3902630
Round Head Cap Screw
Cummins®

The Round Head Cap Screw 3902630, manufactured by Cummins, is a specialized fastener designed for use in commercial trucks. Cummins, a well-established name in the commercial truck industry, produces this screw to meet the demanding requirements of truck operations. This part is integral to various truck systems, ensuring components are securely fastened and maintained.

Basic Concepts of Round Head Cap Screws

Round head cap screws are a type of fastener characterized by a rounded head and a threaded shank. They are commonly used in mechanical assemblies to secure components together. The rounded head provides a larger surface area for distribution of clamping force, reducing the risk of damage to the fastened material. These screws function by creating a secure connection between parts, ensuring stability and integrity in the assembly.

Purpose of Round Head Cap Screw 3902630 in Truck Operation

This Cummins part plays a significant role in the operation and maintenance of commercial trucks. It is utilized in various truck systems, including the engine, transmission, and chassis. This screw ensures that critical components are securely fastened, which is vital for the safe and efficient operation of the vehicle. Its applications range from attaching engine components to securing parts of the truck’s frame and body.

Key Features

The 3902630 is designed with several key features to enhance its performance. It is typically made from high-strength steel, ensuring durability and resistance to wear ¹. The screw features a coarse thread, which provides a strong grip and easy installation. The rounded head design allows for the use of standard tools, simplifying the fastening process. Additionally, it may have special coatings or treatments to improve corrosion resistance and longevity.

Benefits

Using the 3902630 offers several benefits. Its high-strength material composition ensures durability, making it suitable for high-stress environments commonly found in commercial trucks. The screw’s resistance to corrosion extends its service life, even in harsh conditions. Ease of installation is another advantage, as the coarse thread allows for quick and secure fastening. Reliability is ensured through its robust design and material properties.

Installation Guidelines

Proper installation of the 3902630 is crucial for its performance and longevity. Begin by ensuring the mating surfaces are clean and free of debris. Use a torque wrench to apply the recommended torque specifications, which can be found in the vehicle’s maintenance manual. This ensures the screw is tightened to the correct tension, avoiding over-tightening or under-tightening. Standard tools such as a socket wrench or screwdriver are typically required for installation.

Troubleshooting Common Issues

Common issues with round head cap screws include loosening, corrosion, and damage. If a screw becomes loose, it should be re-tightened to the specified torque. Corrosion can be addressed by cleaning the affected area and applying a corrosion-resistant coating. Damaged screws should be replaced to maintain the integrity of the assembly. Regular inspections can help identify these issues early, allowing for timely maintenance.

Maintenance Tips

Regular maintenance of the 3902630 is important for ensuring its longevity and reliable performance. Inspection intervals should be established based on the truck’s usage and operating conditions. Look for signs of wear, corrosion, or loosening during inspections. Replacement criteria should be based on the screw’s condition and any manufacturer recommendations. Keeping screws clean and free of debris will also contribute to their longevity.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. Founded in 1919, Cummins has a long-standing reputation for quality and innovation in the commercial truck industry. The company offers a wide range of products, including engines, powertrains, and aftermarket parts, designed to meet the needs of various industries. Cummins’ commitment to excellence and customer satisfaction has established it as a trusted name in the industry.

Round Head Cap Screw 3902630 in Cummins Engines

The 3902630, manufactured by Cummins, is a critical component in various Cummins engine models. This screw is integral to the assembly and maintenance of the engines, ensuring secure fastening of parts and components.

4B3.9 and 6B5.9 Engines

In the 4B3.9 and 6B5.9 engines, the 3902630 is utilized in several key areas. It plays a vital role in securing the cylinder heads to the engine block, ensuring a tight seal and preventing leaks. Additionally, it is used in the fastening of various engine components, contributing to the overall structural integrity and performance of the engine.

6C8.3 and B3.9 G Engines

For the 6C8.3 and B3.9 G engines, this screw is similarly essential. It is employed in the attachment of the engine’s exhaust manifold, ensuring that it remains securely fastened to the engine block. This is crucial for maintaining the exhaust system’s integrity and preventing any exhaust leaks that could affect engine performance and emissions.

G5.9 and G5.9 CM558 Engines

In the G5.9 and G5.9 CM558 engines, the 3902630 is used in the assembly of the turbocharger system. It secures the turbocharger to the engine block, ensuring that it operates efficiently and reliably. This screw is also used in the fastening of various other components, contributing to the engine’s overall stability and performance.

The use of the 3902630 in these engines underscores its importance in maintaining the structural and functional integrity of Cummins engines. Its reliable performance and secure fastening capabilities make it an indispensable component in the assembly and maintenance of these engines.

Role of Part 3902630 Round Head Cap Screw in Engine Systems

In the intricate assembly of engine systems, the 3902630 serves as a fundamental fastening component, ensuring the secure attachment of various components.

Cover Assembly

Within the cover assembly, the Round Head Cap Screw is employed to fasten the cover to the engine block or other structural elements. This secure attachment is essential for maintaining the integrity of the engine’s enclosure, protecting internal components from external contaminants and ensuring optimal performance. The screw’s design allows for a tight and durable connection, which is vital for the cover’s role in containing engine oil and other fluids.

Front Gear Attachment

The front gear, a key component in the engine’s timing mechanism, relies on the Round Head Cap Screw for secure mounting. This screw is used to attach the front gear to the engine’s camshaft or crankshaft, depending on the specific engine design. The precise and reliable fastening provided by the screw ensures that the front gear operates smoothly and maintains accurate timing, which is essential for the engine’s overall efficiency and performance.

The Round Head Cap Screw’s role in these components underscores its importance in maintaining the structural and functional integrity of engine systems.

Conclusion

The 3902630 Round Head Cap Screw is a critical component in the operation and maintenance of commercial trucks and Cummins engines. Its high-strength material, resistance to corrosion, and ease of installation make it an indispensable part in ensuring the secure fastening of various components. Proper installation, regular maintenance, and timely troubleshooting are essential for maximizing the performance and longevity of this part.