4940179
Valve Crosshead
Cummins®

The Cummins 4940179 Valve Crosshead is a component designed for use in heavy-duty truck engines. It serves a specific function within the engine’s valve train, contributing to the overall performance and efficiency of the truck. Understanding its purpose and significance is key to appreciating its role in engine operation.

Basic Concepts of Valve Crosshead

A Valve Crosshead is a mechanical component that facilitates the movement of engine valves. It acts as a pivot point, allowing the valve to open and close in response to the camshaft’s motion. The Valve Crosshead interacts with the rocker arm and the valve stem, ensuring precise and reliable valve operation. This interaction is crucial for maintaining the engine’s combustion process, as it directly affects the timing and efficiency of the air-fuel mixture’s intake and exhaust ¹.

Role of the 4940179 Valve Crosshead in Truck Operation

The 4940179 Valve Crosshead plays a role in the operation of a truck engine by ensuring the proper functioning of the valve train. It contributes to engine performance and efficiency by allowing the valves to open and close with precision. This precision is vital for maintaining the engine’s combustion efficiency, which in turn affects the truck’s overall performance, fuel economy, and emissions ².

Key Features of the 4940179 Valve Crosshead

The 4940179 Valve Crosshead is characterized by several key features that enhance its functionality. These include its material composition, which is designed to withstand the high stresses and temperatures of engine operation, and its design elements, which are tailored to ensure smooth and reliable valve movement. Unique characteristics such as its precise engineering and durable construction contribute to its effectiveness in heavy-duty applications ³.

Benefits of Using the 4940179 Valve Crosshead

Utilizing the 4940179 Valve Crosshead offers several advantages. It contributes to improved engine reliability and durability, which can lead to reduced maintenance requirements and extended engine life. Additionally, its design can result in potential cost savings for fleet operators by enhancing engine efficiency and reducing the likelihood of costly repairs ⁴.

Troubleshooting and Maintenance Suggestions

To ensure the optimal performance and longevity of the 4940179 Valve Crosshead, it is important to be aware of common issues that may arise. Regular inspection for signs of wear or damage is recommended, along with adherence to manufacturer-specified maintenance intervals. Proper lubrication and adjustment of the valve train components can also help prevent issues and ensure smooth operation.

Integration with Engine Systems

The 4940179 Valve Crosshead integrates with other engine systems and components to maintain overall engine health and efficiency. Its role in the valve train ensures that the engine’s combustion process is carried out with precision, which is essential for the engine’s performance, fuel efficiency, and emissions control. This integration highlights the importance of each component working in harmony within the engine system.

Historical Development of Valve Crossheads

The evolution of Valve Crosshead technology has seen significant advancements over the years. These advancements have led to improvements in engine performance, durability, and efficiency. The 4940179 model represents a stage in this timeline, incorporating the latest design and material innovations to meet the demands of modern heavy-duty truck engines.

Cummins: A Brief Overview

Cummins Inc. is a well-established manufacturer in the heavy-duty truck industry, known for its wide range of products and strong reputation for quality and reliability. The company’s history is marked by continuous innovation and a commitment to meeting the needs of its customers. The 4940179 Valve Crosshead is part of Cummins’ extensive product line, designed to enhance the performance and efficiency of heavy-duty truck engines.

Valve Crosshead 4940179 Compatibility with Cummins Engines

The Valve Crosshead 4940179, manufactured by Cummins, is a critical component in the operation of various Cummins engine models. This part is designed to fit seamlessly within the architecture of several engine series, ensuring optimal performance and reliability. Below is a detailed overview of the engine compatibility for this specific valve crosshead.

CM2350 Series

• B4.5 CM2350 B129B
• ISB4.5 CM2350 B104
• QSF3.8 CM2350 F107

These engines, part of the CM2350 series, are designed for applications requiring robust and dependable power. The Valve Crosshead 4940179 is engineered to integrate perfectly with these models, facilitating smooth valve operation and enhancing overall engine efficiency.

CM2620 Series

• D4.0 CM2620 D103B
• F3.8 CM2620 F128C
• F3.8 CM2620 F137B
• F4.5 CM2620 F139B
• F4.5 CM2620 F141C
• QSF3.8 CM2880 F112

The CM2620 series engines are known for their versatility and high performance. The Valve Crosshead 4940179 is compatible with these models, ensuring precise valve timing and operation. This compatibility is crucial for maintaining the engine’s performance and longevity.

F102 and F103 Series

• F3.8 F102
• ISF3.8 CM2220 F103

These engines, while part of different series, also benefit from the Valve Crosshead 4940179. This part’s design allows it to fit these models, ensuring that the valves operate correctly and efficiently.

F120B and F123 Series

• F3.8 CM2350 F120B
• ISF4.5 CM2220 F123

The F120B and F123 series engines are designed for specific applications requiring high power output and reliability. The Valve Crosshead 4940179 is compatible with these engines, ensuring that the valves function as intended.

F109 and F139B Series

• ISF3.8 CM2350 F109
• F4.5 CM2620 F139B

These engines are part of the Cummins lineup that demands high precision in valve operation. The Valve Crosshead 4940179 is engineered to fit these models, ensuring that the valves operate smoothly and efficiently.

AN and F137B Series

• ISF3.8 CM2220 AN
• F3.8 CM2620 F137B

The AN and F137B series engines are designed for specific industrial applications. The Valve Crosshead 4940179 is compatible with these models, ensuring that the valves operate correctly and efficiently.

By understanding the compatibility of the Valve Crosshead 4940179 with these Cummins engines, users can ensure that their engines operate at peak performance and reliability.

Role of Part 4940179 Valve Crosshead in Engine Systems

The Valve Crosshead, identified by part number 4940179, is an integral component in the operation of engine systems, particularly in the valve train mechanism. It interfaces directly with the lever and rocker components to ensure efficient and precise valve operation.

Interaction with the Lever

The Valve Crosshead is designed to connect with the lever, which is a pivotal element in the valve train. The lever, often referred to as the valve lever, is responsible for transferring motion from the camshaft to the rocker arm. The Valve Crosshead facilitates this transfer by providing a stable and durable connection point. This ensures that the motion is transmitted smoothly, minimizing wear and tear on both the lever and the Valve Crosshead itself.

Integration with the Rocker

The rocker, or rocker arm, plays a significant role in amplifying the motion from the camshaft to open and close the engine valves. The Valve Crosshead is engineered to fit precisely within the rocker’s pivot point. This fitment allows for a consistent and reliable rocking motion, which is essential for maintaining valve timing and engine performance. The Valve Crosshead’s design ensures that the rocker can pivot with minimal friction, contributing to the overall efficiency of the valve train system.

Overall Functionality

In summary, the Valve Crosshead (part 4940179) serves as a vital link between the lever and the rocker in engine systems. Its role in providing a stable and durable connection ensures that the valve train operates efficiently, contributing to the engine’s overall performance and longevity.

Conclusion

The Cummins 4940179 Valve Crosshead is a critical component in the operation of heavy-duty truck engines. Its role in the valve train ensures precise and reliable valve operation, contributing to engine performance, fuel efficiency, and emissions control. Understanding its features, benefits, and compatibility with various Cummins engine models is essential for maintaining optimal engine health and efficiency.