3990903
Mounting Spacer
Cummins®

The Cummins 3990903 Mounting Spacer is a component designed for use in heavy-duty trucks. It serves a specific role in ensuring the proper installation and alignment of various truck components. This part is significant within the context of heavy-duty truck maintenance and performance, contributing to the overall efficiency and longevity of the vehicle.

Purpose and Function

The Cummins 3990903 Mounting Spacer facilitates the correct alignment and spacing between components in heavy-duty trucks. By maintaining the precise distance and orientation between parts, it helps ensure that the truck operates efficiently and durably. Proper alignment is crucial for the optimal functioning of the truck’s systems, reducing the risk of mechanical issues and enhancing performance ¹.

Key Features

The Cummins 3990903 Mounting Spacer is constructed from high-quality materials, ensuring durability and reliability in demanding truck environments. Its dimensions are specifically designed to fit within the truck’s mounting system, providing the necessary space and alignment for components. Unique design elements may include features that enhance its functionality, such as anti-vibration properties or easy installation mechanisms.

Benefits

Utilizing the Cummins 3990903 Mounting Spacer offers several advantages. It contributes to improved component alignment, which can lead to reduced vibration during operation. This, in turn, enhances the overall durability of the truck’s components. Additionally, by ensuring proper installation and alignment, the spacer can contribute to prolonged equipment lifespan, potentially leading to cost savings for the truck owner ².

Installation Guidelines

For the proper installation of the Cummins 3990903 Mounting Spacer, it is recommended to follow a series of steps to ensure successful integration into the truck’s system. This may involve using specific tools, adhering to safety precautions, and following best practices for alignment and securing the spacer in place. Detailed instructions should be consulted to ensure a correct installation.

Maintenance and Troubleshooting

To maintain the Cummins 3990903 Mounting Spacer and ensure long-term performance, regular inspections are advised. Common issues that may arise with mounting spacers include misalignment or wear. Troubleshooting steps may involve checking for proper alignment, inspecting for signs of wear or damage, and replacing the spacer if necessary. Adhering to maintenance schedules can help prevent issues and ensure the spacer continues to function effectively.

Manufacturer Overview - Cummins

Cummins Inc. is a well-established manufacturer with a history of producing high-quality automotive components. The company is recognized for its commitment to innovation and excellence in the automotive industry. Cummins plays a significant role in advancing heavy-duty truck technology, offering a range of products designed to enhance performance, efficiency, and durability. Their reputation for quality and reliability makes them a trusted name in the industry.

Cummins Engine Part 3990903: Mounting Spacer

The Cummins part 3990903, a Mounting Spacer, is a critical component in ensuring the proper alignment and stability of various engine parts. This part is designed to fit seamlessly with several Cummins engine models, providing a reliable interface between different components.

Compatibility with Cummins Engines

6C8.3 and C8.3 G Engines

The 3990903 Mounting Spacer is specifically engineered to fit the 6C8.3 and C8.3 G engines. These engines are known for their robust performance and reliability, often used in heavy-duty applications. The mounting spacer ensures that the engine components are correctly positioned, reducing wear and tear and enhancing overall engine longevity.

C GAS PLUS CM556 Engine

Similarly, the 3990903 Mounting Spacer is also compatible with the C GAS PLUS CM556 engine. This engine model is designed for efficiency and power, making it a popular choice in various industrial applications. The mounting spacer plays a crucial role in maintaining the structural integrity of the engine, ensuring that all parts operate in harmony.

Importance of the Mounting Spacer

The mounting spacer is essential for several reasons:

• Alignment: It ensures that engine components are correctly aligned, which is vital for smooth operation and longevity.
• Stability: By providing a stable connection between parts, it helps in reducing vibrations and noise, contributing to a smoother engine performance.
• Protection: It protects the engine from undue stress and strain, which can lead to premature wear and failure.

Installation and Maintenance

Proper installation of the 3990903 Mounting Spacer is crucial. It should be checked regularly for any signs of wear or damage. Any issues with the mounting spacer can lead to misalignment and increased wear on other engine components, potentially causing significant downtime and repair costs.

By ensuring that the 3990903 Mounting Spacer is correctly installed and maintained, engine operators can enjoy the full benefits of their Cummins engines, including enhanced performance and reliability.

Role of Part 3990903 Mounting Spacer in Engine Systems

The part 3990903 Mounting Spacer is instrumental in ensuring the proper alignment and spacing between various components within engine systems. Specifically, it facilitates the integration of the Compressor and Air Intake system.

Compressor Integration

In the Compressor assembly, the Mounting Spacer ensures that the compressor wheel is correctly positioned relative to the compressor housing. This precise alignment is essential for optimal airflow and efficiency. The spacer helps maintain the necessary clearances, preventing any potential contact between moving parts that could lead to wear or damage. Additionally, it assists in managing thermal expansion, ensuring that the compressor operates within its designed parameters even under varying temperature conditions.

Air Intake System

Within the Air Intake system, the Mounting Spacer plays a significant role in securing the air filter housing and intake tract to the engine block or other structural components. This secure attachment is vital for maintaining a sealed air path, which is necessary for efficient air delivery to the engine. The spacer helps in absorbing vibrations and reducing the transmission of noise, contributing to a smoother operation of the intake system. Furthermore, it ensures that the air intake components remain stable during engine operation, which is particularly important under high-stress conditions such as acceleration or deceleration.

Overall, the part 3990903 Mounting Spacer is a key component in maintaining the structural integrity and operational efficiency of both the Compressor and Air Intake systems within engine assemblies.

Conclusion

The Cummins 3990903 Mounting Spacer is a vital component in the maintenance and performance of heavy-duty trucks and Cummins engines. Its role in ensuring proper alignment, stability, and protection of engine components contributes significantly to the efficiency, durability, and longevity of the vehicle. Regular maintenance and proper installation of this part are essential to maximize its benefits and ensure the optimal performance of the truck or engine.