3695389
Rocker Lever
Cummins®

The Cummins 3695389 Rocker Lever is a critical component in heavy-duty truck engines, specifically within the valve train mechanism. It facilitates the operation of the engine’s valves, ensuring they open and close at the correct times to allow for the intake and exhaust of gases. This part is integral to the efficient functioning of Cummins engines, contributing to their performance and reliability.

Basic Concepts of Rocker Levers

Rocker levers are mechanical components found in an engine’s valve train. They act as a linkage between the camshaft and the valves, amplifying the motion of the camshaft to operate the valves. The primary function of a rocker lever is to transfer the motion from the camshaft to the valve, ensuring that the valve opens and closes in sync with the engine’s operation. This mechanism is vital for maintaining the engine’s efficiency and performance, as it directly affects the timing and duration of the valve’s opening and closing ¹.

Purpose of the 3695389 Rocker Lever

The 3695389 Rocker Lever plays a specific role in the operation of Cummins engines. It interacts with the camshaft and valves to ensure precise valve actuation. The rocker lever receives motion from the camshaft and transfers it to the valve, allowing for the controlled intake and exhaust of gases. This interaction is crucial for the engine’s combustion process, affecting its efficiency and power output ².

Key Features

The design and material characteristics of the 3695389 Rocker Lever are tailored to enhance its performance and durability. Constructed from high-strength materials, it is designed to withstand the high stresses and temperatures within the engine environment. Its precise engineering ensures optimal interaction with other valve train components, contributing to the engine’s overall reliability and efficiency ³.

Benefits

The 3695389 Rocker Lever offers several advantages, including improved engine efficiency, reliability, and longevity. Its design allows for more precise valve actuation, which can lead to better engine performance. Additionally, the durability of the rocker lever contributes to the engine’s longevity, reducing the need for frequent replacements and maintenance.

Installation and Compatibility

Proper installation of the 3695389 Rocker Lever is crucial for ensuring optimal performance. It should be installed according to the manufacturer’s guidelines, with attention to torque specifications and alignment with other valve train components. Ensuring the rocker lever is correctly installed will help maintain the engine’s efficiency and reliability.

Troubleshooting and Maintenance

Common issues associated with rocker levers include wear, improper installation, and compatibility issues with other valve train components. Regular inspection and maintenance can help identify and address these issues before they lead to engine performance problems. Maintenance tips include checking for proper installation, ensuring there is no excessive wear, and verifying compatibility with other components.

Performance Enhancements

There are potential modifications or upgrades that can be made to the 3695389 Rocker Lever to enhance engine performance. These may include aftermarket options that offer improved durability or performance characteristics. Careful consideration should be given to any modifications to ensure they are compatible with the engine and do not adversely affect its operation.

Cummins Corporation

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a strong reputation within the automotive and heavy-duty truck industries, Cummins is known for its high-quality products and innovative solutions. The company’s commitment to excellence is reflected in its wide range of products, including the 3695389 Rocker Lever, which is designed to meet the demanding requirements of heavy-duty applications.

Compatibility of Rocker Lever Part 3695389 with Cummins Engines

The Rocker Lever part number 3695389, manufactured by Cummins, is designed to fit a range of Cummins engines. This part is integral to the engine’s valve train system, ensuring proper valve operation and engine performance. Below is a detailed breakdown of the engines with which this rocker lever is compatible:

ISG11 CM2880 G108 and ISG12 CM2880 G107

The ISG11 CM2880 G108 and ISG12 CM2880 G107 engines are part of Cummins’ range of industrial stationary gas engines. The rocker lever part 3695389 is specifically engineered to fit these models, ensuring reliable valve actuation and maintaining the engine’s operational integrity.

ISG12 G CMOH6.0 G111

This engine, the ISG12 G CMOH6.0 G111, is another variant in Cummins’ industrial gas engine lineup. The rocker lever part 3695389 is compatible with this engine, providing the necessary mechanical advantage for valve operation.

QSG12 CM2880 G112

The QSG12 CM2880 G112 engine is a part of Cummins’ quiet series gas engines, designed for applications requiring lower noise levels. The rocker lever part 3695389 is suitable for this engine, ensuring smooth and efficient valve operation.

QSG12/X12 CM2350 G110

The QSG12/X12 CM2350 G110 engine combines features from both the quiet series and the X12 series. The rocker lever part 3695389 is compatible with this hybrid model, facilitating proper valve actuation and contributing to the engine’s overall performance.

X12 CM2350 X119B and X12 CM2670 X121B

The X12 series engines, specifically the X12 CM2350 X119B and X12 CM2670 X121B, are designed for high-performance applications. The rocker lever part 3695389 is engineered to fit these engines, ensuring robust and reliable valve operation under demanding conditions.

By understanding the compatibility of the rocker lever part 3695389 with these Cummins engines, technicians and operators can ensure proper maintenance and performance of their engines.

Role of Part 3695389 Rocker Lever in Engine Systems

The part 3695389 Rocker Lever is an essential component in the operation of the engine’s valve train system. It works in conjunction with the cylinder head to ensure efficient and precise valve operation.

Interaction with the Cylinder Head

The cylinder head houses the valves—intake and exhaust—which are vital for the engine’s breathing process. The Rocker Lever is mounted on the cylinder head and is directly connected to the valve stem via a pushrod or directly through a hydraulic lifter in overhead cam (OHC) systems.

Functionality in the Valve Train

1. Valve Actuation: The Rocker Lever amplifies the motion from the camshaft. As the camshaft lobe rises, it pushes against the Rocker Lever, which then translates this motion to open the valve. This mechanism ensures that the valves open and close at the correct times in the engine’s cycle.

2. Mechanical Advantage: The Rocker Lever provides a mechanical advantage, allowing for a smaller camshaft lift to result in a larger valve lift. This is particularly important in high-performance engines where precise valve timing and lift are necessary for optimal performance.

3. Load Distribution: By using a Rocker Lever, the load on the camshaft and valve train components is more evenly distributed. This reduces wear and tear on these parts, contributing to the longevity of the engine.

4. Adjustment Capability: Many Rocker Levers are adjustable, allowing for fine-tuning of valve clearance. This is essential for maintaining proper valve operation over the engine’s lifespan, especially in engines with mechanical valve clearance adjustments.

Conclusion

In summary, the part 3695389 Rocker Lever plays a significant role in the efficient and reliable operation of the engine’s valve train, working hand-in-hand with the cylinder head to ensure that the valves open and close with the precision required for optimal engine performance.