3406702
Injector Sleeve
Cummins®

Introduction

The Cummins Injector Sleeve Part #3406702 is a component designed for use in commercial trucks. It plays a role in the fuel injection system, contributing to the efficient operation of the engine. This part is integral to maintaining the performance and reliability of the truck’s engine, ensuring that fuel is delivered accurately and efficiently to the combustion chamber.

Basic Concepts of Injector Sleeves

An injector sleeve is a cylindrical component that houses the fuel injector within the engine’s cylinder head. Its function is to provide a secure and precise fit for the injector, allowing for optimal fuel delivery. The injector sleeve contributes to the overall performance of the engine by ensuring that fuel is injected into the combustion chamber at the correct pressure and angle, which is vital for efficient combustion and engine operation ¹.

Role of the Injector Sleeve in Truck Operation

This Cummins part facilitates the accurate delivery of fuel into the engine’s cylinders. It interacts with other engine components, such as the fuel injector and cylinder head, to ensure that fuel is delivered at the precise moment and in the correct quantity. This interaction impacts fuel delivery and combustion efficiency, which are important for the engine’s performance and the truck’s overall operation ².

Key Features of the 3406702 Injector Sleeve

The Cummins Injector Sleeve Part #3406702 is characterized by several key features that enhance its performance and durability. These include its material composition, which is designed to withstand the high pressures and temperatures within the engine, and its precise design specifications that ensure a secure fit for the fuel injector. Additionally, the sleeve may possess unique attributes that further improve its functionality within the fuel injection system.

Benefits of Using the 3406702 Injector Sleeve

Using this Cummins part can result in several benefits for the operation of a commercial truck. These include improved fuel efficiency, as the precise fit and secure housing of the fuel injector allow for more accurate fuel delivery. Enhanced engine performance is another benefit, as the efficient combustion facilitated by the injector sleeve can lead to increased power output. Additionally, the durability and reliability of the injector sleeve contribute to the overall reliability of the truck’s engine.

Troubleshooting Common Issues with Injector Sleeves

Common problems related to injector sleeves can include leaks, wear, and improper seating. Identifying these issues early can help prevent more significant engine problems. Recommended practices for addressing these issues include regular inspection of the injector sleeve for signs of wear or damage, ensuring proper seating of the fuel injector within the sleeve, and performing maintenance as needed to ensure optimal performance.

Maintenance Tips for Injector Sleeves

To prolong the lifespan of injector sleeves and ensure consistent engine performance, regular maintenance is recommended. This includes inspecting the injector sleeve for signs of wear or damage, cleaning the sleeve and surrounding components to remove any buildup that could affect performance, and replacing the sleeve according to the manufacturer’s recommendations or when signs of wear are detected.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and quality, Cummins has established a strong reputation in the commercial truck industry. The company’s commitment to developing reliable and efficient engine components, such as the 3406702 Injector Sleeve, underscores its dedication to enhancing the performance and reliability of commercial vehicles.

Cummins Injector Sleeve Part 3406702 Compatibility

The Injector Sleeve part number 3406702 is a component in the fuel injection system of various Cummins engines. This part is designed to ensure precise fuel delivery, which is important for optimal engine performance and efficiency. Below is a detailed description of how this part fits with the specified engines:

N14 CELECT and N14 CELECT PLUS Engines

The N14 CELECT and N14 CELECT PLUS engines are both advanced versions of the N14 engine, featuring electronic controls for improved performance and emissions compliance. The injector sleeve part 3406702 is integral to these engines, providing a secure and reliable interface between the injector and the cylinder head. This ensures that the injector can operate without leaks, maintaining the integrity of the fuel injection system.

N14 MECHANICAL Engine

The N14 MECHANICAL engine, as the name suggests, relies on mechanical controls rather than electronic systems. Despite the difference in control systems, the injector sleeve part 3406702 serves the same function in this engine. It provides a robust connection between the injector and the cylinder head, ensuring that the injector can deliver fuel with precision and reliability.

NH/NT 855 Engine

The NH/NT 855 engine is part of the Cummins B-Series engine family, known for its durability and performance in heavy-duty applications. The injector sleeve part 3406702 is designed to fit seamlessly into this engine, providing a critical seal that prevents fuel leaks and ensures efficient fuel delivery. This compatibility is crucial for maintaining the engine’s performance and longevity.

QSN14 CM876 N103 and QSNT14 CM876 N102 Engines

Both the QSN14 CM876 N103 and QSNT14 CM876 N102 engines are part of the Cummins QSN/QSNT series, which are designed for military and heavy-duty applications. The injector sleeve part 3406702 is engineered to meet the stringent requirements of these engines, providing a reliable and durable connection that can withstand the demanding conditions these engines often operate under.

V28 Engine

The V28 engine is another member of the Cummins B-Series family, known for its robust design and high performance. The injector sleeve part 3406702 is compatible with the V28 engine, ensuring that the injector can deliver fuel with the precision needed for optimal engine operation. This compatibility is essential for maintaining the engine’s efficiency and reliability.

Role of Part 3406702 Injector Sleeve in Engine Systems

The injector sleeve, identified by part number 3406702, is an integral component within the fuel injection system of an engine. It is specifically designed to house the injector within the cylinder head, ensuring a precise and secure fit. This component facilitates the efficient delivery of fuel into the combustion chamber, interacting closely with several other engine components to maintain optimal performance.

Interaction with Key Engine Components

• Cylinder Head and Cylinder (Top Level Assembly) Head: The injector sleeve is installed within the cylinder head, providing a pathway for the fuel injector to penetrate and deliver fuel directly into the combustion chamber. This ensures that the fuel is atomized correctly for efficient combustion.

• Injector and Injector Plumbing: The sleeve acts as a guide and seal for the injector, maintaining the integrity of the fuel path from the injector plumbing to the combustion chamber. It ensures that fuel is delivered under the correct pressure and at the precise moment required for combustion.

• Cam Follower Housing and Camshaft: Although not directly connected, the timing of fuel injection is synchronized with the camshaft’s operation. The camshaft and gear dictate the opening and closing of the valves, which in turn affects the injection timing managed by the injector sleeve.

• Connecting Rod and Piston, Crosshead: The efficient combustion facilitated by the injector sleeve contributes to the power delivered to the connecting rod and piston assembly. This power is then transferred through the crosshead, enhancing the engine’s overall performance.

• Lubricating Oil Cooler Mounting: Proper fuel injection and combustion reduce the formation of deposits and carbon buildup, which can otherwise affect the efficiency of the lubricating oil cooler. The injector sleeve, by ensuring efficient fuel delivery, indirectly supports the maintenance of optimal lubrication conditions.

• Turbocharger: Enhanced combustion efficiency leads to better exhaust gas flow, which is crucial for the operation of the turbocharger. The turbocharger relies on the momentum of exhaust gases to spin the turbine, compressing incoming air and thus increasing engine power output.

• EBM: Performance Parts and Dataplate: The use of high-quality injector sleeves, such as part 3406702, is often highlighted in performance parts catalogs and dataplates. These components are essential for achieving the performance metrics advertised for enhanced engine systems.

Conclusion

In summary, the injector sleeve plays a role in the fuel injection process, interacting with various engine components to ensure efficient combustion and optimal engine performance. Regular maintenance and proper installation of this part are crucial for the longevity and efficiency of the engine.