3979430
Regular Hexagon Nut
Cummins®

The Cummins 3979430 Regular Hex Nut is a specialized fastener designed for use in heavy-duty truck components. Its purpose is to provide secure fastening in various applications within the truck’s mechanical systems. The significance of this nut lies in its ability to ensure the integrity and reliability of the connections it forms, contributing to the overall performance and durability of the truck.

Basic Concepts of Regular Hex Nuts

A regular hex nut is a type of fastener characterized by its hexagonal shape, which allows for efficient tightening and loosening using a wrench. In mechanical systems, hex nuts are commonly used to secure bolts and other threaded components. They function by creating a strong, stable connection that resists loosening due to vibrations and other dynamic forces ¹.

Purpose of the Cummins 3979430 Regular Hex Nut

The Cummins 3979430 Regular Hex Nut plays a specific role in the operation of a truck by securing critical components in place. Its application areas include engine assemblies, transmission systems, and chassis components. The functional importance of this nut is evident in its ability to maintain secure fastenings under the demanding conditions experienced by heavy-duty trucks ².

Key Features

The Cummins 3979430 Regular Hex Nut is distinguished by several key features that enhance its performance and durability. These include a material composition designed to withstand high stress and corrosion, a precise thread size that ensures a snug fit with corresponding bolts, and unique design elements such as a locking mechanism to prevent loosening. These features contribute to the nut’s reliability and longevity in heavy-duty applications.

Benefits

Using the Cummins 3979430 Regular Hex Nut offers several benefits. It provides improved reliability by ensuring secure fastenings that resist loosening over time. The nut’s design allows for ease of installation, reducing the time and effort required during maintenance procedures. Additionally, its durable construction contributes to long-term performance, minimizing the need for frequent replacements.

Installation Process

Proper installation of the Cummins 3979430 Regular Hex Nut involves several steps to ensure secure fastening. Begin by selecting the appropriate wrench size for the nut’s hexagonal shape. Using a torque wrench, tighten the nut to the manufacturer’s specified torque settings to avoid over-tightening or under-tightening. It is also important to periodically check the fastening to ensure it remains secure, especially after initial installation ³.

Troubleshooting Common Issues

Common problems associated with regular hex nuts include loosening due to vibrations and corrosion from exposure to the elements. To address loosening, ensure that the nut is properly torqued during installation and consider using a locking compound to enhance security. Corrosion can be mitigated by applying a protective coating to the nut and regularly inspecting it for signs of damage or wear.

Maintenance Tips

To maintain the Cummins 3979430 Regular Hex Nut, perform periodic checks to ensure it remains securely fastened. Clean the nut and surrounding areas to remove dirt and debris that could contribute to corrosion. If signs of wear or damage are detected, consider replacement to prevent potential failures. Regular maintenance will help extend the life of the nut and ensure continued reliable performance.

Compatibility and Applications

The Cummins 3979430 Regular Hex Nut is designed for use in various applications within heavy-duty trucks. It is compatible with a range of systems, including engine assemblies, transmission components, and chassis structures. Its versatility makes it a valuable fastener for maintaining the integrity of critical connections in these demanding environments.

Cummins Engine Compatibility with Regular Hex Nut Part 3979430

The Regular Hex Nut part number 3979430, manufactured by Cummins, is a versatile component that fits into various engine configurations. This part is designed to provide a secure fastening solution in multiple engine models, ensuring reliable performance and durability.

Cummins 6B5.9 and 6C8.3 Engines

The Regular Hex Nut part 3979430 is compatible with the Cummins 6B5.9 and 6C8.3 engines. These engines are known for their robust design and efficiency, making them suitable for heavy-duty applications. The hex nut is used in various parts of the engine assembly, ensuring that components are tightly secured and properly aligned.

Cummins B5.9 GAS PLUS CM556 and ISB5.9 CM2880 B127 Engines

For the Cummins B5.9 GAS PLUS CM556 and ISB5.9 CM2880 B127 engines, the part 3979430 is integral to maintaining the integrity of the engine’s structure. This hex nut is used in several critical areas, including the cylinder head and engine block, where it helps to keep bolts and other fasteners in place under high stress conditions.

Cummins ISL9 CM2150 SN and ISL9.5 CM2880 L138 Engines

In the Cummins ISL9 CM2150 SN and ISL9.5 CM2880 L138 engines, the Regular Hex Nut part 3979430 is employed in various fastening applications. These engines are designed for on-highway and vocational use, and the hex nut ensures that all components are securely fastened, contributing to the engine’s overall reliability and longevity.

Cummins L8.9, L8.9 CM2670 L134C, and L9 CM2670 L128B Engines

The part 3979430 is also compatible with the Cummins L8.9, L8.9 CM2670 L134C, and L9 CM2670 L128B engines. These engines are known for their versatility and are used in a wide range of applications, from construction to agricultural machinery. The hex nut is used in various parts of these engines, ensuring that all components are securely fastened and properly aligned.

Cummins QSC8.3 CM2880 C102 and QSL8.9 CM2150 L141 Engines

For the Cummins QSC8.3 CM2880 C102 and QSL8.9 CM2150 L141 engines, the Regular Hex Nut part 3979430 is used in several critical fastening applications. These engines are designed for heavy-duty applications and require reliable fastening solutions to maintain performance and durability. The hex nut ensures that all components are securely fastened, contributing to the engine’s overall reliability.

Cummins QSL9 CM850 (CM2850) Engine

The Cummins QSL9 CM850 (CM2850) engine also utilizes the Regular Hex Nut part 3979430 in various fastening applications. This engine is designed for heavy-duty applications and requires reliable fastening solutions to maintain performance and durability. The hex nut ensures that all components are securely fastened, contributing to the engine’s overall reliability.

Role of Part 3979430 Regular Hex Nut in Engine Systems

The part 3979430 Regular Hex Nut is an essential component in various engine systems, ensuring the secure attachment and proper functioning of several key elements.

In the Belt Tensioner Bracket system, this hex nut plays a significant role in maintaining the correct tension of the drive belt. It secures the bracket to the engine block or other mounting points, ensuring that the tensioner operates within specified parameters. This, in turn, guarantees efficient power transmission from the engine to auxiliary components such as the alternator, water pump, and air conditioning compressor.

Within the Compressor and Refrigerant Compressor systems, the hex nut is utilized to fasten the compressor to its mounting points. This secure attachment is vital for the stable operation of the compressor, which is responsible for pressurizing the refrigerant and facilitating the cooling process in the air conditioning system. Proper mounting ensures that the compressor can withstand the operational stresses and vibrations without loosening, which could lead to inefficiencies or failures.

In the Drive system, particularly where an Idler Pulley is employed, the hex nut is used to secure the pulley to its bracket or the engine block. The idler pulley maintains the proper alignment and tension of the drive belt, which is crucial for the efficient operation of engine accessories. The hex nut ensures that the pulley remains firmly in place, preventing any slippage or misalignment that could affect the performance of the driven components.

Lastly, in the context of Mounting systems for various engine components, the hex nut is a common fastener used to secure parts to the engine block or other structural elements. Whether it is attaching a refrigerant compressor, an idler pulley, or other accessories, the hex nut provides a reliable and robust connection. This ensures that the components remain in their intended positions, operating efficiently and contributing to the overall performance and reliability of the engine system.

Conclusion

The Cummins 3979430 Regular Hex Nut is a critical component in the maintenance and operation of heavy-duty trucks. Its design and features ensure secure fastenings in demanding environments, contributing to the reliability and durability of the truck’s mechanical systems. Proper installation, maintenance, and understanding of its applications are essential for maximizing the performance and longevity of this part.