4080404
Oil Seal
Cummins®

The Cummins 4080404 Oil Seal is a component designed to ensure the efficient operation of commercial trucks. Its role is to maintain the integrity of the lubrication system by preventing oil leakage and contamination, which are vital for the smooth functioning of the engine and transmission ¹.

Basic Concepts of Oil Seals

An oil seal, also known as a rotary shaft seal, is a mechanical device used in machinery to prevent the leakage of lubricants and to keep contaminants out. It operates by creating a barrier between the rotating shaft and the stationary housing, ensuring that lubricants remain within the system while external particles are kept out. This function is essential for maintaining the efficiency and longevity of mechanical components ².

Purpose of the 4080404 Oil Seal

The Cummins 4080404 Oil Seal is specifically designed to serve within the engine or transmission system of a truck. Its primary function is to seal the interface between rotating and stationary parts, such as shafts and housings, to prevent oil leakage. This seal helps maintain the proper lubrication levels required for the efficient operation of these components, thereby contributing to the overall performance and reliability of the truck ³.

Key Features

The Cummins 4080404 Oil Seal is constructed with high-quality materials that ensure durability and effectiveness. Its design includes a lip that contacts the shaft to create a seal, and it is often made from materials like nitrile rubber or fluorocarbon elastomers, which offer excellent resistance to oil and wear. The seal’s design also incorporates features that enhance its ability to withstand high temperatures and pressures, ensuring reliable performance in demanding environments.

Benefits

The use of the Cummins 4080404 Oil Seal offers several benefits. It contributes to improved engine efficiency by ensuring that lubrication is maintained at optimal levels. This reduces the need for frequent maintenance and enhances the overall performance and longevity of the truck. Additionally, by preventing oil leakage and contamination, the seal helps protect other components from wear and damage, further contributing to the truck’s reliability.

Installation Process

Installing the Cummins 4080404 Oil Seal requires careful attention to detail to ensure a secure fit. The process involves cleaning the sealing surface to remove any debris or old sealant, selecting the correct seal size, and using appropriate tools to install the seal without damaging it. Best practices include lubricating the seal lip before installation and ensuring that it is properly seated within the housing to achieve an effective seal.

Troubleshooting Common Issues

Common issues with oil seals include leaks and wear, which can arise from improper installation, contamination, or excessive wear and tear. Troubleshooting these problems involves inspecting the seal and its surrounding components for signs of damage or misalignment. Addressing these issues may require cleaning the sealing surface, replacing the seal, or adjusting the components to ensure proper fit and function.

Maintenance Tips

To ensure the longevity and optimal performance of the Cummins 4080404 Oil Seal, regular maintenance is recommended. This includes inspecting the seal during routine maintenance checks for signs of wear or damage, cleaning the sealing surface to prevent contamination, and replacing the seal as needed based on the manufacturer’s recommendations or signs of failure. Adhering to these maintenance practices helps maintain the seal’s effectiveness and contributes to the overall reliability of the truck.

Cummins Corporation

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration, and emission solutions. With a strong reputation in the commercial truck industry, Cummins is known for its commitment to quality, innovation, and customer satisfaction. The Cummins 4080404 Oil Seal, as part of their product range, reflects the company’s dedication to providing reliable and high-performance components for the automotive and heavy-duty truck sectors.

Cummins Engine Oil Seal 4080404 Compatibility

The Cummins Oil Seal part number 4080404 is designed to fit a variety of Cummins engines, ensuring a secure seal to prevent oil leaks and maintain engine efficiency. This oil seal is compatible with the following engines:

QSK45 CM500 and QSK60 CM500

Both the QSK45 CM500 and QSK60 CM500 engines benefit from the 4080404 oil seal. This seal is engineered to fit the specific dimensions and requirements of these engines, providing a reliable barrier against oil leakage.

QSK60 CM850 MCRS and QSK60G

The 4080404 oil seal is also suitable for the QSK60 CM850 MCRS and QSK60G engines. These engines, known for their robust performance, require high-quality seals to maintain their operational integrity. The oil seal ensures that the engine’s internal components remain protected from oil contamination and wear.

QSK78 CM500 and QSK95 CM2350 (K111 and K113)

The QSK78 CM500 engine, along with the QSK95 CM2350 engines in both K111 and K113 configurations, are also compatible with the 4080404 oil seal. This seal is designed to meet the stringent demands of these high-performance engines, ensuring optimal sealing and longevity.

By using the Cummins Oil Seal part number 4080404, engine operators can maintain the efficiency and reliability of their engines, preventing costly oil leaks and ensuring smooth operation.

Role of Part 4080404 Oil Seal in Engine Systems

The 4080404 Oil Seal is a vital component in maintaining the integrity and efficiency of various engine systems. Its primary function is to prevent oil leakage while allowing smooth operation of rotating or sliding parts within the engine.

Lower Accessory Gasket Set

In the lower accessory gasket set, the 4080404 Oil Seal ensures that oil does not escape from the accessory drive components. This is particularly important for maintaining proper lubrication and preventing contamination of other engine parts.

Lower Engine Gasket Set

Within the lower engine gasket set, the oil seal plays a significant role in sealing the crankshaft and other rotating components. This helps in retaining the necessary oil levels for lubrication, which is essential for the longevity and performance of the engine.

Oil Seal Kit

As part of an oil seal kit, the 4080404 Oil Seal is often used to replace worn-out seals during maintenance or repair procedures. Its inclusion in the kit ensures that technicians have the correct component to restore the engine’s sealing efficiency.

Pulley

When integrated with pulleys, the oil seal prevents oil from leaking out around the pulley’s rotating shaft. This is important for maintaining the pulley’s efficiency and ensuring that it operates without interference from oil.

Accessory Drive

In accessory drive systems, the oil seal helps to keep the drive components well-lubricated while preventing oil from escaping. This ensures that accessories like the alternator, power steering pump, and air conditioning compressor function smoothly.

Service Kit

In a service kit, the 4080404 Oil Seal is often included to address common wear and tear issues. Its presence in the kit allows for comprehensive maintenance, ensuring that all critical sealing points are addressed during an engine service.

Set

When part of a set, such as a lower accessory gasket set or engine gasket set, the oil seal contributes to the overall sealing strategy of the engine. This comprehensive approach helps in maintaining optimal engine performance and reliability.

Lower Accessory Gasket

Specifically, in the lower accessory gasket, the oil seal ensures that oil does not seep into areas where it could cause damage or reduce efficiency. This is vital for the proper functioning of lower accessories and the engine as a whole.

Conclusion

The Cummins 4080404 Oil Seal plays a crucial role in maintaining the efficiency and reliability of commercial truck engines. By preventing oil leakage and contamination, this part ensures optimal lubrication and protection of engine components. Regular maintenance and proper installation are key to maximizing the benefits of this Cummins part, contributing to the overall performance and longevity of the vehicle.