4078919
Lock Washer
Cummins®

The Cummins 4078919 Lock Washer is a specialized component designed for use in commercial truck maintenance. Its purpose is to enhance the security of bolted connections, ensuring that fasteners remain tight under various operating conditions. This part is significant in maintaining the integrity and safety of truck components, contributing to the overall reliability and performance of commercial vehicles.

Basic Concepts of Lock Washers

Lock washers are mechanical devices used in fastening systems to prevent screws and bolts from loosening. They operate by applying tension to the fastener, which creates friction and resists the rotational forces that could cause loosening. There are several types of lock washers, including split lock washers, which have a gap that creates a spring effect, and serrated lock washers, which have teeth that dig into the mating surfaces to increase friction ¹.

Purpose of the Cummins 4078919 Lock Washer

This Cummins part plays a specific role in the operation and maintenance of commercial trucks. It is designed to be used in critical bolted connections where vibration and dynamic loads are common. This lock washer is typically employed in the truck’s structure or engine components, such as in the fastening of engine mounts, exhaust systems, and other high-stress areas where maintaining a secure connection is vital.

Key Features

The Cummins 4078919 Lock Washer is characterized by several distinctive features that enhance its functionality. It is made from high-quality materials, often steel or stainless steel, to ensure durability and resistance to corrosion. The design includes a split or serrated edge that provides the necessary tension and friction to keep fasteners secure. Additionally, the washer is engineered to withstand the harsh operating conditions typical of commercial truck environments ².

Benefits of Using Lock Washers

Lock washers offer several advantages in fastening applications. They provide improved fastening security by preventing bolts and screws from loosening due to vibration or dynamic loads. This increased security leads to enhanced safety and reliability of the truck’s components. The Cummins 4078919 Lock Washer, in particular, is designed to offer longevity and consistent performance in demanding conditions, reducing the need for frequent maintenance and replacement ³.

Installation Guidelines

Proper installation of this part is crucial for ensuring optimal performance and durability. To install, first, ensure the mating surfaces are clean and free of debris. Place the lock washer under the bolt or screw head, ensuring the split or serrated edge is oriented correctly to apply tension. Tighten the fastener to the manufacturer’s specified torque settings to achieve the desired clamping force without over-tightening, which could damage the washer or fastener.

Troubleshooting Common Issues

Common issues with lock washers include loosening over time, corrosion, and damage from improper installation. To address these problems, regularly inspect lock washers for signs of wear or corrosion. If a lock washer appears damaged or ineffective, it should be replaced promptly. Ensuring correct torque settings during installation can prevent many issues related to fastening security.

Maintenance Tips

Regular maintenance of lock washers is important to prolong their service life and ensure continued fastening security. Inspect lock washers during routine maintenance checks, looking for signs of wear, corrosion, or damage. Replace any lock washers that show signs of deterioration. Additionally, ensure that all fasteners are tightened to the correct specifications to maintain the effectiveness of the lock washers.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration, and power generation products. Founded in 1919, Cummins has built a reputation for innovation, quality, and reliability in the commercial vehicle industry. The company’s extensive product range serves various markets, including heavy-duty trucking, construction, agriculture, and power generation, providing customers with robust and dependable power solutions.

Cummins Engine Lock Washer 4078919 Compatibility

The Lock Washer part number 4078919, manufactured by Cummins, is a critical component designed to ensure secure fastening in various engine applications. This part is compatible with several Cummins engine models, providing stability and reliability in demanding environments.

QSB5.9 CM850 and QSB6.7 M CM2250

The Lock Washer 4078919 is integral to the assembly of the QSB5.9 CM850 and QSB6.7 M CM2250 engines. These engines are known for their robust performance and are often used in heavy-duty applications, including agricultural and construction equipment. The lock washer helps maintain the integrity of bolted connections, preventing loosening due to vibration and thermal expansion.

QSC8.3 CM850(CM2850)

In the QSC8.3 CM850(CM2850) engine, the Lock Washer 4078919 plays a vital role in securing various components. This engine is designed for high-power applications, and the lock washer ensures that critical parts remain tightly fastened, contributing to the engine’s overall durability and efficiency.

QSM11 CM570

The QSM11 CM570 engine also benefits from the use of the Lock Washer 4078919. This engine is typically used in medium-duty applications, and the lock washer’s ability to prevent loosening is essential for maintaining the engine’s operational integrity. Its use in this engine underscores the importance of reliable fastening solutions in ensuring consistent performance.

By incorporating the Lock Washer 4078919 into these engines, Cummins ensures that each model benefits from enhanced stability and longevity, reinforcing the brand’s commitment to quality and reliability.

Role of Part 4078919 Lock Washer in Engine Systems

Part 4078919 Lock Washer is instrumental in maintaining the integrity and efficiency of various engine systems. In the context of accessories, this lock washer ensures that components remain securely fastened, preventing loosening due to vibrations or thermal expansion. This is particularly important in high-stress environments where accessories like alternators, water pumps, and air conditioning compressors are subject to constant movement and temperature fluctuations.

When considering the exhaust outlet, the lock washer plays a significant role in securing the connection between the exhaust manifold and the exhaust pipe. This connection is vital for maintaining the seal and ensuring that exhaust gases are directed away from the engine compartment efficiently. A secure fit prevents leaks, which can lead to decreased engine performance and increased emissions.

In the realm of connections, part 4078919 is often used in plumbing systems within the engine bay. Whether it’s fuel lines, coolant hoses, or brake lines, the lock washer ensures that fittings remain tight, preventing fluid leaks that could compromise engine operation. This is especially important in systems where precise fluid levels and pressures are necessary for optimal performance.

Lastly, at the exhaust outlet connection, the lock washer ensures that the joint between the exhaust manifold and the catalytic converter or muffler remains intact. This is essential for reducing the risk of exhaust leaks, which can not only affect engine performance but also pose safety hazards due to the release of toxic fumes.

Overall, the application of part 4078919 Lock Washer across these components underscores its importance in maintaining the reliability and safety of engine systems.

Conclusion

The Cummins 4078919 Lock Washer is a critical component in the maintenance and operation of commercial trucks and engines. Its design and functionality ensure secure fastening in high-stress environments, contributing to the overall reliability and safety of the vehicle. Proper installation, regular maintenance, and timely replacement of this part are essential practices to ensure the continued performance and longevity of commercial truck components.