3347939
O Ring Seal
Cummins®

The 3347939 O Ring Seal is a component manufactured by Cummins, a well-established name in the commercial truck industry. This seal is specifically designed for use in commercial trucks, where it plays a vital role in ensuring the integrity of various systems within the vehicle.

Basic Concepts of O Ring Seals

O Ring Seals are circular rings, typically made from elastomers, that create a seal when compressed within a groove. Their general composition includes materials like nitrile, silicone, or fluorocarbon, chosen for their flexibility, resilience, and resistance to various chemicals and temperatures ¹. In sealing applications, O Ring Seals work by deforming slightly when compressed, which allows them to fill any irregularities in the mating surfaces and create a tight seal.

Role of the 3347939 O Ring Seal in Truck Operation

This Cummins part is positioned in specific areas within a truck’s systems where sealing is required to prevent leaks and ensure efficient operation. Its placement is critical in areas where fluids or gases need to be contained, such as in fuel systems, hydraulic systems, or engine components. The seal functions by creating a barrier that prevents the escape of fluids or gases, thereby maintaining system pressure and efficiency.

Key Features

The 3347939 O Ring Seal is characterized by its material composition, which is selected for its durability and resistance to the operating conditions it will encounter. The design specifications of this seal include precise dimensions to ensure a proper fit within the designated grooves. Unique characteristics may include enhanced resistance to specific chemicals or temperatures, depending on the application requirements.

Benefits

This part offers several benefits, including improved sealing efficiency due to its precise design and material properties. Its durability ensures long-term performance, even under challenging conditions. Additionally, the seal’s resistance to various operating conditions, such as extreme temperatures or exposure to chemicals, contributes to the overall reliability of the truck’s systems.

Troubleshooting and Maintenance

Common issues with the 3347939 O Ring Seal may include wear, deformation, or failure due to exposure to incompatible fluids or excessive temperatures. Troubleshooting steps involve inspecting the seal for signs of damage, ensuring proper installation, and verifying that the seal is compatible with the fluids and operating conditions it encounters. Maintenance practices to ensure longevity and proper function include regular inspection, timely replacement when signs of wear are detected, and ensuring that the seal is installed correctly to avoid unnecessary stress or deformation.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration systems, and related components. With a history spanning over a century, Cummins has established a reputation for quality, innovation, and reliability in the commercial truck industry. Their product range includes engines, powertrain components, and aftermarket parts, all designed to meet the demanding requirements of commercial vehicles.

Compatibility of 3347939 with Cummins Engines

This Cummins part is designed to fit a variety of Cummins engines. This seal is essential for maintaining the integrity of the engine’s sealing systems, ensuring that there are no leaks and that the engine operates efficiently.

ISX Series Engines

The ISX series engines, including the ISX CM570, ISX CM870, ISX CM871, ISX12 CM2350 X102, ISX12/ISX11.9 CM2250, ISX15 CM2250, ISX15 CM2250 SN, and ISX15 CM2350 X101, all utilize the 3347939 O Ring Seal. This seal is crucial for these engines as it helps in sealing various components, ensuring that there are no leaks and that the engine maintains optimal performance.

ISL Series Engines

The ISL9 CM2150 SN and ISL9.5 CM2880 L138 engines also incorporate the 3347939 O Ring Seal. This seal is vital for maintaining the sealing integrity of these engines, ensuring that they operate efficiently and without leaks.

ISZ Series Engines

The ISZ13 CM2150 Z105 engine is another model that uses the 3347939 O Ring Seal. This seal is essential for maintaining the sealing systems of the engine, ensuring that it operates efficiently and without leaks.

QSK Series Engines

The QSK19 CM500, QSK19G, QSK45 CM500, QSK60 CM500, QSK60G, and QSK78 CM500 engines all require the 3347939 O Ring Seal. This seal is crucial for maintaining the sealing integrity of these engines, ensuring that they operate efficiently and without leaks.

QSL Series Engines

The QSL9 CM850 (CM2850) engine also utilizes the 3347939 O Ring Seal. This seal is essential for maintaining the sealing systems of the engine, ensuring that it operates efficiently and without leaks.

QSX Series Engines

The QSX11.9 CM2250 ECF, QSX15 CM2250, and QSX15 CM2250 ECF engines are designed to use the 3347939 O Ring Seal. This seal is crucial for maintaining the sealing integrity of these engines, ensuring that they operate efficiently and without leaks.

By ensuring that the 3347939 O Ring Seal is properly installed and maintained, engine operators can help ensure that their engines run smoothly and efficiently, minimizing the risk of leaks and other issues.

Role of 3347939 O Ring Seal in Engine Systems

The 3347939 O Ring Seal is an essential component in ensuring the integrity and efficiency of various engine systems. Its application spans across multiple critical areas, providing reliable sealing solutions that prevent leaks and maintain system performance.

Fuel System Integration

In the fuel system, the O Ring Seal is utilized in the fuel pump assembly and fuel pump kit to create a tight seal between moving parts and stationary components. This ensures that fuel is delivered under precise pressure without any leakage, which is vital for the engine’s performance and efficiency ¹. Additionally, within the fuel manifold and injector plumbing, the O Ring Seal helps maintain consistent fuel flow and pressure, contributing to optimal combustion and reduced emissions.

Combustion and Leak Testing

When it comes to combustion leak testing, the O Ring Seal plays a significant role in the combustion leak tester and leak test adapter. It ensures that the testing environment is sealed properly, allowing for accurate readings and reliable diagnostics. This is particularly important in identifying potential issues within the engine piston and head gasket set, where even minor leaks can lead to significant performance drops or engine damage ².

Injector and Gasket Applications

The O Ring Seal is also integral in the injector barrel and injector oil seal kit, where it prevents fuel or oil leakage around the injector components. This is essential for maintaining the precise fuel-air mixture required for efficient combustion. Furthermore, in gasket coupling 2009 kit and oversize gasket kit, the O Ring Seal enhances the sealing capability, ensuring that there are no gaps or leaks that could compromise engine performance.

Service and Performance Enhancements

In service applications such as the service coupling 2008 assembly, service coupling 2009 assembly, and service coupling 2009 assembly, the O Ring Seal ensures that connections remain secure during maintenance or upgrades. This is particularly important in high-performance engines where even the smallest leak can affect overall efficiency.

For performance parts and alternative design components, the O Ring Seal provides the necessary sealing to support enhanced engine capabilities, ensuring that modifications do not introduce new points of failure.

XPI JV Systems

In the XPI JV system Cummins HD, XPI JV system Cummins MR, and XPI JV system Scania HD, the O Ring Seal is used to maintain the integrity of the high-pressure fuel lines and injectors. This is crucial for the precise delivery of fuel in these advanced systems, where any leakage can lead to decreased performance and increased wear on components.

Top Level and Short Block Applications

Finally, in the top level assembly injector assembly and short block kit, the O Ring Seal ensures that all critical junctions are sealed, preventing any internal leaks that could affect the engine’s overall functionality. This is especially important in the short block, where maintaining a sealed environment is essential for the longevity and reliability of the engine.

Conclusion

Overall, the 3347939 O Ring Seal is a versatile and indispensable component across various engine systems, ensuring that seals remain intact and systems operate efficiently. Proper installation and maintenance of this part are crucial for the optimal performance and longevity of Cummins engines.