4387101
Lock Washer
Cummins®

The Cummins 4387101 Lock Washer is a specialized component designed to enhance fastening systems in commercial trucks. Its purpose is to provide additional security to bolted connections, ensuring they remain tight under various operating conditions. This part plays a role in maintaining the integrity of truck components, contributing to the overall reliability and safety of commercial vehicle operations ¹.

Basic Concepts of Lock Washers

Lock washers are designed to prevent fastened components from loosening due to vibration or other dynamic forces. Unlike regular washers, which primarily distribute load and protect surfaces, lock washers incorporate features such as split sections or serrated edges. These features create additional friction or bite into the mating surfaces, thereby enhancing the security of the fastening system ².

Purpose of the 4387101 Lock Washer

The Cummins 4387101 Lock Washer is specifically engineered to address the challenges posed by the demanding environments of commercial trucks. It provides extra resistance to loosening, which is particularly important in applications where vibrations are common. By ensuring that bolted connections remain secure, this lock washer contributes to the longevity and reliability of truck components ³.

Key Features

The Cummins 4387101 Lock Washer is characterized by several key features that set it apart from standard lock washers. It is typically made from high-strength materials to withstand the rigors of commercial truck use. The design includes split sections or serrated edges that create a locking mechanism, enhancing the security of the fastening system. Additionally, it may feature a unique profile that allows it to conform to various surfaces, ensuring a tight and secure fit.

Benefits

Using the Cummins 4387101 Lock Washer offers several advantages. Its design provides improved vibration resistance, which is crucial in the dynamic environment of a commercial truck. The enhanced fastening security ensures that components remain tightly connected, reducing the risk of failure. Furthermore, the durable material composition allows it to withstand harsh operating conditions, contributing to its longevity and reliability.

Installation Guidelines

To ensure optimal performance and durability, the Cummins 4387101 Lock Washer should be installed according to specific guidelines. Begin by cleaning the mating surfaces to remove any debris or corrosion. Place the lock washer under the bolt head or nut, ensuring that the split section or serrated edges are properly aligned with the surfaces. Tighten the bolt or nut to the manufacturer’s specified torque, taking care not to over-tighten, which could damage the lock washer or the components being fastened.

Troubleshooting and Maintenance

Common issues with lock washers include deformation or failure due to excessive vibration or improper installation. To identify problems, regularly inspect the lock washers for signs of wear or damage. Maintenance tips include replacing lock washers at scheduled intervals or whenever signs of wear are detected. Additionally, ensuring that all fastening components are properly torqued and that surfaces are clean will help prolong the life of the lock washer.

Compatibility and Applications

The Cummins 4387101 Lock Washer is designed for use in various commercial truck systems. It is commonly applied in assemblies where vibration resistance and secure fastening are paramount. Specific components or assemblies it is designed to work with may include engine mounts, suspension systems, and other critical fastening points within the truck.

Cummins Corporation Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration, and related technologies. With a history spanning over a century, Cummins has established a reputation for quality, reliability, and innovation in the commercial truck industry. The company’s extensive product range and commitment to customer satisfaction make it a trusted name among fleet operators and maintenance professionals.

Lock Washer 4387101 in Cummins Engines

The Lock Washer 4387101, manufactured by Cummins, is a critical component in ensuring the integrity and reliability of various engine systems. This part is designed to prevent loosening of fasteners due to vibration or other dynamic forces, thereby maintaining the structural and operational integrity of the engine.

Application in Cummins Engines

• QSK50: The Lock Washer 4387101 is integral in the QSK50 engine, where it is used in several critical assemblies to secure bolts and nuts. Its role is vital in maintaining the alignment and tension of components, ensuring that the engine operates smoothly and efficiently.

• CM2150: In the CM2150 engine, this lock washer is employed in various applications to secure fasteners in high-stress areas. Its use helps in maintaining the stability of engine mounts, brackets, and other critical components, contributing to the overall durability and performance of the engine.

• MCRS: The MCRS engine also benefits from the Lock Washer 4387101. This part is used in several key locations to ensure that fasteners remain tight and secure, which is crucial for the engine’s operational safety and longevity.

Grouping of Engines

The Lock Washer 4387101 is a versatile component that finds application across different Cummins engines, including the QSK50, CM2150, and MCRS. Its role in securing fasteners is essential in maintaining the structural integrity and operational efficiency of these engines. The use of this lock washer in these engines underscores its importance in ensuring that critical components remain securely fastened, thereby enhancing the overall reliability and performance of the engine systems.

Role of Part 4387101 Lock Washer in Engine Systems

In the context of engine systems, the 4387101 Lock Washer is instrumental in ensuring the secure attachment of various components, thereby maintaining the integrity and efficiency of the engine’s operation.

Aftertreatment Device

Within the aftertreatment device, the 4387101 Lock Washer is utilized to secure bolts and fasteners that hold the device in place. This ensures that the aftertreatment device remains firmly attached to the exhaust system, allowing for effective filtration of emissions and compliance with environmental regulations.

Arrangement

In the arrangement of engine components, the 4387101 Lock Washer plays a key role in preventing loosening of fasteners due to vibrations. This is particularly important in maintaining the precise alignment and spacing of components, which is essential for optimal engine performance and longevity.

Pressure Regulator Valve

For the pressure regulator valve, the 4387101 Lock Washer is employed to secure the valve housing to the engine block or manifold. This ensures that the valve operates within specified pressure ranges, contributing to stable fuel delivery and efficient combustion.

Rain Cap

On the rain cap, the 4387101 Lock Washer is used to secure the cap to the top of the fuel tank or other components exposed to the elements. This prevents water ingress and contamination, protecting sensitive engine components from moisture damage.

Overall, the 4387101 Lock Washer is a fundamental component in securing various engine system parts, ensuring they remain in place under operational conditions and contributing to the reliable performance of the engine.

Conclusion

The Cummins 4387101 Lock Washer is a critical component in the fastening systems of commercial trucks and Cummins engines. Its design and features enhance the security of bolted connections, ensuring that components remain tightly connected under various operating conditions. By understanding its purpose, key features, benefits, and proper installation guidelines, fleet operators and maintenance professionals can ensure the longevity and reliability of their vehicles and engine systems.