3979403
Fuel Supply Tube
Cummins®

Introduction

The Cummins 3979403 Fuel Supply Tube is a component designed for use in the fuel systems of heavy-duty trucks. Its primary role is to facilitate the transfer of fuel from the tank to the engine, ensuring a consistent and reliable fuel supply. This component is integral to the overall efficiency and performance of the vehicle’s fuel system.

Purpose and Function

The Cummins 3979403 Fuel Supply Tube plays a significant role in the fuel delivery process. It is responsible for transporting fuel from the tank to the engine, maintaining a steady flow and pressure. This consistent delivery is vital for the engine’s combustion process, directly influencing the truck’s performance and fuel efficiency ¹.

Key Features

The design and construction of the Cummins 3979403 Fuel Supply Tube are tailored for durability and efficiency. It is made from high-quality materials that resist corrosion and wear, ensuring longevity in demanding environments. The tube’s construction includes features that enhance its performance, such as precise engineering for optimal fuel flow and robust connections for secure installation ².

Benefits

Utilizing the Cummins 3979403 Fuel Supply Tube offers several advantages. It contributes to improved fuel efficiency by ensuring a consistent fuel supply to the engine. The tube’s reliable design enhances the overall reliability of the fuel system. Additionally, it is specifically engineered for compatibility with Cummins engines, ensuring seamless integration and optimal performance ³.

Installation and Compatibility

Proper installation of the Cummins 3979403 Fuel Supply Tube is crucial for its effective function. The installation process requires specific tools and should follow manufacturer guidelines to ensure a secure fit. This component is designed to be compatible with a range of Cummins engine models, providing versatility for various heavy-duty truck applications.

Maintenance and Troubleshooting

Regular maintenance of the Cummins 3979403 Fuel Supply Tube is important for its longevity and optimal performance. This includes periodic inspections for signs of wear or damage and ensuring all connections are secure. Common issues may include fuel leaks or inconsistent fuel flow, which can often be addressed by checking connections and replacing worn components.

Safety Considerations

When handling and installing the Cummins 3979403 Fuel Supply Tube, it is important to adhere to safety practices. This includes working in a well-ventilated area, avoiding sparks or open flames near the fuel system, and following all manufacturer safety guidelines. Understanding the potential hazards associated with fuel systems is crucial for safe and effective maintenance and installation.

Cummins Overview

Cummins Inc. is a renowned manufacturer in the automotive industry, particularly known for its high-quality diesel engines and components. With a rich history of innovation and excellence, Cummins has established a strong reputation for producing reliable and efficient engine parts. The company’s commitment to quality and performance is evident in its wide range of products, including the Cummins 3979403 Fuel Supply Tube.

Compatibility with Cummins Engines

The Cummins Fuel Supply Tube 3979403 is designed to fit seamlessly with a range of Cummins engines, ensuring efficient fuel delivery and optimal engine performance. Here’s how this part integrates with the specified engines:

ISC CM2150 and ISL CM2150

The ISC CM2150 and ISL CM2150 engines are part of Cummins’ mid-range power series, known for their robust performance in various applications. The fuel supply tube 3979403 is engineered to interface with the fuel systems of these engines, providing a reliable conduit for fuel from the tank to the injection system. This ensures consistent fuel pressure and flow, which is critical for maintaining engine efficiency and power output.

ISL9 CM2150 SN

The ISL9 CM2150 SN engine, which is a variant of the ISL series, benefits from the precise engineering of the fuel supply tube 3979403. This part is specifically designed to fit the unique fuel system architecture of the ISL9 series, ensuring that fuel delivery is both efficient and reliable. The tube’s design accommodates the specific requirements of this engine model, including any modifications or enhancements that may be present in the SN variant.

QSC8.3 CM850 (CM2850) and QSL8.9 CM2150 L141

The QSC8.3 CM850 (CM2850) and QSL8.9 CM2150 L141 engines are part of Cummins’ heavy-duty lineup, designed for demanding applications. The fuel supply tube 3979403 is compatible with these engines, providing a critical link in the fuel delivery system. This part is engineered to handle the higher fuel flow rates and pressures required by these heavy-duty engines, ensuring that they operate at peak efficiency.

QSL9 CM850 (CM2850)

The QSL9 CM850 (CM2850) engine, another member of Cummins’ heavy-duty series, also integrates the fuel supply tube 3979403. This part is designed to fit the specific fuel system requirements of the QSL9 model, ensuring that fuel delivery is both robust and reliable. The tube’s design takes into account the unique characteristics of this engine, providing a seamless fit and function.

By ensuring compatibility with these various engine models, the Cummins Fuel Supply Tube 3979403 plays a crucial role in maintaining the performance and reliability of Cummins engines across different applications and power ranges.

Role of 3979403 Fuel Supply Tube in Engine Systems

The 3979403 Fuel Supply Tube is an integral component in the fuel delivery system of an engine. It is responsible for transporting fuel from the fuel tank to the engine’s fuel injectors or carburetor. This seamless fuel transport is essential for maintaining consistent engine performance.

Integration with Plumbing

In the context of engine plumbing, the Fuel Supply Tube connects to various fuel lines and components. It interfaces with the fuel pump, which pressurizes the fuel, and the fuel filter, which removes impurities. The tube ensures a steady flow of clean, pressurized fuel to the engine. Proper installation and maintenance of the Fuel Supply Tube are necessary to prevent fuel leaks and ensure efficient fuel delivery.

Interaction with Engine Control Module (ECM)

The Engine Control Module (ECM) plays a significant role in regulating the fuel supply to the engine. The ECM monitors various parameters such as engine load, RPM, and air-fuel ratio. Based on these inputs, it adjusts the fuel delivery to optimize engine performance and efficiency. The Fuel Supply Tube works in conjunction with the ECM by providing a reliable pathway for fuel to reach the injectors. Any issues with the tube can lead to inconsistent fuel delivery, which the ECM may attempt to compensate for by adjusting other parameters, potentially leading to decreased performance or increased emissions.

Conclusion

The Cummins 3979403 Fuel Supply Tube is a critical component in the fuel delivery system of heavy-duty trucks. Its design and construction ensure durability, efficiency, and compatibility with a range of Cummins engines. Proper installation, maintenance, and adherence to safety practices are essential for optimal performance and longevity of this part.