3900269
Plain Washer
Cummins®

The Cummins 3900269 Plain Washer is a critical component in commercial truck operations, designed to enhance the efficiency and reliability of mechanical systems. Understanding its purpose and functionality is essential for maintaining and optimizing truck performance.

Basic Concepts of Plain Washers

Plain washers are fundamental components in mechanical systems, serving as thin, flat rings placed under bolt heads or nuts. Their primary function is to distribute the load evenly and protect surfaces from damage by providing a barrier between the fastener and the secured surface ¹. Materials commonly used include steel, stainless steel, and various alloys, each offering unique properties such as corrosion resistance, strength, and durability ².

Role of the 3900269 Plain Washer in Truck Operations

This Cummins part is vital in commercial truck operations, used in various applications requiring secure fastening. It ensures uniform load distribution and surface protection, contributing to the functionality and efficiency of truck components. Its presence is crucial for maintaining secure fastenings under varying conditions, ensuring the safe and reliable operation of commercial vehicles ³.

Key Features

The 3900269 Plain Washer is characterized by its high-quality material composition and design. Crafted from durable materials, it is designed to withstand demanding conditions. Unique features may include specific dimensions, surface treatments for corrosion resistance, and material properties that enhance its performance in commercial truck applications.

Benefits

Using the 3900269 Plain Washer offers several benefits, including improved fastening performance, enhanced durability under stress and environmental conditions, and cost-effectiveness due to its longevity and reliability. The washer’s design and material properties contribute to these advantages, making it a valuable component in truck maintenance and operations.

Troubleshooting and Maintenance

Common issues with plain washers include wear, corrosion, and failure under load. Troubleshooting involves inspecting for damage, ensuring the correct size and material, and replacing if necessary. Maintenance tips include regular inspection, proper installation, and using compatible fasteners and components to ensure the longevity and proper function of this part.

About Cummins

Cummins Inc. is a global leader in power solutions, including engines, filtration, and aftermarket parts. Known for its innovation and commitment to quality, Cummins manufactures high-quality components like the 3900269 Plain Washer, designed to meet the demanding requirements of commercial truck operations.

Cummins Engine Compatibility with Part 3900269

This part is designed to fit various Cummins engines, ensuring proper sealing and alignment in different engine components. Below is a detailed description of its compatibility across different engine models:

B Series Engines

• B3.9, B3.9 G
• B4.5, B4.5 CM2350 B129B, B4.5 RGT
• B5.6 CM2670 B152B
• B5.9, B5.9 CM2670 B166C, B5.9 G, B5.9 GAS PLUS CM556
• B6.7, B6.7 CM2350 B135B, B6.7 CM2670 B153B, B6.7 CM2670 B164C, B6.7 G CMOH6.0 B125

C Series Engines

• C GAS PLUS CM556
• C8.3, C8.3 G

D Series Engines

• D4.0 CM2620 D103B

F Series Engines

• F4.5 CM2620 F139B

G Series Engines

• G5.9, G5.9 CM558
• G8.3, G8.3 CM558
• GTA8.3 CM558

ISB (Chrysler)

• ISB (Chrysler)

Role of Part 3900269 Plain Washer in Engine Systems

This part is integral to the smooth operation and assembly of various engine components. Its primary function is to provide a stable and secure interface between moving and stationary parts, reducing friction and wear.

Adapter and Drive Systems

In both front and rear drive systems, the Plain Washer ensures that adapters are properly aligned and secured, which is crucial for optimal performance and efficient power transfer.

Alternator and Engine Mounting

For the alternator drive and alternator location, the Plain Washer secures the alternator to the engine, ensuring stable electrical supply. In engine mounting applications, it helps distribute the load evenly, preventing undue stress on the mounting system.

Flywheel and Flexplate Assemblies

In flywheel and flexplate assemblies, the Plain Washer maintains the correct spacing and alignment between the flywheel or flexplate and the engine housing, ensuring smooth power system operation.

Marine and Rocker Lever Applications

For marine gear applications, the Plain Washer ensures smooth gear operation within its housing. In rocker lever systems, it provides a smooth surface for the lever to pivot on, enhancing system efficiency and longevity.

Repower and Upfit Kits

In repower and upfit kits, the Plain Washer ensures that new components are securely and correctly installed, maintaining alignment and spacing of critical components.

Vibration Damper and Support Systems

The Plain Washer is utilized in vibration dampers to ensure effective operation, reducing engine vibrations. In front engine support systems, it maintains the structural integrity of the support, ensuring the engine remains securely in place.

Motor Generator System and Rear Power Take-Off Kit

In motor generator systems, the Plain Washer ensures secure mounting and alignment of the generator, allowing for efficient power generation. In rear power take-off kits, it maintains the connection between the engine and the take-off system, ensuring reliable power transfer.

Conclusion

The Cummins 3900269 Plain Washer is a versatile and essential component that enhances the performance and longevity of various engine systems. By providing a stable and friction-reducing interface between components, it contributes to the overall integrity and functionality of engine systems in commercial trucks.