4988819
Round Head Cap Screw
Cummins®

Introduction

The Round Head Cap Screw 4988819 is a specialized fastener produced by Cummins, a leading manufacturer in the commercial truck industry. This screw is designed for use in various applications within commercial trucks, where it plays a significant role in securing components and ensuring the integrity of mechanical assemblies.

Basic Concepts of Round Head Cap Screws

A Round Head Cap Screw is a type of fastener characterized by its rounded head and threaded shaft. It is commonly used in mechanical assemblies to secure components together. The rounded head provides a larger surface area for distribution of clamping force, reducing the risk of damage to the fastened material. Additionally, the head design allows for easy installation and removal using common tools, making it a versatile choice for a wide range of applications ¹.

Purpose of the 4988819 Round Head Cap Screw in Truck Operation

This Cummins part is integral to the operation and maintenance of commercial trucks. It is utilized in various truck systems, including the engine, transmission, and chassis, where it secures critical components. Its role in these systems ensures that parts remain firmly in place, contributing to the overall stability and performance of the truck. Proper use of this screw helps maintain the alignment and functionality of truck components, which is vital for safe and efficient operation ².

Key Features

The 4988819 Round Head Cap Screw boasts several key characteristics that enhance its functionality in heavy-duty applications. It is made from high-strength materials, ensuring durability under demanding conditions. The screw features a specific thread type that provides optimal grip and resistance to loosening. Its rounded head design not only facilitates easy installation but also distributes clamping force effectively across the fastened material. Additionally, the screw may have unique attributes such as corrosion resistance coatings, further enhancing its suitability for use in commercial trucks ³.

Benefits

Utilizing the 4988819 Round Head Cap Screw offers several advantages. Its durability ensures long-lasting performance, reducing the need for frequent replacements. The screw’s resistance to corrosion makes it suitable for use in various environmental conditions, enhancing the longevity of truck components. Ease of installation is another benefit, allowing for efficient assembly and maintenance processes. These attributes contribute to the overall performance and reliability of commercial trucks.

Installation and Usage Guidelines

Proper installation of the 4988819 Round Head Cap Screw is crucial for ensuring secure fastening. Begin by selecting the appropriate size and type of screw for the application. Use a torque wrench to apply the recommended torque specifications, ensuring that the screw is tightened to the manufacturer’s guidelines. It is important to avoid over-tightening, which can damage the screw or the fastened material. Follow best practices for installation, such as using a washer under the screw head to distribute clamping force and prevent damage to the surface.

Troubleshooting and Maintenance

Common issues associated with Round Head Cap Screws include loosening and corrosion. Regular inspection of screws can help identify problems early, allowing for timely maintenance or replacement. If a screw appears loose, it should be re-tightened to the recommended torque specifications. In cases of corrosion, cleaning the affected area and applying a corrosion-resistant coating can help prolong the lifespan of the screw. Adhering to maintenance tips ensures reliable performance and extends the service life of the screw.

Cummins: A Brief 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 a reputation for quality and innovation in the commercial truck industry. The company offers a wide range of products, including engines, powertrains, and aftermarket parts, designed to meet the demanding requirements of commercial vehicles. Cummins’ commitment to excellence is evident in its focus on research and development, ensuring that its products deliver superior performance and reliability.

Cummins Round Head Cap Screw 4988819 in Engine Applications

The Cummins Round Head Cap Screw, part number 4988819, is a critical component in the assembly and maintenance of several Cummins engine models. This screw is designed to provide secure fastening in various engine applications, ensuring that components remain tightly secured under operational stresses.

ISB CM850 and QSB5.9 CM850 Engines

In the ISB CM850 and QSB5.9 CM850 engines, the 4988819 screw is utilized in multiple locations throughout the engine assembly. These engines, known for their robust performance and reliability, require precise and durable fastening solutions to maintain their structural integrity and operational efficiency.

The 4988819 screw is often employed in securing engine covers, brackets, and other critical components. Its design ensures that these parts remain firmly in place, preventing any potential loosening or misalignment that could affect engine performance or lead to mechanical failures.

Common Applications

• Engine Covers: The 4988819 screw is used to secure various engine covers, ensuring that they are tightly fastened to protect internal components from contaminants and environmental factors.
• Mounting Brackets: This screw is also used in mounting brackets, providing a stable connection that can withstand the vibrations and stresses encountered during engine operation.
• Component Fastening: Beyond covers and brackets, the screw is used in a variety of other fastening applications within the engine, ensuring that all parts are securely attached and properly aligned.

The use of the 4988819 screw in these engines underscores its importance in maintaining the overall reliability and performance of the ISB CM850 and QSB5.9 CM850 engines. Its design and material properties make it an ideal choice for the demanding conditions these engines operate under.

Role of Part 4988819 Round Head Cap Screw in Engine Systems

The 4988819 Round Head Cap Screw is integral to the assembly and maintenance of various engine components. Its primary function is to provide secure fastening, ensuring that parts remain firmly in place under the demanding conditions of engine operation.

Camshaft Assembly

In the camshaft assembly, the 4988819 Round Head Cap Screw is used to fasten the camshaft to the engine block or cylinder head. This secure attachment is vital for maintaining the precise alignment and operation of the camshaft, which controls the opening and closing of the engine’s valves.

Fuel Line Kit Installation

When installing a fuel line kit, the 4988819 Round Head Cap Screw plays a role in securing the fuel lines to the engine block or fuel rail. This ensures a stable and leak-free connection, which is essential for the consistent delivery of fuel to the engine’s combustion chambers.

Injector Fuel Supply Tube

For the injector fuel supply tube, the 4988819 Round Head Cap Screw is employed to fasten the tube to the fuel rail. This secure connection ensures that the fuel supply tube remains in the correct position, allowing for accurate fuel metering and delivery to the injectors.

Injector Plumbing

In injector plumbing, the 4988819 Round Head Cap Screw is used to secure various components such as fittings, brackets, and adapters. This ensures that the injector plumbing system remains intact and functions correctly, contributing to the overall efficiency and performance of the fuel injection system.

Performance Parts

For performance parts, such as upgraded camshafts, fuel rails, or custom intake manifolds, the 4988819 Round Head Cap Screw provides the necessary fastening strength. This ensures that these high-performance components are securely mounted, allowing them to operate under increased stress and power output without failure.

The 4988819 Round Head Cap Screw, through its reliable fastening capabilities, contributes significantly to the integrity and performance of these engine components.

Conclusion

The 4988819 Round Head Cap Screw by Cummins is a critical component in the assembly and maintenance of commercial trucks and engines. Its design, durability, and ease of installation make it an essential fastener for securing various components under demanding conditions. Proper use and maintenance of this screw ensure the reliability and performance of truck and engine systems, contributing to safe and efficient operation.