3679933
O-Ring Seal
Cummins®

The Cummins 3679933 O-Ring Seal is a critical component designed to maintain the integrity of seals within heavy-duty truck systems. Its primary function is to prevent leaks and ensure system efficiency, contributing significantly to the reliability and performance of the truck’s mechanical systems.

Basic Concepts of O-Ring Seals

An O-Ring Seal is a circular ring made from elastomer materials, designed to create a seal between two or more parts. It functions by deforming under compression to fill the gap between mating surfaces, thereby preventing the passage of fluids or gases. O-Rings are widely used in mechanical systems for their simplicity, effectiveness, and versatility. Common materials for O-Rings include nitrile rubber, silicone, and fluorocarbon, each offering different properties such as temperature resistance, chemical compatibility, and durability ¹.

Role of the 3679933 O-Ring Seal in Truck Operation

This Cummins part is specifically designed to ensure the sealing integrity of various systems or components within trucks. It is associated with fuel systems, hydraulic systems, and engine components, contributing to their functionality by preventing leaks and maintaining pressure. The seal’s proper function is integral to the efficient operation of these systems, ensuring that fluids and gases remain contained within their intended pathways ².

Key Features of the 3679933 O-Ring Seal

The 3679933 O-Ring Seal is characterized by its design and material composition, which enhance its performance and durability. It is made from a material that offers resistance to the operating conditions it is likely to encounter, such as high temperatures, pressure variations, and exposure to chemicals. Its design ensures a snug fit in the application, providing a reliable seal. Unique characteristics may include specific durometer ratings for optimal elasticity and compression set resistance, ensuring long-term performance ³.

Benefits of Using the 3679933 O-Ring Seal

Incorporating this part into truck maintenance offers several benefits. It provides improved sealing efficiency, which is crucial for maintaining system pressure and preventing leaks. The seal’s longevity ensures that it can withstand the rigors of heavy-duty truck operation, reducing the frequency of replacements. Additionally, its resistance to various operating conditions enhances the reliability of the truck’s systems, contributing to overall vehicle performance ⁴.

Installation and Maintenance Guidelines

Proper installation of the 3679933 O-Ring Seal is vital for ensuring optimal performance. It should be installed in a clean, undamaged groove to prevent damage to the seal and ensure a proper fit. Lubricating the seal during installation can facilitate its seating and reduce the risk of damage. Maintenance tips to prolong the life of the seal include regular inspection for signs of wear or damage, ensuring that mating surfaces remain clean and undamaged, and replacing the seal according to the manufacturer’s recommendations or when signs of failure are observed.

Troubleshooting Common Issues

Common problems associated with O-Ring Seals, such as leaks or failures, can often be traced to installation errors, material incompatibilities, or excessive wear. Troubleshooting steps include inspecting the seal and mating surfaces for damage, ensuring proper installation techniques were used, and verifying that the seal material is compatible with the operating conditions and fluids it contacts. When diagnosing issues, it is important to consider the seal’s age and exposure to operating conditions, as these factors can influence its performance and longevity.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and quality, Cummins has established a strong reputation in the heavy-duty truck industry. The company’s commitment to quality and innovation is evident in its wide range of products, designed to meet the demanding requirements of heavy-duty applications. Cummins’ dedication to excellence ensures that its components, including the 3679933 O-Ring Seal, are engineered to deliver reliable performance and durability in challenging environments.

O-Ring Seal Part 3679933 Compatibility with Cummins Engines

The O-Ring Seal part number 3679933, manufactured by Cummins, is designed to fit a variety of Cummins engines. This seal is crucial 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

• ISX CM570
• ISX CM870
• ISX CM871

The ISX series engines, including the ISX CM570, ISX CM870, and ISX CM871, are equipped with the O-Ring Seal part 3679933. This seal is integral to the engine’s performance, providing a reliable barrier against oil and fluid leaks.

ISX15 Series Engines

• ISX15 CM2250
• ISX15 CM2250 SN
• ISX15 CM2350 X101

The ISX15 series engines, such as the ISX15 CM2250, ISX15 CM2250 SN, and ISX15 CM2350 X101, also utilize the O-Ring Seal part 3679933. This seal ensures that the engine’s internal components remain sealed, preventing any potential contamination or loss of lubrication.

QSX15 Series Engines

• QSX15 CM2250
• QSX15 CM2250 ECF
• QSX15 CM2350 X105

The QSX15 series engines, including the QSX15 CM2250, QSX15 CM2250 ECF, and QSX15 CM2350 X105, are compatible with the O-Ring Seal part 3679933. This seal plays a critical role in maintaining the engine’s sealing integrity, ensuring that it operates smoothly and efficiently.

X15 Series Engines

• X15 CM2350 X116B
• X15 CM2350 X123B
• X15 CM2450 X134B

The X15 series engines, such as the X15 CM2350 X116B, X15 CM2350 X123B, and X15 CM2450 X134B, also incorporate the O-Ring Seal part 3679933. This seal is essential for preventing leaks and ensuring that the engine’s sealing systems function as intended.

Role of Part 3679933 O-Ring Seal in Engine Systems

The Part 3679933 O-Ring Seal is instrumental in maintaining the integrity and efficiency of various engine systems. Its application spans across multiple components, ensuring optimal performance and longevity of the engine.

Integration with Key Engine Components

• Camshaft: The O-Ring Seal is used to prevent oil leaks around the camshaft, ensuring that lubrication is maintained without contamination or loss of oil.

• Cylinder Block: In the cylinder block, the O-Ring Seal is employed to create a tight seal between moving parts, reducing the risk of oil or coolant leaks which could compromise engine performance.

• Head Gasket Set: When installed with a head gasket set, the O-Ring Seal helps in maintaining the seal between the cylinder head and the engine block, preventing coolant or oil from entering the combustion chamber.

• Injector: For fuel injectors, the O-Ring Seal is vital in ensuring that fuel delivery is precise and leak-free, which is essential for engine efficiency and emissions control.

• Kit Overhaul: During an engine overhaul, the O-Ring Seal is a common replacement part to ensure all seals are intact, promoting a smooth and efficient rebuild process.

• Lower Engine Gasket Kit: In lower engine gasket kits, the O-Ring Seal is used to seal various passages and connections, ensuring that lower end components operate without leaks.

• Mounting Spacer: When used with mounting spacers, the O-Ring Seal ensures that components are properly aligned and sealed, preventing any fluid leaks that could affect engine operation.

• Overhaul Conversion Kit: In conversion kits, the O-Ring Seal is often included to adapt new components to the existing engine, ensuring compatibility and sealing integrity.

• Overhaul Kit: Comprehensive overhaul kits include the O-Ring Seal to replace worn or damaged seals, contributing to the overall reliability of the engine post-overhaul.

• Performance Parts: For performance enhancements, the O-Ring Seal is used to maintain seals in high-stress areas, ensuring that modifications do not lead to leaks or reduced performance.

• Upper Engine Gasket Kit: In upper engine gasket kits, the O-Ring Seal is crucial for sealing components above the cylinder block, such as the valve cover and intake manifold.

• Upper Engine Gasket Set: Similar to the upper engine gasket kit, the O-Ring Seal in an upper engine gasket set ensures that all upper components are properly sealed, preventing oil or coolant leaks.

Conclusion

The Cummins 3679933 O-Ring Seal plays a vital role in the maintenance and operation of heavy-duty trucks by ensuring the integrity of seals within various systems. Its design and material composition are tailored to withstand the demanding conditions of truck operation, contributing to the reliability and efficiency of the vehicle. Proper installation and maintenance of this part are essential for maximizing its benefits and ensuring the longevity of the truck’s mechanical systems.