3955043
Fuel Supply Tube
Cummins®

Introduction

The Fuel Supply Tube 3955043 is a critical component manufactured by Cummins, specifically designed for use in commercial trucks. This article delves into the function, key features, benefits, and maintenance of this Cummins part, providing a comprehensive overview for professionals and enthusiasts alike.

Basic Concepts of Fuel Supply Tubes

A Fuel Supply Tube serves as a conduit that transports fuel from the fuel tank to the engine’s fuel injection system, ensuring a consistent and reliable supply of fuel, which is vital for the engine’s operation ¹. The tube is typically made from durable materials to withstand the pressures and temperatures associated with fuel delivery ².

Role of the 3955043 Fuel Supply Tube in Truck Operation

The 3955043 Fuel Supply Tube is integral to the fuel delivery system, providing a pathway for fuel to travel from the tank to the engine. This ensures that the engine receives the necessary fuel for combustion, which powers the truck. Proper function of the Fuel Supply Tube is crucial for maintaining engine performance and efficiency ³.

Key Features

The 3955043 Fuel Supply Tube boasts several key features:

• Durable Construction: Designed to resist wear and corrosion, ensuring longevity.
• Precise Engineering: Ensures a secure fit and reliable fuel delivery.
• Compatibility: Specifically engineered for Cummins engines and other specified commercial truck models.

Benefits

The benefits of the 3955043 Fuel Supply Tube include:

• Enhanced Fuel Delivery Reliability: Ensures a consistent supply of fuel to the engine.
• Improved Engine Performance: Consistent fuel supply leads to better engine performance.
• Long-Lasting Durability: Built to withstand demanding conditions, providing long-term reliability.

Troubleshooting and Maintenance

To ensure the optimal performance of the 3955043 Fuel Supply Tube, consider the following maintenance suggestions:

• Regular Inspection: Check for signs of wear, leaks, or damage.
• Secure Connections: Ensure all connections are secure and free from corrosion.
• Timely Replacement: Replace the tube if any significant damage is detected to prevent fuel delivery issues.

Compatibility with Cummins Engines

The 3955043 Fuel Supply Tube is designed to fit seamlessly within the engine systems of the ISB CM850 and QSB6.7 CM850 (CM2850) engines. This part is integral to the proper functioning of these engines, ensuring that fuel is delivered efficiently and safely from the fuel tank to the engine’s fuel system.

ISB CM850

The ISB CM850 engine is known for its robust performance and reliability. The Fuel Supply Tube 3955043 is specifically engineered to integrate with the ISB CM850’s fuel delivery system, ensuring optimal fuel flow and pressure.

QSB6.7 CM850 (CM2850)

Similarly, the QSB6.7 CM850 (CM2850) engine benefits from the precise fit and function of the Cummins part 3955043. This engine variant, often used in various industrial and agricultural applications, relies on the Fuel Supply Tube to maintain its operational integrity.

Integration with Engine Plumbing

In the context of engine plumbing, the Fuel Supply Tube is meticulously integrated into the fuel lines. It connects to the fuel pump at one end and to the fuel rail at the other. This setup ensures that fuel is efficiently pumped from the tank and distributed to the injectors under the correct pressure. The tube’s design allows it to withstand the high pressures and temperatures within the fuel system, maintaining integrity and performance over time.

Interaction with Injectors

The Fuel Supply Tube plays a significant role in the operation of fuel injectors. Once fuel is pumped through the tube and into the fuel rail, it is then delivered to each injector. The injectors rely on a steady and pressurized fuel supply to function correctly. The tube ensures that fuel is available on demand, allowing the injectors to spray fuel into the engine cylinders at the precise moment required for optimal combustion. This timing is essential for engine performance, fuel efficiency, and emissions control.

Ensuring System Reliability

The consistent flow of fuel through the Fuel Supply Tube is vital for the reliability of the entire fuel system. Any interruption or restriction in the tube can lead to inadequate fuel supply to the injectors, resulting in poor engine performance, misfires, or even engine stalling. Therefore, the tube must be in good condition, free from blockages, and properly sealed to maintain the efficiency and reliability of the fuel delivery system.

Conclusion

The 3955043 Fuel Supply Tube by Cummins is a vital component in the fuel delivery system of commercial trucks, ensuring a consistent and reliable supply of fuel to the engine. Its durable construction, precise engineering, and compatibility with Cummins engines make it an essential part for maintaining engine performance and efficiency. Regular maintenance and timely replacement are key to ensuring the longevity and reliability of this Cummins part.