3900225
Hexagon Head Cap Screw
Cummins®

The 3900225 Hexagon Head Cap Screw by Cummins is a specialized fastener designed for use in commercial truck maintenance and operation. This screw plays a role in securing various components within truck assemblies, ensuring structural integrity and reliable functionality. Understanding its purpose and significance is vital for maintaining the efficiency and safety of commercial trucks.

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. These screws are commonly used in mechanical assemblies to secure components together, providing a strong and durable connection. The hexagonal shape of the head is designed to prevent the tool from slipping, ensuring precise and controlled fastening ¹.

Purpose and Role in Truck Operation

The 3900225 Hexagon Head Cap Screw is specifically designed to contribute to the structural integrity and functionality of truck components. It is used in various applications within the truck, such as securing engine parts, transmission components, and chassis elements. By providing a robust fastening solution, this screw helps maintain the alignment and stability of critical truck systems, ensuring optimal performance and safety during operation ².

Key Features

The 3900225 Hexagon Head Cap Screw boasts several key features that enhance its performance and durability. It is typically made from high-strength materials, such as alloy steel, which provides excellent resistance to wear and corrosion. The screw features a fine or coarse thread, depending on the application, allowing for secure and reliable fastening. Additionally, its design may include features such as a countersunk head for flush installation or a coated surface to improve corrosion resistance ³.

Benefits

Using the 3900225 Hexagon Head Cap Screw offers several benefits. Its high-strength material composition ensures improved fastening strength, making it suitable for demanding applications. The screw’s design provides resistance to vibration, reducing the risk of loosening over time. Furthermore, the hexagonal head allows for easy installation and removal, enhancing efficiency during maintenance procedures ⁴.

Installation Guidelines

Proper installation of the 3900225 Hexagon Head Cap Screw is crucial for ensuring its effectiveness and longevity. Follow these guidelines for optimal results:

1. Clean the installation area to remove any debris or contaminants.
2. Use the appropriate wrench or socket to begin tightening the screw.
3. Apply torque specifications as recommended by the manufacturer to achieve the desired fastening strength.
4. Ensure the screw is fully seated and the components are properly aligned.
5. Double-check the torque settings to confirm the screw is securely fastened.

Troubleshooting and Maintenance

Common issues with Hexagon Head Cap Screws include loosening due to vibration or corrosion. To troubleshoot these problems, regularly inspect the screws for signs of wear or damage. If corrosion is detected, consider using a coated screw to improve resistance. To maintain optimal performance, periodically check the torque settings and retighten if necessary. Additionally, keep the installation area clean and free of contaminants to prevent premature wear.

Compatibility and Applications

The 3900225 Hexagon Head Cap Screw is designed for use in various truck assemblies, including engine components, transmission systems, and chassis structures. It is compatible with a wide range of truck models and applications, making it a versatile choice for commercial truck maintenance. When selecting screws for specific applications, consider factors such as material compatibility, thread type, and environmental conditions to ensure the best performance.

Safety Considerations

When handling and installing the 3900225 Hexagon Head Cap Screw, it is important to observe safety considerations to protect yourself and others. Wear appropriate personal protective equipment (PPE), such as gloves and safety glasses, to prevent injuries. Follow safe work practices, including using the correct tools and observing torque specifications, to ensure a secure and reliable fastening. Additionally, be aware of your surroundings and any potential hazards that may arise during the installation process.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a rich history spanning over a century, Cummins is committed to providing high-quality, innovative solutions for the automotive industry. The company’s product range includes engines, powertrains, and related components, all designed to meet the demanding requirements of commercial vehicles. Cummins’ dedication to quality and innovation ensures that their products, such as the 3900225 Hexagon Head Cap Screw, deliver reliable performance and durability in various applications.

Hexagon Head Cap Screw 3900225 Compatibility with Cummins Engines

The Cummins Hexagon Head Cap Screw part number 3900225 is a versatile component designed to fit a wide range of Cummins engines. This screw is integral in securing various parts and assemblies within the engine, ensuring structural integrity and operational efficiency.

B Series Engines

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

The 3900225 screw is compatible with the B series engines, which are known for their reliability and performance. These engines are used in a variety of applications, from agricultural machinery to industrial power systems. The screw’s robust design ensures it can withstand the operational stresses of these engines.

C Series Engines

• C GAS PLUS CM556

The C series engines, including the C GAS PLUS CM556, benefit from the 3900225 screw in maintaining the alignment and stability of critical engine components. This screw’s precision threading and high-strength material make it ideal for securing parts in these engines.

G Series Engines

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

The G series engines, such as the G5.9, G8.3, and GTA8.3 CM558, also utilize the 3900225 screw. These engines are often found in heavy-duty applications, and the screw’s durability and reliability are crucial for their performance. The screw’s design ensures that it can handle the high torque and pressure environments typical of these engines.

F Series Engines

• F3.8 CM2350 F128C, F3.8 CM2620 F137B, F4.5 CM2620 F139B, F4.5 CM2620 F141C

The F series engines, including the F3.8 and F4.5 models, also incorporate the 3900225 screw. These engines are known for their efficiency and power, and the screw’s precision ensures that all components are securely fastened, contributing to the engine’s overall performance and longevity.

The 3900225 Hexagon Head Cap Screw is a critical component in the assembly and maintenance of these Cummins engines, providing the necessary strength and reliability to ensure optimal engine performance.

Role of Part 3900225 Hexagon Head Cap Screw in Engine Systems

The part 3900225 Hexagon Head Cap Screw is integral to the secure assembly and operation of various engine components. It is utilized in fastening the Accessory Drive Pulley, ensuring the smooth transfer of power to accessories like the alternator and air conditioning compressor.

In the Control Panel Wiring Harness, this screw plays a part in maintaining the integrity of electrical connections, which is vital for the proper functioning of engine controls and monitoring systems.

For the Crankcase Breather, the screw helps in securing the breather system, which is essential for releasing pressure from the crankcase and maintaining engine health.

When it comes to the Cylinder Head, the screw is used to fasten components that are critical for combustion efficiency and engine performance.

The Debris Shield relies on this screw for secure attachment, protecting internal engine components from contaminants.

In the Engine Brake system, the screw ensures that components are tightly secured, contributing to the effective operation of the brake.

For the Engine Instrument Panel, it is used to fasten gauges and indicators, ensuring they remain in place and function correctly.

In the Exhaust Brake system, the screw helps in securing components that are essential for controlling exhaust flow and improving engine braking.

The Exhaust Outlet Connection uses this screw to ensure a secure and leak-free connection between the engine and the exhaust system.

For the Fan Drive Mounting, the screw is crucial for securing the fan drive, which is responsible for cooling the engine.

In the Flywheel Top Level Assembly Housing, it ensures that all components are securely fastened, contributing to the smooth operation of the flywheel.

The Fuel Filter Plumbing relies on this screw to secure connections, ensuring a consistent and clean fuel supply to the engine.

In the Generator Control Panel, the screw is used to fasten components that are essential for the generator’s operation and control.

For the Guard Package, it ensures that protective guards are securely attached, safeguarding other engine components.

In the Housing, the screw is used to secure various housing components, ensuring they remain in place and function as intended.

For the Flywheel Repto, it ensures that all components are securely fastened, contributing to the efficient operation of the flywheel.

In the Kit, the screw is used to secure components within the kit, ensuring they are ready for installation.

For the Repto Upfit, it ensures that upfit components are securely attached, enhancing the engine’s performance and capabilities.

In the Manual Engine Control System, the screw is used to fasten components that are essential for manual control and operation of the engine.

For the Oil Fill Arrangement, it ensures that the oil fill components are securely attached, facilitating easy and secure oil changes.

In the Oil Pan, the screw is used to secure the pan to the engine, ensuring it remains in place and functions correctly.

For the Oil Tank, it ensures that the tank is securely attached, maintaining the integrity of the oil supply system.

In Performance Parts, the screw is used to secure high-performance components, enhancing engine efficiency and power.

For the Product Enclosure, it ensures that the enclosure is securely attached, protecting internal components.

In the Product Installation Package, the screw is used to secure components within the package, ensuring they are ready for installation.

For the Vacuum Pump, it ensures that the pump is securely attached, contributing to the efficient operation of the vacuum system.

In Wiring Accessories, the screw is used to secure wiring components, ensuring they remain in place and function correctly.

Conclusion

The 3900225 Hexagon Head Cap Screw by Cummins is a critical component in the maintenance and operation of commercial trucks and Cummins engines. Its robust design, high-strength material, and precise threading make it ideal for securing various engine components, ensuring structural integrity and operational efficiency. Proper installation and maintenance of this screw are essential for the reliable performance and safety of commercial vehicles.