3967109
Plain Washer
Cummins®

The Cummins 3967109 Plain Washer is a component designed for use in commercial trucks, playing a supportive role in various mechanical systems. Plain washers, in general, are fundamental elements in mechanical assemblies, providing functions that contribute to the overall efficiency and reliability of machinery ¹.

Basic Concepts of Plain Washers

Plain washers are flat, annular objects placed under a nut or bolt head to distribute the load over a larger area, preventing surface damage. They can also act as spacers, provide a bearing surface, and help maintain proper alignment. Materials commonly used include steel, stainless steel, brass, and nylon, each offering different properties such as strength, corrosion resistance, and electrical insulation ².

Purpose of the Cummins 3967109 Plain Washer

In commercial trucks, the 3967109 Plain Washer enhances the operation of truck components by ensuring even load distribution, preventing surface damage, and maintaining the integrity of bolted connections. Its role is integral to the functionality and efficiency of the truck’s mechanical assemblies, contributing to the overall performance and longevity of the vehicle ³.

Key Features

The 3967109 Plain Washer is characterized by its precise design and dimensions, tailored to meet the demanding requirements of commercial truck applications. Its specific thickness, outer diameter, and inner diameter are optimized for its intended use, ensuring reliable performance under various operating conditions ⁴.

Benefits

Utilizing the 3967109 Plain Washer in truck maintenance and operation offers several advantages. Its design contributes to durability, ensuring it can withstand the rigors of commercial truck use. The washer aids in load distribution, reducing the risk of surface damage and component failure. Additionally, it exhibits resistance to wear and corrosion, enhancing its longevity and reliability in demanding environments ⁵.

Installation and Usage

Proper installation of the 3967109 Plain Washer is crucial for its effective function within a truck’s mechanical system. It should be placed under the bolt or nut to ensure even load distribution and surface protection. Common applications for this washer include use in engine components, transmission systems, and chassis assemblies, where it supports the integrity and performance of bolted connections ⁶.

Troubleshooting and Maintenance

Identifying issues related to the 3967109 Plain Washer involves checking for signs of wear, corrosion, or deformation. Regular maintenance, such as inspection and replacement when necessary, can ensure the washer’s optimal performance and longevity. Replacement might be considered if the washer shows significant wear or if it no longer effectively distributes load or maintains alignment ⁷.

Cummins: Manufacturer Overview

Cummins is a renowned manufacturer in the automotive and heavy-duty truck industry, known for its commitment to quality and innovation. With a rich history and a diverse range of products, Cummins has established a reputation for producing reliable and high-performance components. Their dedication to excellence is evident in the design and manufacturing of components like the 3967109 Plain Washer, ensuring they meet the stringent demands of commercial truck applications ⁸.

Cummins Engine Part 3967109: Plain Washer Application

The Cummins part number 3967109, a Plain Washer, is a critical component that ensures proper sealing and alignment in various Cummins engine models. This washer is designed to fit seamlessly within the engine’s assembly, providing a reliable interface between different parts. Below is a detailed description of how this part integrates with the specified Cummins engines:

4B3.9, 6B5.9, 6C8.3, B6.7, L8.9, L8.9 CM2670 L134C

The Plain Washer 3967109 is utilized in the 4B3.9, 6B5.9, 6C8.3, B6.7, L8.9, and L8.9 CM2670 L134C engines. These engines, known for their robust performance and reliability, incorporate the washer to maintain the integrity of the engine’s sealing and alignment. The washer’s role is crucial in preventing leaks and ensuring that the engine components operate smoothly ⁹.

ISB3.9 CM2220 B107, ISB5.9 CM2880 B127, ISL9 CM2150 SN, ISL9.5 CM2880 L138, ISZ13 CM2150 Z105

In the ISB3.9 CM2220 B107, ISB5.9 CM2880 B127, ISL9 CM2150 SN, ISL9.5 CM2880 L138, and ISZ13 CM2150 Z105 engines, the Plain Washer 3967109 is employed to maintain the precision required for these high-performance engines. These engines are designed for demanding applications, and the washer’s function is vital in ensuring that the engine’s components remain securely fastened and properly aligned ¹⁰.

QSB7 CM2880 B117, QSC8.3 CM2880 C102, QSL8.9 CM2150 L141, QSL9 CM850 (CM2850)

The Plain Washer 3967109 is also integral to the QSB7 CM2880 B117, QSC8.3 CM2880 C102, QSL8.9 CM2150 L141, and QSL9 CM850 (CM2850) engines. These engines are engineered for heavy-duty applications, and the washer’s role in maintaining the engine’s structural integrity is paramount. It ensures that the engine operates efficiently and reliably under strenuous conditions ¹¹.

Z14 CM2670 Z103B

Lastly, the Plain Washer 3967109 is used in the Z14 CM2670 Z103B engine. This engine, like the others, relies on the washer to maintain proper alignment and sealing, ensuring that the engine performs optimally and lasts longer. The washer’s precision fit is essential for the engine’s overall functionality and durability ¹².

Role of Part 3967109 Plain Washer in Engine Systems

The 3967109 Plain Washer is a versatile component that enhances the performance and longevity of various engine systems by providing necessary friction reduction, secure mounting, and reliable sealing. In accessories, this washer ensures secure attachment and reduces friction between moving parts, enhancing durability and reliability. For electric starting systems, it plays a part in maintaining consistent electrical connections, which is vital for reliable engine start-ups.

In the arrangement of heat shields, the 3967109 Plain Washer helps in securing the shields in place, ensuring they effectively protect nearby components from excessive heat. Within connection points, such as those found in exhaust outlets, it prevents leaks and maintains the integrity of the exhaust system.

For control mechanisms like the manual throttle lever, this washer ensures smooth operation by reducing wear and tear on the lever components. In drive systems, particularly those involving refrigerant compressors and engine fans, it aids in maintaining efficient power transmission while minimizing friction.

The flywheel housing and housing components benefit from the washer by ensuring that the flywheel and other housed components operate without undue stress or wear. In mounting applications, such as those for refrigerant compressors, the washer provides a stable and friction-reduced interface, contributing to the overall stability of the engine system.

Plumbing systems, including those for exhaust recirculation air and water pumps, utilize the 3967109 Plain Washer to ensure tight seals and efficient fluid dynamics. Water pumps, in particular, rely on this component to maintain consistent performance and prevent leaks.

Shields, whether for heat or other purposes, are securely held in place with the help of this washer, ensuring they perform their protective functions effectively. In valve and fuel shutoff systems, the washer ensures smooth operation and reliable sealing, which is essential for the safe and efficient functioning of the engine ¹³.

Conclusion

The Cummins 3967109 Plain Washer is a critical component in the maintenance and operation of commercial trucks and various engine systems. Its precise design, durability, and versatile applications make it essential for ensuring the reliability and efficiency of mechanical assemblies. Regular maintenance and proper installation are key to maximizing the benefits of this component.