3964143
Injector Fuel Supply Tube
Cummins®

The Cummins Injector Fuel Supply Tube, identified by part number 3964143, is a critical component in the fuel system of heavy-duty trucks. Manufactured by Cummins Inc., a leader in diesel engines and related technologies, this part ensures the efficient delivery of fuel within the engine’s fuel injection system. Its design and functionality are tailored to meet the demanding requirements of commercial vehicle operations, contributing to the overall performance and reliability of Cummins-powered trucks ¹.

Function and Operation

The Injector Fuel Supply Tube operates as a conduit within the fuel injection system, facilitating the transfer of fuel from the fuel rail to the injector. This tube ensures a consistent and pressurized flow of fuel, which is essential for the precise operation of the fuel injectors. By maintaining a stable fuel supply, it enables the injectors to deliver fuel into the combustion chamber at the optimal moment and in the correct quantity, thereby supporting efficient combustion and engine performance ².

Purpose of the Injector Fuel Supply Tube

The primary role of the Injector Fuel Supply Tube in a truck’s operation is to contribute to the efficient delivery of fuel, which is fundamental to engine performance. It ensures that fuel is supplied to the injectors under the correct pressure and at the right time, which is vital for the engine’s combustion process. This consistent fuel delivery helps in achieving better fuel efficiency, smoother engine operation, and overall enhanced performance of the vehicle ³.

Key Features

The Cummins Injector Fuel Supply Tube is characterized by several key features that enhance its functionality. It is constructed from durable materials designed to withstand the high pressures and temperatures within the fuel system. The tube’s design includes precise engineering to ensure a secure fit within the fuel system, minimizing the risk of leaks. Additionally, its construction may incorporate features that reduce the likelihood of blockages, ensuring a reliable fuel supply to the injectors ⁴.

Benefits

The Cummins Injector Fuel Supply Tube offers several advantages that contribute to the overall efficiency and performance of the engine. By ensuring a consistent and pressurized fuel supply, it supports more efficient fuel combustion, which can lead to improved fuel efficiency. Furthermore, its reliable operation under demanding conditions helps maintain engine performance and durability, making it a valuable component for heavy-duty applications ⁵.

Installation and Compatibility

Proper installation of the Injector Fuel Supply Tube is crucial for its effective operation and the overall performance of the fuel system. Installation procedures should follow manufacturer guidelines to ensure compatibility with Cummins engines. This includes verifying the tube’s fit within the fuel system and securing it in place to prevent leaks or disconnections. Compatibility with specific engine models should be confirmed to ensure optimal performance and reliability ⁶.

Maintenance and Troubleshooting

Routine maintenance of the Injector Fuel Supply Tube involves inspecting it for signs of wear, leaks, or blockages. Regular checks can help identify issues before they lead to more significant problems. Troubleshooting common issues, such as fuel leaks or blockages, may involve cleaning the tube, checking for proper fitment, or replacing damaged components. Adhering to maintenance schedules and addressing issues promptly can help ensure the longevity and reliability of the fuel system ⁷.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including diesel and natural gas engines, as well as related technologies. With a history spanning over a century, Cummins has established a reputation for quality, innovation, and reliability in the automotive industry. The company’s commitment to manufacturing high-quality components for commercial vehicles underscores its dedication to enhancing the performance, efficiency, and reliability of the vehicles it powers ⁸.

Compatibility of the Cummins Injector Fuel Supply Tube (Part 3964143)

The Cummins Injector Fuel Supply Tube, identified by part number 3964143, is a critical component in the fuel delivery system of several engine models. This part is designed to ensure efficient and reliable fuel flow to the injectors, which is essential for optimal engine performance.

Compatible Engines

• ISC CM2150
• ISC CM850
• ISL9 CM2150 SN
• QSC8.3 CM850 (CM2850)
• QSL8.9 CM2150 L141
• QSL9 CM850 (CM2850)

Grouping by Engine Series

ISC Series:

• ISC CM2150
• ISC CM850

The ISC series engines are known for their robust design and high performance, making them suitable for a variety of applications. The injector fuel supply tube in these engines ensures that the fuel is delivered precisely to the injectors, enhancing combustion efficiency and reducing emissions.

ISL Series:

• ISL9 CM2150 SN

The ISL series engines are designed for heavy-duty applications, providing exceptional power and durability. The injector fuel supply tube in the ISL9 CM2150 SN engine is engineered to withstand the rigors of demanding environments, ensuring consistent fuel delivery and engine reliability.

QSC and QSL Series:

• QSC8.3 CM850 (CM2850)
• QSL8.9 CM2150 L141
• QSL9 CM850 (CM2850)

The QSC and QSL series engines are engineered for both on-highway and off-highway applications. The injector fuel supply tube in these engines is designed to meet the stringent requirements of these diverse operating conditions, ensuring that the engines perform reliably under various loads and speeds.

Role of Part 3964143 Injector Fuel Supply Tube in Engine Systems

The Injector Fuel Supply Tube, identified by part number 3964143, is a critical component in the fuel delivery system of an engine. It is responsible for transporting pressurized fuel from the fuel manifold to the individual injectors. This part ensures a consistent and reliable fuel supply, which is fundamental for the injectors to function correctly.

Integration with Engine Components

1. Fuel Manifold: The Injector Fuel Supply Tube connects directly to the fuel manifold, which distributes fuel to all injectors. This connection ensures that each injector receives an equal amount of fuel under pressure.

2. Injector Plumbing: This tube is a key element in the injector plumbing system. It routes fuel from the manifold to the injectors, maintaining the integrity of the fuel path and preventing leaks or restrictions that could affect engine performance.

3. Cylinder Head: Positioned above the cylinder head, the Injector Fuel Supply Tube works in conjunction with the cylinder head to deliver fuel precisely when needed. The cylinder head houses the injectors, and the tube ensures they are supplied with fuel at the correct pressure and timing.

4. Injectors: The primary role of the Injector Fuel Supply Tube is to deliver fuel to the injectors. Each injector sprays a fine mist of fuel into the combustion chamber, where it mixes with air and is ignited by the spark plug. The tube’s design and material are chosen to withstand high pressures and temperatures, ensuring reliable fuel delivery.

5. Camshaft and Connecting Rod and Piston: Although not directly connected, the efficient operation of the Injector Fuel Supply Tube influences the performance of the camshaft, connecting rod, and piston. Proper fuel delivery ensures optimal combustion, which directly affects the timing and efficiency of the camshaft’s valve operation and the movement of the connecting rod and piston.

Impact on Engine Performance

The Injector Fuel Supply Tube plays a significant role in maintaining engine performance. By ensuring a steady and pressurized fuel supply to the injectors, it contributes to consistent combustion, which is essential for engine efficiency, power output, and emissions control. Any malfunction or blockage in this tube can lead to uneven fuel distribution, affecting engine performance and potentially causing damage to other components.

Conclusion

The Cummins Injector Fuel Supply Tube (part number 3964143) is a vital component in the fuel delivery system of heavy-duty engines. Its role in ensuring a consistent and pressurized fuel supply to the injectors is crucial for maintaining engine performance, efficiency, and reliability. Proper installation, regular maintenance, and understanding its integration with other engine components are essential for maximizing the benefits of this Cummins part.