3990737
Push Rod Cover
Cummins®

Introduction

The Cummins 3990737 Push Rod Cover is a component designed for use in heavy-duty truck engines. Its primary role is to encase and protect the push rods and other internal components within the engine. By providing a secure enclosure, this part contributes to the overall operation and reliability of the engine system in heavy-duty applications.

Purpose and Function

The Cummins 3990737 Push Rod Cover serves to shield the push rods and associated engine components from external contaminants and physical damage. This protection is vital for maintaining the integrity and performance of the engine ¹. The cover also helps in containing any lubricants or coolants that may be present within the engine compartment, ensuring they remain where they are needed most. Additionally, the Push Rod Cover plays a part in reducing noise and vibration emanating from the engine, contributing to a smoother operation ².

Key Features

The Cummins 3990737 Push Rod Cover is constructed from durable materials that are resistant to the harsh conditions found in heavy-duty truck environments. Its design incorporates precise engineering to ensure a snug fit over the push rods and other components it is meant to protect. The cover is built to withstand high temperatures and pressures, ensuring long-lasting performance. Unique attributes of the Push Rod Cover may include specialized coatings or treatments that enhance its resistance to corrosion and wear ³.

Benefits

The use of the Cummins 3990737 Push Rod Cover offers several advantages. It provides enhanced protection for the engine’s internal components, which can lead to improved durability and reliability. The cover’s ability to contain lubricants and coolants contributes to maintaining optimal engine performance. Additionally, by reducing noise and vibration, the Push Rod Cover can contribute to a more comfortable driving experience and potentially extend the lifespan of the engine by minimizing wear on components.

Installation and Compatibility

Proper installation of the Cummins 3990737 Push Rod Cover is crucial for ensuring its effectiveness and the continued performance of the engine. Installation procedures should follow manufacturer guidelines to ensure a secure and proper fit. It is important to verify compatibility with the specific engine model to ensure correct fitment and function. Any specific requirements or recommendations provided by Cummins should be adhered to during the installation process.

Maintenance and Troubleshooting

To ensure the Cummins 3990737 Push Rod Cover continues to perform optimally, regular maintenance is recommended. This includes periodic inspections for signs of wear, damage, or leaks. Cleaning the cover according to manufacturer recommendations can help prevent the buildup of contaminants that may affect its performance. Common issues that may arise with the Push Rod Cover include leaks or damage from impacts. Troubleshooting these issues may involve checking for proper fitment, ensuring all fasteners are secure, and inspecting for any signs of wear or damage that may require repair or replacement.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a reputation for producing high-quality components that are trusted in a wide range of industries, including automotive, construction, and agriculture. The company’s commitment to innovation, quality, and customer satisfaction has made it a preferred choice for heavy-duty applications.

Compatibility with Cummins Engines

The Push Rod Cover part number 3990737, manufactured by Cummins, is designed to fit a variety of Cummins engines. Here is a detailed breakdown of its compatibility:

B5.9 Series Engines

• B5.9 G
• B5.9 GAS PLUS CM556

These engines are part of the B5.9 family, and the Push Rod Cover 3990737 is specifically engineered to fit these models. This cover is essential for maintaining the integrity of the push rod system, ensuring smooth engine operation.

G5.9 Series Engines

• G5.9
• G5.9 CM558

The G5.9 series engines, including the G5.9 and G5.9 CM558, are also compatible with the Push Rod Cover 3990737. This part is crucial for protecting the push rods and ensuring the engine’s mechanical components function correctly.

ISB Series Engines

• ISB CM550
• ISB5.9 CM2880 B127

The ISB series engines, such as the ISB CM550 and ISB5.9 CM2880 B127, are designed to use the Push Rod Cover 3990737. This cover is integral to the engine’s design, providing necessary protection and support to the push rods.

QSB5.9 Series Engines

• QSB5.9 30 CM550
• QSB5.9 44 CM550

The QSB5.9 series engines, including the QSB5.9 30 CM550 and QSB5.9 44 CM550, are also compatible with the Push Rod Cover 3990737. This part ensures that the push rods are adequately protected, contributing to the overall reliability and performance of the engine.

By ensuring the Push Rod Cover 3990737 is correctly installed, engine owners can maintain the functionality and longevity of their Cummins engines.

Role of Part 3990737 Push Rod Cover in Engine Systems

The 3990737 Push Rod Cover is a component in the arrangement of various engine systems, particularly within the short block kit. This cover is strategically positioned to encapsulate and protect the cam follower and its associated mechanisms.

When integrated into the engine, the Push Rod Cover works in conjunction with the Cam Follower Cover to ensure the smooth operation of the valve train. It provides a sealed environment that prevents contaminants from entering the crankcase, thus maintaining the integrity of the engine’s internal components.

The Push Rod Cover also plays a role in the breather system. It is designed to allow controlled ventilation, which helps manage pressure within the crankcase. This is vital for the efficient operation of the engine, as it ensures that any buildup of gases is properly vented, reducing the risk of oil leaks and maintaining optimal performance.

Conclusion

In summary, the Cummins 3990737 Push Rod Cover is a key component that enhances the functionality and reliability of the engine systems it is a part of. Its integration with the Cam Follower, Cam Follower Cover, and the breather system underscores its importance in the overall engine arrangement.