3908988
Fuel Supply Tube
Cummins®

Introduction

The Cummins 3908988 Fuel Supply Tube is a critical component in the fuel delivery system of commercial trucks, designed to ensure a consistent and adequate supply of fuel from the tank to the engine. This part plays a significant role in maintaining engine performance and efficiency.

Basic Concepts of Fuel Supply Tubes

A Fuel Supply Tube serves as a conduit within the fuel system, transporting fuel from the tank to the engine. It is essential for maintaining the fuel pressure required for efficient engine operation and contributes to overall performance by ensuring a steady fuel flow. The tube is typically constructed from materials that can withstand the corrosive nature of fuel and the pressures within the system ¹.

Purpose and Role in Truck Operation

The Cummins 3908988 Fuel Supply Tube is integral to the fuel delivery system of a truck. It ensures a consistent flow of fuel to the engine, which is necessary for combustion and power generation. The tube is designed to handle the specific fuel pressure and flow rates required by the engine, contributing to the truck’s efficiency and performance ².

Key Features

The Cummins 3908988 Fuel Supply Tube is characterized by its robust design and the use of high-quality materials. These features enhance its performance and durability, allowing it to withstand the demanding conditions of commercial truck operation. The tube’s design may include features that prevent fuel leaks and ensure a secure connection within the fuel system.

Benefits

Utilizing the Cummins 3908988 Fuel Supply Tube can lead to improved fuel efficiency, as it ensures a consistent and unimpeded flow of fuel to the engine. Its reliable construction contributes to the longevity of the fuel system, reducing the likelihood of failures and the need for frequent replacements. These attributes make it a valuable component for maintaining the operational integrity of commercial trucks.

Installation Process

Installing the Cummins 3908988 Fuel Supply Tube requires careful attention to ensure a secure and proper fit. The process involves disconnecting the old tube, cleaning the connection points, and attaching the new tube with the appropriate fittings. Tools such as wrenches and possibly a fuel system cleaner may be required. It is important to follow manufacturer guidelines to ensure the tube is installed correctly and functions as intended.

Common Issues and Troubleshooting

Issues with the Fuel Supply Tube may include leaks or blockages, which can affect fuel delivery and engine performance. Troubleshooting these problems involves inspecting the tube for signs of wear or damage, checking connections for tightness, and ensuring there are no obstructions within the tube. Addressing these issues promptly can prevent more significant problems and maintain the efficiency of the fuel system.

Maintenance Tips

Regular maintenance of the Cummins 3908988 Fuel Supply Tube is important to ensure its continued reliable operation. This includes periodic inspections for signs of wear or damage, cleaning the tube and connections to prevent buildup, and replacing the tube if it shows signs of significant wear. Adhering to these maintenance practices can help extend the life of the fuel system and maintain truck performance.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and a broad product range, Cummins is renowned for its quality and reliability in the commercial truck industry. The company’s commitment to excellence is reflected in its components, including the Cummins 3908988 Fuel Supply Tube.

Cummins Fuel Supply Tube Part 3908988 Compatibility

The Cummins part number 3908988, a Fuel Supply Tube, is designed to fit seamlessly with several engine models, ensuring optimal fuel delivery and engine performance. This part is integral to the fuel system of the engines it supports, facilitating the transfer of fuel from the fuel tank to the engine’s fuel injectors.

Engine Compatibility

• 4B3.9: The Fuel Supply Tube part 3908988 is engineered to integrate with the 4B3.9 engine, providing a reliable connection for fuel supply. This ensures that the engine receives a consistent and uninterrupted fuel flow, which is crucial for maintaining engine efficiency and performance.

• 6B5.9: Similarly, the part 3908988 is also compatible with the 6B5.9 engine. Its design allows for precise fuel delivery, which is essential for the engine’s operation. The tube’s construction ensures that it can withstand the pressures and conditions within the engine’s fuel system, contributing to the engine’s overall reliability and longevity.

By ensuring that the Fuel Supply Tube part 3908988 fits these engines, Cummins maintains a high standard of quality and compatibility, making it a reliable choice for engine maintenance and repair.

Role of Part 3908988 Fuel Supply Tube in Engine Systems

The 3908988 Fuel Supply Tube is an integral component in the fuel delivery system of various engine setups. It is responsible for transporting fuel from the fuel tank to the fuel filter, ensuring a consistent and reliable fuel flow to the engine.

Integration with Fuel Filter

The Fuel Supply Tube connects directly to the fuel filter, which is essential for removing impurities and contaminants from the fuel before it reaches the engine. This connection ensures that the fuel filter receives a steady supply of fuel, allowing it to perform its filtration duties effectively.

Interaction with Fuel Filter Plumbing

In systems where fuel filter plumbing is utilized, the Fuel Supply Tube plays a significant role. It interfaces with the plumbing to create a sealed and efficient pathway for fuel. This setup helps maintain the integrity of the fuel line, preventing leaks and ensuring that the fuel reaches the filter under the correct pressure.

Compatibility with Fuel Pump Conversion Kit

When a Fuel Pump Conversion Kit is installed, the Fuel Supply Tube must be compatible to ensure seamless integration. The tube facilitates the transfer of fuel from the newly configured fuel pump to the fuel filter, supporting the kit’s function in enhancing fuel delivery efficiency and pressure.

Overall Function in Fuel Supply System

The 3908988 Fuel Supply Tube is a key element in the overall fuel supply system. It works in conjunction with the fuel filter, fuel filter plumbing, and fuel pump conversion kit to ensure that the engine receives clean, pressurized fuel. This reliable fuel delivery is essential for the engine’s performance and longevity.

Conclusion

The Cummins 3908988 Fuel Supply Tube is a vital component in the fuel delivery system of commercial trucks, ensuring consistent and reliable fuel flow to the engine. Its robust design, compatibility with various engine models, and integration with other fuel system components make it an essential part for maintaining engine performance and efficiency.