3936691
Fuel Supply Tube
Cummins®

Introduction

The Cummins 3936691 Fuel Supply Tube is a critical component in the fuel systems of heavy-duty trucks, designed to ensure a consistent and reliable fuel supply to the engine. This part is essential for the engine’s efficiency and performance, facilitating the transfer of fuel from the tank to the engine.

Basic Concepts of Fuel Supply Tubes

A fuel supply tube, such as the Cummins 3936691, is a conduit within the fuel system that carries fuel from the tank to the engine. It maintains a steady flow of fuel under pressure, which is vital for engine operation. The tube’s design and material are chosen to withstand the pressures and temperatures in the fuel system, ensuring efficient and contamination-free fuel delivery ¹.

Role of the Cummins 3936691 Fuel Supply Tube in Truck Operation

This Cummins part ensures that fuel is delivered to the engine in a controlled and consistent manner, contributing to engine performance and efficiency. It provides the necessary fuel pressure and flow rate for optimal combustion, minimizing fuel leaks and maintaining the integrity of the fuel system.

Key Features

The Cummins 3936691 is characterized by its robust design and the materials used in its construction. It is engineered to handle the high pressures and temperatures typical of heavy-duty truck fuel systems. The tube’s construction includes features that enhance its durability and resistance to wear and corrosion, ensuring long-term reliability in demanding operating conditions.

Benefits

Using the Cummins 3936691 offers several benefits. It provides improved fuel delivery, which is vital for maintaining engine performance. The tube’s design contributes to enhanced engine efficiency by ensuring that fuel is delivered at the correct pressure and flow rate. Additionally, its durability and resistance to wear contribute to increased reliability and reduced maintenance requirements.

Troubleshooting and Maintenance

To maintain the performance of this Cummins part, regular inspection for signs of wear, leaks, or damage is recommended. Maintenance practices should include checking for proper connections and ensuring that the tube is free from obstructions. In the event of issues, troubleshooting may involve checking for proper fuel pressure and flow, and inspecting the tube for any signs of damage or wear that could affect its performance ².

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions. With a history spanning over a century, Cummins is renowned for its high-quality diesel engines and components, serving commercial vehicle, industrial, and power generation markets. The company’s commitment to innovation, quality, and customer satisfaction has established it as a trusted name in the industry.

Cummins Fuel Supply Tube Part 3936691 Compatibility

The Cummins Fuel Supply Tube part number 3936691 is designed to fit seamlessly with various engine models, ensuring optimal fuel delivery and performance. This component is integral to the engine’s fuel system, facilitating the transfer of fuel from the fuel tank to the engine’s fuel injection system.

Engine Compatibility

• 6B5.9 Series

  • The 6B5.9 engine series benefits significantly from the precise engineering of the 3936691. This part ensures that the engine maintains consistent fuel pressure and flow, which is crucial for its operational efficiency and longevity.

• Other Cummins Engines

  • While the 6B5.9 series is a primary focus, the 3936691 is also compatible with other Cummins engines that share similar design and operational requirements. This ensures that the part can be used across multiple engine models, providing a versatile solution for fuel system needs.

Installation and Functionality

The installation of the 3936691 is straightforward, designed to integrate easily with the existing fuel system architecture of the engines. Its robust construction ensures durability and resistance to wear, which is essential for maintaining the integrity of the fuel supply line over time.

By ensuring a secure and leak-free connection, this fuel supply tube helps prevent fuel contamination and maintains the engine’s performance standards. The precision in its design allows for efficient fuel flow, which is critical for the engine’s overall efficiency and power output.

Role of Part 3936691 Fuel Supply Tube in Engine Systems

The Part 3936691 Fuel Supply Tube is integral to the efficient operation of engine systems by ensuring a consistent and reliable flow of fuel from the fuel tank to the engine’s fuel injection system. This component interfaces directly with the fuel filter plumbing, facilitating the transition of fuel through the filtration process before it reaches the engine.

Integration with Fuel Filter Plumbing

The Fuel Supply Tube connects to the fuel filter plumbing, which is responsible for removing impurities and contaminants from the fuel. This connection ensures that only clean fuel passes through to the engine, enhancing combustion efficiency and protecting internal engine components from damage.

Interaction with Plumbing Components

Beyond the fuel filter, the Fuel Supply Tube is also a key element in the overall plumbing of the fuel system. It works in conjunction with various plumbing components to maintain pressure and flow rates necessary for optimal engine performance. This includes connections to fuel lines, regulators, and other ancillary components that contribute to the fuel delivery system.

Ensuring Fuel Quality with the Fuel Filter

By linking the fuel tank to the fuel filter, the Fuel Supply Tube plays a significant role in maintaining fuel quality. The fuel filter captures particulates and debris, preventing them from entering the engine and causing wear or malfunction. The consistent flow provided by the Fuel Supply Tube ensures that the filter operates effectively, prolonging its lifespan and enhancing engine reliability.

Supporting Engine Performance

The reliable delivery of fuel is essential for consistent engine performance. The Fuel Supply Tube, by ensuring a steady supply of clean fuel, supports the engine’s ability to maintain power output, fuel efficiency, and emissions control. Its role in the fuel system is foundational, enabling other components to function as intended.

Conclusion

The Cummins 3936691 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 robust design, compatibility with various engine models, and integration with fuel filter plumbing make it an essential part for maintaining engine performance and efficiency. Regular maintenance and troubleshooting are key to ensuring the longevity and reliability of this part in demanding operating conditions.