3406906
Rocker Lever Cover Spacer
Cummins®

The Rocker Lever Cover Spacer, identified by Part #3406906, is a component manufactured by Cummins, a renowned leader in diesel engine technology. This spacer is integral to the operation of heavy-duty truck engines, ensuring the proper function and longevity of the engine’s valve train system. Cummins is well-regarded for its commitment to quality and innovation, making this spacer a reliable component in their extensive lineup of engine parts ¹.

Function and Operation

The Rocker Lever Cover Spacer operates within the engine assembly by providing the necessary clearance and alignment between the rocker arms and the valve covers. It ensures that the rocker arms, which actuate the valves, maintain the correct distance from the valve covers. This spacing is vital for the efficient operation of the valve train, allowing for smooth and precise valve movement without interference from the cover. The spacer interacts directly with the rocker arms and valve covers, playing a role in maintaining the integrity of the engine’s valve operation ².

Purpose of the Rocker Lever Cover Spacer

The primary role of the Rocker Lever Cover Spacer is to maintain proper clearances and alignment within the engine’s valve train system. By ensuring that the rocker arms are correctly positioned relative to the valve covers, the spacer helps prevent undue stress on the components, reduces the risk of wear, and contributes to the overall efficiency and reliability of the engine. This precise alignment is crucial for the consistent and smooth operation of the valves, which are fundamental to the engine’s performance ³.

Key Features

The Rocker Lever Cover Spacer is designed with several key features that enhance its performance and durability. It is typically made from high-quality materials that can withstand the harsh conditions within an engine environment. The spacer is engineered to exact specifications to ensure a perfect fit and function within the engine assembly. Additionally, it may include unique attributes such as corrosion-resistant coatings or specialized designs that improve its effectiveness and longevity in demanding applications.

Benefits

The advantages provided by the Rocker Lever Cover Spacer include improved engine efficiency, reduced wear on components, and enhanced overall reliability. By maintaining the correct clearances and alignment, the spacer contributes to the smooth operation of the valve train, which can lead to better engine performance and fuel efficiency. Additionally, the spacer helps protect the rocker arms and valve covers from premature wear, extending the lifespan of these critical components and reducing the need for frequent maintenance or replacement.

Installation and Maintenance

Proper installation of the Rocker Lever Cover Spacer is crucial for its effective function. It should be installed according to the manufacturer’s guidelines to ensure it is correctly positioned and secured within the engine assembly. Regular maintenance practices, such as inspecting the spacer for signs of wear or damage and ensuring it remains properly aligned, can help ensure its longevity and continued performance. Common issues that may arise include leaks, misalignment, or damage to the spacer, which can often be addressed through careful inspection and timely replacement if necessary.

Troubleshooting

Identifying and addressing potential problems related to the Rocker Lever Cover Spacer is important for maintaining engine performance. Issues such as leaks, misalignment, or damage can often be detected through routine inspections. If a problem is identified, it may be necessary to adjust the spacer’s position, replace damaged components, or address any underlying issues that could be affecting its function. Following the manufacturer’s recommendations for troubleshooting and maintenance can help ensure the spacer continues to operate effectively.

Manufacturer - Cummins

Cummins is a leading manufacturer of diesel engines and related components, known for its reputation for quality and innovation in the automotive industry. With a long history of producing reliable and high-performance engine parts, Cummins has established itself as a trusted name in the field. Their commitment to excellence is evident in the design and manufacturing of components like the Rocker Lever Cover Spacer, ensuring that they meet the demanding requirements of heavy-duty truck engines.

Compatibility of Rocker Lever Cover Spacer Part 3406906 with Cummins Engines

The Rocker Lever Cover Spacer part number 3406906 is designed to fit several Cummins engine models. This component plays a crucial role in maintaining the structural integrity of the engine by providing a necessary space between the rocker lever cover and other engine parts. Here are the specific engine models with which this part is compatible:

ISM CM570 Series

• ISM CM570: This engine model is designed for heavy-duty applications and benefits from the precise fit of the Rocker Lever Cover Spacer to ensure optimal engine performance and longevity.

ISM CM570/870 Series

• ISM CM570/870: This dual-model engine series combines the features of both the ISM CM570 and ISM CM876 engines. The Rocker Lever Cover Spacer is engineered to fit seamlessly within this hybrid configuration, ensuring compatibility and proper engine function.

ISM CM876 Series

• ISM CM876: Known for its robust performance, the ISM CM876 engine requires the Rocker Lever Cover Spacer to maintain the correct spacing between the rocker lever cover and other critical engine components.

ISM11 CM876 SN Series

• ISM11 CM876 SN: This engine model is part of the ISM11 series, which is designed for high-performance applications. The Rocker Lever Cover Spacer is essential for ensuring that the engine operates within its designed parameters.

QSM11 CM570 Series

• QSM11 CM570: This engine model is engineered for demanding conditions and relies on the Rocker Lever Cover Spacer to maintain the correct alignment and spacing of engine components, ensuring reliable operation.

Each of these engines, despite their differences, shares a common requirement for the Rocker Lever Cover Spacer to function correctly. This part is critical in maintaining the engine’s structural integrity and ensuring that all components operate as intended.

Role of Part 3406906 Rocker Lever Cover Spacer in Engine Systems

The part 3406906 Rocker Lever Cover Spacer is an essential component in the assembly and functionality of various engine systems, particularly those involving the brake and engine brake mechanisms.

In the Engine Brake 411 D 12 / 24 V Kit, the Rocker Lever Cover Spacer ensures proper alignment and spacing between the rocker lever and the cover. This alignment is vital for the efficient operation of the engine brake system, allowing for precise control over the braking force applied to the engine. The spacer helps maintain the structural integrity of the assembly, preventing undue stress on the components and ensuring smooth operation.

Similarly, in the Engine Brake 411 E Kit, the Rocker Lever Cover Spacer plays a significant role in the accurate positioning of the rocker lever. This precise positioning is necessary for the effective engagement and disengagement of the engine brake, contributing to the overall performance and reliability of the braking system.

In a general Engine Brake Kit, the Rocker Lever Cover Spacer is instrumental in maintaining the correct clearances and tolerances within the engine brake mechanism. This ensures that the brake system operates within specified parameters, enhancing the durability and efficiency of the engine brake.

Overall, the Rocker Lever Cover Spacer is a key component in ensuring the proper function and reliability of engine brake systems, contributing to the overall performance and longevity of the engine.

Conclusion

The Rocker Lever Cover Spacer, part number 3406906, is a critical component in the maintenance and operation of Cummins engines. Its role in ensuring proper clearances and alignment within the valve train system contributes to the engine’s efficiency, reliability, and longevity. Proper installation, maintenance, and troubleshooting are essential to maximize the benefits of this Cummins part. Its compatibility with various Cummins engine models underscores its importance in the automotive industry.