3918875
Fuel Supply Tube
Cummins®

Introduction

The Cummins 3918875 Fuel Supply Tube is a critical component in the fuel delivery system of commercial trucks, specifically designed to facilitate the transfer of fuel from the tank to the engine. This ensures a consistent and reliable supply of fuel for combustion, directly influencing the engine’s performance and efficiency ¹.

Basic Concepts of Fuel Supply Tubes

A fuel supply tube serves as a conduit within the fuel system, carrying fuel from the tank to the engine. Its efficiency and reliability are paramount for the truck’s engine performance, making it a key component in the fuel delivery process ².

Purpose and Role of the 3918875 Fuel Supply Tube

This Cummins part ensures a consistent flow of fuel to the engine, designed to withstand the pressures and conditions within the fuel system. A reliable fuel supply is essential for maintaining engine performance and efficiency ³.

Key Features

The 3918875 is characterized by its material composition, designed to resist corrosion and wear, and its design elements that ensure a secure fit within the fuel system. These features enhance its performance and durability under the pressures and temperatures of the fuel system ⁴.

Benefits of Using the 3918875 Fuel Supply Tube

Utilizing this part offers advantages such as improved fuel efficiency, reliability, and longevity. Its design and material composition contribute to a more efficient fuel delivery system, leading to better overall engine performance and durability in commercial truck operations ¹.

Installation and Compatibility

Proper installation of the Fuel Supply Tube is crucial for a secure and efficient connection within the truck’s fuel system. Compatibility information with various Cummins engine models ensures the tube is suitable for specific applications, highlighting the importance of following installation guidelines ².

Troubleshooting Common Issues

Regular inspection and maintenance can identify common problems such as leaks or blockages. Troubleshooting steps include checking for wear or damage, ensuring secure connections, and cleaning or replacing the tube if necessary. Promptly addressing these issues maintains the efficiency and reliability of the fuel system ³.

Maintenance Tips

Regular maintenance practices, including inspection intervals and cleaning procedures, are recommended to ensure the longevity and optimal performance of the 3918875. These practices help prevent issues and ensure the fuel supply tube continues to function effectively ⁴.

Safety Considerations

When handling and working with the fuel supply tube, observing safety guidelines and precautions is important to prevent accidents and ensure safe operation. This includes wearing appropriate personal protective equipment, working in a well-ventilated area, and following proper procedures for handling and disposing of fuel.

About Cummins

Cummins Inc. is renowned in the commercial truck industry for its commitment to quality and innovation. The company offers a range of engine and component solutions designed to meet the demands of commercial truck operation, with a strong reputation for reliability and high performance.

Cummins Fuel Supply Tube 3918875 Compatibility

The Cummins Fuel Supply Tube part number 3918875 is essential for the fuel delivery system of several engine models, ensuring efficient fuel transfer from the fuel tank to the engine. This maintains the necessary fuel pressure and flow for optimal engine performance.

Engine Compatibility

• 6C8.3 Series
  • The 3918875 is specifically designed for the 6C8.3 engine series, known for its robust design and used in heavy-duty applications. It requires reliable and durable fuel delivery components.

Installation and Function

Installing the 3918875 involves connecting it to the fuel tank and routing it to the engine’s fuel injection system. Proper installation ensures uninterrupted fuel supply, preventing engine performance issues.

Importance in Engine Performance

A well-functioning fuel supply tube is vital for maintaining engine efficiency and longevity. It delivers the correct amount of fuel at the right pressure, crucial for the engine’s combustion process. Any issues with the tube can lead to fuel delivery problems, causing engine misfires or reduced power output.

Maintenance Considerations

Regular inspection and maintenance of the 3918875 are recommended to ensure its integrity and performance. Checking for wear, corrosion, or leaks helps identify potential issues before they become significant problems.

Compatibility with Other Cummins Engines

While primarily for the 6C8.3 engine series, similar fuel supply tubes are used across various Cummins engine models. Ensuring the correct part number and specifications is crucial when replacing or upgrading fuel delivery components.

Role of Part 3918875 Fuel Supply Tube in Engine Systems

The 3918875 is integral to the fuel delivery system, ensuring a consistent and reliable flow of fuel from the fuel tank to the engine’s fuel injectors or carburetor. It works with other components to maintain efficient engine performance.

Integration with Plumbing

In engine plumbing, the 3918875 serves as a vital conduit, transporting fuel under pressure from the fuel pump to the fuel rail or carburetor. It is designed to withstand the pressures and temperatures of fuel delivery, ensuring fuel reaches the engine components without leaks or interruptions. Its integration with the plumbing system allows for a streamlined flow, reducing the risk of fuel starvation and enhancing engine reliability.

Interaction with Fuel Filter

The Fuel Supply Tube also plays a significant role when paired with the fuel filter. Positioned between the fuel tank and the engine, the fuel filter removes impurities and contaminants from the fuel before it reaches the engine. The 3918875 delivers clean fuel from the filter to the engine, ensuring that only purified fuel is used for combustion. This interaction is essential for maintaining engine efficiency and longevity, as clean fuel combustion leads to better performance and reduced wear on engine components.

Conclusion

The 3918875 Fuel Supply Tube is a key component in the fuel delivery system, working in harmony with the plumbing and fuel filter to ensure a consistent, clean, and reliable supply of fuel to the engine. Its role in maintaining engine performance and efficiency underscores the importance of proper installation, regular maintenance, and adherence to safety guidelines.