3936687
Fuel Supply Tube
Cummins®

Introduction

The Fuel Supply Tube 3936687, a component manufactured by Cummins, is specifically designed for the fuel systems of heavy-duty trucks. This part ensures a consistent and reliable fuel supply from the tank to the engine, which is crucial for the engine’s operation.

Basic Concepts of Fuel Supply Tubes

A fuel supply tube is a conduit that delivers fuel from the tank to the engine. It is a critical component in the fuel delivery system, ensuring that the engine receives the necessary fuel at the correct pressure and flow rate. These tubes are typically constructed from durable materials such as rubber, metal, or a combination of both, to withstand the pressures and temperatures encountered in the fuel system ¹.

Role of the Fuel Supply Tube in Truck Operation

The Fuel Supply Tube 3936687 contributes to the efficient operation of a truck’s engine by providing a reliable pathway for fuel delivery. It helps maintain consistent fuel pressure, which is necessary for optimal engine performance. The tube’s design ensures that fuel is delivered smoothly and without interruption, which is crucial for the engine’s combustion process and overall efficiency.

Key Features of the Fuel Supply Tube 3936687

This Cummins part is characterized by its robust design and construction. It is made from materials that offer high durability and resistance to the elements found within the fuel system. The tube features secure connection types that ensure a tight seal, preventing fuel leaks. Additionally, it may include unique design elements that enhance its performance, such as reinforced sections to withstand high pressure or flexible segments to accommodate movement within the truck’s chassis.

Benefits of Using the Fuel Supply Tube 3936687

Utilizing this part offers several advantages. It contributes to improved fuel efficiency by ensuring a consistent and uninterrupted fuel supply to the engine. The tube’s reliable construction and design enhance the overall reliability of the fuel system. Moreover, it is specifically engineered to be compatible with Cummins engines, ensuring seamless integration and optimal performance.

Troubleshooting and Maintenance

Common issues with fuel supply tubes can include leaks, blockages, or degradation over time. To diagnose problems, one should check for visible signs of damage, ensure connections are secure, and verify that fuel is flowing correctly. Regular maintenance practices, such as inspecting the tube for wear and replacing it as needed, can help ensure the longevity and optimal performance of the Fuel Supply Tube 3936687 ².

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration, and emissions technologies. With a history spanning over a century, Cummins has established a strong reputation in the commercial truck industry for producing reliable and high-performance products. The company’s extensive product range and commitment to innovation have made it a preferred choice for heavy-duty truck applications.

Application in Cummins Engines

The Fuel Supply Tube part number 3936687 is compatible with several Cummins engine models, including but not limited to:

• 6B5.9 Series: This part is integral to the fuel system of the 6B5.9 engines, ensuring that fuel is delivered consistently and accurately to the injectors. This helps maintain optimal engine performance and efficiency.

Importance in Engine Performance

The proper functioning of the Fuel Supply Tube is essential for the overall health of the engine. It helps prevent fuel leaks, which can lead to engine damage and reduced performance. Additionally, it ensures that the fuel injectors receive the correct amount of fuel, which is crucial for maintaining the engine’s power output and fuel economy.

Installation and Maintenance

When installing the Fuel Supply Tube part number 3936687, it is important to follow the manufacturer’s guidelines to ensure a secure and leak-free connection. Regular maintenance checks should be performed to inspect for any signs of wear or damage, which can compromise the fuel system’s integrity.

Compatibility

This fuel supply tube is designed to fit seamlessly with the specified Cummins engines, ensuring compatibility and ease of installation. It is engineered to withstand the rigors of engine operation, providing a durable solution for fuel delivery needs.

Role of Part 3936687 Fuel Supply Tube in Engine Systems

The part 3936687 Fuel Supply Tube 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 fuel filter and subsequently to the engine’s fuel injection system or carburetor.

In systems equipped with a fuel filter, the Fuel Supply Tube connects directly to the filter’s inlet, ensuring a steady and clean flow of fuel. The fuel filter plays a significant role in removing impurities and contaminants from the fuel before it reaches the engine, thereby protecting sensitive components such as fuel injectors and carburetor jets from damage.

Furthermore, the Fuel Supply Tube interfaces with the engine’s plumbing system, which includes various hoses, connectors, and regulators. This integration ensures that the fuel is delivered at the correct pressure and volume required by the engine under different operating conditions. The plumbing system also incorporates safety features such as fuel return lines and pressure relief valves, which help maintain optimal fuel system performance and prevent issues such as fuel starvation or over-pressurization.

Conclusion

In summary, the Fuel Supply Tube 3936687 works in concert with the fuel filter and the engine’s plumbing system to ensure efficient and reliable fuel delivery, which is fundamental for the engine’s performance and longevity.