3900710
Hexagon Head Cap Screw
Cummins®

The Cummins Hexagon Head Cap Screw, part number 3900710, is a specialized fastener designed for use in commercial trucks. This screw is integral to the assembly and maintenance of various truck components, ensuring secure and reliable fastening. Its hexagonal head design allows for efficient torque application and removal using common hand tools, making it a practical choice for both installation and maintenance tasks.

Basic Concepts of Hexagon Head Cap Screws

A Hexagon Head Cap Screw is a type of fastener characterized by its hexagonal-shaped head, which provides a larger surface area for tool engagement compared to other screw head types ¹. This design facilitates easier and more controlled tightening and loosening, reducing the risk of cam-out—where a tool slips out of the screw head. Mechanically, these screws function by converting torque into clamping force, which holds components together securely. The hexagonal head is advantageous as it allows for consistent and precise application of torque, enhancing the reliability of the fastening ².

Role of the 3900710 Hexagon Head Cap Screw in Truck Operation

This Cummins part plays a significant role in the operation and maintenance of commercial trucks. It is commonly used in applications where high strength and durability are required, such as in the fastening of engine components, chassis parts, and other critical assemblies. Examples of typical applications include securing engine covers, attaching brackets, and fastening structural components within the truck’s frame.

Key Features of the 3900710 Hexagon Head Cap Screw

The 3900710 boasts several key features that contribute to its performance and durability. It is typically made from high-strength steel, ensuring it can withstand significant loads and stresses. The screw features a coarse thread, which provides excellent holding power and ease of installation. Additionally, it may be treated with a special coating to enhance corrosion resistance, making it suitable for use in various environmental conditions ³. These features collectively ensure that the screw maintains its integrity and functionality over time.

Benefits of Using the 3900710 Hexagon Head Cap Screw

Using this part offers several benefits. Its high strength and durable construction provide enhanced reliability in critical applications. The corrosion-resistant coating extends the screw’s lifespan, even in harsh operating environments. Additionally, the hexagonal head design allows for easy installation and removal, reducing the time and effort required during maintenance tasks. Compared to other fasteners, this screw offers a combination of strength, durability, and ease of use that makes it a preferred choice for commercial truck applications.

Installation and Usage Guidelines

Proper installation of the 3900710 is crucial for ensuring a secure fit. Begin by cleaning the mating surfaces to remove any debris or corrosion. Use a torque wrench to apply the recommended torque settings, which can typically be found in the manufacturer’s guidelines. It is important to avoid over-tightening, as this can lead to damage or stripping of the screw. Follow best practices for tightening, such as using a cross-pattern to ensure even distribution of clamping force.

Troubleshooting Common Issues

Common issues with the 3900710 may include loosening, corrosion, or damage. If the screw becomes loose, re-tighten it to the specified torque settings. For corrosion, clean the affected area and apply a corrosion-resistant coating if necessary. If the screw is damaged, it should be replaced to maintain the integrity of the fastening. Regular inspections can help identify and address these issues before they lead to more significant problems.

Maintenance Tips

To prolong the life of the 3900710, regular maintenance is recommended. Inspect the screws periodically for signs of loosening, corrosion, or damage. Clean the screws and surrounding areas to prevent the buildup of debris and contaminants. Re-tighten screws as needed to maintain secure fastening. If a screw shows significant wear or damage, it should be replaced to ensure continued reliability.

Cummins: Manufacturer Overview

Cummins Inc. is a renowned manufacturer with a long-standing reputation in the commercial truck industry. The company offers a wide range of products, including engines, powertrains, and components, designed to meet the demanding requirements of commercial vehicles. Cummins is known for its commitment to quality, innovation, and customer satisfaction, making it a trusted source for truck components. The 3900710 is just one example of Cummins’ dedication to providing reliable and high-performance parts for the trucking industry.

Hexagon Head Cap Screw 3900710 in Cummins Engines

This Cummins part is a critical component used in various Cummins engines, ensuring secure fastening and structural integrity. This part is integral to the assembly and maintenance of several engine models.

4B3.9 and 6B5.9 Engines

In the 4B3.9 and 6B5.9 engines, the 3900710 screw is utilized in several key areas. These engines, known for their reliability and performance, require precise fastening to maintain operational efficiency. The screw’s robust design ensures that components remain securely attached under high stress and varying conditions.

6C8.3 and B5.9 G Engines

Similarly, the 6C8.3 and B5.9 G engines benefit from the use of the 3900710 screw. These engines, often used in heavy-duty applications, demand components that can withstand significant mechanical loads. The screw’s hex head provides a reliable grip for tools, facilitating easy and secure installation and removal.

ISC CM850 and ISL9 CM2150 SN Engines

For the ISC CM850 and ISL9 CM2150 SN engines, the 3900710 screw is essential for maintaining the integrity of the engine’s structure. These engines are designed for high-performance applications, and the screw’s durability ensures that all parts remain firmly in place, contributing to the overall longevity and efficiency of the engine.

QSV81G and QSV91-G4 CM558/CM700 V102 Engines

In the QSV81G and QSV91-G4 CM558/CM700 V102 engines, the 3900710 screw plays a vital role in securing various components. These engines are known for their advanced technology and performance, and the screw’s precision engineering ensures that all parts are fastened correctly, enhancing the engine’s operational reliability.

QSV91G Engine

Finally, in the QSV91G engine, the 3900710 screw is used to secure critical components, ensuring that the engine operates smoothly and efficiently. This engine, designed for demanding applications, relies on the screw’s strength and reliability to maintain its structural integrity.

The use of the Cummins Hexagon Head Cap Screw part number 3900710 across these engines underscores its importance in maintaining the structural integrity and performance of Cummins engines.

Role of Part 3900710 Hexagon Head Cap Screw in Engine Systems

The 3900710 is integral to the secure assembly and operation of various engine components. It is commonly used in the fastening of the Coolant Heater Starting Aid, ensuring that the component remains firmly in place during engine operation. This is particularly important as the Coolant Heater Starting Aid is responsible for preheating the engine coolant, facilitating easier starts in cold conditions.

In the Exhaust System, the screw plays a role in securing the Exhaust Outlet and Exhaust Brake. Proper fastening is essential to maintain the integrity of the exhaust flow and to ensure that the Exhaust Brake functions correctly, providing additional control during vehicle deceleration.

The screw is also utilized in the Panel attachments, where it secures various engine covers and access panels. This not only protects internal components but also streamlines the engine’s appearance and functionality.

Within the Generator Control System, the 3900710 ensures that control modules and sensors are mounted securely. This is vital for the accurate monitoring and regulation of the generator’s output, contributing to the overall efficiency and reliability of the system.

In Plumbing applications, the screw is employed to fasten components of the Coolant System. This includes connections to the Coolant Heater Starting Aid, ensuring that there are no leaks and that the coolant circulates effectively throughout the engine.

The screw is also found in the Ignition System, where it secures ignition components, ensuring consistent and reliable spark delivery to the engine cylinders. This is fundamental for the engine’s combustion process and overall performance.

Lastly, in the Electronic Engine Control system, the screw is used to mount various control units and wiring harnesses. This ensures that the electronic components remain stable and are not subjected to vibrations that could disrupt their function.

Conclusion

The Cummins Hexagon Head Cap Screw, part number 3900710, is a critical component in the assembly and maintenance of commercial truck engines. Its robust design, high strength, and corrosion resistance make it suitable for various applications, ensuring secure fastening and reliable operation. Proper installation, regular maintenance, and timely replacement of worn or damaged screws are essential to maintain the integrity and performance of the engine systems.