3900245
Plain Washer
Cummins®

The Cummins 3900245 Plain Washer is a component designed for use in commercial truck maintenance and operation. This washer serves a specific function within the mechanical systems of trucks, contributing to the overall efficiency and reliability of the vehicle. Understanding its purpose and significance can aid in maintaining the optimal performance of commercial trucks.

Basic Concepts of Plain Washers

Plain washers are simple yet vital components in mechanical systems. They are typically flat, annular metal rings that are placed under bolt heads or nuts. Their general function is to distribute the load of the fastener more evenly across the surface it is securing, thereby preventing damage to the material and ensuring a tighter, more secure fit. Plain washers also play a role in reducing friction and wear between moving parts, enhancing the integrity and performance of various components ¹.

Purpose of the Cummins 3900245 Plain Washer

The Cummins 3900245 Plain Washer is specifically designed to serve within the fastening systems of commercial trucks. It aids in the even distribution of load from bolts and nuts, which is crucial for maintaining the structural integrity of truck components. By providing a uniform surface for the fastener to press against, this washer helps in achieving a secure and stable connection, which is particularly important in the high-stress environments typical of commercial truck operations ².

Key Features

The Cummins 3900245 Plain Washer is characterized by several key features that enhance its performance and durability. It is typically made from high-quality steel, which provides the necessary strength and resilience for heavy-duty applications. The dimensions of the washer are precisely engineered to fit specific applications, ensuring optimal performance. Additionally, its design includes features that reduce the risk of corrosion and wear, contributing to its longevity in demanding conditions ³.

Benefits of Using Cummins 3900245 Plain Washer

Utilizing the Cummins 3900245 Plain Washer offers several benefits. It improves the security of fastenings by ensuring a more even distribution of load, which can prevent loosening over time. Its resistance to wear and corrosion enhances the durability of the washer, reducing the need for frequent replacements. Overall, the use of this washer contributes to the longevity and reliability of truck components, supporting efficient and safe operation ⁴.

Installation Guidelines

Proper installation of the Cummins 3900245 Plain Washer is crucial for its optimal performance. It should be placed under the head of a bolt or the nut, ensuring it is correctly aligned with the fastener. Care should be taken to avoid over-tightening, which can lead to damage. Following manufacturer guidelines for torque specifications is recommended to ensure the washer and fastener operate within their designed parameters ¹.

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 tips include keeping the washer and surrounding areas clean and free of debris, which can contribute to wear. Replacing worn or damaged washers promptly can prevent further issues and ensure the continued reliability of the fastening system ².

Compatibility and Applications

The Cummins 3900245 Plain Washer is designed for use in specific applications within commercial truck systems. It is compatible with a range of components, contributing to the secure fastening of parts under high stress and load conditions. Understanding its applications and compatibility can aid in selecting the appropriate washer for specific truck maintenance tasks ³.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and quality, Cummins has established a strong reputation in the commercial truck industry. The company’s product range includes a variety of components designed to enhance the performance, efficiency, and reliability of commercial vehicles ⁴.

Cummins Engine Part 3900245: Plain Washer Compatibility

The Cummins part number 3900245, a Plain Washer, is a versatile component that fits into various Cummins engine models. This washer is essential for ensuring proper sealing and alignment in numerous engine assemblies. Below is a detailed overview of the engines with which this part is compatible:

4B3.9 and 6B5.9 Engines

The Plain Washer 3900245 is compatible with the 4B3.9 and 6B5.9 engines. These engines are known for their robust performance and reliability, often used in heavy-duty applications. The washer plays a role in maintaining the integrity of the engine’s sealing and alignment.

B3.9 G, B4.5, B5.9 CM2670 B166C, B5.9 G, B5.9 GAS PLUS CM556, B6.7S, G5.9, G5.9 CM558

The Plain Washer 3900245 is also suitable for the B3.9 G, B4.5, B5.9 CM2670 B166C, B5.9 G, B5.9 GAS PLUS CM556, B6.7S, G5.9, and G5.9 CM558 engines. These engines vary in displacement and configuration but share common design elements that benefit from the use of this washer. It ensures that various components are properly aligned and sealed, contributing to the engine’s overall efficiency and longevity.

ISB3.9 CM2220 B107, ISB5.9 CM2880 B127, ISB5.9G CM2180

The ISB3.9 CM2220 B107, ISB5.9 CM2880 B127, and ISB5.9G CM2180 engines are part of Cummins’ Intelligent Systems for Better Performance (ISB) series. The Plain Washer 3900245 is integral to these engines, providing necessary support and alignment in various assemblies. Its use in these engines helps maintain optimal performance and reliability.

QSB3.9 30 CM550, QSB3.9 CM2880 B138, QSB5.9 30 CM550, QSB5.9 CM2880 B139, QSB5.9 CM550, QSB5.9G

The QSB3.9 30 CM550, QSB3.9 CM2880 B138, QSB5.9 30 CM550, QSB5.9 CM2880 B139, QSB5.9 CM550, and QSB5.9G engines are part of Cummins’ Quantum Series. The Plain Washer 3900245 is compatible with these engines, ensuring that critical components are properly aligned and sealed. This compatibility is essential for maintaining the high performance and durability that these engines are known for.

Role of Part 3900245 Plain Washer in Engine Systems

In engine systems, the part 3900245 Plain Washer is instrumental in ensuring the smooth operation and longevity of various components. Its primary function is to provide a bearing surface that reduces friction and wear between moving parts.

Lever and Rocker Mechanisms

In lever and rocker mechanisms, the Plain Washer is positioned between the lever and its pivot point. This placement ensures that the lever can move with minimal resistance, which is essential for the precise operation of these components. The washer helps in distributing the load evenly, preventing undue stress on the lever and its pivot.

Rocker Lever and Rocker Lever Support

For rocker levers and their supports, the Plain Washer plays a significant role in maintaining the integrity of the system. It is placed between the rocker lever and its support structure. This arrangement allows the rocker lever to oscillate without causing excessive wear on the support. The washer also helps in dampening vibrations, which can otherwise lead to premature failure of the rocker lever system.

Rocker Levers

In the context of rocker levers, the Plain Washer is used to facilitate smooth rotational movement. It is typically found at the point where the rocker lever contacts its pivot or fulcrum. By providing a low-friction interface, the washer ensures that the rocker lever can operate efficiently, reducing the likelihood of binding or sticking. This is particularly important in high-cycle applications where consistent performance is required.

Conclusion

The Cummins 3900245 Plain Washer is a small yet vital component in engine systems, contributing to the reliable and efficient operation of levers, rockers, and their associated mechanisms. Its role in reducing friction, distributing load evenly, and dampening vibrations underscores its importance in maintaining the performance and longevity of commercial truck engines.