4003914
Rocker Lever
Cummins®

Introduction

The 4003914 Rocker Lever by Cummins is a component designed for use in commercial truck engines. It serves a specific purpose within the engine’s valve train mechanism, contributing to the overall operation and performance of the truck. This part is integral to the engine’s functionality, ensuring that the valves open and close at the correct times to allow for the intake and exhaust of gases.

Basic Concepts of Rocker Levers

A rocker lever, also known as a rocker arm, is a pivotal component in an engine’s valve train. It acts as a mechanical lever that translates the motion from the camshaft into the opening and closing of the engine’s valves. The rocker lever’s design allows it to amplify the camshaft’s motion, ensuring that the valves move with the necessary force and precision. This mechanism is vital for the engine’s operation, as it directly affects the engine’s ability to breathe—taking in air and fuel and expelling exhaust gases ¹.

Role of the 4003914 Rocker Lever in Truck Operation

The 4003914 Rocker Lever by Cummins plays a role in the engine’s valve train by connecting the camshaft to the valves. As the camshaft rotates, it pushes against the rocker lever, which then pivots and pushes down on the valve, opening it. Once the camshaft lobe moves past the rocker lever, a return spring pulls the valve back into its closed position. This process is repeated for each valve in the engine, synchronized with the camshaft’s rotation. The 4003914 Rocker Lever’s design ensures that this process is efficient and reliable, contributing to the engine’s overall performance ².

Key Features

The 4003914 Rocker Lever is characterized by its robust design and material composition, which are tailored to withstand the high stresses and temperatures within a commercial truck engine. It is crafted from high-quality materials that offer durability and resistance to wear. The lever’s geometry is optimized for minimal friction and maximum efficiency, ensuring that the valve train operates smoothly. Additionally, the 4003914 Rocker Lever may feature specific design elements that enhance its performance, such as precision-machined surfaces for better contact with the camshaft and valves ³.

Benefits

The use of the 4003914 Rocker Lever in commercial truck engines can lead to improved engine efficiency and reliability. Its design and material characteristics contribute to reduced wear and longer component life, which can translate into lower maintenance costs and increased uptime for the vehicle. Furthermore, the efficient operation of the valve train facilitated by the 4003914 Rocker Lever can enhance the engine’s performance, potentially leading to better fuel economy and power output ⁴.

Troubleshooting and Maintenance

Common issues with rocker levers can include wear, improper clearance, or failure due to material fatigue. Diagnosing problems with rocker levers involves checking for signs of wear on the lever and its contact points, ensuring proper clearance between the lever and other components, and verifying that the lever operates smoothly without excessive noise or vibration. Regular maintenance practices, such as inspecting and replacing worn components, can help ensure the longevity and proper function of the 4003914 Rocker Lever ⁵.

Compatibility of Rocker Lever Part 4003914 with Cummins Engines

The Cummins Rocker Lever part number 4003914 is designed to fit a variety of Cummins engines, ensuring compatibility across multiple models. Here is a detailed overview of the engines with which this part is compatible:

ISM Series Engines

• ISM CM570: This engine benefits from the precision and reliability of the 4003914 Rocker Lever, ensuring smooth operation and longevity.
• ISM CM570/870: This dual-engine configuration uses the same rocker lever, maintaining consistency in performance and maintenance.
• ISM CM876: The 4003914 Rocker Lever is engineered to fit this engine, providing the necessary support and functionality.

QSM11 Series Engines

• QSM11 CM570: This engine model is compatible with the 4003914 Rocker Lever, ensuring that it meets the specific requirements of this engine variant.
• QSM11 CM876: Similarly, the 4003914 Rocker Lever is designed to fit this engine, offering reliable performance and ease of maintenance.

M11 Series Engines

• M11 CELECT: This engine is compatible with the 4003914 Rocker Lever, ensuring that it meets the stringent demands of this model.
• M11 CELECT PLUS: The PLUS variant also utilizes the 4003914 Rocker Lever, providing the same level of precision and durability.
• M11 MECHANICAL: This mechanical variant of the M11 engine is designed to work seamlessly with the 4003914 Rocker Lever, ensuring optimal performance.

L10 Series Engines

• L10 CELECT: The 4003914 Rocker Lever is compatible with the L10 CELECT engine, ensuring that it fits perfectly and functions as intended.

This comprehensive compatibility ensures that the 4003914 Rocker Lever can be used across a wide range of Cummins engines, providing a reliable and efficient solution for maintenance and repair needs.

Role of Part 4003914 Rocker Lever in Engine Systems

The part 4003914 Rocker Lever is an integral component in the operation of various engine systems, working in conjunction with several other parts to ensure efficient and effective engine performance.

Interaction with the Lever

The Rocker Lever, identified by part number 4003914, operates in tandem with the Lever to amplify the motion transmitted from the camshaft to the valves. This amplification is essential for opening the valves sufficiently to allow the necessary air-fuel mixture into the combustion chamber and to expel exhaust gases. The precise interaction between the Rocker Lever and the Lever ensures that the valve timing is maintained, which is vital for the engine’s overall efficiency and performance.

Integration with the Rocker

In the engine’s valve train system, the Rocker component plays a significant role in converting the rotational motion of the camshaft into the linear motion required to operate the valves. The Rocker Lever, part 4003914, is positioned to receive this motion from the Rocker and further transmit it to the valve stem. This setup reduces the wear on the camshaft and allows for more precise control over valve operation.

Function within the Rocker Top Level Assembly Lever

The Rocker Top Level Assembly Lever is a comprehensive unit that includes multiple components designed to work together to manage valve actuation. Part 4003914 Rocker Lever is a key element within this assembly, providing the necessary leverage to ensure that the valves open and close with the correct force and timing. Its integration within this assembly helps maintain the structural integrity and operational harmony of the valve train, contributing to the engine’s smooth and reliable operation.

Conclusion

Overall, the 4003914 Rocker Lever is designed to enhance the functionality and reliability of the engine’s valve train system by ensuring precise and efficient valve actuation in coordination with other critical components.