4988677
Fuel Supply Tube
Cummins®

The Cummins 4988677 Fuel Supply Tube is a component designed for use in the fuel systems of heavy-duty trucks. Its purpose is to facilitate the transfer of fuel from the tank to the engine, ensuring a consistent and reliable fuel supply that is vital for the operation of the vehicle ².

Basic Concepts of Fuel Supply Tubes

A fuel supply tube is a conduit within the fuel delivery system that transports fuel from the tank to the engine. It operates under pressure and must be constructed to withstand the demands of the fuel it carries. In the context of a truck’s engine, the fuel supply tube is a critical link in the chain of components that deliver fuel efficiently and effectively to the combustion chambers ¹.

Purpose of the Cummins 4988677 Fuel Supply Tube

The Cummins 4988677 Fuel Supply Tube plays a specific role in the operation of a truck by delivering fuel from the tank to the engine. It is engineered to maintain the integrity of the fuel as it travels, ensuring that the engine receives a clean and consistent fuel supply which is necessary for optimal performance ².

Key Features

The Cummins 4988677 Fuel Supply Tube is characterized by several key features that enhance its performance and durability. These include its material composition, which is selected for its resistance to corrosion and wear, and its design elements, which may include reinforced sections to handle the pressure of the fuel system. Unique characteristics such as precise engineering tolerances ensure a secure fit within the truck’s fuel system ².

Benefits

Using the Cummins 4988677 Fuel Supply Tube offers several benefits. It contributes to improved fuel efficiency by ensuring a smooth and uninterrupted fuel flow. Its reliability is a key factor in maintaining consistent engine performance, and its compatibility with Cummins engines ensures that it integrates seamlessly into the fuel system, providing a dependable component for heavy-duty applications ².

Installation and Integration

Proper installation of the Cummins 4988677 Fuel Supply Tube is important for the efficient operation of the truck’s fuel system. Guidelines for installation include ensuring a secure connection to both the fuel tank and the engine, and checking for any signs of damage or wear that could affect performance. It is also important to follow manufacturer recommendations for torque specifications and sealing procedures to prevent leaks and ensure a proper fit ².

Troubleshooting and Maintenance

To maintain optimal performance and longevity of the Cummins 4988677 Fuel Supply Tube, regular maintenance is recommended. This includes inspecting the tube for signs of wear, corrosion, or leaks, and replacing it if necessary. Troubleshooting common issues may involve checking for obstructions in the fuel line, ensuring proper connections, and verifying that the fuel filter is clean and functioning correctly ².

Safety Considerations

When working with the Cummins 4988677 Fuel Supply Tube, it is important to observe safety considerations to prevent fuel leaks or other hazards. This includes wearing appropriate personal protective equipment, ensuring proper ventilation when working with fuel systems, and following all manufacturer guidelines for handling and installation. It is also crucial to be aware of the flammable nature of fuel and to take precautions to avoid sparks or ignition sources near the fuel system ².

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration, and emissions technologies. With a history of innovation and a reputation for quality, Cummins is committed to providing reliable and efficient components for the automotive and heavy-duty truck industries. The company’s dedication to excellence is reflected in its products, which are designed to meet the demanding requirements of modern transportation ².

Cummins Fuel Supply Tube 4988677 Compatibility

The Cummins Fuel Supply Tube part number 4988677 is designed to fit a variety of Cummins engines, ensuring a seamless integration for fuel delivery systems. This part is compatible with the following engines:

ISB/ISD Series

• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN
• ISD4.5 CM2220 D108

These engines, part of the ISB/ISD series, benefit from the precise fuel delivery facilitated by the 4988677 Fuel Supply Tube. This part ensures optimal fuel flow, enhancing engine performance and efficiency ².

ISBE Series

• ISBE CM2150
• ISBE4 CM850

The ISBE series engines, including the ISBE CM2150 and ISBE4 CM850, are also compatible with the 4988677 Fuel Supply Tube. This compatibility ensures that these engines receive the necessary fuel supply for smooth operation ².

QSB Series

• QSB4.5 CM850 (CM2850)
• QSB6.7 CM850 (CM2850)
• QSB7 CM2880 B117

The QSB series engines, such as the QSB4.5 CM850 (CM2850), QSB6.7 CM850 (CM2850), and QSB7 CM2880 B117, are also designed to work with the 4988677 Fuel Supply Tube. This part is crucial for maintaining the fuel delivery system’s integrity, ensuring these engines operate at peak performance ².

Role of Part 4988677 Fuel Supply Tube in Engine Systems

The 4988677 Fuel Supply Tube is an integral 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 regulated flow of fuel, which is essential for the engine’s performance and efficiency ¹.

In modern fuel-injected engines, the Fuel Supply Tube connects to the fuel pump, which pressurizes the fuel before it is delivered to the fuel injectors. The injectors then spray the fuel into the combustion chambers in a fine mist, allowing for precise control over the air-fuel mixture. This results in improved fuel economy, reduced emissions, and enhanced engine performance ¹.

In carbureted engines, the Fuel Supply Tube delivers fuel to the carburetor, where it is mixed with air before entering the engine’s cylinders. The carburetor uses a series of jets and passages to meter the fuel and air, ensuring the correct mixture for combustion. The Fuel Supply Tube must be able to handle the varying fuel demands of the engine, providing a steady supply of fuel under all operating conditions ¹.

The Fuel Supply Tube also plays a role in the engine’s fuel return system. In many fuel-injected engines, excess fuel is returned to the tank via a separate return line. This helps to maintain a consistent fuel pressure and temperature, ensuring optimal engine performance and longevity ¹.

In addition to its role in the fuel system, the Fuel Supply Tube may also be connected to various sensors and components within the engine’s electronic control unit (ECU). These connections allow the ECU to monitor fuel pressure, temperature, and flow rate, enabling it to make real-time adjustments to the engine’s operation for optimal performance and efficiency ¹.

Overall, the 4988677 Fuel Supply Tube is a vital component in the fuel delivery system of various engine configurations. Its role in transporting fuel, maintaining consistent pressure and temperature, and providing feedback to the engine’s control systems ensures that the engine operates at its best, delivering the power and efficiency that users expect ¹.

Conclusion

The Cummins 4988677 Fuel Supply Tube is a critical component in the fuel delivery system of heavy-duty trucks. Its design and features ensure a reliable and efficient fuel supply, contributing to the overall performance and efficiency of the engine. Proper installation, maintenance, and safety considerations are essential to maximize the benefits of this Cummins part ².