4386047
Rocker Lever
Cummins®

The Cummins 4386047 Rocker Lever is a component designed for use in commercial truck engines. It serves a specific function within the engine’s valve train mechanism, contributing to the overall operation and performance of the engine. Understanding its purpose and significance is key to maintaining and optimizing the efficiency of commercial trucks.

Basic Concepts of Rocker Levers

A rocker lever, also known as a rocker arm, is a pivotal component in an engine’s valve train. It operates by transferring motion from the camshaft to the valves, allowing them to open and close at precise intervals. This mechanism is essential for the intake and exhaust processes, which are fundamental to the engine’s combustion cycle. The rocker lever amplifies the camshaft’s motion, ensuring that the valves open sufficiently for optimal engine performance ¹.

Purpose of the 4386047 Rocker Lever

The 4386047 Rocker Lever is specifically engineered to interact with other components within the engine, such as pushrods and valves. Its role is to convert the rotational motion of the camshaft into linear motion that operates the valves. This conversion is vital for the timing and efficiency of the engine’s combustion process. The lever’s design allows for precise control over valve operation, contributing to the engine’s overall performance and reliability ².

Key Features

The 4386047 Rocker Lever 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 includes specific elements that optimize its function within the engine, such as a smooth pivot point for reduced friction and a robust structure to withstand the stresses of heavy-duty operation. These features contribute to the lever’s reliability and longevity in demanding commercial truck applications ³.

Benefits

The use of the 4386047 Rocker Lever in truck engines offers several benefits. It contributes to improved engine efficiency by ensuring precise valve operation. The lever’s durable construction and design elements enhance its reliability under heavy-duty conditions, reducing the likelihood of failure and the need for frequent replacements. Additionally, its efficient operation supports overall engine performance, contributing to the truck’s operational effectiveness ⁴.

Installation Process

Installing the 4386047 Rocker Lever requires careful attention to detail to ensure proper fitting and function. The process involves securing the lever in place with the appropriate tools, ensuring that it is correctly aligned with the camshaft and valves. It is important to follow manufacturer guidelines to avoid common installation errors that could affect engine performance. Proper installation is key to maximizing the lever’s benefits and ensuring the engine operates efficiently.

Troubleshooting Common Issues

Common issues associated with rocker levers include noise, wear, and failure. These problems can often be traced back to improper installation, lack of maintenance, or the use of incompatible components. Troubleshooting steps may involve inspecting the lever and related components for signs of wear or damage, ensuring proper lubrication, and verifying correct installation. Addressing these issues promptly can help maintain engine performance and prevent more serious problems.

Maintenance Tips

Regular maintenance is essential for ensuring the longevity and optimal performance of the 4386047 Rocker Lever. This includes periodic inspections for signs of wear or damage, ensuring proper lubrication, and following manufacturer-recommended maintenance schedules. Adhering to these practices can help prevent common issues and ensure the lever continues to function effectively within the engine.

Compatibility of Rocker Lever Part 4386047 with Cummins Engines

The Rocker Lever part number 4386047, manufactured by Cummins, is designed to fit a variety of their engine models. This part is integral to the engine’s valve train system, ensuring proper valve operation and overall engine performance. Below is a detailed overview of the engines with which this rocker lever is compatible.

ISX Series Engines

• ISX CM570
• ISX CM870
• ISX CM871

ISX15 Series Engines

• ISX15 CM2250
• ISX15 CM2250 SN
• ISX15 CM2350 X101

QSX15 Series Engines

• QSX15 CM2250
• QSX15 CM2250 ECF
• QSX15 CM2350 X105

X15 Series Engines

• X15 CM2350 X116B
• X15 CM2350 X123B
• X15 CM2450 X134B

Each of these engines relies on the Rocker Lever part 4386047 to maintain the integrity of the valve train system, ensuring that the engine operates efficiently and reliably. This compatibility highlights the versatility and robustness of the part, making it a critical component for these Cummins engine models.

Role of Part 4386047 Rocker Lever in Engine Systems

The part 4386047 rocker lever is a fundamental component in the operation of various engine systems, particularly in the valve train mechanism. This component works in conjunction with several other parts to ensure the efficient and precise operation of the engine.

Interaction with the Rocker Lever Assembly

The rocker lever, identified as part 4386047, is a key element within the rocker lever assembly. This assembly typically includes the rocker lever itself, along with pushrods, valve springs, and other supporting components. The rocker lever’s primary function is to transmit motion from the camshaft to the valves. As the camshaft lobes rise and fall, they push against the rocker lever, which then amplifies this motion to open and close the valves at the correct times.

Integration with the Rocker Lever Top Level Assembly

In more complex engine systems, the rocker lever is part of a rocker lever top level assembly. This assembly may include additional components such as roller tip rockers, hydraulic lifters, and lock nuts. The rocker lever in this setup plays a similar role but often with enhanced precision and reduced friction, thanks to the roller tips that interface with the camshaft.

Overall Function in the Valve Train

The effective functioning of the rocker lever is essential for maintaining the proper timing and duration of valve events. It ensures that the intake and exhaust valves open and close in sync with the piston’s movement, optimizing the engine’s performance, fuel efficiency, and emissions. The rocker lever’s design and material must withstand the high stresses and temperatures within the engine compartment, ensuring durability and reliability over the engine’s lifespan.

Conclusion

In summary, the 4386047 rocker lever is integral to the valve train’s operation, working seamlessly with other components to enhance engine efficiency and performance. Its compatibility with various Cummins engine models underscores its versatility and importance in maintaining the reliability and efficiency of commercial truck engines.