3930389
Injector Fuel Supply Tube
Cummins®

The Cummins Injector Fuel Supply Tube, part number 3930389, is a critical component in the fuel system of commercial trucks. Cummins, a leader in diesel engine technology, designs this part to ensure efficient and reliable fuel delivery, contributing to the overall performance and efficiency of diesel engines in heavy-duty applications.

Basic Concepts of Injector Fuel Supply Tubes

An Injector Fuel Supply Tube is a conduit within the fuel system that facilitates the transfer of fuel from the fuel rail to the injector. This tube plays a role in maintaining consistent fuel pressure and flow, which are vital for the precise operation of fuel injectors. The efficiency of this component directly influences the combustion process, impacting engine performance, fuel economy, and emissions ¹.

Purpose of the Injector Fuel Supply Tube

The Injector Fuel Supply Tube is designed to deliver fuel from the fuel rail to the injector in a controlled manner. This ensures that the injector receives a steady supply of fuel at the correct pressure, enabling it to atomize the fuel effectively for combustion. The tube’s role in the fuel delivery system is fundamental to achieving optimal engine performance and efficiency ².

Key Features

The Injector Fuel Supply Tube is constructed from high-quality materials, ensuring durability and resistance to the high pressures and temperatures within the fuel system. Its design incorporates precise engineering to maintain fuel integrity and prevent leaks. Unique characteristics such as corrosion resistance and compatibility with various fuel types enhance its performance and longevity ³.

Benefits

Utilizing the Injector Fuel Supply Tube offers several advantages, including improved fuel delivery efficiency, which leads to enhanced engine performance. The tube’s design contributes to more consistent fuel atomization, resulting in more complete combustion and reduced emissions. Additionally, its robust construction ensures reliability and longevity, reducing the need for frequent replacements.

Installation and Compatibility

Proper installation of the Injector Fuel Supply Tube involves following manufacturer guidelines to ensure a secure fit and seal within the fuel system. Compatibility with specific engine models and configurations is crucial for optimal performance. Detailed instructions and compatibility information should be consulted to ensure the tube is correctly installed and functions as intended within the engine’s fuel system.

Maintenance and Troubleshooting

Routine maintenance of the Injector Fuel Supply Tube includes regular inspections for signs of wear, corrosion, or leaks. Cleaning the tube and ensuring all connections are tight can prevent issues related to fuel delivery. Common problems may include fuel leaks or inconsistent fuel pressure, which can often be addressed by inspecting and tightening connections or replacing worn components as necessary.

Safety Considerations

When working with the Injector Fuel Supply Tube, it is important to follow safety precautions to avoid hazards associated with fuel systems. This includes working in a well-ventilated area, wearing appropriate personal protective equipment, and ensuring the engine is off and cool before beginning any maintenance or installation procedures. Awareness of the potential for fuel spills and the importance of proper disposal of fuel-contaminated materials is also crucial.

Cummins 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 commercial truck industry. The company’s commitment to advancing diesel engine technology is evident in its wide range of products, designed to meet the demanding requirements of heavy-duty applications.

Cummins Injector Fuel Supply Tube (Part 3930389)

The Cummins Injector Fuel Supply Tube, identified by the part number 3930389, is a critical component in the fuel delivery system of various Cummins engines. This part ensures the efficient and reliable transfer of fuel from the fuel supply system to the injectors, which is essential for the engine’s performance and longevity.

Application in Cummins Engines

6C8.3 Engine

The 6C8.3 engine is a robust and reliable power unit designed for heavy-duty applications. The Injector Fuel Supply Tube (3930389) in this engine is engineered to withstand high pressures and temperatures, ensuring that the fuel is delivered consistently and accurately to the injectors. This part is crucial for maintaining the engine’s efficiency and performance, particularly in demanding environments.

Group Applications

The Injector Fuel Supply Tube (3930389) is also compatible with a range of other Cummins engines, where it serves the same vital function of ensuring the proper delivery of fuel to the injectors. This part is designed to fit seamlessly into the fuel system architecture of these engines, providing a reliable and durable solution for fuel supply needs.

By ensuring the integrity and efficiency of the fuel supply system, the Injector Fuel Supply Tube (3930389) plays a key role in the overall operation and reliability of Cummins engines.

Role of Part 3930389 Injector Fuel Supply Tube in Engine Systems

The Injector Fuel Supply Tube, identified by part number 3930389, is an integral component within the fuel delivery system of an engine. Its primary function is to facilitate the precise and efficient transfer of fuel from the fuel rail to the individual fuel injectors.

Integration with Fuel Plumbing

In the context of fuel plumbing, the Injector Fuel Supply Tube serves as a vital conduit. It connects the fuel rail, which maintains a consistent fuel pressure, to the fuel injectors. This ensures that each injector receives a steady supply of fuel under the correct pressure, which is essential for optimal combustion efficiency and engine performance. The tube’s design allows for minimal fuel leakage and maintains the integrity of the fuel pressure system.

Role in Injector Plumbing

Within injector plumbing, the Injector Fuel Supply Tube plays a key role in the distribution of fuel to each injector. It is responsible for delivering fuel in a manner that supports the injector’s operation, allowing for precise fuel metering. This precision is vital for achieving the desired air-fuel ratio, which directly impacts engine efficiency, power output, and emissions. The tube’s connection to the injectors must be secure and leak-free to prevent any disruption in fuel delivery, which could lead to misfires or inefficient combustion.

Conclusion

In summary, the Injector Fuel Supply Tube (part 3930389) is a fundamental component in both fuel and injector plumbing systems. It ensures that fuel is delivered efficiently and under the correct pressure to each injector, supporting the overall performance and reliability of the engine.