4940552
Fuel Supply Tube
Cummins®

Introduction

The Cummins 4940552 Fuel Supply Tube is a critical component in the fuel systems of heavy-duty trucks. It ensures the efficient transfer of fuel from the tank to the engine, maintaining a consistent and reliable fuel supply essential for the engine’s performance and efficiency.

Basic Concepts of Fuel Supply Tubes

A fuel supply tube is a conduit within the fuel system that transports fuel from the tank to the engine. It is vital for the operation of a diesel engine, ensuring fuel is delivered under the correct pressure and in the right quantity to support combustion. The tube maintains a steady fuel flow, which is necessary for consistent engine performance ¹.

Purpose of the Cummins 4940552 Fuel Supply Tube

This Cummins part provides a pathway for fuel to travel from the tank to the engine. It ensures that fuel is supplied consistently, which is important for the engine’s combustion process. The tube’s design helps to maintain the integrity of the fuel as it moves through the system, contributing to the engine’s efficiency and performance.

Key Features

The Cummins 4940552 is constructed from materials resistant to the corrosive effects of diesel fuel, ensuring durability and longevity. Its design includes precise fittings that ensure a secure connection within the fuel system. The tube’s flexibility and strength contribute to its ability to withstand the demands of heavy-duty truck applications.

Benefits of Using the Cummins 4940552 Fuel Supply Tube

Using this part can lead to improved fuel efficiency, as it is designed to deliver fuel with minimal loss or contamination. Its reliability is enhanced by its construction and design, which are tailored to the specific requirements of Cummins engines. Compatibility with these engines ensures that the tube integrates seamlessly into the fuel system, contributing to overall vehicle performance.

Installation and Compatibility

Proper installation of the Cummins 4940552 involves following manufacturer guidelines to ensure it is correctly positioned within the fuel system. Compatibility with various Cummins engine models is a key consideration, as the tube is designed to work with specific engine configurations to ensure optimal performance.

Maintenance and Troubleshooting

Maintaining the Cummins 4940552 includes regular inspection for signs of wear or damage. Common issues that may arise include leaks or blockages, which can be addressed through troubleshooting procedures that involve checking connections and ensuring the tube is free from obstructions. Regular maintenance helps to ensure that the tube continues to perform effectively within the fuel system.

Safety Considerations

When working with the fuel supply system and the Cummins 4940552, it is important to follow safety practices. This includes handling fuel with care to avoid spills and ensuring that maintenance tasks are performed in a well-ventilated area. Adhering to safety guidelines helps to protect both the technician and the equipment during maintenance procedures.

Cummins Overview

Cummins Inc. is a well-established manufacturer of diesel engines and related components, with a history of innovation and quality in the industry. The company’s reputation is built on its commitment to producing reliable and efficient engine solutions for a variety of applications, including heavy-duty trucks. Cummins’ expertise in engine technology is reflected in the design and performance of components like the 4940552 Fuel Supply Tube.

Engines Compatible with Part 4940552

This part is designed to fit into several engine models within the Cummins lineup. It is integral to the fuel delivery system, ensuring that fuel is efficiently and safely transported from the fuel tank to the engine’s fuel injection system.

Engines Compatible with Part 4940552:

• B6.7 CM2670 B153B
• B6.7 CM2670 B164C
• ISB/ISD 6.7 CM2150 SN
• ISBE CM2150
• ISBE4 CM850
• QSB6.7 CM850 (CM2850)
• QSB6.7 M CM2250
• QSB7 CM2880 B117

These engines, while differing in their specific applications and configurations, share a commonality in their fuel supply requirements. The Fuel Supply Tube (part number 4940552) is engineered to meet these requirements, ensuring a consistent and reliable fuel flow across the various engine models. This part’s compatibility across multiple engine types underscores its versatility and the importance of maintaining fuel system integrity across different engine platforms.

Role of Part 4940552 Fuel Supply Tube in Engine Systems

The part 4940552 Fuel Supply Tube is a critical 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 ensures a consistent and reliable fuel supply, which is fundamental for the engine’s performance and efficiency.

Integration with Fuel System Components

1. Fuel Tank: The Fuel Supply Tube connects directly to the fuel tank, where it draws fuel. This connection is typically secured with fittings that prevent leaks and ensure a tight seal.

2. Fuel Filter: Before reaching the engine, the fuel passes through a fuel filter. The Fuel Supply Tube delivers the fuel to the filter, where contaminants are removed to protect the engine’s sensitive components.

3. Fuel Pump: In systems equipped with a fuel pump, the Fuel Supply Tube may connect post-pump to ensure pressurized fuel delivery. This pressurized flow is vital for modern fuel injection systems.

4. Fuel Injectors/Carburetor: The tube terminates at the fuel injectors in fuel-injected engines or at the carburetor in older engine designs. This final connection ensures that the fuel is metered and delivered precisely to the combustion chambers.

Role in Plumbing Systems

In the context of engine plumbing, the Fuel Supply Tube is part of a broader network that includes:

• Return Lines: In some systems, excess fuel is returned to the tank via return lines. The Fuel Supply Tube works in conjunction with these lines to maintain fuel pressure and temperature.

• Vapor Lines: Connected to the fuel tank, these lines manage fuel vapors, ensuring they are either vented or recirculated. The Fuel Supply Tube indirectly supports this system by maintaining consistent fuel levels and pressure.

• Sensor Lines: Modern engines often include fuel level sensors and pressure sensors. The Fuel Supply Tube facilitates the accurate reading of these sensors by ensuring a stable fuel flow.

Ensuring System Integrity

The Fuel Supply Tube must be robust and resistant to fuel corrosion to maintain the integrity of the fuel system. It is often made from materials like reinforced rubber or metal to withstand the pressures and temperatures within the engine compartment.

Conclusion

In summary, the part 4940552 Fuel Supply Tube plays a significant role in the efficient and reliable operation of engine fuel systems. Its proper installation and maintenance are key to ensuring optimal engine performance.