3867043
O Ring Seal
Cummins®

The 3867043 O Ring Seal, a component manufactured by Cummins, is designed for use in commercial trucks. This article provides an overview of the O Ring Seal, its function, key features, benefits, and maintenance suggestions.

Understanding O Ring Seals

An O Ring Seal is a type of gasket consisting of a jointless ring of elastomer with a round cross-section. It is used to create a seal between two or more parts. The seal works by being compressed between flanges or in a groove, creating a barrier that prevents the leakage of fluids or gases ¹.

Role of the 3867043 O Ring Seal in Truck Operation

This Cummins part plays a role in maintaining the integrity of fluid systems within a truck. It is used in various applications where sealing is required to prevent leaks, ensuring the efficient operation of the truck’s systems.

Key Features

• Made from durable elastomer materials to withstand high pressure and temperature.
• Designed for a snug fit in specified grooves to ensure effective sealing.
• Compatible with a variety of fluids commonly used in truck systems.

Benefits

• Enhances the reliability of fluid systems by preventing leaks.
• Contributes to the longevity of truck components by maintaining system integrity.
• Easy to install and replace, minimizing downtime during maintenance.

Troubleshooting and Maintenance

Regular inspection of the O Ring Seal is recommended to identify any signs of wear or damage. If a seal shows signs of degradation, such as cracking or hardening, it should be replaced to maintain system efficiency. Proper lubrication and adherence to manufacturer guidelines can extend the life of the seal ².

Cummins Engine Compatibility

This O Ring Seal is compatible with a wide range of Cummins engines, including the B6.7 CM2350 B135B, ISC CM554, ISL CM554, K19, K38, K50, L10 MECHANICAL, M11 CELECT PLUS, M11 MECHANICAL, N14 MECHANICAL, NH/NT 855, QSB6.7 CM2350 B105, QSC8.3 CM554, QSL9 CM554, V28, V903, X12 CM2350 X119B, X15 CM2350 X116B, X15 CM2350 X123B, and X15 CM2450 X134B. In these engines, 3867043 ensures the integrity and efficiency of various engine components by preventing leaks and maintaining system pressure.

Role of 3867043 in Engine Systems

Fuel System Components

In the fuel injection pump and fuel pump, the O Ring Seal is positioned to create a tight seal between moving parts and stationary components. This prevents fuel leakage, which is essential for maintaining fuel pressure and ensuring efficient fuel delivery to the engine.

The fuel pump gasket set often incorporates O Ring Seals to seal the connections between the fuel pump and the engine block or fuel lines. This is vital for preventing fuel leaks and ensuring that the fuel system operates under the correct pressure.

Valve and Shutoff Mechanisms

For the fuel shutoff valve and solenoid valve, the O Ring Seal plays a key role in ensuring that these valves can open and close without allowing fuel to escape. This is particularly important in systems where precise control over fuel flow is necessary for engine performance and safety.

In the fuel valve assembly and fuel valve mounting, O Ring Seals are used to ensure that the valve components are securely sealed, preventing any fuel from leaking out and ensuring that the valve operates smoothly.

Turbocharger and Coolant Systems

In turbocharger plumbing and turbocharger coolant plumbing, O Ring Seals are employed to maintain the integrity of the fluid pathways. For the turbocharger, this means ensuring that the lubricating oil remains contained, while for the coolant system, it involves keeping the coolant within the lines to prevent overheating and system failure.

Pressure Regulation and Accumulators

The pressure regulator valve relies on O Ring Seals to maintain consistent pressure within the fuel system. Any leakage could result in inconsistent fuel pressure, affecting engine performance.

In the accumulator, O Ring Seals are used to maintain the seal between the accumulator body and its various ports. This ensures that the accumulator can effectively store and release hydraulic fluid as needed, contributing to the stability and responsiveness of the engine’s hydraulic systems.

Miscellaneous Components

In components like the cam housing module and overhaul kit, O Ring Seals are often included to ensure that all connections within these assemblies are leak-proof. This is essential for the longevity and reliability of the engine.

The flywheel and its associated mounting components may also utilize O Ring Seals in fluid passages to ensure that any lubricants used are effectively contained, reducing friction and wear on moving parts.

Conclusion

The 3867043 O Ring Seal is a small but significant component in ensuring the efficient and safe operation of various engine systems. Its durability, compatibility with various fluids, and ease of installation make it a critical part in maintaining the integrity of truck and engine systems.