3976444
Plain Washer
Cummins®

The Cummins 3976444 Plain Washer is a component designed for use in commercial truck applications. Its role is to maintain the integrity of truck components by ensuring secure fastening and proper load distribution. This washer is integral to the functionality and durability of various truck systems, contributing to the overall efficiency and reliability of commercial vehicles ¹.

Basic Concepts of Plain Washers

Plain washers are simple yet vital components in mechanical systems. They serve multiple functions, including providing a smooth bearing surface between a fastener and the material being fastened, distributing loads more evenly, and preventing damage to surfaces ². In addition, plain washers can help to reduce friction and wear on fasteners, thereby enhancing the stability and efficiency of the components they are used with.

Purpose of the Cummins 3976444 Plain Washer

The Cummins 3976444 Plain Washer is specifically designed to play a role in the fastening systems of commercial trucks. It contributes to the secure attachment of components by distributing the load of fasteners more evenly across surfaces. This helps to prevent damage to the materials being joined and ensures that the fastening system remains robust under the stresses encountered in heavy-duty applications ³.

Key Features

The Cummins 3976444 Plain Washer is characterized by several key features that enhance its performance and durability. These include its material composition, which is selected for strength and resistance to wear and corrosion, and its precise dimensions, which ensure a proper fit within fastening systems. The design of the washer also incorporates features that maximize its effectiveness in distributing loads and providing a stable bearing surface.

Benefits

Using the Cummins 3976444 Plain Washer offers several benefits. It contributes to improved fastening security by ensuring that fasteners are evenly distributed and tightly held. The washer’s resistance to wear and corrosion helps to prolong the lifespan of both the washer itself and the components it is used with. Additionally, by providing a stable and smooth bearing surface, the washer plays a role in the longevity and reliability of truck components.

Installation Guidelines

Proper installation of the Cummins 3976444 Plain Washer is key to ensuring its optimal performance and longevity. It should be placed under the head of a bolt or nut to distribute the load evenly and protect the surface from damage. Care should be taken to ensure that the washer is correctly aligned and not over-tightened, as this can lead to deformation or failure. Following manufacturer guidelines for torque specifications is recommended to achieve the best results.

Troubleshooting and Maintenance

Common issues with plain washers include wear, corrosion, and improper installation. Regular inspection for signs of damage or deformation can help identify problems early. Maintenance practices such as cleaning and lubricating the washer and its associated components can prolong their lifespan. Replacing worn or damaged washers promptly is also important to maintain the integrity of the fastening system.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration, and emission solutions. With a strong reputation in the commercial truck industry, Cummins is known for its commitment to quality, innovation, and customer satisfaction. The company’s extensive product range and focus on reliability make it a preferred choice for components like the 3976444 Plain Washer.

Cummins Engine Part 3976444: Plain Washer Compatibility

The Cummins part 3976444, a Plain Washer, is a versatile component that fits into various engine configurations. This washer is designed to provide a smooth and secure fit, ensuring proper alignment and function within the engine assembly. Below is a detailed description of the engines with which this part is compatible:

Cummins 6B5.9 and 6C8.3 Engines

The Plain Washer 3976444 is compatible with the Cummins 6B5.9 and 6C8.3 engines. These engines are known for their robust performance and reliability, often used in heavy-duty applications. The washer ensures that the components are properly aligned and secured, contributing to the overall efficiency and longevity of the engine.

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

For the B5.9 GAS PLUS CM556 and ISB5.9 CM2880 B127 engines, the Plain Washer 3976444 is essential for maintaining the integrity of the engine’s assembly. These engines are designed for high-performance applications, and the washer plays a crucial role in ensuring that all parts are correctly positioned and fastened.

Cummins ISL9 CM2150 SN, ISL9.5 CM2880 L138, and QSL9 CM850 (CM2850) Engines

The Plain Washer 3976444 is also compatible with the ISL9 CM2150 SN, ISL9.5 CM2880 L138, and QSL9 CM850 (CM2850) engines. These engines are known for their durability and efficiency, often used in a variety of industrial and commercial applications. The washer ensures that the engine components are properly aligned and secured, contributing to the engine’s overall performance and reliability.

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

The Plain Washer 3976444 fits into the L8.9, L8.9 CM2670 L134C, and L9 CM2670 L128B engines. These engines are designed for high-performance and reliability, often used in heavy-duty applications. The washer ensures that the components are properly aligned and secured, contributing to the engine’s overall efficiency and longevity.

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

Lastly, the Plain Washer 3976444 is compatible with the QSC8.3 CM2880 C102 and QSL8.9 CM2150 L141 engines. These engines are known for their robust performance and reliability, often used in a variety of industrial and commercial applications. The washer ensures that the engine components are properly aligned and secured, contributing to the engine’s overall performance and reliability.

Role of Part 3976444 Plain Washer in Engine Systems

The part 3976444 Plain Washer is an essential component in various engine systems, ensuring smooth operation and efficient performance.

In accessories, the Plain Washer is used to maintain proper spacing and alignment between components, reducing friction and wear. This is particularly important in systems where accessories are driven by belts or chains, as it helps in maintaining the correct tension and alignment.

For electric starting systems, the Plain Washer plays a role in the assembly of the starter motor. It ensures that the motor components are correctly spaced, which is vital for the reliable engagement of the starter gear with the flywheel.

In aid and air heater starting systems, the Plain Washer is utilized to secure and space components within the starting mechanism. This ensures that the air heater can function effectively, providing the necessary warmth to the engine for cold starts.

The belt tensioner bracket relies on the Plain Washer to maintain the correct tension on the belt. This is important for the efficient transfer of power from the engine to the accessories it drives, such as the alternator and water pump.

In compressor and refrigerant systems, the Plain Washer is used in the mounting and connection points. It ensures that the compressor is securely attached and aligned, which is essential for the efficient compression and circulation of refrigerant.

For connection points in the air intake system, the Plain Washer helps in securing and spacing the components. This ensures a proper seal and alignment, which is important for the efficient flow of air into the engine.

In drive systems, particularly those involving the refrigerant compressor, the Plain Washer is used to maintain the correct spacing and alignment of the drive components. This ensures efficient power transfer and reduces the risk of component wear.

The idler pulley in various engine systems also benefits from the use of the Plain Washer. It ensures that the pulley is correctly spaced and aligned, which is important for the smooth operation of belt-driven systems.

For mounting the refrigerant compressor, the Plain Washer is used to ensure that the compressor is securely attached and aligned. This is important for the efficient operation of the refrigerant system and the overall cooling performance of the engine.

Lastly, in vibration isolator systems, the Plain Washer is used to maintain the correct spacing and alignment of components. This helps in effectively isolating vibrations, which is important for the smooth and reliable operation of the engine.

Conclusion

The Cummins 3976444 Plain Washer is a critical component in the maintenance and operation of commercial truck engines. Its role in ensuring secure fastening, proper load distribution, and the prevention of surface damage is essential for the durability and efficiency of truck systems. Proper installation, regular maintenance, and prompt replacement of worn washers are key practices to ensure the longevity and reliability of the fastening systems in which this part is used.