4940675
Fracture Resistant Screw
Cummins®

Introduction

The 4940675 Fracture-Resistant Screw Assembly is a component manufactured by Cummins, a well-established name in the automotive and heavy-duty truck industry. This screw assembly is designed specifically for commercial truck applications, where durability and reliability are paramount. Its role in ensuring the structural integrity of various truck components under stress is significant, contributing to the overall safety and performance of the vehicle ¹.

Basic Concepts of Fracture-Resistant Screw Assemblies

A Fracture-Resistant Screw Assembly is engineered to withstand significant stress without breaking. Its general purpose in mechanical systems is to secure components together while providing resistance to fracture under load. This is achieved through a combination of material selection, design, and manufacturing processes that enhance the screw’s ability to endure stress without failure. The assembly functions by distributing stress evenly across its structure, minimizing the risk of fracture ².

Purpose and Role in Truck Operation

In the context of commercial trucks, the 4940675 Fracture-Resistant Screw Assembly serves a specific purpose in securing critical components that are subject to high stress and vibration. Its role is to maintain the structural integrity of these components, ensuring that they remain securely fastened under operational conditions. This contributes to the overall operation and reliability of the vehicle by preventing unexpected failures that could lead to downtime or safety hazards ³.

Key Features

The 4940675 Fracture-Resistant Screw Assembly boasts several key features that enhance its performance and durability. It is composed of high-strength materials, which provide the necessary resistance to stress and corrosion. The design elements include a threaded shaft that ensures a secure fit and a head designed for easy installation and removal. Unique characteristics such as a special coating may be applied to further enhance its resistance to environmental factors and wear.

Benefits

Utilizing the 4940675 Fracture-Resistant Screw Assembly offers several benefits. It contributes to improved safety by reducing the risk of component failure under stress. Its enhanced durability means it can withstand the demanding conditions of commercial truck operation. Reduced maintenance needs are another advantage, as its design and material composition are intended to minimize the frequency of replacements or repairs. Over time, this can lead to potential cost savings for fleet operators.

Installation Considerations

When installing the 4940675 Fracture-Resistant Screw Assembly, it is important to follow guidelines and best practices to ensure proper function and longevity. Cummins recommends using specific tools and procedures for installation to avoid damage to the screw or the components it secures. Attention to torque specifications is crucial to ensure the screw is tightened to the correct level, providing the intended level of security without over-tightening, which could lead to damage.

Troubleshooting Common Issues

Common issues with the 4940675 Fracture-Resistant Screw Assembly may include loosening over time due to vibration or corrosion. To address these problems, regular inspections are recommended to identify any signs of wear or loosening. If an issue is detected, the screw should be tightened to the manufacturer’s specifications or replaced if it shows signs of damage or excessive wear.

Maintenance Tips

Regular maintenance of the 4940675 Fracture-Resistant Screw Assembly is key to ensuring its longevity and optimal performance. This includes periodic inspections to check for signs of wear, corrosion, or loosening. Cleaning the screw and its surrounding area can prevent the buildup of dirt and debris that could accelerate wear. Replacement should be considered if the screw shows significant signs of damage or if it has reached the end of its service life, as indicated by the manufacturer’s guidelines.

Cummins: A Brief Overview

Cummins is a renowned manufacturer in the automotive and heavy-duty truck industry, known for its commitment to producing high-quality components. With a rich history and a strong reputation for reliability and innovation, Cummins has established itself as a leader in the field. Their dedication to quality is evident in the design and manufacturing of components like the 4940675 Fracture-Resistant Screw Assembly, which are engineered to meet the demanding requirements of commercial truck applications.

Compatibility with Cummins Engines

The Fracture-Resistant Screw Assembly 4940675 is designed to fit a variety of Cummins engines, ensuring robust and reliable performance. This part is engineered to withstand the rigors of engine operation, providing critical fastening solutions that maintain structural integrity and operational efficiency.

Compatible Engines

• B4.5 CM2350 B129B
• B6.7 CM2670 B153B
• D4.0 CM2620 D103B
• F3.8 CM2350 F120B
• F3.8 CM2350 F128C
• F3.8 CM2620 F137B
• F3.8 F102
• F4.5 CM2620 F139B
• F4.5 CM2620 F141C
• ISB4.5 CM2350 B104
• ISBE4 CM850
• ISF2.8 CM2220 F129
• ISF3.8 CM2220 AN
• ISF3.8 CM2220 F103
• ISF3.8 CM2350 F109
• ISF4.5 CM2220 F123
• ISL9 CM2150 SN
• QSF3.8 CM2350 F107
• QSF3.8 CM2880 F112

This assembly is integral to the secure fastening of various engine components, ensuring that the engine operates smoothly and efficiently. Its compatibility across a wide range of Cummins engines underscores its versatility and importance in maintaining engine performance and longevity.

Role in Engine Systems

The 4940675 Fracture-Resistant Screw Assembly is integral to the secure attachment and reliable operation of various engine components. Specifically, it plays a significant role in the flywheel mounting system.

Flywheel Mounting

In the flywheel mounting system, the 4940675 Fracture-Resistant Screw Assembly ensures that the flywheel is firmly attached to the crankshaft. This secure attachment is essential for the efficient transfer of power from the engine to the transmission. The screw assembly’s fracture-resistant properties are particularly important here, as the flywheel experiences substantial rotational forces and vibrations.

The robust design of the screw assembly helps maintain the integrity of the connection, preventing any potential loosening that could lead to misalignment or failure. This, in turn, ensures smooth engine operation and consistent power delivery.

Additionally, the use of a fracture-resistant screw assembly in the flywheel mounting contributes to the overall durability and reliability of the engine system. It reduces the likelihood of unexpected failures, which can be particularly beneficial in high-stress environments or applications where engine reliability is paramount.

Conclusion

The 4940675 Fracture-Resistant Screw Assembly by Cummins is a critical component in the maintenance of structural integrity and operational efficiency in commercial trucks and Cummins engines. Its design, featuring high-strength materials and a robust construction, ensures durability under stress and vibration. Regular maintenance and proper installation are essential to maximize its benefits, including enhanced safety, reduced maintenance needs, and potential cost savings for fleet operators. Cummins’ reputation for quality and innovation is reflected in this part, making it a reliable choice for securing critical engine components.