3906376
Balancer Shaft
Cummins®

The Hexagon Head Cap Screw, specifically Part #3906376 by Cummins, is a vital component in the realm of commercial trucks. Cummins, a renowned manufacturer in the industry, produces this screw to meet the demanding requirements of heavy-duty applications. This screw is integral to the fastening systems used in commercial trucks, ensuring components remain securely attached under various operational conditions.

Basic Concepts of Hexagon Head Cap Screw

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 secure connection. In fastening applications, these screws play a role by providing a strong, reliable hold that can withstand significant stress and vibration ¹.

Purpose of the 3906376 Hexagon Head Cap Screw in Truck Operations

This Cummins part is designed to fulfill specific roles in the operation and maintenance of commercial trucks. It is used to fasten various components, ensuring they remain securely in place during operation. This screw is particularly important in applications where durability and resistance to loosening are required, such as in engine components, chassis parts, and other critical areas of the truck.

Key Features of the 3906376 Hexagon Head Cap Screw

The 3906376 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 corrosion resistance. The screw features a coarse thread type, which provides a strong grip and easy installation. Its hexagonal head design allows for efficient torque application, ensuring secure fastening ².

Benefits of Using the 3906376 Hexagon Head Cap Screw

Utilizing this part offers several advantages. Its durable construction ensures long-lasting performance even under demanding conditions. The ease of use, thanks to its hexagonal head, allows for quick and efficient installation and removal. Additionally, the screw’s design helps resist loosening, maintaining a secure connection over time and reducing the need for frequent re-tightening ³.

Installation and Usage Guidelines

To ensure optimal performance, the 3906376 should be installed following specific guidelines. Begin by ensuring the mating threads are clean and free of debris. Insert the screw and begin tightening it by hand to avoid cross-threading. Once started, use a wrench or socket to continue tightening until the desired torque is achieved. It is important to avoid over-tightening, which can damage the screw or the mating part.

Troubleshooting Common Issues

Common issues with Hexagon Head Cap Screws can include loosening over time, corrosion, or damage from over-tightening. To address loosening, ensure the screw is properly torqued during installation and check for any signs of wear or damage to the mating threads. Corrosion can be mitigated by using screws made from corrosion-resistant materials and applying a protective coating if necessary. If damage occurs from over-tightening, replace the screw and ensure proper torque specifications are followed during reinstallation.

Maintenance Tips

Regular maintenance of the 3906376 can prolong its lifespan and ensure continued reliable performance. Inspect screws periodically for signs of wear, corrosion, or loosening. Clean the threads and surrounding areas to remove any debris that could affect performance. Applying a thread locker or anti-seize compound can help prevent loosening and corrosion. Follow the manufacturer’s recommendations for torque settings and replacement intervals to maintain optimal performance.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration, and emissions technologies. With a strong reputation in the commercial truck industry, Cummins is known for its commitment to quality, innovation, and customer satisfaction. The company’s extensive product range and robust engineering ensure that their components, like the 3906376, meet the high standards required for heavy-duty applications ⁴.

Hexagon Head Cap Screw 3906376 in Cummins Engines

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

4B3.9 and B3.9 G Engines

In the 4B3.9 and B3.9 G engines, the 3906376 is used in multiple applications. These engines, known for their reliability and performance, require precise fastening to maintain structural integrity and operational efficiency. The screw is often employed in securing engine blocks, cylinder heads, and other critical components, ensuring that these parts remain tightly fastened under the high stresses and temperatures encountered during operation.

B4.5 Engine

The B4.5 engine also utilizes the 3906376 in its assembly. This engine, part of Cummins’ lineup, benefits from the screw’s robust design, which provides the necessary strength and durability to withstand the rigors of heavy-duty operations. The screw’s application in the B4.5 engine includes fastening various engine components, ensuring that the engine operates smoothly and efficiently.

QSB3.9 30 CM550 Engine

The QSB3.9 30 CM550 engine incorporates the 3906376 in several key areas. This engine, designed for demanding applications, relies on the screw’s precision and strength to secure components that are critical to its performance. The screw’s role in the QSB3.9 30 CM550 engine includes fastening parts that are subjected to significant mechanical stress, ensuring that the engine maintains its structural integrity and operational efficiency.

Grouping of Engines

The 4B3.9 and B3.9 G engines, while distinct, share many common components and design philosophies. The use of the 3906376 in both engines highlights the importance of this part in maintaining the structural and operational integrity of these engines. Similarly, the B4.5 and QSB3.9 30 CM550 engines, though different in their specific applications, also benefit from the screw’s robust design and precision, ensuring that these engines perform reliably under demanding conditions.

Role of Part 3906376 Hexagon Head Cap Screw in Engine Systems

The part 3906376 is instrumental in ensuring the secure assembly and operation of various engine components. Its primary function is to provide a reliable fastening solution that can withstand the dynamic forces and vibrations inherent in engine operation.

Integration with the Balancer

In the context of an engine balancer, the Hexagon Head Cap Screw plays a significant role in attaching the balancer to the crankshaft. This connection is essential for maintaining the balancer’s position and ensuring it functions correctly to counteract the vibrations produced by the engine’s moving parts. The screw’s hexagonal head allows for efficient torque application, ensuring a tight and secure fit that can endure the operational stresses.

Application in the Engine Assembly

Within the broader engine assembly, the Hexagon Head Cap Screw is utilized in multiple applications. It is commonly employed to fasten engine covers, attach sensor brackets, and secure various mounting points. These applications require a fastening solution that offers both strength and ease of installation, attributes that the Hexagon Head Cap Screw delivers effectively.

Use in the Engine Balancer System

When considering the engine balancer system, the Hexagon Head Cap Screw is often used to secure the balancer weights and other components that contribute to the system’s overall effectiveness. The screw’s design ensures that these components remain firmly in place, allowing the balancer to perform its function of reducing engine vibrations and enhancing smoothness.

Conclusion

In summary, the part 3906376 is a versatile and reliable component in engine systems, providing the necessary fastening power to ensure the integrity and performance of critical engine components.