4995628
Rocker Lever Assembly
Cummins®

The 4995628 Rocker Lever Assembly is a component manufactured by Cummins, designed for use in heavy-duty truck engines. This assembly plays a significant role in the operation of these engines, ensuring efficient and reliable performance. Cummins, a well-established name in the automotive industry, is known for producing high-quality engine components.

Basic Concepts of Rocker Lever Assembly

Rocker lever assemblies are integral to the mechanical function of an engine. They operate on the principle of transferring motion from the camshaft to the valves. When the camshaft rotates, it pushes against the rocker lever, which then amplifies this motion to open and close the engine valves at precise intervals. This mechanism is vital for the intake and exhaust processes within the engine, directly influencing its overall performance ⁴.

Purpose of the 4995628 Rocker Lever Assembly

The 4995628 Rocker Lever Assembly is specifically designed to ensure proper valve timing and efficient engine performance in heavy-duty trucks. By accurately transferring motion from the camshaft to the valves, it plays a role in maintaining the engine’s operational efficiency. This assembly helps in achieving the correct valve lift and duration, which are critical for the engine’s combustion process ¹.

Key Features

The 4995628 Rocker Lever Assembly is characterized by several key features that enhance its performance and durability. It is constructed from high-quality materials, ensuring resistance to wear and corrosion. The design incorporates precise engineering to provide smooth operation and reliable valve actuation. Additionally, it may feature unique characteristics such as hardened contact surfaces or specialized coatings to further improve its longevity and efficiency ².

Benefits

The use of the 4995628 Rocker Lever Assembly offers several benefits. It contributes to improved engine efficiency by ensuring accurate valve timing and operation. This results in better fuel economy and reduced emissions. The assembly’s durable construction and reliable performance also lead to increased engine longevity, reducing the need for frequent replacements and lowering operational costs. Furthermore, its precise engineering helps in maintaining consistent engine performance under various operating conditions ³.

Installation Process

Installing the 4995628 Rocker Lever Assembly requires careful attention to detail. The process involves removing the old assembly, cleaning the mounting area, and then positioning the new assembly in place. It is important to use the correct tools and follow manufacturer guidelines to ensure proper installation. This may include torquing fasteners to specified values and verifying the alignment of the rocker lever with the camshaft and valves. Proper installation is key to ensuring the assembly functions correctly and contributes to the engine’s overall performance ⁴.

Troubleshooting Common Issues

Common issues with the 4995628 Rocker Lever Assembly may include noise, wear, or malfunction. Noise can often be attributed to improper installation or wear on the assembly’s components. Regular inspection and maintenance can help identify and address these issues early. Wear may require replacement of the assembly or its components, while malfunctions could be due to manufacturing defects or improper use. Troubleshooting these issues involves a systematic approach to diagnosis, often starting with visual inspection and moving to more detailed analysis if necessary ¹.

Maintenance Tips

To keep the 4995628 Rocker Lever Assembly in optimal condition, routine maintenance is recommended. This includes regular lubrication of moving parts to reduce friction and wear. Inspection intervals should be adhered to, allowing for early detection of any signs of wear or damage. Replacement guidelines should be followed to ensure that worn components are replaced before they fail, maintaining the assembly’s performance and longevity. Proper maintenance not only extends the lifespan of the assembly but also contributes to the overall efficiency and reliability of the engine ².

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a reputation for innovation, quality, and reliability in the automotive industry. The company is committed to manufacturing high-quality engine components, including the 4995628 Rocker Lever Assembly, ensuring that their products meet the demanding requirements of heavy-duty applications ³.

Compatibility of Rocker Lever Assembly Part 4995628 with Cummins Engines

The Rocker Lever Assembly part 4995628, 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 description of the engines with which this rocker lever assembly is compatible.

ISC Series Engines

• ISC CM2150
• ISC8.3 CM2250

The ISC series engines, including the ISC CM2150 and ISC8.3 CM2250, are part of Cummins’ lineup of industrial and on-highway engines. The Rocker Lever Assembly part 4995628 is specifically engineered to fit these models, ensuring smooth and reliable valve operation.

ISL Series Engines

• ISL CM2150
• ISL9 CM2150 SN
• ISL9 CM2250

The ISL series engines, such as the ISL CM2150, ISL9 CM2150 SN, and ISL9 CM2250, are known for their durability and performance in both on-highway and vocational applications. The Rocker Lever Assembly part 4995628 is compatible with these engines, providing the necessary components for efficient valve actuation.

ISL9 Series Engines

• ISL9.5 CM2880 L138

The ISL9.5 CM2880 L138 engine is a high-performance model within the ISL9 series. The Rocker Lever Assembly part 4995628 is designed to fit this engine, ensuring that the valve train operates smoothly under high-stress conditions.

QSC and QSL Series Engines

• QSC9 CM2250/QSL9 CM2250
• QSL8.9 CM2150 L141
• QSL9 CM2250
• QSL9 CM2350 L102
• QSL9 CM850 (CM2850)

The QSC and QSL series engines, including the QSC9 CM2250/QSL9 CM2250, QSL8.9 CM2150 L141, QSL9 CM2250, QSL9 CM2350 L102, and QSL9 CM850 (CM2850), are designed for a variety of applications, from construction to power generation. The Rocker Lever Assembly part 4995628 is compatible with these engines, ensuring that the valve train functions optimally across different operational environments.

This compatibility ensures that the Rocker Lever Assembly part 4995628 can be used across a wide range of Cummins engines, providing a reliable and efficient solution for maintaining and repairing these engines.

Role of Part 4995628 Rocker Lever Assembly in Engine Systems

The 4995628 Rocker Lever Assembly is an integral component in the operation of various engine systems, facilitating the conversion of the rotational motion of the camshaft into the linear motion required to operate the valves. This assembly typically consists of a rocker arm and a lever mechanism that amplifies the camshaft’s motion.

In the valve train system, the rocker lever assembly interacts directly with the camshaft and the valve. As the camshaft rotates, it pushes against the rocker arm, which then pivots on its fulcrum. This pivoting action transfers motion to the valve via the lever, opening it to allow air and fuel into the combustion chamber or expelling exhaust gases.

The assembly also plays a significant role in the hydraulic lifter system. Here, the rocker lever assembly works in conjunction with hydraulic lifters to maintain consistent valve clearance. As the engine components wear over time, the clearance between the camshaft and the valve can change. The hydraulic lifter, connected to the rocker lever assembly, adjusts automatically to maintain optimal valve operation, ensuring efficient engine performance.

In overhead valve (OHV) engines, the rocker lever assembly is positioned between the camshaft and the valves. It provides the necessary mechanical advantage to open the valves against the spring pressure. The design of the rocker lever assembly allows for precise control over the valve’s opening and closing timing, which is essential for engine efficiency and performance.

For overhead cam (OHC) engines, the rocker lever assembly may be simpler, often consisting of a direct-acting rocker arm. In these systems, the camshaft is located directly above the valves, reducing the distance the motion needs to travel. The rocker lever assembly still plays a vital role in amplifying the camshaft’s motion to ensure the valves open sufficiently.

Overall, the 4995628 Rocker Lever Assembly is a key component in ensuring the smooth and efficient operation of the valve train in various engine systems. Its design and function are tailored to enhance the engine’s performance by precisely controlling valve timing and lift ⁴.

Conclusion

The 4995628 Rocker Lever Assembly is a critical component in the operation of heavy-duty truck engines, ensuring efficient and reliable performance. Its role in transferring motion from the camshaft to the valves is essential for the engine’s intake and exhaust processes. The assembly’s design, featuring high-quality materials and precise engineering, contributes to its durability and efficiency. Regular maintenance and proper installation are key to maximizing its performance and longevity. Compatibility with a wide range of Cummins engines further underscores its importance in the automotive industry.

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