3934047
Piston Pin
Cummins®

The Cummins 3934047 Piston Pin is a component designed for use in commercial truck engines. Its purpose is to facilitate the efficient transfer of motion from the piston to the connecting rod, which is a fundamental aspect of engine operation. This part is engineered to withstand the rigorous demands of heavy-duty applications, ensuring reliable performance and durability in commercial trucking environments.

Basic Concepts of Piston Pins

A piston pin, also known as a wrist pin, is a cylindrical component that connects the piston to the connecting rod within an engine. Its function is to allow the piston to oscillate as the engine operates, converting the linear motion of the piston into rotational motion of the crankshaft via the connecting rod. The piston pin must endure significant stress and load, making its design and material critical for engine performance and longevity ¹.

Role of the 3934047 Piston Pin in Truck Operation

The Cummins 3934047 Piston Pin plays a specific role in the engine’s functionality by enabling the smooth and efficient transfer of motion from the piston to the connecting rod. This transfer is vital for the engine’s operation, as it directly influences the engine’s ability to convert fuel into mechanical energy. The design of the 3934047 Piston Pin ensures minimal friction and wear, contributing to the overall efficiency and reliability of the truck’s engine ².

Key Features

The Cummins 3934047 Piston Pin is characterized by several key features that enhance its performance and durability. These include its material composition, which is selected for optimal strength and resistance to wear. The design specifications of the pin are tailored to meet the demands of heavy-duty applications, ensuring it can withstand high loads and stresses. Additionally, any unique attributes, such as specialized coatings or precision machining, further contribute to its performance capabilities.

Benefits

The Cummins 3934047 Piston Pin offers several benefits that contribute to improved engine efficiency, reduced wear and tear, and enhanced overall performance of the truck. By facilitating a smooth transfer of motion, it helps to maintain engine efficiency. Its durable construction reduces the likelihood of wear and tear, leading to longer component life and lower maintenance costs. Furthermore, the pin’s design contributes to the engine’s overall performance, ensuring that the truck operates at its best.

Troubleshooting and Maintenance

Common issues associated with piston pins can include wear, misalignment, or damage due to excessive stress. Troubleshooting these problems often involves inspecting the pin and connecting components for signs of wear or damage, and ensuring proper alignment and lubrication. Maintenance practices to ensure the longevity and optimal performance of the 3934047 Piston Pin include regular inspections, proper lubrication, and timely replacement of worn components. Adhering to manufacturer guidelines for maintenance and operation can help prevent issues and ensure the pin continues to perform effectively.

Compatibility with Cummins Engines

The 3934047 Piston Pin is compatible with a range of Cummins engines, including but not limited to the 4B3.9, 6B5.9, B3.3, B5.6, B5.9, G5.9, ISB3.9, ISB5.9, QSB3.9, QSB5.9, and various other models. This compatibility ensures that the pistons move smoothly within the engine cylinders, maintaining the integrity of the piston assembly and preventing mechanical failures.

Role of Part 3934047 Piston Pin in Engine Systems

The 3934047 Piston Pin is an integral component in various engine systems, facilitating the smooth operation of the engine piston within the cylinder. This pin connects the piston to the connecting rod, allowing for the efficient transfer of force from the combustion process to the crankshaft.

In the Short E2 Increment Block, the piston pin ensures that the piston moves precisely within the cylinder, contributing to the engine’s overall efficiency and performance. Similarly, in the Short E3 Increment Block and Short Euro1 Block, the pin plays a vital role in maintaining the structural integrity and operational smoothness of the piston and connecting rod assembly.

When considering the Connecting Rod and Connecting Rod and Piston components, the piston pin is essential for allowing the piston to oscillate within the cylinder while the connecting rod converts this linear motion into rotational motion for the crankshaft.

In the Cylinder Head setup, although the piston pin does not directly interact with the cylinder head, its reliable function ensures that the piston’s movement is consistent, which is important for the timing and efficiency of the combustion process.

For Engine Piston variants, including the Standard Kit, Oversized 1 Kit, Oversized 2 Kit, 0.5 Oversized Kit, and 1 Oversized Kit, the piston pin is a fundamental part that allows these pistons to fit securely within the connecting rod, ensuring optimal performance regardless of the piston size.

The Injector relies on the precise movement of the piston, which is enabled by the piston pin, to deliver fuel at the correct time in the combustion cycle.

In Piston Kit and Piston Ring Kit assemblies, the piston pin ensures that the piston components are held together firmly, allowing for efficient heat dissipation and reduced wear.

For Performance Parts and Overhaul Kits, the inclusion of a high-quality piston pin like part 3934047 is essential to enhance engine performance and durability.

In Short Block and Short Block Kit configurations, the piston pin contributes to the reliable operation of the engine by ensuring that the piston moves smoothly within the cylinder, which is fundamental for the engine’s power output and longevity.

Lastly, in specialized blocks like the Short E2 Block and Short E215/235 Block, the piston pin’s role remains consistent: to provide a secure connection between the piston and the connecting rod, ensuring efficient force transmission and smooth engine operation.

Conclusion

The Cummins 3934047 Piston Pin is a critical component in the operation of various Cummins engines, ensuring smooth and reliable engine performance. Its design and material are tailored to meet the demands of heavy-duty applications, contributing to the overall efficiency and reliability of the truck’s engine. Regular maintenance and adherence to manufacturer guidelines are essential to ensure the longevity and optimal performance of this part.