4947071
Oil Seal
Cummins®

Understanding Cummins Part #4947071: An Oil Seal for Commercial Truck Engines

Introduction to Oil Seals

Oil seals are critical components in the operation of commercial truck engines. They prevent oil leaks, which can lead to engine damage and decreased performance. Understanding the function and importance of oil seals is essential for engineers, mechanics, truck drivers, and fleet operators.

Basic Concepts of Oil Seals

Oil seals, also known as shaft seals, are designed to prevent the leakage of oil from the engine while allowing the shaft to rotate. They are typically made from materials such as rubber, nitrile, or fluorocarbon, which provide durability and resistance to high temperatures and pressures. The primary function of an oil seal is to maintain the integrity of the lubrication system by keeping oil where it is needed and contaminants out ¹.

Purpose of Cummins Part #4947071 Oil Seal

The Cummins part #4947071 oil seal is specifically designed for use in commercial truck engines. This oil seal plays a crucial role in maintaining engine efficiency and longevity by preventing oil leaks at critical points, such as where the crankshaft meets the engine block or where the transmission connects to the engine.

Role of the 4947071 Oil Seal in Truck Operations

In the operation of a commercial truck, the 4947071 oil seal ensures that the engine operates smoothly and efficiently. By preventing oil leaks, it helps maintain proper lubrication levels, which are essential for reducing friction and wear on engine components. This seal also helps in maintaining the cleanliness of the engine by keeping contaminants out, thereby extending the life of the engine and reducing maintenance costs ².

Troubleshooting and Maintenance

Regular inspection and maintenance of the 4947071 oil seal are crucial for preventing unexpected failures. Here are some troubleshooting tips and maintenance practices:

• Visual Inspection: Regularly check the oil seal for signs of wear, such as cracks, tears, or excessive wear on the sealing lip. Any visible damage should be addressed immediately.
• Oil Leaks: If oil leaks are detected around the area where the oil seal is installed, it may be a sign that the seal needs to be replaced. Leaks can lead to decreased engine performance and potential engine damage if not addressed promptly.
• Proper Installation: Ensure that the oil seal is installed correctly. Improper installation can lead to premature failure of the seal. Follow the manufacturer’s guidelines for installation torque and procedures.
• Lubrication: Keep the area around the oil seal properly lubricated to ensure smooth operation and longevity of the seal.

Cummins: A Leader in Engine Technology

Cummins is a renowned manufacturer of engines and related components for commercial trucks. With a commitment to quality and innovation, Cummins provides reliable and durable parts that meet the demanding needs of the commercial trucking industry. The Cummins part #4947071 oil seal is a testament to their dedication to providing high-quality components that enhance the performance and reliability of commercial truck engines.

Cummins Engine Oil Seal 4947071 Compatibility

The Cummins Oil Seal part number 4947071 is designed to fit a variety of Cummins engines, ensuring a reliable seal to prevent oil leaks. Below is a detailed description of its compatibility with the listed engines:

B4.5 Series Engines

• B4.5 CM2350 B129B
• ISB4.5 CM2350 B104

These engines are part of the B4.5 series, which are known for their durability and efficiency. The oil seal 4947071 is engineered to fit these engines, providing a tight seal around the crankshaft to prevent oil leakage.

D4.0 Series Engines

• D4.0 CM2620 D103B

The D4.0 series engines, such as the D4.0 CM2620 D103B, benefit from the precise fit of the oil seal 4947071. This seal is crucial for maintaining the integrity of the engine’s lubrication system.

F3.8 Series Engines

• F3.8 CM2350 F120B
• F3.8 CM2350 F128C
• ISF3.8 CM2220 AN
• ISF3.8 CM2220 F103
• ISF3.8 CM2350 F109
• QSF3.8 CM2350 F107

The F3.8 series engines, including models like the F3.8 CM2350 F120B and ISF3.8 CM2220 F103, are designed for various applications, from construction to agricultural use. The oil seal 4947071 is compatible with these engines, ensuring optimal performance and longevity.

F4.5 Series Engines

• F4.5 CM2620 F139B
• F4.5 CM2620 F141C

The F4.5 series engines, such as the F4.5 CM2620 F139B, are known for their power and efficiency. The oil seal 4947071 is specifically designed to fit these engines, providing a reliable seal that helps maintain engine performance.

ISF4.5 Series Engine

• ISF4.5 CM2220 F123

The ISF4.5 CM2220 F123 engine is part of the ISF series, which is designed for high-performance applications. The oil seal 4947071 is compatible with this engine, ensuring that it operates smoothly and efficiently.

QSF3.8 Series Engines

• QSF3.8 CM2350 F107
• QSF3.8 CM2880 F112

The QSF3.8 series engines, including the QSF3.8 CM2350 F107 and QSF3.8 CM2880 F112, are built for demanding applications. The oil seal 4947071 is designed to fit these engines, providing a critical seal that helps maintain engine reliability and performance.

Role of Part 4947071 Oil Seal in Engine Systems

The 4947071 Oil Seal is an essential 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 moving parts within the engine.

Integration with Lower Engine Gasket Kit

When incorporated into a lower engine gasket kit, the 4947071 Oil Seal ensures that oil does not escape from the lower sections of the engine. This is particularly important in areas where gaskets interface with rotating components, such as crankshafts or camshafts. The seal works in conjunction with the gaskets to create a robust barrier that maintains oil pressure and prevents contamination from external debris.

Function in Lubricating Oil Pump

In the lubricating oil pump system, the 4947071 Oil Seal plays a significant role in maintaining the pump’s efficiency. It seals the rotating shaft of the pump, ensuring that oil is effectively drawn from the sump and delivered to various engine components without any loss. This seal helps in maintaining consistent oil flow, which is vital for the lubrication of moving parts and the overall cooling of the engine.

Interaction with Lubricating Oil System

Within the broader lubricating oil system, the 4947071 Oil Seal contributes to the system’s reliability by preventing oil leaks at critical junctions. Whether it’s sealing the interface between the pump and the engine block or between the crankshaft and the engine housing, this oil seal ensures that the lubricating oil remains contained within the system. This containment is essential for maintaining optimal oil pressure and ensuring that all engine components receive the necessary lubrication for smooth operation.

Overall Impact on Engine Performance

The effective deployment of the 4947071 Oil Seal across these systems enhances the engine’s performance and longevity. By ensuring that oil remains where it is needed and preventing leaks, this component helps in reducing wear and tear on engine parts, ultimately contributing to the engine’s overall efficiency and reliability.

Conclusion

Understanding the function and importance of the Cummins part #4947071 oil seal is essential for maintaining the health and efficiency of commercial truck engines. By ensuring proper installation, regular inspection, and timely maintenance, engineers, mechanics, truck drivers, and fleet operators can help extend the life of their engines and reduce downtime.