3066287
Captive Washer Cap Screw
Cummins®

The Cummins 3066287 Captive Washer Cap Screw is a specialized fastener designed for use in heavy-duty truck applications. Its purpose is to maintain the integrity of various truck components by providing a secure and reliable fastening solution. This screw is integral to ensuring that critical parts remain firmly in place, contributing to the overall performance and safety of commercial trucks ².

Basic Concepts of Captive Washer Cap Screws

A captive washer cap screw is a type of fastener that includes an integrated washer, which is held in place by a slot or groove in the screw’s shank. This design ensures that the washer remains attached to the screw during installation, reducing the risk of loss and simplifying the fastening process. In the automotive industry, these screws are commonly used to secure components that require a high level of reliability and durability, such as engine parts, chassis components, and various structural elements ¹.

Purpose and Role in Truck Operation

The Cummins 3066287 Captive Washer Cap Screw plays a significant role in the operation and maintenance of commercial trucks. It is used to secure critical components, ensuring that they remain in place under various operating conditions. This screw helps maintain structural integrity by providing a strong and consistent fastening solution, which is vital for the safe and efficient operation of heavy-duty trucks. Its application in securing engine mounts, chassis parts, and other critical areas underscores its importance in truck maintenance ².

Key Features

The Cummins 3066287 Captive Washer Cap Screw boasts several key features that enhance its performance and durability. Its design includes an integrated washer that is held securely in place by a slot in the screw’s shank, ensuring that the washer does not become detached during installation. The screw is made from high-quality materials, such as hardened steel, which provides excellent resistance to wear and corrosion. Additionally, the screw features a hexagonal head for easy installation using standard tools, and its thread design ensures a strong and secure hold ¹.

Benefits

Using the Cummins 3066287 Captive Washer Cap Screw offers several benefits for fleet operators. The integrated washer design simplifies the installation process, reducing the risk of washer loss and ensuring consistent fastening performance. The high-quality material composition enhances the screw’s durability, leading to improved reliability and reduced maintenance requirements. Additionally, the ease of installation and long-term performance contribute to cost savings for fleet operators, making it a valuable component for heavy-duty truck applications ².

Installation Process

Proper installation of the Cummins 3066287 Captive Washer Cap Screw involves several steps to ensure a secure and reliable fastening solution. Begin by cleaning the installation area to remove any dirt or debris that could affect the screw’s performance. Use a torque wrench to install the screw, applying the recommended torque specification to achieve the proper tension without over-tightening. Ensure that the screw is aligned correctly with the fastening hole to prevent cross-threading. Finally, double-check the installation to confirm that the screw is securely in place and the integrated washer is properly positioned ¹.

Troubleshooting and Maintenance

Regular maintenance and troubleshooting are important for ensuring the continued performance of the Cummins 3066287 Captive Washer Cap Screw. Inspect the screw periodically for signs of wear or corrosion, and replace it if any damage is detected. Lubricating the screw and washer can help maintain smooth operation and prevent seizing. If the screw becomes difficult to remove or install, it may indicate a problem with the fastening hole or surrounding components, which should be addressed promptly to avoid further issues ².

Common Applications

The Cummins 3066287 Captive Washer Cap Screw is versatile and finds common applications in various heavy-duty truck systems. It is used to secure engine mounts, chassis components, and other critical parts that require a strong and reliable fastening solution. Its ability to maintain structural integrity and simplify the installation process makes it a valuable component across different truck systems, contributing to the overall performance and safety of commercial trucks ¹.

Manufacturer Overview - Cummins

Cummins Inc. is a renowned manufacturer in the automotive industry, known for its commitment to quality and innovation in engine and component manufacturing. With a rich history of providing reliable and high-performance solutions, Cummins has established a strong reputation for producing durable and efficient parts. The company’s dedication to research and development ensures that its products meet the demanding requirements of heavy-duty applications, making Cummins a trusted name in the industry ².

Captive Washer Cap Screw 3066287 in Cummins Engines

The Captive Washer Cap Screw 3066287, manufactured by Cummins, is a crucial component in several of their engine models. This part is integral to the assembly and operation of these engines, ensuring secure fastening and stability.

G855 and K19 Engines

In the G855 and K19 engines, the Captive Washer Cap Screw 3066287 is used to secure various components, maintaining the integrity of the engine’s structure. Its design ensures that the washer remains captive, preventing it from being lost during assembly or maintenance.

N14 CELECT PLUS and N14 MECHANICAL Engines

For the N14 CELECT PLUS and N14 MECHANICAL engines, this cap screw plays a vital role in fastening parts that require precise alignment and stability. The captive washer feature ensures that the screw remains securely in place, reducing the risk of loosening over time.

QSK19 CM500 and QSK19G Engines

In the QSK19 CM500 and QSK19G engines, the Captive Washer Cap Screw 3066287 is utilized in critical areas where high strength and reliability are paramount. Its design helps in maintaining the structural integrity of the engine, ensuring that all fastened components remain securely in position.

Role of Part 3066287 Captive Washer Cap Screw in Engine Systems

The Part 3066287 Captive Washer Cap Screw is instrumental in securing various components within engine systems, ensuring stability and proper function. Its applications span across multiple assemblies, contributing to the overall integrity and performance of the engine.

Connection and Mounting

In the context of engine assemblies, the Captive Washer Cap Screw is utilized in the water outlet mounting to firmly attach the water outlet to the engine block. This secure connection is vital for maintaining the coolant flow pathway, which is essential for engine temperature regulation.

Similarly, for the thermostat housing mounting cover and thermostat top level assembly housing, the screw ensures that these components are tightly fastened to their respective positions. This not only prevents leaks but also ensures that the thermostat can operate within its designed parameters, contributing to efficient engine cooling.

Securing Dynamic Components

The screw plays a significant role in the fan hub mounting by securing the fan hub to the drive mechanism. This connection is fundamental for the fan’s operation, as it allows for the efficient dissipation of heat from the radiator, maintaining optimal engine operating temperatures.

Additionally, in the damper guard and front engine guard assemblies, the Captive Washer Cap Screw is used to attach these guards to the engine housing. These guards are essential for protecting internal components from debris and external elements, thereby prolonging the engine’s lifespan.

Integration with Heat Exchangers

Within the heat exchanger assembly, the screw is employed to secure various components that facilitate heat transfer between the engine coolant and the ambient air. This secure attachment is necessary for the exchanger to function effectively, ensuring that the engine remains within its optimal temperature range.

Assembly and Package Integrity

The screw is also pivotal in the thermostat (top level assembly) housing and the overall thermostat housing package. By ensuring these components are securely fastened, the screw contributes to the assembly’s structural integrity, which is essential for the reliable operation of the thermostat and, by extension, the engine’s cooling system.

Conclusion

In summary, the Part 3066287 Captive Washer Cap Screw is a versatile fastener that enhances the stability and functionality of various engine components. Its role in securing connections, mounting dynamic components, and integrating with heat exchangers underscores its importance in maintaining engine performance and longevity.

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