4900417
Rocker Lever Adjusting Screw
Cummins®

The Rocker Lever Adjustment Screw 4900417, manufactured by Cummins, is a component designed for use in heavy-duty truck engines. Cummins, a well-established name in the automotive industry, is known for producing reliable and high-performance engine parts. This Cummins part plays a role in ensuring the proper functioning of the valve train mechanism within these engines.

Function and Operation

The Rocker Lever Adjustment Screw 4900417 is integral to the valve train mechanism. It facilitates the precise adjustment of the rocker lever, which in turn ensures that the valves open and close at the correct intervals. This screw interacts with the rocker arm, pushrod, and valve stem to maintain the proper clearance and timing necessary for optimal engine performance. By allowing fine-tuned adjustments, it helps in achieving the desired valve lift and duration, which are important for efficient combustion and overall engine efficiency ¹.

Key Features

The Rocker Lever Adjustment Screw 4900417 is characterized by its robust design and high-quality materials. It is crafted from durable alloys that offer resistance to wear and corrosion, ensuring longevity even under the demanding conditions typical of heavy-duty truck engines. The precision engineering of this screw ensures that it fits snugly into place, providing consistent and reliable performance. Its design also allows for easy adjustment, which is important for maintaining the engine’s performance over time.

Benefits

The use of the Rocker Lever Adjustment Screw 4900417 offers several advantages. It contributes to improved engine performance by ensuring that the valves operate within the specified parameters. This precision leads to better fuel efficiency and reduced emissions. Additionally, the screw’s durable construction reduces the frequency of maintenance required, thereby lowering overall maintenance costs. The enhanced reliability of the engine, thanks to the proper functioning of the valve train, also results in increased uptime for the vehicle ².

Installation and Adjustment

Proper installation and adjustment of the Rocker Lever Adjustment Screw 4900417 are vital for its effective functioning. The installation process involves securing the screw in its designated position within the valve train assembly. Adjustments should be made according to the manufacturer’s torque specifications to ensure that the screw is neither overtightened nor undertightened. Recommended practices include using the appropriate tools and following a systematic approach to verify that all components are correctly aligned and functioning as intended.

Troubleshooting Common Issues

Common issues associated with Rocker Lever Adjustment Screws can include improper valve clearance, which may lead to engine misfires or reduced performance. Diagnostic techniques involve checking the valve clearances and observing the engine’s behavior under different operating conditions. Corrective actions may include re-adjusting the screw to the proper specifications or replacing it if wear or damage is detected. Regular inspections can help identify potential problems before they lead to significant engine issues.

Maintenance Tips

To ensure the optimal performance and longevity of the Rocker Lever Adjustment Screw 4900417, regular maintenance is recommended. This includes periodic inspection of the screw and surrounding components for signs of wear or damage. Lubrication, as per the manufacturer’s guidelines, can help reduce friction and wear. Additionally, following the recommended replacement schedule can prevent unexpected failures and maintain engine efficiency.

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 built a reputation for innovation, quality, and reliability. The company’s product portfolio includes a wide range of engines and components for on-highway, off-highway, and stationary applications. Cummins’ commitment to excellence is evident in their rigorous quality assurance processes and continuous investment in research and development.

Rocker Lever Adjustment Screw (Part 4900417) Compatibility with Cummins Engines

The Rocker Lever Adjustment Screw, part number 4900417, is a component in the operation of several Cummins engines. This part is important for maintaining the precise clearance between the rocker arm and the valve, ensuring optimal engine performance and longevity.

A1400 and A1700 Engines

The A1400 and A1700 engines are part of Cummins’ smaller engine series, often used in compact machinery and light-duty applications. The Rocker Lever Adjustment Screw in these engines is designed to provide fine-tuning capabilities, allowing for adjustments to be made to the valve clearances. This ensures that the engine operates smoothly and efficiently, reducing the risk of valve damage due to improper clearance.

A2000 and A2300 Engines

Moving to the larger A2000 and A2300 engines, the Rocker Lever Adjustment Screw plays a similarly vital role. These engines are typically used in medium-duty applications, such as agricultural and construction equipment. The precision of the adjustment screw is important in these engines, as any deviation in valve clearance can lead to significant performance issues or even engine failure.

Grouping by Application

When grouping these engines by application, the A1400 and A1700 engines are often found in smaller, more compact machinery, where space and weight are critical considerations. The Rocker Lever Adjustment Screw in these engines is designed to be lightweight and compact, fitting seamlessly into the engine’s design without adding unnecessary bulk.

On the other hand, the A2000 and A2300 engines are used in more robust applications, where durability and reliability are paramount. The Rocker Lever Adjustment Screw in these engines is built to withstand higher stresses and more frequent adjustments, ensuring that the engine can maintain optimal performance over a longer period.

Importance of Proper Adjustment

Proper adjustment of the Rocker Lever Adjustment Screw is important for all these engines. Incorrect adjustments can lead to a range of issues, including poor engine performance, increased wear and tear, and potential engine damage. Regular maintenance and precise adjustments are key to ensuring that these engines operate at their best.

Role of Part 4900417 Rocker Lever Adjustment Screw in Engine Systems

The Part 4900417 Rocker Lever Adjustment Screw is a component in the precise operation of engine systems, particularly in ensuring the optimal performance of the valve train. This screw is integral to the adjustment mechanism of the rocker lever, which is a pivotal element in the valve actuation process.

In the valve train system, the rocker lever is responsible for transferring motion from the camshaft to the valves. This transfer is achieved through a pivoting action that amplifies the camshaft’s motion, ensuring that the valves open and close at the correct times and with the appropriate force. The Rocker Lever Adjustment Screw plays a role in fine-tuning this mechanism.

By adjusting the screw, mechanics can modify the clearance between the rocker lever and the valve stem. This adjustment is vital for maintaining the correct valve lash, which is the small gap that exists between the rocker lever and the valve stem when the valve is fully closed. Proper valve lash is necessary to ensure that the valve opens and closes efficiently, without causing undue wear on the components or affecting engine performance.

The screw’s adjustment capability also aids in compensating for thermal expansion and wear over time. As engine components heat up during operation, they expand, which can alter the clearances within the valve train. The Rocker Lever Adjustment Screw allows for minor adjustments to be made, ensuring that the valve train maintains its efficiency and reliability under varying operating conditions.

Furthermore, this component is often used in conjunction with other elements such as shims and lock nuts to secure the adjustment and prevent any movement that could lead to inconsistent valve operation. The interplay between these components underscores the importance of the Rocker Lever Adjustment Screw in maintaining the intricate balance required for smooth engine operation.

Conclusion

In summary, the Part 4900417 Rocker Lever Adjustment Screw is a fundamental part of the valve train system, enabling precise adjustments that are essential for the efficient and reliable operation of engine components.