4988940
Plain Washer
Cummins®

Introduction

The Cummins 4988940 Plain Washer is a component designed for use in commercial truck operations. It serves a specific function within the mechanical systems of trucks, contributing to the efficient and reliable performance of various truck components. Understanding its purpose and role is fundamental for maintaining and optimizing truck operations.

Basic Concepts of Plain Washers

Plain washers are simple yet vital components in mechanical systems. They are typically flat, annular devices made from metal or other materials. Their general function is to distribute loads, prevent damage to surfaces, and reduce friction between moving parts. Plain washers operate by providing a barrier between components, ensuring smooth operation and longevity of the parts they support ¹.

Purpose of the Cummins 4988940 Plain Washer

The Cummins 4988940 Plain Washer plays a role in the operation of a truck by providing support and stability in various applications. It is used in conjunction with bolts and nuts to distribute the load more evenly across surfaces, preventing damage and ensuring secure fastening. This washer is applied in different truck components, including engine mounts, transmission systems, and chassis assemblies, where it helps maintain the integrity and performance of these critical areas.

Key Features

The Cummins 4988940 Plain Washer is characterized by several key features that make it suitable for heavy-duty applications. It is typically made from high-strength materials, ensuring durability under demanding conditions. Its dimensions are precisely engineered to fit specific applications, and its design includes features that enhance its performance in load distribution and vibration reduction.

Benefits of Using Plain Washers

Incorporating plain washers like the Cummins 4988940 into truck assemblies offers several advantages. These include improved load distribution, which helps prevent surface damage and extends the life of components. Plain washers also contribute to vibration reduction, enhancing the smoothness of operation. Additionally, their design can provide corrosion resistance, protecting against environmental factors that could compromise truck performance ².

Installation and Usage Guidelines

Proper installation of the Cummins 4988940 Plain Washer is crucial for its effective function. It should be placed under the head of a bolt or nut to ensure even load distribution. Best practices include using the correct size washer for the application and ensuring it is properly aligned. Common applications within truck maintenance include engine component fastening, transmission system assembly, and chassis part connections.

Troubleshooting and Maintenance

Identifying common issues with plain washers, such as wear and tear or improper installation, is important for maintaining truck performance. Regular inspection for signs of damage or corrosion can help prevent failures. Maintenance practices include replacing worn washers and ensuring all components are correctly installed to maintain the washer’s effectiveness and longevity.

Role in Truck Performance

The Cummins 4988940 Plain Washer contributes to the overall performance and reliability of commercial trucks. By ensuring secure and stable connections between components, it plays a role in the efficient operation of engine and transmission systems. Its presence helps maintain the structural integrity of these systems, supporting the truck’s performance under various operating conditions.

Cummins: A Brief Overview

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 serves commercial truck, bus, construction, agricultural, and industrial markets. The company’s commitment to excellence is reflected in its wide range of products, including the Cummins 4988940 Plain Washer, which is designed to meet the demanding requirements of heavy-duty applications ³.

Cummins Plain Washer 4988940 Compatibility

The Cummins Plain Washer part number 4988940 is a critical component in the assembly of various engine systems. This part is designed to provide a smooth and secure interface between different parts, ensuring optimal performance and longevity of the engine.

Engine Compatibility

• 6B5.9 Series: The 4988940 Plain Washer is specifically engineered to fit within the 6B5.9 engine series. This engine is known for its robust design and reliability, often used in heavy-duty applications. The washer’s precision dimensions ensure it can withstand the high pressures and temperatures typical of these engines.

• Group Applications: This washer is also compatible with other Cummins engine groups where similar design specifications are required. Its versatility makes it a staple in various engine configurations, ensuring that it can be used across multiple models without compromising on performance.

Installation and Usage

The 4988940 Plain Washer is integral in maintaining the integrity of engine components by preventing leaks and ensuring proper alignment. Its application in the 6B5.9 engines and other compatible groups highlights its importance in the overall engine assembly process.

Material and Design

Constructed from high-quality materials, the 4988940 Plain Washer is designed to endure the demanding conditions of engine operation. Its design ensures that it can effectively distribute loads and reduce friction, contributing to the overall efficiency and durability of the engine.

Role of Part 4988940 Plain Washer in Engine Systems

In the context of engine systems, the part 4988940 Plain Washer is utilized in various components to ensure smooth operation and longevity.

Pump Systems

In pump systems, the Plain Washer is often positioned between the pump housing and the impeller. This placement allows for the reduction of friction between these two components, which can otherwise lead to wear and tear over time. By providing a smooth surface, the Plain Washer helps in maintaining the efficiency of the pump by ensuring that the impeller can rotate freely without unnecessary resistance. Additionally, it aids in the even distribution of load, which is essential for the consistent performance of the pump.

Auxiliary Systems

In auxiliary systems, such as those involving fuel injectors or oil filters, the Plain Washer plays a significant role in sealing and spacing. When installed between the injector body and the engine block, it ensures a proper seal, preventing leaks that could compromise the system’s integrity. Similarly, in oil filter housings, the Plain Washer helps in maintaining the correct spacing, which is vital for the filter to function effectively. This ensures that the oil passes through the filter media without bypassing, thus maintaining the cleanliness of the engine oil and prolonging the life of the engine components.

Conclusion

The Cummins 4988940 Plain Washer is a critical component in the maintenance and operation of commercial trucks and engines. Its role in load distribution, friction reduction, and component protection is essential for the efficient and reliable performance of truck and engine systems. Proper installation, regular maintenance, and understanding its compatibility and application are key to leveraging the benefits of this Cummins part.