3426186
Rocker Lever
Cummins®

The Cummins 3426186 Rocker Lever is a component designed for use in commercial truck engines. It serves a specific function within the engine’s valve train, contributing to the overall performance and efficiency of the truck. Understanding its purpose and significance is key to maintaining and optimizing the operation of commercial vehicles.

Basic Concepts of Rocker Levers

A rocker lever, also known as a rocker arm, is a mechanical component found in internal combustion engines. It acts as a lever that transfers motion from the engine’s camshaft to the valves. This transfer of motion opens and closes the valves at precise intervals, allowing air and fuel into the combustion chamber and expelling exhaust gases. The rocker lever plays a role in amplifying the camshaft’s motion, ensuring that the valves operate correctly within the engine’s cycle ¹.

Purpose of the 3426186 Rocker Lever

This Cummins part is specifically engineered to fit within Cummins engines, where it facilitates the operation of the valve train. It interacts directly with the camshaft and pushrods, transferring motion to the engine’s valves. This component ensures that the valves open and close in sync with the engine’s operation, contributing to efficient combustion and overall engine performance.

Key Features

The 3426186 is constructed from high-quality materials, ensuring durability and reliability under the demanding conditions of commercial truck operation. Its design includes precision-machined surfaces for smooth operation and longevity. Additionally, the rocker lever may feature specific design elements tailored to Cummins engines, enhancing its compatibility and performance within these systems ².

Benefits

The use of the 3426186 in commercial truck engines can lead to improved engine performance. Its robust construction and precise engineering contribute to the durability and reliability of the engine’s valve train. This component plays a role in maintaining consistent valve operation, which is vital for engine efficiency and longevity.

Installation Process

Installing the 3426186 requires careful attention to detail to ensure proper function and compatibility with the engine. The process involves removing the old rocker lever, if applicable, and positioning the new component in its place. Tools such as wrenches and torque specifications provided by the manufacturer should be used to secure the rocker lever in place, ensuring it is correctly aligned and tightened to the manufacturer’s specifications ³.

Common Issues and Troubleshooting

Common issues with the 3426186 may include wear and tear, leading to decreased performance or valve train noise. Troubleshooting these issues involves inspecting the rocker lever for signs of damage or excessive wear. Solutions may range from adjusting the valve clearance to replacing the rocker lever if it is found to be faulty.

Maintenance Tips

Regular maintenance of the 3426186 is key to ensuring its longevity and optimal performance. This includes periodic inspections for wear and damage, as well as ensuring that all connections are secure and properly torqued. Following the manufacturer’s maintenance schedule and guidelines can help prevent issues and extend the life of the component.

Cummins Corporation

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 serves commercial truck, bus, construction, agricultural, and industrial markets. The company is renowned for its commitment to reliability, performance, and customer satisfaction in the commercial truck industry.

Cummins Rocker Lever 3426186 Compatibility

The Cummins Rocker Lever part number 3426186 is designed to fit seamlessly with a range of engines, ensuring reliable operation and performance. This part is compatible with the following engines:

Cummins QSV Series

• QSV81G: The Rocker Lever 3426186 is engineered to integrate smoothly with the QSV81G engine, providing support for the valve train system.
• QSV91G: Similarly, this part fits the QSV91G engine, ensuring that the valve train operates efficiently and reliably.

Cummins QSW/QSV Series

• QSW/QSV82: The Rocker Lever 3426186 is compatible with the QSW/QSV82 engine, facilitating smooth valve operation and contributing to the overall performance of the engine.

Cummins QSW Series

• QSW27: This part is designed to fit the QSW27 engine, ensuring that the rocker arm functions correctly and supports the engine’s valve train.
• QSW36: The Rocker Lever 3426186 is also compatible with the QSW36 engine, providing the necessary support for the valve train system.
• QSW73: Lastly, the QSW73 engine is also supported by the Rocker Lever 3426186, ensuring that the valve train operates as intended.

By ensuring compatibility with these engines, the Rocker Lever 3426186 from Cummins helps maintain the integrity and efficiency of the valve train system, contributing to the overall performance and longevity of the engines.

Understanding the Integration of Part 3426186 Rocker Lever in Engine Systems

The part 3426186 Rocker Lever is a component in the operation of various engine systems, facilitating the transfer of motion from the camshaft to the valves. Its role is pivotal in ensuring that the valves open and close at the precise moments necessary for optimal engine performance.

Interaction with the Lever and Rocker Components

The Rocker Lever, identified as part 3426186, works in conjunction with the Lever and Rocker components to amplify the motion generated by the camshaft. This amplification is necessary because the camshaft’s lobe typically has a smaller lift than what is required to open the valve sufficiently. The Rocker Lever achieves this by pivoting on a fulcrum, usually the Rocker Lever Support, to increase the force and distance the valve moves.

Role in the Lever Assembly Rocker and Rocker Assembly Lever

In the Lever Assembly Rocker configuration, the Rocker Lever is part of a more complex system that includes multiple levers and rockers working together to manage the valve operation across different cylinders. This assembly allows for a synchronized operation of the valves, ensuring that each cylinder receives the correct air-fuel mixture at the right time.

Conversely, in a Rocker Assembly Lever setup, the Rocker Lever is integrated into a system where it primarily interacts with other lever components to distribute the camshaft’s motion across various points in the engine. This configuration is particularly useful in engines where space is at a premium, or where the camshaft and valves are not in a direct line.

Support from the Rocker Lever Support

The efficiency and reliability of the Rocker Lever are significantly influenced by the Rocker Lever Support. This support acts as the pivot point for the Rocker Lever, allowing it to move with minimal friction and maximum precision. The design and material of the Rocker Lever Support are tailored to withstand the high stresses and temperatures encountered in engine environments, ensuring durable and consistent performance of the Rocker Lever.

Conclusion

In summary, the part 3426186 Rocker Lever is a fundamental element in the valve train of an engine, interacting with various components to ensure precise and efficient valve operation. Its integration with the Lever, Rocker, Lever Assembly Rocker, Rocker Assembly Lever, and Rocker Lever Support components underscores its importance in maintaining the engine’s performance and longevity.