3347937
O Ring Seal
Cummins®

Introduction to O Ring Seals

O ring seals are critical components in various mechanical systems, especially in commercial truck engines. These seals are designed to prevent the leakage of fluids and gases by forming a tight seal between two surfaces. Their flexibility and resilience make them ideal for applications where components may experience movement or vibration ¹.

How an O Ring Seal Works

An O ring seal functions by deforming to fit into a groove and then returning to its original shape once pressure is applied. This deformation creates a barrier that effectively prevents the passage of fluids or gases. The seal’s material, usually made from rubber or synthetic elastomers, must be compatible with the substances it will encounter to ensure durability and effectiveness ².

Purpose of the Cummins 3347937 O Ring Seal

The Cummins 3347937 O ring seal is specifically engineered for use in commercial truck engines. Its primary function is to ensure that critical components, such as fuel injectors, hydraulic systems, and other fluid pathways, remain sealed. This seal is crucial for maintaining engine efficiency, preventing contamination, and ensuring the longevity of engine parts ³.

Role in Truck Operations

In the realm of truck operations, the 3347937 O ring seal plays a pivotal role in maintaining the integrity of the engine’s fluid systems. By preventing leaks, it helps to sustain optimal engine performance, reduces the risk of engine damage, and ensures that the truck remains operational without unexpected downtime.

Troubleshooting and Maintenance

Proper maintenance of the 3347937 O ring seal is essential for its longevity and effectiveness. Regular inspections should be conducted to check for signs of wear, such as cracks, deformation, or hardening. If any of these issues are detected, the O ring seal should be replaced promptly to prevent leaks and potential engine damage.

Maintenance Tips:

• Inspect the O ring seal regularly for signs of wear.
• Ensure that the seal is properly seated in its groove.
• Avoid using chemicals that can degrade the seal’s material.
• Replace the seal if it shows any signs of damage or degradation.

Cummins: A Leader in Engine Technology

Cummins is a distinguished manufacturer of engines and related components for commercial trucks. With a legacy of innovation and reliability, Cummins products are trusted by engineers, mechanics, and fleet operators worldwide. The company’s dedication to quality and performance ensures that its O ring seals, including the 3347937, meet the highest standards for durability and effectiveness.

Compatibility with Cummins Engines

This Cummins part is designed to fit a variety of Cummins engines. Below is a detailed breakdown of the engines with which this O Ring Seal is compatible:

ISB Series Engines

• ISB CM2150
• ISB CM850
• ISB/ISD6.7 CM2150 SN
• ISB6.7 CM2250
• ISB6.7 CM2350 B101
• ISB6.7 G CM2180 B118
• ISBE CM2150
• ISBE4 CM850

ISX Series Engines

• ISX CM570
• ISX CM870
• ISX CM871

QSB Series Engines

• QSB4.5 CM850 (CM2850)
• QSB6.7 CM850 (CM2850)

QSK Series Engines

• QSK19 CM500
• QSK19G
• QSK45 CM500
• QSK60 CM500
• QSK60G
• QSK78 CM500

This part is engineered to provide a reliable seal in these engines, ensuring optimal performance and longevity. Its compatibility across multiple engine series highlights its versatility and importance in maintaining engine efficiency.

Role of 3347937 O Ring Seal in Engine Systems

The O Ring Seal, identified by part number 3347937, is integral to the functionality and efficiency of various engine components. Its application spans across multiple systems, ensuring optimal performance and reliability.

Aftercooler

In the aftercooler system, the O Ring Seal is used to create a tight seal between the cooler and its housing. This ensures that the compressed air is effectively cooled without any leaks, maintaining the efficiency of the cooling process.

Fuel Manifold and Fuel Pump

Within the fuel manifold and fuel pump, the O Ring Seal plays a key role in preventing fuel leaks. It ensures that the fuel system remains pressurized, which is essential for consistent fuel delivery to the injectors.

Injector Kit and Injector Plumbing

For the injector kit and injector plumbing, the O Ring Seal is vital in maintaining the integrity of the fuel lines. It prevents fuel from escaping, ensuring that the injectors receive a consistent fuel supply for precise combustion.

Cylinder Head Gasket Kit and Single Head Gasket Set

In the cylinder head gasket kit and single head gasket set, the O Ring Seal is used to ensure a secure seal between the cylinder head and the engine block. This prevents coolant and combustion gases from mixing, which is essential for engine performance and longevity.

Upper Engine Gasket Kit and Oversize Gasket Kit

The O Ring Seal is also employed in the upper engine gasket kit and oversize gasket kit to seal various components within the upper engine assembly. This includes sealing around sensors and other critical components, ensuring they function correctly without leaks.

Quadrant Cylinder Hardware Gasket Set and Quad OVRSZ Cyl HD GSK

In the quadrant cylinder hardware gasket set and quad oversize cylinder head gasket, the O Ring Seal is used to maintain the seal around the cylinder components. This is important for preventing leaks and ensuring the cylinders operate efficiently.

Service Coupling 2009 Assembly

The service coupling 2009 assembly utilizes the O Ring Seal to ensure a secure connection between service points. This is crucial for maintenance procedures, allowing for safe and effective servicing of the engine components.

Water Sensor

The water sensor system incorporates the O Ring Seal to ensure accurate readings by preventing water from leaking around the sensor. This is important for monitoring engine temperature and ensuring the engine operates within safe parameters.

Leak Test Adapter and Cylinder Head Leak Test Kit

In the leak test adapter and cylinder head leak test kit, the O Ring Seal is used to create a sealed environment for testing. This allows for accurate detection of leaks in the cylinder head and other components, facilitating effective diagnosis and repair.

Kit Overhaul and Overhaul Conversion Kit

During engine overhauls, the O Ring Seal is a common component in kit overhaul and overhaul conversion kits. It ensures that all new and replaced components are properly sealed, contributing to the overall success of the overhaul process.

Injectors and Alternative Design

For injectors and alternative design components, the O Ring Seal is used to maintain the seal around the injector body. This ensures that fuel is delivered accurately and efficiently, contributing to the engine’s performance and fuel economy.

Parts Performance

Overall, the consistent use of the O Ring Seal across various engine components highlights its importance in maintaining parts performance. By ensuring seals are tight and leaks are minimized, the O Ring Seal contributes to the reliability and efficiency of the engine system.

Conclusion

The Cummins 3347937 O ring seal is a vital component in commercial truck engines, ensuring that fluid systems remain sealed and operational. Understanding its purpose, proper maintenance, and the importance of regular inspections can help engineers, mechanics, and fleet operators maintain the integrity of their engines and reduce the risk of unexpected downtime.