3907967
Plain Woodruff Key
Cummins®

The Cummins 3907967 Plain Woodruff Key is a specialized component designed for use in heavy-duty truck engines. Its purpose is to secure the position of rotating parts within the engine, ensuring they remain aligned and function correctly. This key plays a role in maintaining the integrity and performance of the engine’s mechanical systems.

Basic Concepts of Plain Woodruff Key

A Plain Woodruff Key is a type of key used in mechanical systems to prevent relative rotation between a shaft and the components mounted on it. It is designed with a semi-circular cross-section, which fits into a matching groove cut into the shaft. This design allows the key to securely hold the component in place, ensuring that it does not move or rotate independently of the shaft. The key’s simple yet effective design makes it a reliable choice for various applications, including heavy-duty truck engines ¹.

Role of the 3907967 Plain Woodruff Key in Truck Operation

The 3907967 Plain Woodruff Key plays a specific role in the operation of heavy-duty trucks by securing the position of rotating components within the engine. It ensures that parts such as gears, pulleys, and sprockets remain aligned with the shaft, which is important for the smooth and efficient operation of the engine. By preventing relative rotation, the key helps maintain the precise timing and synchronization required for optimal engine performance ².

Key Features

The primary features of the 3907967 Plain Woodruff Key include its material, dimensions, and design characteristics. Made from high-quality steel, this key is durable and resistant to wear and tear. Its precise dimensions ensure a perfect fit within the grooves of the shaft, while its semi-circular cross-section provides a secure hold on the components it is designed to support. These features make the 3907967 Plain Woodruff Key well-suited for its intended use in heavy-duty truck engines.

Benefits of Using a Plain Woodruff Key

Incorporating a Plain Woodruff Key like the 3907967 in truck engines offers several advantages. It enhances the efficiency of the engine by ensuring that rotating components remain aligned and function correctly. This alignment contributes to the reliability of the engine, reducing the likelihood of mechanical failures. Additionally, the use of a Plain Woodruff Key can lead to performance enhancements, as it helps maintain the precise timing and synchronization required for optimal engine operation ³.

Installation and Integration

Proper installation and integration of the 3907967 Plain Woodruff Key within the truck’s engine system are vital for ensuring its effectiveness. Best practices include ensuring that the key is correctly aligned within the groove of the shaft and that it is securely in place before operating the engine. Common pitfalls to avoid include using keys that are not the correct size or material, as this can lead to improper fit and potential engine issues.

Troubleshooting and Maintenance

Troubleshooting common issues related to the 3907967 Plain Woodruff Key involves checking for signs of wear or damage, such as cracks or deformations. Regular maintenance, including inspection and replacement of worn keys, can help ensure longevity and optimal performance. Signs of wear or failure to watch for include unusual noises from the engine, misalignment of components, or a decrease in engine performance.

Cummins: A Brief Overview

Cummins Inc. is a well-established manufacturer with a strong reputation in the heavy-duty truck industry. Founded in 1919, the company has a long history of producing high-quality engine components and systems. Cummins’ product range includes a variety of engine parts and accessories designed to enhance the performance and reliability of heavy-duty trucks. The 3907967 Plain Woodruff Key is just one example of the company’s commitment to quality and innovation in the automotive industry.

Compatibility of Part 3907967 with Cummins Engines

The Plain Woodruff Key part number 3907967, manufactured by Cummins, is designed to fit seamlessly within several of their engine models. This key is a component that ensures the proper alignment and operation of various engine parts. Here is a breakdown of its compatibility with specific Cummins engines:

• 4B3.9 and B3.9 G Engines: The 3907967 Woodruff Key is integral to the operation of these engines. It is used to connect the crankshaft to the flywheel or other rotating components, ensuring smooth and efficient engine performance.

• B4.5 Engine: This key is also compatible with the B4.5 engine, where it plays a role in maintaining the alignment of the crankshaft and other rotating assemblies. Its precision fit is essential for the engine’s reliability and longevity.

• QSB3.9 30 CM550 Engine: The 3907967 Woodruff Key is designed to fit within the QSB3.9 30 CM550 engine model. This engine, known for its robust performance, relies on this key to ensure that the crankshaft and other components rotate in unison, preventing any misalignment that could lead to engine failure.

Each of these engines, while distinct in their specifications and applications, shares a common requirement for the precise and reliable operation of the Woodruff Key. This part’s compatibility across these models underscores its versatility and importance in maintaining engine integrity.

Role of Part 3907967 Plain Woodruff Key in Engine Systems

In the context of engine systems, the Part 3907967 Plain Woodruff Key is instrumental in ensuring the secure and precise alignment of rotating components. This key fits into the keyway of a shaft and the corresponding slot in a mating component, such as a gear, pulley, or coupling, to prevent relative motion between the two.

Engine Balancer

When integrated into an engine balancer, the Plain Woodruff Key plays a role. The balancer is designed to counteract the vibrations produced by the engine’s rotating assemblies. The key ensures that the balancer wheel is correctly aligned with the crankshaft. This alignment is essential for the balancer to effectively reduce vibrations, leading to smoother engine operation and prolonged component lifespan.

Balancer

In a balancer setup, the Plain Woodruff Key is used to maintain the positional integrity between the balancer and the shaft. This is particularly important in high-RPM applications where even minor misalignments can lead to increased wear and potential failure of the balancer or connected components. The key’s secure fit helps in distributing the load evenly, which is vital for the balancer’s function in mitigating harmful vibrations.

Engine

Within the engine itself, the Plain Woodruff Key is often employed in the connection between the crankshaft and various driven components such as the flywheel, harmonic balancer, or damper. Its role here is to ensure that these components remain in the correct phase with the crankshaft’s rotation. This is important for the engine’s overall performance, as it affects the timing of power delivery and the synchronization of engine cycles.

The Plain Woodruff Key, through its simple yet effective design, contributes significantly to the reliability and efficiency of engine systems by maintaining the necessary alignment and preventing unwanted movement between critical rotating parts.

Conclusion

The Cummins 3907967 Plain Woodruff Key is a critical component in the operation of heavy-duty truck engines. Its role in securing the alignment of rotating parts ensures the smooth and efficient functioning of the engine. The key’s design, material, and precise dimensions make it well-suited for its intended use, contributing to the reliability and performance of the engine. Proper installation, regular maintenance, and timely replacement of worn keys are essential practices to ensure the longevity and optimal performance of this Cummins part.