressure integrity within the engine’s system. Below is a detailed overview of the engines with which this part is compatible:

4B3.9 and 6B5.9 Engines

The Rectangular Ring Seal is compatible with the 4B3.9 and 6B5.9 engines, which are part of the Cummins B-Series engines. These engines are known for their robust design and reliability, often used in heavy-duty applications.

6C8.3 and C8.3 G Engines

This seal fits seamlessly with the 6C8.3 and C8.3 G engines. These engines are typically used in medium-duty applications, providing a balance between power and efficiency.

B3.9 G, B4.5, B5.6, B5.9, B5.9 G, and B5.9 GAS PLUS CM556 Engines

The Rectangular Ring Seal is also compatible with the B3.9 G, B4.5, B5.6, B5.9, B5.9 G, and B5.9 GAS PLUS CM556 engines. These engines are part of the Cummins B-Series and are widely used in various applications due to their versatility and performance.

B5.9 CM2670 B152B and B5.9 CM2670 B166C Engines

The seal is designed to fit the B5.9 CM2670 B152B and B5.9 CM2670 B166C engines. These engines are known for their high performance and are often used in demanding applications.

B6.7 CM2670 B153B Engine

The Rectangular Ring Seal is also compatible with the B6.7 CM2670 B153B engine, which is part of the Cummins B-Series and is known for its power and efficiency.

C GAS PLUS CM556 and GTA8.3 CM558 Engines

This seal fits the C GAS PLUS CM556 and GTA8.3 CM558 engines. These engines are designed for high-performance applications, providing the necessary power and reliability.

G5.9, G5.9 CM558, G8.3, G8.3 CM558, and ISB CM550 Engines

The Rectangular Ring Seal is compatible with the G5.9, G5.9 CM558, G8.3, G8.3 CM558, and ISB CM550 engines. These engines are known for their durability and are used in a variety of applications.

ISB3.9 CM2220 B107, ISB5.9 CM2880 B110, ISB5.9 CM2880 B127, ISB5.9 CM2880 B140, ISB5.9 CM2880 B149, ISB5.9G CM2180, and ISC CM2150 Engines

Lastly, the seal fits the ISB3.9 CM2220 B107, ISB5.9 CM2880 B110, ISB5.9 CM2880 B127, ISB5.9 CM2880 B140, ISB5.9 CM2880 B149, ISB5.9G CM2180, and ISC CM2150 engines. These engines are part of the Cummins ISB and ISC series, known for their reliability and performance in various applications.

Role of Part 3903475 Rectangular Ring Seal in Engine Systems

The Rectangular Ring Seal, identified by part number 3903475, is integral to the assembly and functionality of various engine components. Its primary role is to ensure a secure and leak-proof seal between mating surfaces, which is essential for maintaining the integrity of the engine’s systems.

Integration with Specific Components

1. Breather Housing: The seal is used to connect the breather housing to the cylinder block, ensuring that any pressure fluctuations within the crankcase are managed effectively without leaks.

2. Cylinder Block: When interfacing with the cylinder block, particularly in short block assemblies, the Rectangular Ring Seal prevents oil and coolant leakage, preserving the engine’s lubrication and cooling efficiency.

3. Front Gear Cover and Front Gear Housing: These components often require precise sealing to prevent oil escape and contamination. The Rectangular Ring Seal fits snugly, ensuring that the gear cover and housing remain sealed against the cylinder block or other adjacent parts.

4. Fuel Pump Coupling: In systems where the fuel pump is coupled directly to the engine, the seal ensures that no fuel leaks occur at the connection point, maintaining fuel system integrity and safety.

5. Full Engine Gasket Set and Lower/Upper Engine Gasket Kits: The seal complements these gasket sets by providing additional sealing where standard gaskets may not suffice, particularly in areas subjected to high pressure or movement.

6. Hand Hole Cover: Often used for accessing internal engine components, the hand hole cover requires a reliable seal to prevent contaminants from entering the engine. The Rectangular Ring Seal achieves this by creating a tight seal around the cover’s perimeter.

7. Mechanical Tachometer Drive Kit: Ensuring accurate engine RPM readings requires a sealed connection between the tachometer drive and the engine. The seal prevents oil leaks that could interfere with the tachometer’s operation.

8. Oil Fill Arrangement: A secure seal around the oil fill cap or arrangement is vital for maintaining oil levels and preventing spills. The Rectangular Ring Seal provides this necessary seal, ensuring the oil fill process is clean and efficient.

9. Rebuild Kit and Seal Kit: These kits often include the Rectangular Ring Seal as a component to ensure that during an engine rebuild, all critical sealing points are addressed, enhancing the rebuild’s durability and performance.

10. Signal Generating Device: In engines equipped with electronic monitoring systems, the seal ensures that the signal generating device, which may be in contact with moving parts or fluids, remains sealed and functions accurately.

By effectively sealing these various engine components, the Rectangular Ring Seal plays a significant role in the overall performance, durability, and safety of the engine system.

Conclusion

The Rectangular Ring Seal part #3903475 is a critical component in the operation of commercial trucks and various Cummins engines. Its robust design, material properties, and compatibility with a wide range of applications make it an essential part for maintaining system integrity and efficiency. Proper maintenance and installation practices are crucial to ensure its optimal performance and longevity.