3039398
Hexagon Head Cap Screw
Cummins®

The Hexagon Head Cap Screw, specifically Part #3039398 by Cummins, is a vital component in the realm of commercial trucks. Cummins, a renowned manufacturer in the automotive industry, produces this screw to meet the demanding requirements of heavy-duty applications. This part is integral to the fastening systems used in commercial trucks, ensuring secure and reliable connections across various components.

Basic Concepts of Hexagon Head Cap Screws

A Hexagon Head Cap Screw is a type of fastener characterized by its hexagonal head, which allows for efficient tightening and loosening using a wrench or socket. The screw’s design includes external threads that engage with internal threads in a mating part, creating a strong and secure connection. In fastening applications, these screws are preferred for their ability to distribute load evenly and provide a high resistance to loosening ¹.

Purpose of the 3039398 Hexagon Head Cap Screw in Truck Operation

The 3039398 Hexagon Head Cap Screw plays a specific role in the operation and maintenance of commercial trucks. It is used to fasten critical components, ensuring that parts remain securely attached under various operating conditions. This screw is particularly important in applications where vibrations and dynamic loads are common, as it helps maintain the integrity of the truck’s structure and systems ².

Key Features

The 3039398 Hexagon Head Cap Screw boasts several key features that enhance its performance and reliability. It is constructed from high-quality materials, typically a grade of steel that offers excellent strength and durability. The screw features a coarse thread type, which provides a robust grip and efficient load distribution. Its hexagonal head design allows for easy installation and removal using standard tools, ensuring convenience during maintenance procedures ³.

Benefits

Using the 3039398 Hexagon Head Cap Screw offers several benefits. Its durable construction ensures long-lasting performance, even in harsh operating environments. The screw’s design facilitates easy installation, reducing downtime during maintenance. Additionally, its resistance to loosening helps maintain secure connections, enhancing the overall safety and reliability of the truck ⁴.

Installation Guidelines

To ensure optimal performance and safety, follow these step-by-step instructions for installing the 3039398 Hexagon Head Cap Screw:

1. Prepare the Surface: Ensure the mating surfaces are clean and free of debris.
2. Align the Screw: Position the screw in the designated hole, ensuring proper alignment.
3. Insert the Screw: Begin threading the screw by hand to avoid cross-threading.
4. Tighten the Screw: Use a wrench or socket to tighten the screw to the manufacturer’s specified torque settings.
5. Verify Installation: Check the connection for security and proper torque.

Troubleshooting Common Issues

Common problems associated with Hexagon Head Cap Screws include loosening, corrosion, and damage. To troubleshoot these issues:

• Loosening: Re-tighten the screw to the specified torque. If loosening persists, inspect for vibrations or dynamic loads that may require additional securing methods.
• Corrosion: Clean the screw and mating surfaces. Apply a corrosion-resistant coating if necessary.
• Damage: Inspect the screw for signs of wear or damage. Replace the screw if it shows signs of fatigue or failure.

Maintenance Tips

Regular maintenance of the 3039398 Hexagon Head Cap Screw can prolong its lifespan and ensure continued reliable performance. Here are some recommendations:

• Periodic Inspection: Regularly check the screw for signs of wear, corrosion, or loosening.
• Torque Checks: Verify that the screw maintains the proper torque settings during routine maintenance.
• Cleaning: Keep the screw and mating surfaces clean to prevent debris buildup and corrosion.

Cummins: A Brief Overview

Cummins is a well-established manufacturer with a strong reputation in the automotive industry. Founded in 1919, Cummins has a long history of producing high-quality components for engines and power systems. The company is committed to innovation, quality, and customer satisfaction, making it a trusted name in the production of automotive parts, including the 3039398 Hexagon Head Cap Screw.

Hexagon Head Cap Screw 3039398 in Cummins Engines

The Hexagon Head Cap Screw 3039398 is a critical component in various Cummins engines, ensuring structural integrity and proper assembly. This part is integral to the assembly of several engine models, providing a reliable fastening solution.

ISM CM570

In the ISM CM570 engine, the Hexagon Head Cap Screw 3039398 is used to secure various components, ensuring that parts remain tightly fastened under operational stresses. This screw is essential for maintaining the alignment and stability of the engine’s internal and external structures.

L10 Series

For the L10 series, which includes the L10 CELECT, L10 GAS, and L10 MECHANICAL engines, the Hexagon Head Cap Screw 3039398 plays a pivotal role. It is used in multiple applications across these engines, including securing engine mounts, brackets, and other critical assemblies. The screw’s design ensures that these components are held firmly in place, contributing to the overall durability and performance of the engine.

M11 Series

The M11 CELECT, M11 CELECT PLUS, and M11 MECHANICAL engines also rely on the Hexagon Head Cap Screw 3039398. This screw is used in various locations within these engines, such as fastening the cylinder head, engine block, and other structural components. Its use in these engines underscores its importance in maintaining the integrity of the engine’s assembly.

QSM11 CM570

In the QSM11 CM570 engine, the Hexagon Head Cap Screw 3039398 is utilized to secure several key components. This includes fastening parts of the engine’s frame and other structural elements, ensuring that the engine operates smoothly and reliably under various conditions.

Role of Part 3039398 Hexagon Head Cap Screw in Engine Systems

The part 3039398 Hexagon Head Cap Screw is integral to the assembly and functionality of various engine components. In the context of the cam follower, this screw ensures secure attachment of the follower to its respective mounting points. This secure attachment is essential for maintaining the precise alignment and operation of the cam follower, which in turn ensures smooth and efficient valve operation.

Within the cylinder block, the 3039398 Hexagon Head Cap Screw plays a significant role in fastening critical components such as sensor brackets, mounting plates, and ancillary equipment. Its robust design provides the necessary tensile strength to withstand the dynamic forces and vibrations inherent in engine operation, thereby contributing to the overall stability and reliability of the cylinder block.

In the engine block, this screw is often used to secure various brackets, mounts, and covers. Its application in the engine block ensures that components remain firmly in place, which is vital for the structural integrity and performance of the engine. The screw’s hexagonal head allows for easy and secure tightening, reducing the risk of loosening over time due to engine vibrations.

Overall, the 3039398 Hexagon Head Cap Screw is a fundamental fastener that enhances the durability and operational efficiency of engine systems by providing secure and stable connections across multiple components.

Conclusion

The 3039398 Hexagon Head Cap Screw by Cummins is a critical component in the assembly and maintenance of commercial trucks and various Cummins engines. Its robust design, ease of installation, and resistance to loosening make it an essential fastener for ensuring the structural integrity and reliable performance of engine systems. Regular maintenance and proper installation are key to maximizing the lifespan and effectiveness of this Cummins part.