3906697
Rectangular Ring Seal
Cummins®

The 3906697 Rectangular Ring Seal is a critical component manufactured by Cummins, designed for use in commercial trucks. This article provides an overview of this part, its function, key features, benefits, and maintenance suggestions.

Basic Concepts of Rectangular Ring Seals

A Rectangular Ring Seal is a type of gasket used to create a seal between two surfaces. It is typically made from elastomeric materials and is designed to withstand high pressures and temperatures. The seal works by deforming slightly when compressed, filling any irregularities between the mating surfaces to prevent leaks ¹.

Purpose of the 3906697 Rectangular Ring Seal

The 3906697 Rectangular Ring Seal ensures the integrity of fluid systems within commercial trucks. It is used in applications where a reliable seal is required to prevent fluid leakage, maintain system pressure, and ensure the efficient operation of the truck ².

Key Features

• Made from durable elastomeric materials
• Designed for high-pressure and high-temperature applications
• Rectangular shape allows for efficient sealing in compact spaces
• Compatible with a variety of fluid types commonly used in commercial trucks

Benefits

• Provides a reliable seal in demanding environments
• Helps maintain system pressure and efficiency
• Reduces the risk of fluid leaks, which can lead to system failures or contamination
• Enhances the overall performance and longevity of the truck’s fluid systems ³

Troubleshooting and Maintenance

Regular inspection of the Rectangular Ring Seal is recommended to ensure it remains in good condition. Signs of wear, such as cracks or deformation, should be addressed promptly. When replacing the seal, ensure the mating surfaces are clean and free of debris to maintain an effective seal. Following the manufacturer’s guidelines for installation and maintenance will help ensure the seal performs optimally ⁴.

Compatibility with Cummins Engines

This Cummins part is designed to fit a variety of Cummins engines, ensuring a tight seal to prevent oil leaks and maintain engine efficiency. Below are the engine models compatible with the 3906697 Rectangular Ring Seal:

Engines with 4B3.9, 6B5.9, and 6C8.3

The Rectangular Ring Seal fits seamlessly with the 4B3.9, 6B5.9, and 6C8.3 engines, providing a reliable seal that is crucial for maintaining engine performance and longevity.

Engines with B3.9 G, B4.5, and B5.6 CM2670 B152B

This seal is also compatible with the B3.9 G, B4.5, and B5.6 CM2670 B152B engines. It ensures that the engine operates smoothly by preventing oil from leaking out of the designated areas.

Engines with B4.5 RGT, B5.9 CM2670 B166C, and B5.9 GAS PLUS CM556

The part fits the B4.5 RGT, B5.9 CM2670 B166C, and B5.9 GAS PLUS CM556 engines, providing a critical seal that helps maintain the engine’s integrity and efficiency.

Engines with B6.7 CM2350 B135B, B6.7 CM2670 B153B, and B6.7 CM2670 B164C

The Rectangular Ring Seal is designed to fit the B6.7 CM2350 B135B, B6.7 CM2670 B153B, and B6.7 CM2670 B164C engines, ensuring a tight seal that is essential for the engine’s performance.

Engines with B6.7 G CMOH6.0 B125, B6.7S, G5.9, and G5.9 CM558

This seal is also compatible with the B6.7 G CMOH6.0 B125, B6.7S, G5.9, and G5.9 CM558 engines, providing a reliable seal that helps maintain the engine’s efficiency and longevity.

Engines with ISB (Chrysler), ISB CM2150, ISB CM550, and ISB CM850

The part fits the ISB (Chrysler), ISB CM2150, ISB CM550, and ISB CM850 engines, ensuring a tight seal that is crucial for the engine’s performance.

Engines with ISB/ISD4.5 CM2150 B119, ISB/ISD6.7 CM2150 SN, ISB3.9 CM2220 B107, and ISB5.9 CM2880 B110

The Rectangular Ring Seal is also compatible with the ISB/ISD4.5 CM2150 B119, ISB/ISD6.7 CM2150 SN, ISB3.9 CM2220 B107, and ISB5.9 CM2880 B110 engines, providing a critical seal that helps maintain the engine’s integrity and efficiency.

Role of Part 3906697 Rectangular Ring Seal in Engine Systems

The 3906697 Rectangular Ring Seal is an essential component in various engine systems, ensuring the integrity and efficiency of the engine’s operation. This seal is strategically positioned in several key areas to prevent leaks and maintain pressure, contributing to the overall performance and longevity of the engine.

Integration with Engine Components

1. Cylinder Block and Gasket Sets:

   • The 3906697 Rectangular Ring Seal works in conjunction with the cylinder block and full engine gasket sets to create a secure seal between mating surfaces. This prevents coolant, oil, and other fluids from leaking, ensuring that the engine operates within optimal parameters.

2. Thermostat Housing and Water Inlet:

   • In the thermostat housing and water inlet connection, the seal ensures that coolant flows smoothly without any leaks. This is vital for maintaining the engine’s temperature and preventing overheating.

3. Coolant Bypass Kit:

   • When integrated into the coolant bypass kit, the seal helps manage the flow of coolant around the engine, ensuring consistent temperature regulation and efficient operation.

4. Fuel Pump and Coupling:

   • In fuel systems, the seal is used in the fuel pump and coupling to maintain pressure and prevent fuel leaks. This is important for the engine’s fuel efficiency and performance.

5. Alternator Support and Mounting:

   • The seal is also employed in the alternator support and mounting areas to ensure that the alternator operates efficiently without any fluid interference.

6. Front Gear and Cover:

   • In the front gear and cover assembly, the seal prevents oil leaks, which is essential for the lubrication and smooth operation of the engine’s moving parts.

7. Overhaul and Rebuild Kits:

   • During engine overhauls or rebuilds, the 3906697 Rectangular Ring Seal is often included in overhaul and rebuild kits to ensure that all new components are properly sealed, contributing to the engine’s reliability post-repair.

8. Service and Seal Kits:

   • The seal is a common component in service and seal kits, used to replace worn-out seals during routine maintenance, thereby extending the engine’s service life.

Comprehensive Sealing Solution

The 3906697 Rectangular Ring Seal is a versatile component that enhances the functionality of various engine systems. Its role in preventing leaks and maintaining pressure is fundamental to the engine’s efficiency and durability. Whether in the cylinder block, thermostat housing, or fuel pump, this seal ensures that the engine components work harmoniously, leading to improved performance and reliability.

Conclusion

The 3906697 Rectangular Ring Seal is a vital component in the maintenance and efficiency of commercial truck engines. Its durable design, compatibility with various fluid types, and strategic placement in critical engine areas make it indispensable for preventing leaks and maintaining system pressure. Regular maintenance and prompt replacement of worn seals are essential practices to ensure the longevity and performance of the engine.

References