4940547
Shutoff Valve Shaft
Cummins®

The Cummins 4940547 Shutoff Valve Shaft is a component designed for use in heavy-duty truck fuel systems. Its purpose is to regulate the flow of fuel to the engine, ensuring that the truck operates efficiently and reliably. The shutoff valve shaft plays a role in maintaining the proper function of the fuel system, which is vital for the overall performance of the vehicle.

Basic Concepts of Shutoff Valve Shaft

Shutoff valve shafts are integral to the operation of fuel systems in diesel engines. They function by controlling the opening and closing of the fuel supply to the engine. When the engine is started, the shutoff valve shaft allows fuel to flow, enabling combustion. Conversely, when the engine is turned off, the shaft closes the valve, stopping the fuel supply. This mechanism helps in preventing fuel leakage and ensures that the engine starts and stops smoothly ¹.

Role of the Shutoff Valve Shaft in Truck Operation

Within the context of a truck’s fuel system, the shutoff valve shaft operates in conjunction with other components such as the fuel pump, injectors, and the engine control unit (ECU). It receives signals from the ECU to open or close the valve based on the engine’s operational requirements. This interaction ensures that the engine receives the precise amount of fuel needed for combustion, which directly impacts engine performance, fuel efficiency, and emissions ².

Key Features of the Cummins 4940547 Shutoff Valve Shaft

The Cummins 4940547 Shutoff Valve Shaft is characterized by several design elements that enhance its functionality and durability. It is constructed from high-quality materials that resist wear and corrosion, ensuring longevity in demanding operating conditions. The shaft’s design includes precise machining to ensure smooth operation and reliable sealing. Additionally, it may feature unique attributes such as integrated sensors for monitoring valve position and fuel flow, contributing to the overall efficiency of the fuel system ³.

Benefits of Using the Cummins 4940547 Shutoff Valve Shaft

Utilizing the Cummins 4940547 Shutoff Valve Shaft offers several advantages. It contributes to improved fuel efficiency by ensuring that fuel is delivered to the engine only when needed. This precise control over fuel flow can lead to enhanced engine performance and reduced emissions. Furthermore, the robust construction and reliable operation of the shaft contribute to the overall reliability of the truck’s fuel system, minimizing the risk of unexpected failures.

Troubleshooting and Maintenance Suggestions

To maintain optimal performance of the shutoff valve shaft, regular inspection and maintenance are recommended. Common issues may include difficulty in starting the engine, irregular engine operation, or fuel leaks, which could indicate problems with the shutoff valve shaft. Maintenance procedures should include checking for wear or damage, ensuring proper alignment and operation, and replacing the shaft if necessary. Following manufacturer guidelines for maintenance intervals and procedures will help ensure the longevity and reliability of the component.

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 producing high-quality components for heavy-duty trucks and other applications. The company’s commitment to innovation, quality, and customer satisfaction has made it a trusted name in the automotive industry, particularly for those seeking reliable and efficient power solutions.

Shutoff Valve Shaft 4940547 Compatibility with Cummins Engines

The Shutoff Valve Shaft 4940547, manufactured by Cummins, is a critical component that fits into various Cummins engine models. This part is essential for the proper operation of the engine’s shutoff valve, ensuring that the engine can be safely and efficiently stopped when required.

Compatibility with Specific Engine Models

The Shutoff Valve Shaft 4940547 is compatible with the following Cummins engine models:

• 6C8.3
• C GAS PLUS CM556
• ISC CM554
• ISC CM850
• ISL CM554
• ISL9 CM2150 SN
• ISL9.5 CM2880 L138
• L GAS PLUS CM556
• L8.9
• L8.9G CMOH2.0 L125B
• QSC8.3 CM554
• QSC8.3 CM850 (CM2850)
• QSL8.9 CM2150 L141
• QSL9 CM554
• QSL9 CM850 (CM2850)

Grouping of Compatible Engines

For ease of understanding, the compatible engines can be grouped based on their model series:

• ISC Series:

  • ISC CM554
  • ISC CM850

• ISL Series:

  • ISL CM554
  • ISL9 CM2150 SN
  • ISL9.5 CM2880 L138

• QSC Series:

  • QSC8.3 CM554
  • QSC8.3 CM850 (CM2850)

• QSL Series:

  • QSL8.9 CM2150 L141
  • QSL9 CM554
  • QSL9 CM850 (CM2850)

• Other Models:

  • 6C8.3
  • C GAS PLUS CM556
  • L GAS PLUS CM556
  • L8.9
  • L8.9G CMOH2.0 L125B

This compatibility ensures that the Shutoff Valve Shaft 4940547 can be used across a wide range of Cummins engines, providing a reliable solution for maintaining engine functionality.

Role of Part 4940547 Shutoff Valve Shaft in Engine Systems

The 4940547 Shutoff Valve Shaft is integral to the operation of various engine systems, ensuring precise control over the flow of fluids or gases. This component works in conjunction with several other parts to maintain efficient and reliable engine performance.

Interaction with Corrosion Resistor Components

In engine systems where corrosion is a concern, the Shutoff Valve Shaft often interfaces with corrosion resistor components. These components, such as the corrosion resistor head and the corrosion resistor itself, are designed to protect the engine from the detrimental effects of corrosion. The Shutoff Valve Shaft, by controlling the flow, helps in regulating the exposure of these components to corrosive agents, thereby extending their lifespan and maintaining their effectiveness.

Location and Functionality

The location of the Shutoff Valve Shaft within the engine system is strategically chosen to optimize its function. It is typically positioned near critical flow points where precise control is necessary. This allows the shaft to effectively manage the opening and closing of valves, ensuring that the flow of fluids or gases is consistent and within the desired parameters.

Integration with Resistors

Resistors play a significant role in engine systems by offering resistance to certain flows, which can be electrical or fluidic. The Shutoff Valve Shaft complements the function of these resistors by providing an additional layer of control. When the shaft is activated, it can either enhance or reduce the resistance offered by the resistors, depending on the system’s requirements. This dynamic interaction ensures that the engine operates smoothly under varying conditions.

Overall System Harmony

The Shutoff Valve Shaft’s role extends beyond individual components; it contributes to the overall harmony of the engine system. By precisely controlling flow rates and interacting with corrosion-resistant components, it helps in maintaining the integrity and efficiency of the engine. This component ensures that all parts of the system work together seamlessly, leading to optimal engine performance and longevity.

Conclusion

The Cummins 4940547 Shutoff Valve Shaft is a vital component in the fuel systems of heavy-duty trucks, ensuring efficient and reliable engine operation. Its precise control over fuel flow, robust construction, and compatibility with various Cummins engine models make it an essential part for maintaining engine functionality and performance.