3979419
Injector Fuel Supply Connector
Cummins®

Introduction

The Injector Fuel Supply Connector Assembly, identified by part number 3979419, is a component manufactured by Cummins, a well-established name in the automotive industry. This assembly plays a significant role in the fuel system of heavy-duty trucks, ensuring efficient and reliable fuel delivery to the injectors ¹.

Basic Concepts

Understanding the Injector Fuel Supply Connector Assembly begins with recognizing its function within the fuel delivery system. This component is responsible for connecting the fuel supply line to the injectors, facilitating the transfer of fuel under pressure. Its operation is integral to maintaining consistent fuel flow, which directly influences engine performance and efficiency ³.

Purpose and Role

The primary purpose of the Injector Fuel Supply Connector Assembly is to ensure a secure and leak-free connection between the fuel supply line and the injectors. By doing so, it plays a role in the operation of a truck by enabling precise fuel delivery to the injectors, which is crucial for combustion and engine function. This assembly helps maintain the integrity of the fuel system, ensuring that fuel is delivered at the correct pressure and volume for optimal engine performance ³.

Key Features

The Injector Fuel Supply Connector Assembly is designed with several key features that enhance its performance and reliability. It is constructed from durable materials that can withstand the high pressures and temperatures of the fuel system. The design includes precise fittings and seals that ensure a secure connection, minimizing the risk of leaks. Additionally, the assembly may incorporate features that facilitate easy installation and maintenance, contributing to its overall effectiveness ³.

Benefits

Utilizing the Injector Fuel Supply Connector Assembly in heavy-duty trucks offers several benefits. It contributes to improved fuel efficiency by ensuring that fuel is delivered to the injectors without loss or leakage. This efficient fuel delivery enhances engine performance, allowing for smoother operation and potentially extending the lifespan of the engine. Furthermore, the assembly’s durable construction and reliable performance increase the overall durability of the fuel system ¹.

Installation and Compatibility

Installing the Injector Fuel Supply Connector Assembly requires attention to specific procedures to ensure a secure and effective connection. Compatibility with various truck models and engine types is a consideration, as the assembly must fit within the existing fuel system configuration. Proper installation is crucial for maintaining the integrity of the fuel system and ensuring optimal performance ³.

Maintenance and Troubleshooting

Maintaining the Injector Fuel Supply Connector Assembly is important for ensuring its longevity and performance. Routine inspections can help identify potential issues such as leaks or wear on the fittings and seals. Addressing these issues promptly can prevent more significant problems and ensure the fuel system operates efficiently. Maintenance guidelines may include checking for proper connection, inspecting for signs of wear or damage, and replacing components as necessary ³.

Safety Considerations

Safety is a paramount concern when handling and installing the Injector Fuel Supply Connector Assembly. Proper handling procedures should be followed to avoid accidents or injuries. This includes wearing appropriate personal protective equipment and ensuring that the fuel system is depressurized before beginning any work. Adhering to installation procedures and precautions can help prevent accidents related to fuel leaks or system failures ³.

Environmental Impact

The Injector Fuel Supply Connector Assembly contributes to reducing emissions and promoting fuel efficiency in heavy-duty trucks. By ensuring efficient fuel delivery, it helps minimize fuel waste and reduce the emission of pollutants. This aligns with broader efforts to improve the environmental performance of vehicles and reduce their impact on the environment ¹.

Cummins Overview

Cummins Inc. is a leading manufacturer in the automotive industry, known for its commitment to innovation, quality, and customer satisfaction. With a history of producing reliable and high-performance components, Cummins has established a strong reputation for its product offerings. The company’s dedication to advancing technology and meeting the needs of its customers underscores its position as a trusted provider in the industry ².

Cummins Injector Fuel Supply Connector Assembly (Part 3979419)

The Cummins Injector Fuel Supply Connector Assembly, identified by part number 3979419, is a critical component in the fuel delivery system of several Cummins diesel engines. This assembly is designed to ensure a secure and reliable connection between the fuel supply lines and the injectors, facilitating the efficient delivery of fuel to the engine’s combustion chambers ³.

Compatibility with Cummins Engines

The Injector Fuel Supply Connector Assembly (3979419) is specifically engineered to fit the following Cummins diesel engines:

• B4.5 RGT
• ISB CM850
• QSB5.9 CM850
• QSB6.7 CM850 (CM2850)

Grouping by Engine Series

The engines listed above can be grouped into two main series:

1. QSB Series
   • QSB5.9 CM850
   • QSB6.7 CM850 (CM2850)
2. ISB Series
   • ISB CM850

The QSB series engines, both QSB5.9 CM850 and QSB6.7 CM850 (CM2850), are part of Cummins’ Quanta Series, known for their robust design and high performance in various applications. The ISB CM850, on the other hand, belongs to the Industrial Series, which is widely used in industrial and commercial applications.

The Injector Fuel Supply Connector Assembly (3979419) is designed to meet the specific requirements of these engines, ensuring compatibility and optimal performance. This part is crucial for maintaining the integrity of the fuel system, preventing leaks, and ensuring that the injectors receive the correct amount of fuel for efficient combustion ³.

Role of Part 3979419 Injector Fuel Supply Connector Assembly in Engine Systems

The Injector Fuel Supply Connector Assembly, identified by part number 3979419, is an integral component in the fuel delivery system of an engine. It serves as the vital link between the fuel supply and the injectors, ensuring a consistent and reliable flow of fuel to the combustion chambers ³.

Integration with the Cylinder Head

When installed, the Injector Fuel Supply Connector Assembly interfaces directly with the cylinder head. This connection is essential for maintaining the integrity of the fuel supply line. The assembly ensures that fuel is delivered under the correct pressure and in the right quantity to each injector, which is mounted on the cylinder head. Proper installation and sealing at this junction prevent fuel leaks and ensure optimal engine performance ³.

Connection to Injector Plumbing

The assembly is a key element in the injector plumbing system. It facilitates the transfer of fuel from the main supply lines to the individual injectors. The design of the connector allows for easy attachment and detachment, which is particularly useful during maintenance or upgrades. This feature is especially beneficial when working with performance parts that may require frequent adjustments or replacements ³.

Role in the Long Block

In a long block configuration, which includes the cylinder block, crankshaft, pistons, and cylinder head, the Injector Fuel Supply Connector Assembly plays a significant role. It ensures that the fuel system is correctly integrated with the engine’s core components. This integration is vital for the engine’s overall efficiency and performance, as it directly influences how fuel is delivered to the combustion process ³.

Importance in Long Block Kit

When dealing with a long block kit, which typically includes all the components of a long block plus additional parts like gaskets and seals, the Injector Fuel Supply Connector Assembly is a necessary component. It ensures that the fuel system is correctly assembled and functions as intended. The assembly’s role in maintaining fuel pressure and flow is essential for the proper operation of the engine, especially in high-performance applications ³.

Application in Performance Parts

For those utilizing performance parts, the Injector Fuel Supply Connector Assembly is often a component that requires attention. High-performance engines demand precise fuel delivery to achieve optimal power output and efficiency. The assembly must be compatible with upgraded injectors and fuel systems to handle increased fuel flow rates and pressures. Its role in these systems is to provide a secure and efficient connection point that can withstand the demands of performance driving ³.

Use in Campaign Kit

In the context of a campaign kit, which may include a variety of engine components aimed at improving performance or reliability, the Injector Fuel Supply Connector Assembly is a component that ensures the fuel system’s reliability. It is often included in such kits to guarantee that the fuel delivery system is up to the task of supporting the enhanced performance capabilities of the engine ³.

Conclusion

The Injector Fuel Supply Connector Assembly (Part #3979419) by Cummins is a critical component in the fuel delivery system of heavy-duty trucks and Cummins diesel engines. Its role in ensuring a secure and reliable connection between the fuel supply lines and the injectors is essential for maintaining the integrity of the fuel system, preventing leaks, and ensuring optimal engine performance. The assembly’s design, compatibility with various engine models, and integration with the cylinder head and injector plumbing system highlight its importance in both standard and high-performance applications. Proper installation, maintenance, and attention to safety considerations are crucial for maximizing the benefits of this Cummins part.