108039
Hexagon Head Cap Screw
Cummins®

Introduction

The Cummins Hexagon Head Cap Screw, part number 108039, is a specialized fastener designed for use in commercial truck maintenance and operation. This part plays a significant role in securing various components within the truck’s mechanical assemblies, ensuring both functionality and reliability. Understanding its purpose and significance is vital for maintaining the operational integrity 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. They function by providing a strong, stable connection that can withstand significant stress and vibration, which is particularly important in heavy-duty applications like commercial trucks ¹.

Purpose and Role in Truck Operation

The 108039 Hexagon Head Cap Screw is specifically designed to meet the demanding requirements of commercial truck operation. It secures critical components within the truck’s engine and chassis, contributing to the overall functionality and reliability of these parts. By providing a robust connection, this screw helps ensure that components remain securely in place, even under the harsh conditions encountered in commercial trucking ².

Key Features

The 108039 Hexagon Head Cap Screw features a design that enhances its performance in heavy-duty applications. It is constructed from high-strength materials, ensuring durability and resistance to wear. The screw’s hexagonal head allows for easy installation and removal, while its design minimizes the risk of loosening over time. Additionally, the screw may include features such as a corrosion-resistant coating to enhance its longevity in various operating environments ³.

Benefits

Using the 108039 Hexagon Head Cap Screw offers several benefits. Its high-strength material composition provides improved durability, making it suitable for the rigors of commercial truck operation. The screw’s design also offers resistance to loosening, ensuring that connections remain secure over time. Furthermore, the hexagonal head facilitates ease of installation and removal, allowing for efficient maintenance and repair procedures ⁴.

Installation and Usage

Proper installation of the 108039 Hexagon Head Cap Screw is crucial for ensuring its effectiveness. It is recommended to use the appropriate tools, such as a wrench or socket, to achieve the correct torque specifications. Following the manufacturer’s guidelines for torque values helps prevent over-tightening or under-tightening, which can compromise the screw’s performance and the integrity of the connection.

Troubleshooting and Maintenance

Common issues with the 108039 Hexagon Head Cap Screw may include loosening or corrosion. Regular inspection and maintenance can help identify and address these problems early. If loosening is detected, re-tightening the screw to the specified torque value is recommended. In cases of corrosion, cleaning the screw and applying a corrosion-resistant coating can help restore its performance and prevent further degradation.

Cummins Overview

Cummins Inc. is a renowned manufacturer in the commercial truck industry, with a history of producing high-quality engines and components. The company’s product range includes a variety of parts designed to enhance the performance and reliability of commercial trucks. Cummins is known for its commitment to innovation and excellence, making its products, such as the 108039 Hexagon Head Cap Screw, a trusted choice for truck maintenance and operation.

Hexagon Head Cap Screw 108039 in Cummins Engines

The Cummins Hexagon Head Cap Screw part number 108039 is a critical component in several Cummins engine models. This part is designed to provide secure fastening in various engine applications, ensuring the integrity and reliability of the engine’s structure.

N14 MECHANICAL

In the N14 MECHANICAL engine, the 108039 screw is utilized in several key areas. It is often found securing the cylinder head to the engine block, ensuring a tight seal and preventing leaks. Additionally, it is used in various other applications throughout the engine, including fastening components of the fuel injection system and other critical assemblies.

NH/NT 855

The NH/NT 855 engine also incorporates the 108039 screw in its design. This screw is essential for securing the cylinder head, maintaining the structural integrity of the engine. Furthermore, it is used in fastening various engine components, ensuring that all parts remain securely in place under the high stress and varying conditions of engine operation.

QSK19 CM850 MCRS

In the QSK19 CM850 MCRS engine, the 108039 screw plays a vital role in maintaining the engine’s structural integrity. It is used to secure the cylinder head, ensuring a proper seal and preventing any potential leaks. Additionally, this screw is employed in fastening other critical components within the engine, contributing to the overall reliability and performance of the engine.

Role of Part 108039 Hexagon Head Cap Screw in Engine Systems

Part 108039, the Hexagon Head Cap Screw, is integral to the assembly and functionality of various engine components. Its application spans across multiple systems, ensuring secure fastening and reliable operation.

Aftercooler Water Plumbing

In the aftercooler water plumbing system, the Hexagon Head Cap Screw is used to secure fittings and connections. This ensures a leak-free system, maintaining the efficiency of the aftercooler in reducing the temperature of compressed air.

Charge Air Bypass Plumbing

For the charge air bypass plumbing, this screw plays a role in attaching bypass valves and pipes. Proper fastening is essential to prevent air leaks, which could otherwise affect engine performance and efficiency.

Connection Water Header and Cover Water Header

Both the connection water header and cover water header rely on the Hexagon Head Cap Screw to ensure a tight seal. This is vital for maintaining water flow and pressure within the cooling system, directly impacting engine temperature regulation.

Fuel Check Valve Mounting and Fuel Drain Tube

In fuel systems, the screw is employed in mounting fuel check valves and securing fuel drain tubes. This ensures that fuel flow is consistent and that any excess fuel is safely drained, contributing to the overall reliability of the fuel system.

Fuel Plumbing and Fuel Tubing

The Hexagon Head Cap Screw is also critical in fuel plumbing and tubing assemblies. It secures connections and fittings, ensuring that fuel lines remain intact under pressure, which is essential for consistent fuel delivery to the engine.

Mechanical Governor

In mechanical governor systems, the screw is used to attach various components, ensuring that the governor operates smoothly and accurately controls engine speed.

Oil Cooler Water Plumbing

For oil cooler water plumbing, the screw secures connections that are vital for maintaining the flow of cooling water through the oil cooler, thus ensuring optimal oil temperature and engine lubrication.

Torque Converter Cooling

In torque converter cooling systems, the Hexagon Head Cap Screw is used to fasten components that facilitate the flow of cooling fluid. This is important for dissipating heat generated by the torque converter, enhancing durability and performance.

Tube and Mounting Bayonet and Tube Mounting

The screw is utilized in securing tube and mounting bayonets as well as general tube mountings. This ensures that all tubes are firmly in place, preventing disconnections and leaks that could compromise system integrity.

Water Manifold and Water Header Cover

Finally, in water manifolds and water header covers, the Hexagon Head Cap Screw ensures that all components are tightly sealed. This is fundamental for maintaining water flow and pressure throughout the engine’s cooling system.

Conclusion

The Cummins Hexagon Head Cap Screw, part number 108039, is a vital component in the maintenance and operation of commercial trucks. Its robust design, high-strength material, and ease of installation make it an essential part for securing various engine and chassis components. Proper installation, regular maintenance, and understanding its role in different engine systems are crucial for ensuring the reliability and performance of commercial trucks.