3936612
Plain Woodruff Key
Cummins®

The 3936612 Plain Woodruff Key is a component manufactured by Cummins, a well-established name in the commercial truck industry. This part plays a role in the assembly and operation of truck engines and transmissions, contributing to the overall efficiency and reliability of commercial vehicles.

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 a semi-cylindrical key that fits into a matching slot cut along the length of a shaft. When inserted, it creates a secure connection that allows for torque transmission without slippage. Woodruff Keys are commonly used in various machinery to ensure that gears, pulleys, and other components remain fixed in place relative to the shaft ³.

Purpose of the 3936612 Plain Woodruff Key in Truck Operation

The 3936612 Plain Woodruff Key is integral to the operation of commercial trucks. It ensures that components such as gears and pulleys are securely attached to the engine or transmission shafts. This secure attachment is vital for the transmission of power and the smooth operation of the truck’s engine and transmission systems. By maintaining the alignment and position of these components, the key contributes to the functionality and efficiency of the truck’s powertrain ⁴.

Key Features

The 3936612 Plain Woodruff Key is characterized by several features that enhance its performance and durability. It is typically made from high-quality steel, which provides the necessary strength and resistance to wear. The key’s dimensions are precisely engineered to fit specific applications, ensuring a secure and reliable connection. Additionally, its design may include features such as chamfered edges to facilitate easy insertion and removal during maintenance procedures ¹.

Benefits of Using the 3936612 Plain Woodruff Key

Incorporating the 3936612 Plain Woodruff Key into truck maintenance and repair offers several advantages. Its robust construction and precise fit contribute to improved engine performance and reliability. The key’s design also allows for ease of installation, reducing downtime during maintenance procedures. Furthermore, its durability ensures long-term use, making it a cost-effective solution for truck operators ².

Installation Process

Installing the 3936612 Plain Woodruff Key requires careful attention to detail to ensure a secure fit. The process involves cleaning the shaft and keyway to remove any debris or contaminants. The key is then inserted into the keyway, aligning it with the shaft. Tools such as a mallet may be used to gently tap the key into place, ensuring it is fully seated. Safety precautions, such as wearing protective gloves and eyewear, should be observed during installation ⁴.

Troubleshooting and Maintenance

Common issues associated with the 3936612 Plain Woodruff Key include wear and damage due to prolonged use or improper installation. Regular inspection during maintenance checks can help identify problems early. Maintenance tips to ensure longevity and optimal performance include keeping the key and keyway clean and free of debris, and replacing the key if signs of wear or damage are detected. Diagnostic techniques may involve visual inspection and torque testing to assess the key’s condition ⁴.

Compatibility and Application

The 3936612 Plain Woodruff Key is designed for specific models of trucks and engines, ensuring a precise fit and reliable performance. Its application is notable in various commercial truck engines and transmissions, where it plays a role in securing components and facilitating efficient power transmission ³.

Cummins: Manufacturer Overview

Cummins Inc. is a leading manufacturer in the commercial truck industry, known for its wide range of high-quality engine and component products. With a history of innovation and a commitment to quality, Cummins has established a strong reputation for producing reliable and durable automotive components. The company’s dedication to excellence is reflected in its product offerings, including the 3936612 Plain Woodruff Key, which is designed to meet the demanding requirements of commercial truck applications ³.

Cummins Engine Compatibility with Part 3936612

The Plain Woodruff Key, part number 3936612, manufactured by Cummins, is a critical component in various Cummins engine models. This part is essential for the proper functioning of the engine, ensuring the alignment and smooth operation of the crankshaft and other rotating components.

Cummins B Series Engines

The B5.6 CM2670 B152B engine is one of the models that utilize the 3936612 Woodruff Key. This key is integral to maintaining the precise alignment between the crankshaft and the pulley, ensuring efficient power transmission and reducing wear on engine components.

Cummins G Series Engines

The G5.9 and G5.9 CM558 engines also incorporate the 3936612 Woodruff Key. This part is crucial in these engines for maintaining the alignment of the crankshaft with the flywheel or other rotating components, ensuring smooth operation and longevity of the engine.

Cummins ISB Series Engines

The ISB5.9 CM2880 B110, ISB5.9 CM2880 B140, ISB5.9 CM2880 B149, and ISB5.9G CM2180 engines all utilize the 3936612 Woodruff Key. This key is essential in these engines for maintaining the alignment of the crankshaft with the pulley or other rotating components, ensuring efficient power transmission and reducing wear on engine components.

Cummins QSB Series Engines

The QSB5.9 CM2880 B115 and QSB5.9G engines also incorporate the 3936612 Woodruff Key. This part is crucial in these engines for maintaining the alignment of the crankshaft with the flywheel or other rotating components, ensuring smooth operation and longevity of the engine.

Cummins B5.9 Series Engines

The B5.9 G and B5.9 GAS PLUS CM556 engines utilize the 3936612 Woodruff Key. This key is essential in these engines for maintaining the alignment of the crankshaft with the pulley or other rotating components, ensuring efficient power transmission and reducing wear on engine components.

Cummins 4B3.9 Series Engines

The 4B3.9 engine also incorporates the 3936612 Woodruff Key. This part is crucial in this engine for maintaining the alignment of the crankshaft with the pulley or other rotating components, ensuring smooth operation and longevity of the engine.

The 3936612 Woodruff Key is a vital component across various Cummins engine models, ensuring the proper alignment and smooth operation of the crankshaft and other rotating components. Its use in these engines highlights its importance in maintaining engine efficiency and longevity ³.

Role of Part 3936612 Plain Woodruff Key in Engine Components

Camshaft

The plain Woodruff key is instrumental in securing the camshaft to the crankshaft, ensuring precise alignment and timing. This alignment is essential for the proper operation of the valve train, which in turn affects the engine’s performance and efficiency ⁴.

Connecting Rod

In the connecting rod assembly, the plain Woodruff key is used to maintain the alignment between the connecting rod and the crankshaft journal. This ensures smooth and consistent power transfer from the piston to the crankshaft, contributing to the engine’s overall stability and performance ⁴.

Connecting Rod and Piston

When considering the connecting rod and piston as a combined unit, the plain Woodruff key plays a role in maintaining the integrity of the assembly. Proper alignment facilitated by the key ensures that the piston moves smoothly within the cylinder, reducing wear and enhancing engine longevity ⁴.

Cylinder Head

Although the plain Woodruff key is not directly part of the cylinder head assembly, its role in maintaining camshaft alignment indirectly affects the cylinder head’s function. Proper camshaft timing ensures that the valves open and close at the correct moments, which is vital for optimal combustion and engine performance ⁴.

Injector

In engines equipped with fuel injectors, the precise timing of fuel delivery is paramount. The plain Woodruff key, by ensuring accurate camshaft timing, indirectly supports the injector’s function by maintaining the correct sequence of fuel injection in relation to the piston’s position ⁴.

Long Block

In a long block assembly, which includes the engine block, crankshaft, camshaft, pistons, and other essential components, the plain Woodruff key is vital for the proper functioning of the camshaft and crankshaft. This ensures that all moving parts operate in harmony, leading to efficient and reliable engine performance ⁴.

Performance Parts

For engines modified with performance parts, the plain Woodruff key remains a fundamental component. It ensures that high-performance camshafts and crankshafts are properly aligned, allowing for the enhanced power and efficiency that performance modifications aim to achieve ⁴.

Service Block

In a service block, where the engine is partially disassembled for maintenance or repair, the plain Woodruff key is crucial for reassembling the camshaft and crankshaft correctly. This ensures that the engine returns to operation with the same precision and reliability as before the service ⁴.

Short Block

A short block, consisting of the engine block, crankshaft, pistons, and related components, relies on the plain Woodruff key to maintain the alignment of the crankshaft and any attached components. This alignment is essential for the smooth operation of the engine’s fundamental moving parts ⁴.

Short Block Kit

When using a short block kit for engine rebuilds or replacements, the plain Woodruff key is a key component in ensuring that the crankshaft and camshaft are properly aligned. This alignment is essential for the successful integration of the kit’s components and the overall performance of the rebuilt engine ⁴.

Conclusion

The 3936612 Plain Woodruff Key is a critical component in the operation and maintenance of commercial truck engines and transmissions. Its role in securing components and ensuring precise alignment contributes to the efficiency, reliability, and longevity of the engine. Proper installation, maintenance, and understanding of its application are essential for optimal engine performance.