3558798
Hexagon Head Cap Screw
Cummins®

Introduction

The Cummins 3558798 Hexagon Head Cap Screw is a specialized fastener designed for use in commercial trucks. It is engineered to meet the rigorous demands of heavy-duty applications, ensuring reliable performance and durability. This screw plays a significant role in securing various components within the truck, contributing to the overall integrity and functionality 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. These screws are commonly used in mechanical assemblies to secure components together. The hexagonal shape of the head provides a stable and secure grip, reducing the risk of slippage during installation or removal. In commercial trucks, these screws are vital for maintaining the structural integrity of various parts ¹.

Purpose and Role in Truck Operation

The Cummins 3558798 Hexagon Head Cap Screw is specifically designed to play a role in the operation and maintenance of commercial trucks. It is used in areas where high strength and resistance to vibration are required, such as in the engine compartment, chassis, and other critical components. By securely fastening these parts, the screw helps ensure that the truck operates smoothly and safely under demanding conditions ².

Key Features

The Cummins 3558798 Hexagon Head Cap Screw boasts several key features that enhance its functionality. It is made from high-quality materials, typically a durable alloy steel, which provides excellent strength and corrosion resistance. The screw features a coarse thread type, which allows for quick and secure fastening. Additionally, its design includes a hexagonal head for easy installation and removal using standard tools.

Benefits

Using the Cummins 3558798 Hexagon Head Cap Screw offers several benefits. Its durable material composition ensures long-lasting performance, even in harsh operating environments. The screw’s resistance to vibration helps maintain a secure connection over time, reducing the need for frequent re-tightening. Furthermore, the ease of installation and removal simplifies maintenance procedures, saving time and effort for technicians ³.

Installation and Usage Guidelines

Proper installation of the Cummins 3558798 Hexagon Head Cap Screw is crucial for ensuring its effectiveness. To install the screw, use a wrench or socket that fits the hexagonal head. Begin by aligning the screw with the designated hole and start threading it in by hand to avoid cross-threading. Once the screw is started, continue tightening it using the appropriate tool. It is important to follow the recommended torque specifications provided by Cummins to achieve the correct tension without over-tightening, which could damage the screw or the components being fastened.

Troubleshooting and Maintenance

Common issues with Hexagon Head Cap Screws include loosening due to vibration and corrosion. To troubleshoot these problems, regularly inspect the screws for signs of wear or damage. If a screw appears loose, re-tighten it to the specified torque. In cases of corrosion, consider replacing the screw to prevent further degradation. Maintaining a clean and dry environment around the screws can also help extend their lifespan.

Safety Considerations

When working with the Cummins 3558798 Hexagon Head Cap Screw, it is important to observe several safety practices. Always wear appropriate personal protective equipment, such as gloves and safety glasses, to protect against injury. Ensure that the work area is well-lit and free of obstacles. Use the correct tools for installation and removal to avoid accidents. Additionally, be mindful of the torque specifications to prevent over-tightening, which could lead to damage or failure of the screw.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established itself as a trusted name in the commercial truck industry. The company is committed to innovation and quality, consistently delivering reliable and high-performance components that meet the needs of its customers. Cummins’ dedication to excellence is evident in its wide range of truck components, including the Cummins 3558798 Hexagon Head Cap Screw.

Cummins Engine Compatibility with Hexagon Head Cap Screw Part 3558798

The Cummins part number 3558798, a Hexagon Head Cap Screw, is a versatile component that fits a variety of Cummins engines. This screw is designed to secure various parts within the engine assembly, ensuring stability and reliability. Below is a detailed overview of the engines that are compatible with this specific part.

Cummins B and C Series Engines

• 4B3.9
• 6B5.9
• B5.9 G
• C GAS PLUS CM556
• C8.3 G

These engines, part of the B and C series, are commonly used in a range of applications, from construction equipment to agricultural machinery. The Hexagon Head Cap Screw 3558798 is integral in securing various engine components, ensuring the engine operates smoothly and efficiently.

Cummins ISB and ISM Engines

• ISB CM550
• ISM CM570
• ISX CM570
• QSB5.9 44 CM550
• QSM11 CM570

The ISB, ISM, and ISX engines are known for their robust performance and reliability. The Hexagon Head Cap Screw 3558798 is used extensively in these engines to maintain the structural integrity of the engine assembly, particularly in areas requiring high torque and durability.

Cummins K and L Series Engines

• K38
• K50
• L10 CELECT
• L10 GAS

The K and L series engines are designed for heavy-duty applications. The Hexagon Head Cap Screw 3558798 plays a crucial role in these engines by providing the necessary fastening for components that are subjected to significant mechanical stress.

Cummins M Series Engines

• M11 CELECT
• M11 CELECT PLUS
• M11 MECHANICAL

The M series engines are known for their versatility and efficiency. The Hexagon Head Cap Screw 3558798 is used in these engines to secure various parts, ensuring that the engine maintains its performance and reliability under different operating conditions.

Cummins N Series Engines

• N14 CELECT PLUS
• N14 MECHANICAL

The N series engines are designed for high-performance applications. The Hexagon Head Cap Screw 3558798 is essential in these engines, providing the necessary fastening for components that require high strength and durability.

Cummins NH/NT Series Engines

• NH/NT 855

The NH/NT series engines are used in a variety of applications, from agricultural to industrial. The Hexagon Head Cap Screw 3558798 is used in these engines to secure various parts, ensuring the engine operates efficiently and reliably.

By understanding the compatibility of the Hexagon Head Cap Screw 3558798 with these Cummins engines, technicians and maintenance personnel can ensure that their engines remain in optimal condition, providing reliable performance for years to come.

Role of Part 3558798 Hexagon Head Cap Screw in Various Engine Systems

Part 3558798, the Hexagon Head Cap Screw, is integral to the assembly and functionality of several components within engine systems. Its application spans across various assemblies and kits, ensuring secure fastening and reliable operation.

Air Compressor and Air Compressor Kit

In the air compressor and air compressor kit, the Hexagon Head Cap Screw is utilized to fasten critical components, ensuring that the assembly remains intact under operational pressures. This screw is particularly important in securing the compressor housing to the base, maintaining alignment and preventing leaks.

QE Unloader Serv and QE/HD Head Serv Assemblies

For the QE Unloader Serv and QE/HD Head Serv assemblies, the Hexagon Head Cap Screw plays a key role in attaching the servo mechanism to the compressor head. This ensures precise control over the unloading process, which is essential for efficient compressor operation and longevity.

Compressor Conversion Kit

In the compressor conversion kit, the screw is used to secure various head assemblies (HD/B, HD/C, HD/M, HD/STD, QE/B, QE/STD) to the compressor body. This secure attachment is vital for converting the compressor to different specifications, ensuring that the new configuration operates smoothly and effectively.

HD and QE Head Assemblies

For the HD/B, HD/C, HD/M, HD/STD, QE/B, and QE/STD head assemblies, the Hexagon Head Cap Screw is employed to fasten the head to the compressor. This secure connection is necessary for maintaining the integrity of the compression chamber, ensuring optimal performance and preventing potential failures.

General Application in Kits

Across all kits (HD/B, HD/C, HD/M, HD/STD, QE/B, QE/STD), the Hexagon Head Cap Screw is a standard component used for fastening various parts. Its consistent application ensures that all assemblies are securely held together, contributing to the overall reliability and efficiency of the engine system.

Conclusion

The Cummins 3558798 Hexagon Head Cap Screw is a critical component in the maintenance and operation of commercial trucks and various engine systems. Its durable construction, ease of use, and compatibility with a wide range of Cummins engines make it an essential part for ensuring the reliability and performance of these vehicles. Proper installation, regular maintenance, and adherence to safety practices are key to maximizing the benefits of this part.