3935372
Oil Filler Tube
Cummins®

The Cummins Oil Filler Tube, part number 3935372, is a component designed for use in heavy-duty trucks. Its primary function is to facilitate the addition of oil to the engine’s lubrication system. Cummins, a well-established manufacturer in the automotive industry, is renowned for its expertise in diesel engine technology and commitment to quality.

Function and Operation

This Cummins part operates as a conduit for adding oil to the engine. It is part of the engine’s lubrication system, which is vital for reducing friction between moving parts, dissipating heat, and removing contaminants ¹. The tube allows for the controlled addition of oil, ensuring that the engine maintains the correct oil level for optimal performance. The process involves inserting the oil delivery nozzle into the tube and pouring the oil until it reaches the designated level, as indicated by the engine’s oil level gauge or dipstick.

Key Features

The Oil Filler Tube is constructed from durable materials, ensuring it can withstand the high temperatures and pressures present in heavy-duty truck engines. Its design includes features such as a secure fitting to prevent oil leaks and a wide opening for ease of use during oil changes. Additionally, the tube may incorporate design elements that enhance its sealing properties, contributing to the overall efficiency of the lubrication system.

Benefits

This part offers several advantages. Its design facilitates easier oil changes, reducing the time and effort required for maintenance. The enhanced sealing properties help prevent oil leaks, which can lead to engine damage and increased maintenance costs. By ensuring a consistent oil level, the tube contributes to maintaining optimal engine lubrication, which is crucial for engine longevity and performance.

Installation and Compatibility

Proper installation of the Oil Filler Tube is important for its effective function. It is designed to fit specific engine models, and adherence to the manufacturer’s guidelines ensures compatibility and correct fitting. Installation typically involves removing the old tube, if present, and securing the new tube in its place, ensuring all connections are tight and secure.

Maintenance and Troubleshooting

Regular maintenance of the Oil Filler Tube includes checking for signs of wear or damage, such as cracks or leaks, and ensuring that it remains securely fitted. Common issues may include oil leaks, which can often be addressed by tightening connections or replacing worn seals. If the tube becomes damaged, it should be replaced to prevent oil loss and maintain engine lubrication.

Safety Considerations

When working with the Oil Filler Tube, it is important to observe safety practices. This includes allowing the engine to cool before attempting any maintenance to avoid burns from hot oil or components. Ensuring that the tube is properly sealed is also important to prevent oil leaks, which can pose a slip hazard and lead to engine damage.

Cummins Overview

Cummins Inc. is a leader in the diesel engine manufacturing industry, with a history of innovation and quality. The company’s expertise in engine technology and commitment to advancing the automotive industry are evident in its product offerings, including the Oil Filler Tube. Cummins’ focus on quality and performance ensures that its components meet the demanding requirements of heavy-duty applications.

Cummins Oil Filler Tube 3935372 Compatibility

The Cummins Oil Filler Tube part number 3935372 is designed to fit seamlessly with a range of Cummins engines. This part is integral for maintaining the proper oil levels and ensuring the engine operates smoothly. Below are the specific engines and engine groups where this oil filler tube is applicable:

• 4B3.9: The 4B3.9 engine benefits from the precise fit and quality construction of the 3935372 oil filler tube, ensuring optimal oil management and engine performance.

• Other Cummins Engines: While the 4B3.9 is highlighted, the 3935372 oil filler tube is also compatible with various other Cummins engines. This part is engineered to meet the stringent requirements of Cummins engines, providing a reliable solution for oil level monitoring and maintenance.

The compatibility of the 3935372 oil filler tube with these engines underscores its importance in maintaining engine health and efficiency.

Role of Part 3935372 Oil Filler Tube in Engine Systems

The part 3935372 Oil Filler Tube is a component in the lubrication system of an engine. It is designed to facilitate the addition of oil into the engine’s lubrication system, ensuring that all moving parts are adequately lubricated for optimal performance and longevity.

Integration with the Cylinder Block

The Oil Filler Tube is strategically positioned to interface with the cylinder block. The cylinder block houses the cylinders, pistons, and other critical components that facilitate the engine’s power generation. Proper lubrication is vital to reduce friction and wear between these components ². The Oil Filler Tube allows for the direct addition of oil into the cylinder block, ensuring that the lubrication system maintains the necessary oil levels to protect these components.

Interaction with the Engine Cover

The engine cover, which encases the engine to protect it from external elements and contain oil within the system, also plays a role in the functionality of the Oil Filler Tube. The tube is typically mounted through the engine cover, providing a secure and sealed pathway for oil to enter the system. This setup ensures that oil is added without leakage, maintaining the integrity of the lubrication system and preventing contamination from external debris.

Lubrication System Dynamics

When oil is added through the Oil Filler Tube, it flows into the oil pan or sump, where it is then circulated by the oil pump throughout the engine. This circulation ensures that all critical components, including the cylinder block, crankshaft, camshaft, and valve train, receive the necessary lubrication. The Oil Filler Tube, therefore, plays a significant role in maintaining the overall health and efficiency of the engine by ensuring that the lubrication system operates effectively.

Conclusion

The Cummins Oil Filler Tube, part number 3935372, is a critical component in the maintenance and operation of heavy-duty truck engines. Its design and functionality are integral to ensuring optimal engine lubrication, which is essential for engine performance and longevity. Proper installation, maintenance, and understanding of its role within the engine system are key to leveraging the full benefits of this part.