4940930
Flywheel
Cummins®

The Cummins 4940930 Flywheel is a component designed for heavy-duty truck engines, playing a significant role in the overall operation of the vehicle. This flywheel is engineered to enhance engine performance and efficiency, contributing to the smooth and reliable operation of heavy-duty trucks.

Basic Concepts of a Flywheel

A flywheel is a mechanical device that stores rotational energy and smooths out the power delivery of an engine. It operates on the principle of inertia, maintaining rotational speed during the power strokes and providing energy during the non-power strokes. The flywheel is connected to the crankshaft and interacts with the starter motor, clutch, and transmission, ensuring consistent engine operation ¹.

Purpose of the 4940930 Flywheel

The Cummins 4940930 Flywheel is specifically designed to enhance the operation of heavy-duty truck engines. It plays a role in maintaining consistent rotational speed, which contributes to engine smoothness and efficiency. By storing and releasing energy as needed, the flywheel helps to balance the engine’s power delivery, reducing vibrations and improving overall performance ².

Key Features

The Cummins 4940930 Flywheel is constructed with high-quality materials to ensure durability and performance. Its design includes precise balancing to minimize vibrations and enhance smooth operation. The flywheel’s weight and dimensions are optimized to provide the necessary inertia for efficient engine operation. Additionally, it features a robust construction that can withstand the demanding conditions of heavy-duty truck use ³.

Benefits

The Cummins 4940930 Flywheel offers several advantages, including improved engine smoothness, enhanced fuel efficiency, and increased durability. By maintaining consistent rotational speed, it contributes to a more stable and efficient engine operation. The flywheel’s design also helps to reduce wear on other engine components, leading to longer service intervals and reduced maintenance costs.

Installation and Compatibility

Proper installation of the Cummins 4940930 Flywheel is crucial for optimal performance. It is compatible with specific Cummins engine models, and installation should follow manufacturer guidelines to ensure correct fitment and function. Attention to detail during installation will help to avoid common issues and ensure the flywheel operates as intended.

Maintenance and Troubleshooting

Regular maintenance of the Cummins 4940930 Flywheel is important for its longevity and performance. This includes checking for signs of wear, ensuring proper alignment, and addressing any issues promptly. Common problems may include excessive wear, imbalance, or damage from improper installation. Troubleshooting these issues involves inspecting the flywheel for damage, rebalancing if necessary, and replacing worn components.

Performance Enhancements

The Cummins 4940930 Flywheel can contribute to performance enhancements in heavy-duty trucks. By providing consistent rotational energy, it supports smoother power delivery and improved engine efficiency. Additionally, aftermarket options and modifications can further optimize its function, allowing for increased performance and customization to meet specific truck requirements.

Cummins Corporation

Cummins Inc. is a leading manufacturer in the automotive industry, known for its commitment to quality and innovation. With a history of producing reliable and high-performance components, Cummins has established a reputation for excellence. The company’s dedication to advancing technology and maintaining high standards ensures that its products, like the 4940930 Flywheel, deliver superior performance and durability.

Cummins Flywheel 4940930 Compatibility

The Cummins flywheel part number 4940930 is designed to fit a variety of Cummins engines, ensuring smooth and reliable operation across different engine models. This flywheel is engineered to work seamlessly with the following engine types:

ISB/ISD Series Engines

• ISB/ISD 4.5 CM2150 B119
• ISB/ISD 6.7 CM2150 SN

These engines are part of the Cummins ISB/ISD series, known for their robust performance and efficiency in various applications, from commercial vehicles to industrial machinery.

ISBE Series Engines

• ISBE CM2150
• ISBE4 CM850

The ISBE series engines are designed for heavy-duty applications, providing powerful performance and durability. The ISBE CM2150 and ISBE4 CM850 are specifically engineered to meet the demands of high-performance and heavy-duty operations.

6B5.9 Series Engine

• 6B5.9

The 6B5.9 engine is another model in the Cummins lineup, recognized for its reliability and efficiency in various applications. The flywheel part number 4940930 is compatible with this engine, ensuring optimal performance and longevity.

The compatibility of the flywheel part number 4940930 across these engines highlights its versatility and importance in maintaining the smooth operation of Cummins engines.

Role of Part 4940930 Flywheel in Engine Systems

The flywheel, specifically part 4940930, is an integral component in the operation of an engine system. It serves multiple functions that contribute to the overall efficiency and performance of the engine.

Energy Storage and Smooth Operation

The primary role of the flywheel is to store rotational energy. When the engine’s pistons move, they create rotational force that is transferred to the flywheel. This stored energy helps maintain the engine’s momentum between power strokes, ensuring a smoother and more consistent operation.

Clutch Engagement

In manual transmission vehicles, the flywheel works in conjunction with the clutch. When the clutch pedal is pressed, the clutch disengages from the flywheel, allowing the driver to change gears without interrupting the engine’s operation. Once the pedal is released, the clutch re-engages with the flywheel, transferring power from the engine to the transmission.

Vibration Dampening

The flywheel also plays a significant role in reducing vibrations within the engine system. By providing a heavy, rotating mass, it helps to absorb and dampen the vibrations produced by the reciprocating motion of the pistons. This not only enhances the driving comfort but also contributes to the longevity of the engine components.

Starter Motor Interaction

During engine start-up, the flywheel interacts with the starter motor. The starter motor’s pinion gear engages with the flywheel’s ring gear to crank the engine. The flywheel’s mass helps in providing the necessary inertia to start the engine smoothly.

Balance and Stability

The flywheel contributes to the overall balance and stability of the engine. Its uniform mass distribution helps in counteracting the imbalances caused by the movement of other engine components, such as the pistons and crankshaft. This balance is essential for the engine’s smooth operation and durability.

Conclusion

In summary, the Cummins 4940930 Flywheel is a multifaceted component that enhances the engine’s performance, smoothness, and reliability through energy storage, clutch engagement, vibration dampening, starter motor interaction, and balance. Its compatibility with various Cummins engines underscores its versatility and importance in maintaining the smooth operation of heavy-duty truck engines.