4899706
Round Head Cap Screw
Cummins®

Introduction

The Cummins 4899706 Round Head Cap Screw is a specialized fastener designed for use in commercial trucks. Its purpose is to securely join various components within the truck’s structure and engine assembly. This screw is integral to maintaining the structural integrity and operational efficiency of commercial vehicles, ensuring that parts remain firmly in place under the demanding conditions of heavy-duty use ¹.

Basic Concepts of Round Head Cap Screws

Round head cap screws are a type of fastener characterized by a rounded head and a threaded shaft. They are commonly used in mechanical assemblies to secure components together. The rounded head provides a larger surface area for applying torque, which helps in tightening the screw without damaging the surrounding material. These screws function by converting rotational force into axial force, which clamps components together securely ².

Purpose of the Cummins 4899706 Round Head Cap Screw

The Cummins 4899706 Round Head Cap Screw plays a specific role in the operation and maintenance of commercial trucks. It is typically used in areas where high tensile strength and resistance to loosening are required. This includes securing engine components, chassis parts, and other critical areas where vibrations and dynamic loads are present. Its design ensures that components remain securely fastened, contributing to the overall safety and performance of the truck ³.

Key Features

The Cummins 4899706 Round Head Cap Screw is engineered with several key features to enhance its performance and durability. It is made from high-strength materials, often alloy steel, to withstand the rigors of heavy-duty applications. The screw features a coarse thread type, which provides greater resistance to loosening under vibration. Its round head design allows for easy application of torque using standard tools. Additionally, it may have special coatings or treatments, such as zinc plating, to improve corrosion resistance and extend its service life.

Benefits

The Cummins 4899706 Round Head Cap Screw offers several benefits that contribute to the reliability and safety of commercial trucks. Its high tensile strength ensures secure fastening, while its resistance to vibration loosening helps maintain component integrity over time. The corrosion-resistant properties of the screw enhance its durability, especially in harsh operating environments. These features collectively support the overall performance and longevity of the truck.

Installation Considerations

Proper installation of the Cummins 4899706 Round Head Cap Screw is vital to ensure optimal performance and longevity. It is important to follow torque specifications provided by the manufacturer to achieve the correct clamping force without over-tightening, which could damage the screw or the components being fastened. Using the correct tools, such as a torque wrench, is also crucial to apply the appropriate amount of force. Ensuring that the mating surfaces are clean and free of debris will also contribute to a secure and lasting connection.

Troubleshooting and Maintenance

Common issues with round head cap screws in commercial trucks include loosening due to vibration, corrosion, and wear. Regular inspection and maintenance can help identify and address these issues before they lead to more significant problems. If a screw shows signs of corrosion or damage, it should be replaced promptly. Additionally, ensuring that all screws are tightened to the correct torque specification during routine maintenance will help prolong their life and ensure continued secure fastening.

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 provider of high-quality components for the commercial truck industry. The company is committed to innovation and excellence, continually advancing its product offerings to meet the evolving needs of its customers. Cummins’ dedication to quality and performance is evident in its wide range of truck components, including the Cummins 4899706 Round Head Cap Screw.

Cummins Engine Compatibility with Part 4899706

The Round Head Cap Screw, part number 4899706, manufactured by Cummins, is a versatile component that fits into various engine models within the Cummins engine lineup. This part is integral to the assembly and maintenance of these engines, ensuring secure fastening in numerous applications.

B-Series Engines

The B-Series engines, including the B4.5 RGT, B6.7 CM2670 B153B, B6.7 CM2670 B164C, and B6.7 G CMOH6.0 B125, utilize the Round Head Cap Screw in their construction. This screw is essential for securing various components within these engines, ensuring structural integrity and operational efficiency.

ISB Engines

The ISB engines, such as the ISB CM2150, ISB/ISD4.5 CM2150 B119, ISB/ISD6.7 CM2150 SN, and ISB6.7 CM2250, also incorporate the part 4899706. This screw is used in multiple applications across these models, facilitating the assembly of engine parts and ensuring reliable fastening.

ISBE Engines

The ISBE engines, including the ISBE CM2150, ISBE CM800, and ISBE4 CM850, feature the Round Head Cap Screw in their design. This component is critical for maintaining the structural integrity of these engines, providing secure fastening for various engine components.

ISD Engines

The ISD engines, such as the ISD4.5 CM2220 D108, incorporate the part 4899706 in their assembly. This screw is essential for ensuring the secure fastening of components within these engines, contributing to their overall reliability and performance.

ISF Engines

The ISF3.8 CM2220 AN engine utilizes the Round Head Cap Screw in its construction. This part is crucial for maintaining the structural integrity of the engine, providing secure fastening for various components.

QSB Engines

The QSB engines, including the QSB4.5 CM2250 EC, QSB4.5 CM850 (CM2850), QSB6.7 CM2250, QSB6.7 CM850 (CM2850), QSB6.7 M CM2250, and QSB7 CM2880 B117, all feature the part 4899706. This screw is integral to the assembly and maintenance of these engines, ensuring secure fastening in numerous applications.

This comprehensive compatibility of the Round Head Cap Screw across various Cummins engine models underscores its importance in maintaining the structural integrity and operational efficiency of these engines.

Role of Part 4899706 Round Head Cap Screw in Engine Systems

The 4899706 Round Head Cap Screw is a fundamental component in the assembly and maintenance of various engine systems. Its application spans across multiple critical areas, ensuring the integrity and functionality of the engine.

Breather System

In the breather system, the 4899706 Round Head Cap Screw is utilized to secure components that manage the ventilation of the crankcase. This screw ensures that the breather elements are firmly attached, allowing for effective pressure regulation and the release of contaminants from the engine’s internal environment.

Crankcase Assembly

Within the crankcase, this screw plays a role in attaching covers and plates that protect the rotating crankshaft and connecting rods. Its secure fitment is essential for maintaining the structural integrity of the crankcase, preventing oil leaks, and ensuring smooth operation of the internal components.

Wiring Harnesses

For the electronic control module (ECM) wiring harness and engine control wiring harness, the 4899706 Round Head Cap Screw is employed to fasten mounting brackets and secure wiring looms. This ensures that the electrical connections remain stable and protected from vibrations, which is vital for the reliable operation of the engine’s electronic systems.

Lever and Rocker Mechanisms

In lever and rocker mechanisms, such as those found in valvetrain systems, the screw is used to attach pivot points and adjustment components. This secure attachment is necessary for precise valve operation, contributing to the engine’s overall performance and efficiency.

Manifold and Air Intake Systems

The screw is also integral in the manifold and air intake systems, where it is used to fasten components that direct air flow into the engine. Proper securing of these parts ensures optimal air-fuel mixture and combustion efficiency, directly influencing the engine’s power output and emissions.

Conclusion

In summary, the 4899706 Round Head Cap Screw is a versatile component that enhances the reliability and performance of various engine systems through its secure and stable fastening capabilities. Its high tensile strength, resistance to vibration loosening, and corrosion-resistant properties make it an essential part in the maintenance and operation of commercial trucks and Cummins engines.