3863143
Hexagon Head Cap Screw
Cummins®

Introduction

The Cummins 3863143 Hexagon Head Cap Screw is a specialized fastener designed for use in heavy-duty truck maintenance and operation. This screw is integral to ensuring the secure assembly of various truck components, contributing to the overall reliability and performance of the vehicle.

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 design of the screw includes a threaded shaft that engages with the internal threads of a mating part, creating a secure connection. These screws are commonly used in applications requiring strong, permanent fastening ¹.

Purpose of the Cummins 3863143 Hexagon Head Cap Screw

This Cummins part plays a significant role in the operation and maintenance of heavy-duty trucks. It is utilized in various truck components, including engine assemblies, transmission systems, and chassis structures. The screw ensures that critical parts remain securely fastened, which is vital for the safe and efficient operation of the truck.

Key Features

This part is crafted 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 reliable fastening. The hexagonal head design allows for easy installation and removal using standard tools, enhancing convenience during maintenance procedures.

Benefits

Using this Cummins part offers several advantages. Its durable material composition ensures long-lasting performance even under demanding conditions. The reliable fastening provided by the coarse thread type reduces the risk of loosening over time. Additionally, the hexagonal head design allows for straightforward installation and removal, making it a practical choice for heavy-duty truck applications.

Installation Guidelines

Proper installation of this part is crucial for ensuring secure fastening. Begin by cleaning the mating surfaces to remove any debris or contaminants. Use a wrench or socket to tighten the screw to the specified torque, which ensures the correct clamping force without over-tightening. It is recommended to follow a star pattern for tightening multiple screws to achieve even distribution of clamping force.

Troubleshooting and Maintenance

Common issues with Hexagon Head Cap Screws include loosening due to vibration or corrosion. Regular inspection and re-tightening can help address these issues. If corrosion is detected, cleaning the affected area and applying a corrosion-resistant coating can prolong the lifespan of the screw. Proper maintenance practices, such as keeping the screw and mating surfaces clean and free of contaminants, will ensure continued reliable performance.

Cummins Overview

Cummins Inc. is a renowned manufacturer of diesel engines and related technologies, with a strong reputation for producing high-quality components. The company has a long history of innovation and excellence in the automotive and heavy-duty truck industries. Cummins’ commitment to quality is evident in its fasteners, such as the 3863143 Hexagon Head Cap Screw, which are designed to meet the rigorous demands of heavy-duty applications ².

Hexagon Head Cap Screw 3863143 in Cummins Engines

The Cummins part number 3863143, a Hexagon Head Cap Screw, is a critical component in several Cummins engine models. This screw is integral to the assembly and maintenance of various engine parts, ensuring structural integrity and operational efficiency.

B3.3 Series Engines

The B3.3 series engines, including the B3.3, QSB3.3 CM2150, and QSB3.3 CM2250 EC, utilize the 3863143 screw in several applications. This screw is often used in securing engine components, such as the cylinder head, to the engine block, ensuring a tight and reliable seal.

QSB4.5 Series Engines

In the QSB4.5 series, which includes the QSB4.5 CM2250 EC and QSB4.5 CM850 (CM2850), the 3863143 screw is employed in similar roles. Its use in these engines extends to fastening various engine parts, contributing to the overall stability and performance of the engine.

QSB6.7 Series Engines

The QSB6.7 series engines, such as the QSB6.7 CM2250 and QSB6.7 CM850 (CM2850), also incorporate the 3863143 screw. This screw is essential in securing larger and more complex components within these engines, ensuring that all parts remain firmly in place under operational stresses.

QSB7 Series Engines

In the QSB7 series, specifically the QSB7 CM2880 B117, the 3863143 screw is used in critical applications. Given the size and power of these engines, the screw’s role in maintaining structural integrity is even more pronounced, ensuring that all components are securely fastened and aligned.

The use of the 3863143 Hexagon Head Cap Screw across these Cummins engine models highlights its importance in maintaining the structural integrity and operational efficiency of the engines.

Role of Part 3863143 Hexagon Head Cap Screw in Engine Systems

The Part 3863143 Hexagon Head Cap Screw is instrumental in securing various components within engine systems, ensuring stability and proper function. In the context of alternator mounting, this screw plays a significant role in attaching the alternator to the engine block or bracket. Its hexagonal head allows for efficient tightening and loosening using a socket wrench, which is essential during installation and maintenance procedures.

When it comes to general mounting applications, the Part 3863143 screw provides a reliable fastening solution. It is often used to secure brackets, sensors, and other auxiliary components to the engine block or chassis. This ensures that these parts remain in place under the dynamic conditions of engine operation, contributing to the overall integrity and performance of the engine system.

Conclusion

In summary, the Part 3863143 Hexagon Head Cap Screw is a versatile fastener that enhances the structural stability and operational reliability of engine components, particularly in alternator and general mounting applications. Its use in various Cummins engine models underscores its importance in maintaining the structural integrity and operational efficiency of these engines.