3920684
Fuel Transfer Tube
Cummins®

Introduction

The Cummins 3920684 Fuel Transfer Tube is a component designed for use in the fuel systems of heavy-duty trucks. Its purpose is to facilitate the efficient transfer of fuel from the tank to the engine, ensuring that the engine receives a consistent and reliable fuel supply. This component is integral to the overall performance and reliability of the truck’s fuel system ⁴.

Basic Concepts of Fuel Transfer Tubes

A fuel transfer tube is a conduit that allows fuel to move from the fuel tank to the engine. It plays a role in the fuel system by providing a pathway for fuel to travel, ensuring that the engine receives the necessary fuel for combustion. The efficiency of the fuel transfer tube is vital for maintaining optimal engine performance and fuel economy. It must be designed to withstand the pressures and temperatures within the fuel system while ensuring a leak-free connection ¹.

Purpose of the Cummins 3920684 Fuel Transfer Tube

The Cummins 3920684 Fuel Transfer Tube is specifically engineered to transfer fuel from the tank to the engine in heavy-duty trucks. It ensures that fuel is delivered efficiently and reliably, which is crucial for the engine’s operation. By maintaining a consistent fuel flow, this component helps in achieving stable engine performance and contributes to the overall efficiency of the truck ².

Key Features

The Cummins 3920684 Fuel Transfer Tube is characterized by its robust design and the materials used in its construction. It is made from high-quality materials that are resistant to the corrosive effects of fuel and the high pressures within the fuel system. The tube is designed to be durable and long-lasting, with precise fittings that ensure a secure connection within the fuel system. Its design also takes into account the need for easy installation and maintenance ³.

Benefits of Using the Cummins 3920684 Fuel Transfer Tube

Utilizing the Cummins 3920684 Fuel Transfer Tube offers several advantages. It contributes to improved fuel efficiency by ensuring a consistent and reliable fuel supply to the engine. The tube’s design and materials enhance its durability and resistance to wear and corrosion, leading to a longer service life. Additionally, it is compatible with Cummins engines, ensuring seamless integration and optimal performance within the fuel system ⁴.

Installation and Integration

Proper installation of the Cummins 3920684 Fuel Transfer Tube is vital for its effective operation. It should be installed according to the manufacturer’s guidelines to ensure a secure fit and proper function within the fuel system. This may involve specific steps or precautions to maintain the integrity of the fuel system and prevent leaks. Careful attention to these details during installation will help ensure the tube operates as intended ¹.

Maintenance and Troubleshooting

To ensure the longevity and optimal performance of the Cummins 3920684 Fuel Transfer Tube, regular maintenance is recommended. This may include periodic inspections for signs of wear or damage, and ensuring all connections are secure. Troubleshooting common issues, such as leaks or inconsistent fuel flow, may involve checking for proper installation, inspecting for damage, and ensuring compatibility with other fuel system components ².

Safety Considerations

When working with the fuel system and the Cummins 3920684 Fuel Transfer Tube, it is important to follow safety guidelines. This includes proper handling of fuel to prevent spills and ensuring the fuel system’s integrity to avoid leaks. Adhering to these safety considerations helps protect both the operator and the environment from potential hazards associated with fuel systems ³.

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 automotive and heavy-duty truck industry. The company’s commitment to excellence is reflected in its products, including the Cummins 3920684 Fuel Transfer Tube, which is designed to meet the demanding requirements of heavy-duty applications ⁴.

Cummins Fuel Transfer Tube 3920684 Compatibility

The Cummins Fuel Transfer Tube part number 3920684 is designed to fit a range of engine models, ensuring efficient fuel transfer within the engine system. This part is integral to maintaining the performance and reliability of the engines it is compatible with.

Compatible Engines

• 6B5.9 and 6C8.3 Engines

  • The Fuel Transfer Tube 3920684 is specifically engineered to fit the 6B5.9 and 6C8.3 engines. These engines are known for their robust design and high performance, and the fuel transfer tube plays a role in their operation by ensuring a steady and clean fuel supply to the engine components.

• L9.3 and L105 Engines

  • Similarly, the part number 3920684 is also compatible with the L9.3 and L105 engines. These engines benefit from the precise engineering of the fuel transfer tube, which helps in maintaining optimal fuel flow and pressure, contributing to the overall efficiency and longevity of the engine.

Installation and Functionality

The installation of the Cummins Fuel Transfer Tube 3920684 is straightforward and requires no special tools. It is designed to fit seamlessly into the engine’s fuel system, ensuring that fuel is transferred efficiently from the fuel tank to the engine. This part plays a role in preventing fuel contamination and ensuring that the engine receives a consistent fuel supply, which is essential for maintaining performance and reliability.

By ensuring that the fuel transfer tube is properly installed and functioning, engine operators can expect improved engine performance, reduced maintenance needs, and enhanced overall reliability. This part is a key component in the engine’s fuel system, and its proper installation is crucial for the engine’s optimal operation ¹.

Role of Part 3920684 Fuel Transfer Tube in Engine Systems

The Fuel Transfer Tube (part 3920684) is an integral component in the fuel delivery system of an engine, ensuring efficient and reliable fuel transfer between various components. Its role can be understood by examining its interaction with other key elements in the system.

Interaction with the Base Fuel Pump

The Fuel Transfer Tube connects to the Base Fuel Pump, facilitating the movement of fuel from the pump to subsequent components. This tube ensures a consistent fuel supply, allowing the base fuel pump to operate efficiently by maintaining the required fuel pressure and flow rate ².

Integration with the Bosch Injection Pump

In systems utilizing a Bosch Injection Pump, the Fuel Transfer Tube plays a role in delivering fuel from the base fuel pump to the injection pump. This ensures that the injection pump receives a steady fuel supply, which is essential for precise fuel metering and injection timing ³.

Connection to the Filter Tube

The Fuel Transfer Tube is often linked to a Filter Tube, which helps in filtering out impurities from the fuel before it reaches more sensitive components. This connection ensures that clean fuel is transferred, protecting the integrity of the fuel system and enhancing engine performance ⁴.

Role in the Fuel Manifold

When connected to a Fuel Manifold, the Fuel Transfer Tube distributes fuel to multiple injectors or carburetors. This balanced distribution is vital for uniform fuel delivery across all cylinders, promoting even combustion and optimal engine operation ¹.

Importance in Fuel Plumbing

Within the broader Fuel Plumbing system, the Fuel Transfer Tube acts as a vital conduit. It ensures that fuel is transported efficiently from the fuel tank to the engine components, minimizing the risk of leaks and maintaining system pressure ².

Coordination with the Fuel Pump

The Fuel Transfer Tube works in tandem with the Fuel Pump to maintain a consistent fuel supply. By ensuring seamless fuel transfer, it supports the fuel pump’s function of pressurizing and delivering fuel to the engine ³.

Contribution to Overall Fuel System Efficiency

In summary, the Fuel Transfer Tube (part 3920684) is a key component in the fuel system, ensuring efficient fuel transfer and distribution. Its proper function is essential for the reliable operation of the Base Fuel Pump, Bosch Injection Pump, Filter Tube, Fuel Manifold, and the entire Fuel Plumbing system ⁴.

Conclusion

The Cummins 3920684 Fuel Transfer Tube is a critical component in the fuel systems of heavy-duty trucks, ensuring efficient and reliable fuel transfer from the tank to the engine. Its robust design, compatibility with various Cummins engines, and role in maintaining optimal engine performance make it an essential part of the fuel delivery system. Proper installation, maintenance, and adherence to safety guidelines are crucial for maximizing the benefits of this component.