3948116
Fuel Supply Tube
Cummins®

Introduction

The Cummins 3948116 Fuel Supply Tube is a critical component in heavy-duty truck fuel systems, designed to facilitate the transfer of fuel from the tank to the engine. This ensures a consistent and reliable fuel supply, contributing to the performance and efficiency of heavy-duty trucks ¹.

Function and Operation

This Cummins part operates as a conduit within the fuel system, delivering fuel from the tank to the engine. It is engineered to withstand the pressures and conditions within the fuel system, providing a secure and efficient pathway for fuel delivery ².

Key Features

The Fuel Supply Tube is constructed from materials that offer durability and resistance to the corrosive effects of fuel. Its design ensures it can handle the pressures and temperatures encountered in heavy-duty truck applications. Additionally, the tube may feature reinforced sections for added strength or specialized coatings for improved resistance to wear and corrosion ³.

Benefits

The 3948116 offers several advantages, including improved fuel efficiency by ensuring a consistent and reliable fuel supply to the engine. Its durable construction and resistance to wear and corrosion enhance its reliability, reducing the likelihood of fuel system failures. Furthermore, its compatibility with Cummins engines ensures seamless integration into the fuel system, supporting optimal engine performance ⁴.

Installation and Compatibility

Proper installation of this part is crucial for ensuring its effective operation within the fuel system. Installation guidelines may include specific tools or procedures to ensure a secure and leak-free connection. Compatibility with various Cummins engine models is an important consideration, ensuring that the tube can be used across a range of heavy-duty truck applications ⁵.

Maintenance and Troubleshooting

Routine maintenance practices are recommended to ensure the longevity and optimal performance of the Fuel Supply Tube. These may include regular inspections for signs of wear or damage, as well as cleaning or replacing the tube as necessary. Common issues that may arise include leaks or blockages, which can be addressed through troubleshooting steps such as checking connections, cleaning the tube, or replacing damaged sections ⁶.

Safety Considerations

When working with the 3948116, it is important to follow safety precautions and guidelines. This includes handling fuel with care to avoid spills or exposure to harmful vapors. Ensuring the integrity of the fuel system is also crucial, as leaks or failures can pose safety risks. Following manufacturer recommendations for installation, maintenance, and operation can help ensure safe and reliable performance ⁷.

Cummins Corporation 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 product offerings include a wide range of engines and components designed to meet the demanding requirements of heavy-duty applications ⁸.

Compatibility

The Fuel Supply Tube part number 3948116 is designed to fit seamlessly within the ISB CM550 and QSB5.9 44 CM550 engines. This part is crucial for the proper functioning of the fuel system, ensuring that fuel is delivered efficiently and safely from the fuel tank to the engine.

For the ISB CM550 engine, the fuel supply tube is engineered to integrate with the engine’s fuel delivery system, providing a reliable conduit for fuel flow. This ensures that the engine operates smoothly and maintains optimal performance.

Similarly, in the QSB5.9 44 CM550 engine, the fuel supply tube is meticulously designed to fit within the engine’s architecture. This compatibility is essential for maintaining the integrity of the fuel system and ensuring that the engine receives the necessary fuel supply for efficient operation.

Both engines benefit from the use of this specific fuel supply tube, as it is crafted to meet the precise requirements of each engine model. This ensures that the fuel supply tube functions effectively within the engine’s design, contributing to overall engine performance and reliability ⁹.

Role in Engine Systems

The 3948116 is an essential component in the fuel delivery system of various engine setups. Its primary function is to transport fuel from the fuel tank to the engine’s fuel injection system or carburetor. This seamless fuel transfer is vital for the engine’s performance and efficiency.

Integration with Plumbing

In the context of engine plumbing, the Fuel Supply Tube connects to the fuel lines that run throughout the vehicle. It ensures a consistent and reliable flow of fuel, minimizing the risk of fuel starvation or pressure fluctuations that could affect engine performance. The tube is designed to withstand the pressures and temperatures within the fuel system, ensuring durability and longevity ¹⁰.

Interaction with Fuel Filter

The Fuel Supply Tube also plays a significant role when integrated with the fuel filter. Positioned upstream of the fuel filter, the tube delivers raw fuel from the tank. The fuel then passes through the filter, where contaminants and impurities are removed before reaching the engine. This filtration process is essential for maintaining the cleanliness of the fuel, which in turn protects the fuel injectors and other sensitive components within the engine.

By ensuring a clean and steady fuel supply, the Fuel Supply Tube contributes to the overall efficiency and reliability of the engine system. Its proper installation and maintenance are key to preventing issues such as engine misfires, reduced power output, and increased fuel consumption ¹¹.

Conclusion

The Cummins 3948116 Fuel Supply Tube is a vital component in the fuel systems of heavy-duty trucks, ensuring a consistent and reliable fuel supply to the engine. Its durable construction, compatibility with various Cummins engines, and role in maintaining fuel system integrity make it an essential part for optimal engine performance and efficiency.