3907804
Engine Crankshaft
Cummins®

The 3907804 Engine Crankshaft is a component manufactured by Cummins, a well-established name in the commercial truck engine industry. This crankshaft is integral to the operation of commercial truck engines, contributing to their efficiency and performance.

Basic Concepts of Engine Crankshafts

An engine crankshaft is a mechanical part that plays a role in converting the linear motion of the pistons into rotational motion. This conversion is fundamental to the operation of an internal combustion engine, as it allows the engine to produce the torque necessary to drive the vehicle ¹.

Purpose of the 3907804 Engine Crankshaft

The 3907804 Engine Crankshaft is designed to facilitate the conversion of linear piston motion into rotational motion within a truck engine. It operates as part of the engine’s power cycle, ensuring that the energy produced by the combustion of fuel is effectively transferred to the drivetrain ².

Key Features

The 3907804 Engine Crankshaft is characterized by its robust design and the use of high-quality materials. These attributes contribute to its performance and durability. The crankshaft’s design includes features that enhance its balance and reduce vibration, which can lead to improved engine smoothness and longevity ³.

Benefits

The 3907804 Engine Crankshaft offers several benefits, including improved engine efficiency and reliability. Its design and material composition may also contribute to potential increases in power output, making it a valuable component for commercial truck engines ⁴.

Installation Process

Installing the 3907804 Engine Crankshaft involves several steps to ensure proper fitting and function. It is important to follow manufacturer guidelines, which may include aligning the crankshaft with the engine block, securing it with appropriate fasteners, and ensuring that all clearances and tolerances are within specified limits.

Troubleshooting Common Issues

Common issues with engine crankshafts can include wear, misalignment, or damage. Troubleshooting these issues may involve inspecting the crankshaft for signs of wear, checking alignment with other engine components, and addressing any damage promptly to prevent further engine damage.

Maintenance Tips

To prolong the life of the 3907804 Engine Crankshaft, regular maintenance is recommended. This may include checking for proper lubrication, inspecting for wear or damage, and following manufacturer guidelines for replacement intervals. Proper maintenance can help ensure the crankshaft continues to operate efficiently and reliably.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and a broad product range, Cummins has established a strong reputation in the commercial truck industry for producing reliable and high-performance engine components.

Engine Crankshaft 3907804 Compatibility with Cummins Engines

The Cummins Engine Crankshaft part number 3907804 is designed to fit a variety of Cummins engines, ensuring compatibility across different models. Here is a detailed look at the engines with which this crankshaft is compatible:

B5.9 Series

• B5.9 G
• B5.9 GAS PLUS CM556

These engines are part of the B5.9 series, which are known for their reliability and performance in various applications. The crankshaft part 3907804 is engineered to fit seamlessly within these models, providing the necessary strength and durability for optimal engine operation.

G5.9 Series

• G5.9
• G5.9 CM558

The G5.9 series engines, including the G5.9 and G5.9 CM558, are designed for heavy-duty applications. The crankshaft part 3907804 is specifically tailored to meet the demands of these engines, ensuring smooth operation and longevity.

ISB Series

• ISB CM550
• ISB5.9G CM2180

The ISB series, which includes the ISB CM550 and ISB5.9G CM2180, is known for its efficiency and power. The crankshaft part 3907804 is compatible with these engines, providing a robust solution that enhances engine performance and reliability.

6B5.9 Series

• 6B5.9

The 6B5.9 engine is part of the 6B series, designed for high-performance applications. The crankshaft part 3907804 is engineered to fit this engine, ensuring that it can handle the rigorous demands of its intended use.

By ensuring compatibility with these various engines, the Cummins Engine Crankshaft part number 3907804 provides a versatile solution for maintaining and upgrading Cummins engines across different series and models.

Role of Part 3907804 Engine Crankshaft in Various Engine Systems

The Part 3907804 Engine Crankshaft is a fundamental component that interacts with several engine systems to ensure efficient and reliable operation. Here’s how it integrates with various engine configurations:

Interaction with Cylinder Block and Cylinder Head

The crankshaft is housed within the cylinder block, where it converts the linear motion of the pistons into rotational motion. This rotational motion is essential for driving the engine’s components. The cylinder head, which houses the valves and combustion chambers, works in tandem with the crankshaft. As the pistons move up and down within the cylinders, driven by the crankshaft, the valves open and close to allow the intake and exhaust of gases, facilitating the combustion process.

Integration with Short Blocks

In a short block configuration, which includes the cylinder block, crankshaft, pistons, and connecting rods, the crankshaft plays a pivotal role. It ensures that the pistons’ movements are synchronized, allowing for smooth engine operation. Whether it’s a Short 6BT block, Short E2 Block, or Short E3 Block, the crankshaft’s precise engineering ensures that the engine maintains balance and efficiency.

Role in Long Block and Service Block

A long block includes all components of the short block plus the cylinder head(s), valve train, and sometimes the fuel injection system. Here, the crankshaft’s function extends to interacting with the valve train components, ensuring that the timing of valve operations aligns with the pistons’ movements. In a service block, which is often a refurbished version of a short or long block, the crankshaft’s condition is crucial for restoring the engine to optimal performance.

Specific Configurations

• Short 6B Block: The crankshaft in this configuration ensures that the unique design and specifications of the 6B engine are met, providing the necessary torque and power.
• Short E2 180 Block and Short E215/235 Block: These configurations require the crankshaft to handle specific load and performance characteristics, ensuring that the engine delivers the expected power output and efficiency.
• Short Block 6-BT: In this setup, the crankshaft must accommodate the distinct features of the 6-BT engine, including its turbocharging system, to maintain performance and reliability.

Top Level Assembly

In an Engine Top Level Assembly that includes the crankshaft, the component ensures that all upper engine parts, such as the cylinder head and valve train, operate in harmony with the lower end. This assembly relies on the crankshaft to provide the necessary rotational force to drive the engine’s accessories and maintain overall engine balance.

The Part 3907804 Engine Crankshaft is integral to the functioning of these engine systems, ensuring that the conversion of linear piston motion to rotational motion is achieved with precision and reliability.

Conclusion

The 3907804 Engine Crankshaft is a critical component in Cummins engines, designed to enhance engine performance, reliability, and efficiency. Its robust design, compatibility with various Cummins engine models, and integration with different engine systems make it a versatile and essential part for commercial truck engines. Regular maintenance and proper installation are key to ensuring the longevity and optimal performance of this Cummins part.