4995604
Rocker Lever
Cummins®

The Cummins 4995604 Rocker Lever is a vital component in the operation of commercial trucks, particularly within the engine system. It facilitates the transfer of motion from the camshaft to the valves, ensuring precise timing and efficient engine performance.

Basic Concepts of Rocker Levers

A rocker lever is a mechanical device that amplifies force and motion. In an engine, it operates on the principle of leverage, providing a mechanical advantage that allows for the efficient transfer of motion from the camshaft to the valves. This mechanism ensures that the valves open and close at the correct times, which is essential for the engine’s combustion process. Rocker levers are employed in various engine configurations to optimize performance and efficiency ¹.

Purpose of the 4995604 Rocker Lever

The 4995604 Rocker Lever plays a specific role in the operation of a truck engine by facilitating the transfer of motion from the camshaft to the valves. This interaction ensures that the valves open and close with precision, which is vital for maintaining engine performance and efficiency. By enhancing the mechanical advantage, the rocker lever contributes to the overall effectiveness of the engine’s valve train.

Key Features

The 4995604 Rocker Lever is characterized by several key features, including its material composition, which typically consists of high-strength alloys to withstand the rigors of engine operation. Its design incorporates elements that ensure durability and reliability, such as precision machining and robust construction. Unique characteristics may include specific ratios of mechanical advantage tailored to the engine’s requirements, distinguishing it from other rocker levers.

Benefits

Utilizing the 4995604 Rocker Lever offers several benefits, such as improved engine performance through precise valve actuation. Its durability ensures long-term reliability, reducing the need for frequent replacements. These attributes contribute to the overall efficiency and longevity of the truck, enhancing operational effectiveness and reducing maintenance costs.

Installation and Integration

When installing the 4995604 Rocker Lever, it is important to follow guidelines to ensure proper integration into the truck engine. Compatibility with various engine models should be considered, and the installation process should be conducted with attention to detail to maintain the component’s integrity and functionality. Proper installation is vital for the rocker lever to perform its role effectively within the engine system.

Troubleshooting and Maintenance

To maintain optimal performance of the 4995604 Rocker Lever, regular maintenance practices should be observed. This includes inspecting for signs of wear, ensuring proper lubrication, and addressing any issues promptly. Troubleshooting common problems, such as noise or inconsistent valve operation, can often be resolved through careful examination and corrective action, ensuring the component continues to function efficiently.

Performance Enhancements

The 4995604 Rocker Lever contributes to performance enhancements in commercial trucks by ensuring precise valve timing and efficient operation of the valve train. This leads to improved engine efficiency, increased power output, and a smoother driving experience. The component’s design and functionality are tailored to maximize these benefits, enhancing the truck’s overall performance.

Durability and Reliability

The durability and reliability of the 4995604 Rocker Lever are attributed to its high-strength material composition and robust design. These factors contribute to its longevity and resistance to wear and tear, even in demanding truck applications. The component’s ability to withstand the stresses of engine operation ensures consistent performance over time.

Cummins Overview

Cummins Inc. is a renowned manufacturer in the commercial truck industry, known for its commitment to innovation, quality, and customer satisfaction. With a rich history of producing reliable and high-performance engine components, Cummins has established a reputation for excellence. The company’s dedication to advancing technology and meeting the needs of its customers underscores its position as a leader in the industry.

Rocker Lever 4995604 Compatibility with Cummins Engines

The Rocker Lever part number 4995604, manufactured by Cummins, is designed to fit a variety of Cummins engines. This part is integral to the engine’s valve train system, ensuring proper valve operation and overall engine performance. Below is a detailed breakdown of the engines with which this rocker lever is compatible:

Cummins B Series Engines

• 6B5.9
• B5.6 CM2670 B152B
• B6.7 CM2350 B135B
• B6.7 CM2670 B153B
• B6.7 CM2670 B164C
• B6.7 G CMOH6.0 B125

Cummins ISB Series Engines

• ISB (Chrysler)
• ISB CM2150
• ISB CM550
• ISB CM850
• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN
• ISB5.9 CM2880 B110
• ISB5.9 CM2880 B140
• ISB5.9 CM2880 B149
• ISB6.7 CM2250
• ISB6.7 CM2350 B101
• ISB6.7 G CM2180 B118

Cummins ISBE Series Engines

• ISBE CM2150
• ISBE CM800
• ISBE4 CM850

Cummins QSB Series Engines

• QSB4.5 CM2250 EC
• QSB4.5 CM850 (CM2850)
• QSB5.9 44 CM550

This rocker lever is engineered to meet the specific requirements of each engine model, ensuring compatibility and optimal performance. The design and material of the rocker lever are tailored to handle the unique stresses and operational conditions of each engine series.

Role of Part 4995604 Rocker Lever in Engine Systems

The 4995604 Rocker Lever is an integral component within the engine’s valve train system, facilitating the transfer of motion from the camshaft to the valves. Its primary function is to amplify the camshaft’s motion, ensuring that the valves open and close with the precision timing required for optimal engine performance.

When integrated into an Assembly, the 4995604 Rocker Lever works in concert with other components to maintain the engine’s operational integrity. It is often part of a Rocker Lever Assembly, which includes the rocker lever itself, the rocker lever support, and sometimes additional components like shims or adjusters. This assembly is responsible for converting the rotational motion of the camshaft into the linear motion needed to operate the valves.

In the context of a Long Block, which encompasses the engine block, crankshaft, pistons, and camshaft, the 4995604 Rocker Lever ensures that the valve train operates smoothly. The long block is a foundational component in engine construction, and the proper function of the rocker lever within this system is essential for the engine’s overall efficiency and performance.

For a Long Block Kit, which typically includes all the components of a long block plus additional parts like gaskets, seals, and sometimes a rocker lever assembly, the 4995604 Rocker Lever plays a significant role. It is often pre-installed or included as part of the kit to simplify the engine rebuilding process. The rocker lever’s precise engineering ensures that it fits seamlessly within the kit, contributing to a hassle-free installation and reliable engine function.

The Rocker Lever Support is another component that interacts directly with the 4995604 Rocker Lever. This support structure provides a stable mounting point for the rocker lever, ensuring it remains in the correct position relative to the camshaft and valves. The interaction between the rocker lever and its support is vital for maintaining the correct valve clearance and timing.

Conclusion

In summary, the 4995604 Rocker Lever is a key element in the valve train system, ensuring that the camshaft’s motion is effectively transmitted to the valves. Its integration within assemblies, long blocks, and long block kits underscores its importance in maintaining engine performance and reliability.