4938325
Clutch Disc
Cummins®

The Cummins 4938325 Clutch Disc is a component designed for use in commercial trucks, playing a significant role in the vehicle’s transmission system. Its purpose is to facilitate the engagement and disengagement of the engine from the transmission, allowing for smooth gear changes and efficient power transfer. The significance of this part lies in its ability to enhance the operational efficiency and reliability of commercial trucks, which are often subjected to demanding conditions ¹.

Basic Concepts of Clutch Discs

A clutch disc is a component within the clutch system of a truck. It consists of several parts, including friction materials, a metal backing plate, and springs. The friction materials are responsible for transmitting torque from the engine to the transmission, while the backing plate provides structural support. Springs help in maintaining the alignment and integrity of the friction materials. The clutch disc functions by engaging with the pressure plate and flywheel to transfer power smoothly and efficiently ².

Role of the 4938325 Clutch Disc in Truck Operation

The Cummins 4938325 Clutch Disc plays a role in the operation of a truck by interacting with the pressure plate and flywheel. When the clutch pedal is depressed, the pressure plate releases the clutch disc, allowing the driver to change gears without interrupting the engine’s operation. Upon releasing the pedal, the pressure plate clamps the clutch disc against the flywheel, re-engaging the engine with the transmission and allowing power to be transmitted to the wheels. This interaction is vital for the smooth and efficient operation of the truck ².

Key Features of the 4938325 Clutch Disc

The Cummins 4938325 Clutch Disc is characterized by several key features that enhance its performance. It is constructed from high-quality materials, including durable friction materials and a robust metal backing plate. The design incorporates advanced features such as optimized spring configurations and precise manufacturing tolerances. These elements contribute to the disc’s ability to withstand high loads and operate efficiently in demanding conditions ².

Benefits of Using the 4938325 Clutch Disc

Using the Cummins 4938325 Clutch Disc offers several benefits. Its durable construction and high-quality materials contribute to improved longevity and reliability. The advanced design elements enhance its performance, providing smooth and efficient power transfer. Additionally, the disc’s compatibility with various truck models makes it a versatile choice for fleet operators and maintenance professionals ².

Installation Considerations

Proper installation of the Cummins 4938325 Clutch Disc is important for ensuring optimal performance and longevity. Guidelines provided by Cummins should be followed to ensure correct alignment and secure fitting. This may include specific torque settings for fasteners and recommendations for bedding in the new clutch disc to ensure proper seating and performance ².

Maintenance and Troubleshooting

Maintaining the Cummins 4938325 Clutch Disc involves regular inspection for signs of wear or damage, such as uneven wear patterns or cracks in the friction materials. Addressing issues promptly can prevent more significant problems and ensure continued reliable operation. Troubleshooting common issues, such as slipping or difficulty engaging gears, may involve checking the alignment and condition of the clutch disc, pressure plate, and flywheel ².

Compatibility with Cummins Engines

The Clutch Disc part number 4938325, manufactured by Cummins, is designed to be compatible with several specific engine models. This part is integral to the clutch system, facilitating the smooth engagement and disengagement of the engine’s power transmission to the transmission.

For the 4B3.9 and 6B5.9 engines, the Clutch Disc 4938325 ensures efficient power transfer, maintaining the operational integrity of these engines. These engines, known for their robust performance, benefit from the precision engineering of this clutch disc, which helps in reducing wear and tear, thereby extending the engine’s lifespan.

In the case of the B5.9 GAS PLUS CM556 engine, the Clutch Disc 4938325 is equally crucial. This engine, which combines gas and diesel capabilities, relies on the clutch disc to manage the dual-fuel system’s demands effectively. The design of this part supports the engine’s unique operational requirements, ensuring seamless transitions between fuel types.

The compatibility of the Clutch Disc 4938325 across these engines underscores its versatility and the importance of using the correct part for each engine model. This ensures optimal performance and reliability in various operational conditions ².

Understanding the Role of Part 4938325 Clutch Disc in Engine Systems

Part 4938325, the Clutch Disc, is a component in the operation of the Clutch system, particularly in rear-wheel drive (RWD) configurations. Its primary function is to facilitate the transfer of power from the engine to the transmission, ensuring smooth and efficient gear changes.

Interaction with the Clutch System

The Clutch Disc is positioned between the Pressure Plate and the Flywheel. When the Clutch Pedal is depressed, the Pressure Plate releases its grip on the Clutch Disc, disconnecting the engine from the transmission. This allows for gear shifting without causing undue stress on the drivetrain components. Upon releasing the Clutch Pedal, the Pressure Plate re-engages, clamping the Clutch Disc between itself and the Flywheel, thereby re-establishing the power flow from the engine to the transmission ².

Role in Rear-Wheel Drive Systems

In RWD systems, the Clutch Disc plays a significant role in managing the power distribution to the rear wheels. The efficient engagement and disengagement of the Clutch Disc ensure that power is smoothly transferred to the rear axle, enhancing vehicle performance and drivability. The Clutch Disc must withstand significant friction and heat, making its material composition and design paramount for durability and performance ².

Integration with Transmission

The Clutch Disc works in concert with the transmission to provide seamless gear changes. As the Clutch Disc engages, it allows the transmission to shift gears without interruption in power delivery. This integration is vital for maintaining vehicle momentum and ensuring a responsive driving experience ².

Contribution to Overall Drivetrain Efficiency

By effectively managing the connection between the engine and transmission, the Clutch Disc contributes to the overall efficiency of the drivetrain. Its proper function ensures that power is transmitted with minimal loss, enhancing fuel efficiency and reducing wear on other drivetrain components ².

Conclusion

In summary, the Cummins 4938325 Clutch Disc is a fundamental component in the Clutch system, particularly in RWD configurations. Its role in facilitating smooth power transfer and efficient gear changes is indispensable for the optimal performance of engine systems. Proper installation, maintenance, and understanding of its role within the engine system are crucial for ensuring the longevity and reliability of this Cummins part.