3420640
Disc Spring
Cummins®

The Cummins 3420640 Disc Spring is a specialized component designed for use in commercial trucks. Its primary function is to provide consistent and reliable force within the truck’s mechanical systems. This part is integral to ensuring the smooth operation of various truck components, contributing to overall vehicle performance and durability.

Basic Concepts of Disc Springs

Disc springs, also known as Belleville washers, are conical-shaped mechanical components that function as springs. When compressed, they exert a force that increases non-linearly with the amount of compression. This unique characteristic makes them suitable for applications requiring precise force management. Disc springs are commonly used in various mechanical systems for their ability to handle high loads, provide consistent force, and operate in compact spaces ¹.

Purpose of the Cummins 3420640 Disc Spring

The Cummins 3420640 Disc Spring plays a role in the operation of commercial trucks by providing consistent force in critical applications. It is often used in clutch systems, where it helps maintain pressure on the clutch plates, ensuring smooth engagement and disengagement. Additionally, it can be found in braking systems, where it assists in maintaining consistent pressure on the brake components, contributing to reliable stopping power ².

Key Features

The Cummins 3420640 Disc Spring is characterized by its robust design and high-quality material composition. It is typically made from spring steel, which offers excellent durability and resistance to wear. The disc spring’s conical shape allows it to compress and expand efficiently, providing consistent force over its operational range. Its design also ensures it can operate effectively in the demanding environments typical of commercial truck applications.

Benefits of Using Disc Springs in Trucks

Disc springs offer several advantages in truck applications. They can handle high loads and provide consistent force, which is crucial for the reliable operation of clutch and brake systems. Their compact design allows them to fit into tight spaces, making them ideal for use in modern truck designs where space is at a premium. Additionally, disc springs are known for their durability and long service life, reducing the need for frequent replacements and maintenance ³.

Installation and Integration

Installing the Cummins 3420640 Disc Spring involves placing it within the appropriate system, such as the clutch or brake assembly. It is important to ensure that the disc spring is correctly aligned and seated to function effectively. Specific requirements may include torque settings for fasteners and ensuring that all mating surfaces are clean and free from debris. Following the manufacturer’s guidelines for installation will help ensure the disc spring operates as intended.

Troubleshooting Common Issues

Common issues with disc springs may include inconsistent force output, which can affect the performance of the clutch or brake system. This may be due to wear, improper installation, or contamination. Diagnosing these issues involves inspecting the disc spring for signs of wear or damage, ensuring it is correctly installed, and cleaning any contaminated surfaces. Replacing the disc spring if necessary can resolve these issues and restore system performance.

Maintenance Tips

To ensure the longevity and optimal performance of the Cummins 3420640 Disc Spring, regular inspection and maintenance are recommended. This includes checking for signs of wear or damage, ensuring it remains clean and free from contaminants, and verifying that it is correctly installed. Following these maintenance practices will help ensure the disc spring continues to function effectively throughout its service life.

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 spanning over a century, Cummins has established a strong reputation in the commercial truck industry for producing reliable and high-performance components. Their product range includes engines, powertrain components, and aftermarket parts, all designed to meet the demanding requirements of commercial truck applications.

Disc Spring Part 3420640 Compatibility with Cummins Engines

The Disc Spring part 3420640 is designed to fit seamlessly with several Cummins engine models. This part is essential for maintaining the integrity and performance of the engine’s components. Below is a detailed description of its compatibility with the listed engines:

• QSV81G, QSV91-G4 CM558/CM700 V102, QSV91G, QSW/QSV82, QSW27, QSW36, QSW73

  The Disc Spring part 3420640 is engineered to fit within the specified engine models, ensuring proper alignment and function. It is crucial for the operation of the engine’s internal mechanisms, providing stability and support to various components. This part is particularly important in maintaining the balance and efficiency of the engine, preventing wear and tear that could lead to performance issues.

  When installed correctly, the Disc Spring part 3420640 contributes to the smooth operation of the engine by absorbing shocks and vibrations, which helps in reducing the overall stress on the engine parts. This is especially vital in engines like the QSV81G and QSV91-G4 CM558/CM700 V102, which are known for their robust performance and reliability.

  Additionally, the compatibility of this part with the QSW series engines, including QSW/QSV82, QSW27, QSW36, and QSW73, ensures that these engines can operate efficiently without any disruptions caused by improper fitting or failure of the spring. The precision in the design of the Disc Spring part 3420640 guarantees that it will fit snugly and perform optimally across all the specified engine models.

  The importance of using the correct Disc Spring part 3420640 cannot be overstated, as it directly impacts the longevity and performance of the engine. Ensuring that this part is correctly installed is a critical step in maintaining the engine’s health and efficiency.

Role of Part 3420640 Disc Spring in Engine Systems

The part 3420640 Disc Spring is an integral component in various engine systems, contributing to the efficient operation and durability of these systems.

In the arrangement of engine components, the Disc Spring plays a significant role in maintaining the proper spacing and alignment between parts. This ensures that the components function harmoniously, reducing the risk of mechanical failure.

Within the turbocharger system, the Disc Spring is utilized to manage the pressure and tension within the turbocharger assembly. It helps in maintaining the optimal performance of the turbocharger by ensuring that the internal components are held in the correct position under varying operational conditions.

In the exhaust assembly, the Disc Spring is employed to absorb vibrations and shocks that occur during the engine’s operation. This not only prolongs the lifespan of the exhaust components but also enhances the overall efficiency of the exhaust system.

The exhaust assembly manifold benefits from the Disc Spring by ensuring a secure and stable connection between the manifold and the exhaust system. This connection is vital for the proper flow of exhaust gases and the reduction of emissions.

In the exhaust manifold, the Disc Spring assists in managing the thermal expansion that occurs due to the high temperatures of the exhaust gases. This helps in maintaining the integrity of the manifold and preventing leaks.

The exhaust manifold manifold setup, which involves multiple manifolds, relies on the Disc Spring to maintain consistent pressure and alignment across all manifolds. This ensures uniform performance and reduces the likelihood of uneven wear.

The manifold itself, whether intake or exhaust, utilizes the Disc Spring to secure the connections to the engine block. This is essential for maintaining the seal and ensuring that the airflow or exhaust flow is directed correctly.

In the exhaust system, the Disc Spring is used in various joints and connections to absorb the dynamic forces generated during engine operation. This contributes to the stability and longevity of the exhaust components.

The multiduct assembly connection and multiduct connection systems incorporate the Disc Spring to manage the complex interactions between multiple ducts. This ensures that the airflow is distributed evenly and efficiently throughout the engine system.

Finally, in the turbocharger L6 assembly and turbocharger L8 assembly, the Disc Spring is crucial for maintaining the precise alignment and tension of the turbocharger components. This ensures that the turbocharger operates at peak efficiency, contributing to the overall performance of the engine.

Conclusion

The Cummins 3420640 Disc Spring is a vital component in the operation of commercial trucks, providing consistent force in critical applications such as clutch and brake systems. Its robust design, high-quality material composition, and compatibility with various Cummins engine models make it an essential part for maintaining the performance and durability of truck engines. Regular maintenance and proper installation are key to ensuring the longevity and optimal performance of this part.