3922794
O Ring Seal
Cummins®

This article provides an overview of the Cummins 3922794 O Ring Seal, covering the basic concepts of O Ring Seals, their function in commercial trucks, key features, benefits, and maintenance suggestions.

Basic Concepts of O Ring Seals

An O Ring Seal is a mechanical gasket with a circular cross-section, designed to be seated in a groove and compressed during assembly between two or more parts, creating a seal at the interface. O Ring Seals are commonly used in applications where a reliable seal is required to prevent leakage of fluids or gases ¹.

Function of the 3922794 O Ring Seal in Trucks

The 3922794 O Ring Seal ensures the integrity of fluid systems within commercial trucks. It is used in various components such as fuel injectors, hydraulic systems, and engine parts to prevent leaks and maintain system efficiency. The seal helps in maintaining pressure and preventing contamination by external elements ².

Key Features

This Cummins part is designed with specific materials and dimensions to ensure optimal performance. Key features include its durable construction, resistance to various chemicals and temperatures, and precise fit within the designated grooves. These features contribute to its reliability and longevity in demanding truck applications ³.

Benefits

Using the 3922794 O Ring Seal offers several benefits. It provides a reliable seal that enhances the performance and efficiency of fluid systems. The seal’s durability reduces the need for frequent replacements, leading to cost savings. Additionally, it contributes to the overall safety and reliability of the truck by preventing leaks and maintaining system integrity.

Troubleshooting and Maintenance

Regular inspection of the 3922794 O Ring Seal is recommended to ensure it remains in good condition. Signs of wear, such as cracks or deformation, should be addressed promptly by replacing the seal. Proper installation techniques should be followed to ensure the seal is correctly seated and compressed. Maintenance of the surrounding components can also help prolong the life of the O Ring Seal.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. The company is known for its commitment to quality and innovation, providing reliable components for various industries, including commercial trucking.

Cummins Engine Part 3922794: O Ring Seal Application

The Cummins O Ring Seal part number 3922794 is a critical component designed to ensure the integrity of various engine systems. This seal is used across a range of Cummins engines, providing essential sealing functions that prevent leaks and maintain system pressures. Below is a detailed look at the engines where this O Ring Seal is applicable.

M104B Series Engines

• 15N CM2380 M104B
• 4B3.9
• 6B5.9
• 6C8.3

These engines, part of the M104B series, utilize the 3922794 O Ring Seal in various sealing applications, ensuring that critical components remain sealed and operational.

B Series Engines

• B3.3
• B4.5 CM2350
• B4.5 RGT
• B5.6 CM2670 B152B
• B5.9 CM2670 B166C
• B6.7 CM2350 B135B
• B6.7 CM2670 B153B
• B6.7 CM2670 B164C
• B6.7 G CMOH6.0 B125
• B6.7S

The B series engines, including the B3.3, B4.5, B5.6, B5.9, B6.7, and B6.7S variants, incorporate the 3922794 O Ring Seal in numerous sealing applications. This ensures the engines maintain their operational efficiency and reliability.

D Series Engines

• D4.0 CM2620 D103B

The D4.0 CM2620 D103B engine uses the 3922794 O Ring Seal to maintain the integrity of its sealing systems, preventing leaks and ensuring optimal performance.

F Series Engines

• F2.8 CM2620 F135B
• F3.8 CM2350 F120B
• F3.8 CM2350 F128C
• F3.8 CM2620 F137B
• F3.8 F102
• F4.5 CM2620 F139B
• F4.5 CM2620 F141C

The F series engines, including the F2.8, F3.8, and F4.5 variants, rely on the 3922794 O Ring Seal for critical sealing functions. This ensures that these engines operate with the necessary sealing integrity.

GTA38 Series Engines

• GTA38 G CMEICS G116C

The GTA38 G CMEICS G116C engine incorporates the 3922794 O Ring Seal to maintain its sealing integrity, ensuring reliable performance.

ISB Series Engines

• ISB (Chrysler)
• ISB CM2150

The ISB series engines, including the ISB (Chrysler) and ISB CM2150, use the 3922794 O Ring Seal in various sealing applications to maintain engine efficiency and reliability.

The Cummins O Ring Seal part number 3922794 is a versatile and essential component across a wide range of Cummins engines. Its application in these engines highlights its importance in maintaining the sealing integrity necessary for optimal engine performance.

Role of Part 3922794 O Ring Seal in Engine Systems

The 3922794 O Ring Seal is an essential component in various engine systems, ensuring the integrity and efficiency of fluid and gas pathways. Here’s how it integrates with several key components:

Aftercooler Gasket Kit

In the aftercooler gasket kit, the O ring seal ensures a tight seal between the aftercooler and its mounting surfaces. This prevents coolant leaks, maintaining efficient cooling of the compressed air before it enters the engine.

Aftermarket Turbocharger

For aftermarket turbochargers, the O ring seal is used in the turbocharger housing kit to seal the connections between the turbine and compressor housings. This ensures that exhaust gases are directed efficiently, enhancing turbocharger performance and durability.

Bracket Throttle Kit

In the bracket throttle kit, the O ring seal is employed to seal the connections between the throttle body and the intake manifold. This prevents air leaks, ensuring precise air-fuel mixture control and optimal engine performance.

Centinel Valve Kit

Within the centinel valve kit, the O ring seal is critical for sealing the valve’s connections to the fuel system. This maintains fuel pressure integrity and prevents leaks, which is vital for the reliable operation of the fuel injection system.

Cylinder Head

In the cylinder head, O ring seals are used in fuel injector cups to ensure a leak-free connection between the injector and the cylinder head. This maintains fuel pressure and prevents fuel from entering the combustion chamber prematurely.

Engine Control Module (ECM)

Although the ECM itself does not use O ring seals, the sensors and actuators connected to it often do. For instance, in fuel block elbows and the fuel right bank manifold, O ring seals ensure that electrical connections remain secure and free from contaminants.

Fuel System Components

In the fuel block elbows and fuel right bank manifold, O ring seals are used to maintain the integrity of fuel lines and connections. This ensures consistent fuel delivery and pressure, which is essential for engine performance.

Long Block Assembly - 50

In the long block assembly, O ring seals are utilized in various connections, such as the oil manifold and plumbing. These seals ensure that oil flows smoothly through the engine, lubricating moving parts and preventing leaks.

Lower Block Gasket Set

The lower block gasket set incorporates O ring seals to ensure a tight seal between the engine block and other components, such as the oil pump and front cover. This prevents oil leaks and maintains proper lubrication.

Plumbing and Manifolds

In exhaust recirculation water and fuel plumbing, O ring seals are used in tube connector tees and other fittings to ensure leak-free connections. This is vital for maintaining system pressure and efficiency.

Primer and Lubricating Systems

In the primer engine lubricating system and priming pump, O ring seals ensure that priming fluid is delivered without leaks, facilitating easy engine startup and reliable lubrication.

Service Coupling 2008 Assembly

In the service coupling 2008 assembly, O ring seals are used to ensure a secure connection between the coupling and the engine, preventing fluid leaks and maintaining system integrity.

Engine Cooling System

Within the engine cooling system, O ring seals are employed in the water pump and various coolant passages to ensure efficient coolant flow and prevent leaks, which is essential for maintaining optimal engine temperature.

Wiring Harness

Although the wiring harness itself does not use O ring seals, components connected to it, such as sensors in the XPI JV system Cummins MR, often do. These seals ensure that electrical connections remain secure and free from moisture and contaminants.

Oil Reserve System

In the oil reserve system, O ring seals are used in the connections between the oil reserve tank and the engine. This ensures that the engine receives a consistent supply of oil, even under extreme conditions.

By ensuring leak-free connections and maintaining system integrity, the 3922794 O ring seal plays a significant role in the reliable operation of these engine components.

Conclusion

The Cummins 3922794 O Ring Seal is a critical component in maintaining the integrity and efficiency of various engine systems in commercial trucks. Its durable construction, resistance to chemicals and temperatures, and precise fit make it a reliable choice for sealing applications. Regular maintenance and proper installation are essential to ensure its longevity and effectiveness in preventing leaks and maintaining system pressures.