4928699
Rocker Lever Shaft
Cummins®

The Rocker Lever Shaft 4928699 by Cummins is a component designed for heavy-duty truck engines. It plays a role in the valve train mechanism, facilitating the operation of the engine’s valves. Its design and function are integral to the efficient and reliable performance of the engine.

Basic Concepts of Rocker Lever Shafts

A Rocker Lever Shaft is a mechanical component that operates within the valve train of an engine. Its function is to transfer motion from the camshaft to the valves, allowing them to open and close at precise intervals. This interaction ensures that the air-fuel mixture enters the combustion chamber at the correct time, and exhaust gases are expelled efficiently ¹.

Purpose of the 4928699 Rocker Lever Shaft

This Cummins part is designed to enhance the operation of a truck engine by contributing to valve actuation. It ensures that the valves open and close in sync with the engine’s operational cycle, which is vital for maintaining engine performance. This component’s role in the valve train mechanism is to provide a mechanical advantage, allowing for more efficient valve operation and contributing to the overall performance of the engine.

Key Features

The 4928699 Rocker Lever Shaft boasts several key features that enhance its performance and durability. It is constructed from high-quality materials, ensuring resistance to wear and corrosion. Its design includes precision-machined surfaces and robust mounting points, which contribute to its reliability under the demanding conditions of heavy-duty truck engines. Additionally, the shaft may incorporate features such as hardened contact points to reduce friction and wear, and a balanced design to minimize vibration.

Benefits

The benefits of the 4928699 Rocker Lever Shaft include improved engine efficiency, reliability, and longevity. By ensuring precise valve actuation, it contributes to optimal combustion, which can lead to better fuel efficiency and reduced emissions ². Its durable construction and design features also help to extend the component’s service life, reducing the need for frequent replacements and maintenance.

Installation Process

Installing the 4928699 Rocker Lever Shaft requires careful attention to detail to ensure optimal function. The process involves removing the old shaft, cleaning the mounting area, and aligning the new shaft with the camshaft and valves. Proper tools and torque specifications should be used to secure the shaft in place. Alignment checks are necessary to confirm that the shaft is correctly positioned relative to the camshaft and valves, ensuring smooth operation and preventing damage to other engine components.

Common Issues and Troubleshooting

Common problems associated with Rocker Lever Shafts include wear, noise, or failure due to material fatigue or improper installation. Troubleshooting steps may involve inspecting the shaft for signs of wear or damage, checking the alignment and clearances, and ensuring that all mounting points are secure. Addressing these issues promptly can help to maintain engine performance and prevent more severe engine damage.

Maintenance Tips

Regular maintenance practices are vital to ensure the longevity and efficient operation of the 4928699 Rocker Lever Shaft. This includes periodic inspections for wear or damage, and adhering to lubrication guidelines to reduce friction and wear. Maintenance intervals should be in accordance with the manufacturer’s recommendations to ensure the component remains in optimal condition.

Role in Engine Performance

The 4928699 Rocker Lever Shaft influences engine performance by ensuring precise valve actuation, which is crucial for optimal combustion. This can lead to improvements in fuel efficiency, power output, and emission levels. Its role in the valve train mechanism is fundamental to the engine’s ability to operate efficiently and reliably under various conditions.

Cummins Corporation 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 quality and innovation in the automotive and heavy-duty truck industry. The company’s product range includes a variety of engines and components designed to meet the demanding requirements of commercial vehicles and industrial applications.

Compatibility of Rocker Lever Shaft Part 4928699 with Cummins Engines

This part is designed to fit a variety of Cummins engines. It is integral in the operation of the engine’s valve train, ensuring smooth and reliable engine performance. Below is a detailed description of the engines that this part is compatible with, grouped by engine series and model for clarity.

Cummins B Series Engines

• B4.5 CM2350 B129B
• B4.5 RGT
• B5.6 CM2670 B152B
• B6.7 CM2350 B135B
• B6.7 CM2670 B153B
• B6.7 CM2670 B164C
• B6.7 G CMOH6.0 B125

Cummins D Series Engines

• D4.0 CM2620 D103B

Cummins F Series Engines

• F3.8 CM2350 F120B
• F3.8 CM2350 F128C
• F3.8 CM2620 F137B
• F3.8 F102
• F4.5 CM2620 F139B
• F4.5 CM2620 F141C

Cummins ISB Series Engines

• ISB (Chrysler)
• ISB CM2150
• ISB CM550
• ISB CM850
• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN
• ISB4.5 CM2350 B104
• ISB5.9 CM2880 B110
• ISB5.9 CM2880 B140
• ISB5.9 CM2880 B149

This part is engineered to meet the specific requirements of these engines, ensuring compatibility and optimal performance. It is crucial to verify the part number and engine specifications to ensure proper fitment and functionality.

Understanding the Integration of Part 4928699 Rocker Lever Shaft in Engine Systems

The part 4928699 Rocker Lever Shaft is a fundamental component in the operation of various engine systems, particularly within the rocker lever assembly. This shaft is designed to interact with several key components to ensure the efficient transfer of motion from the camshaft to the valves.

Interaction with the Rocker Lever Assembly

The Rocker Lever Shaft is integral to the Rocker Lever Assembly, where it supports the rocker levers. Each rocker lever is positioned on the shaft and is responsible for amplifying the motion from the camshaft lobe. This amplified motion is then transferred to the valves, allowing them to open and close at precise intervals.

Role in the Long Block and Long Block Kit

In a Long Block, which includes the cylinder block, crankshaft, pistons, and camshaft, the Rocker Lever Shaft plays a significant role in the valve train mechanism. It ensures that the valves operate in sync with the engine’s timing, which is essential for optimal performance and efficiency.

When considering a Long Block Kit, which typically provides all the components needed to rebuild the engine excluding ancillary parts like the fuel system and ignition components, the Rocker Lever Shaft is often included. Its presence in the kit ensures that the valve train is complete and ready for installation, facilitating a smoother rebuild process.

Support and Stability

The Rocker Lever Support is another component that works in conjunction with the Rocker Lever Shaft. This support structure holds the shaft in place, providing the necessary stability and alignment for the rocker levers to function correctly. Without proper support, the shaft could misalign, leading to inefficient valve operation and potential engine damage.

Comprehensive Engine Functionality

In summary, the Rocker Lever Shaft (part 4928699) is a key element in the valve train system of an engine. Its proper installation and interaction with the rocker lever, rocker lever assembly, and rocker lever support are essential for the overall functionality and performance of the engine. Ensuring that this component is correctly integrated into the long block or long block kit is vital for maintaining the engine’s operational integrity.

Conclusion

The 4928699 Rocker Lever Shaft by Cummins is a critical component for the efficient operation of heavy-duty truck engines. Its role in the valve train mechanism ensures precise valve actuation, contributing to optimal engine performance, fuel efficiency, and reduced emissions. Proper installation, maintenance, and understanding of its integration within engine systems are essential for maximizing the benefits of this component.