3061511
Captive Washer Cap Screw
Cummins®

The 3061511 Captive Washer Cap Screw, manufactured by Cummins, is a specialized fastener designed for heavy-duty truck applications. This part plays a role in securing various components within the truck’s structure, ensuring both stability and functionality. Cummins, a well-established name in the automotive industry, is known for its commitment to quality and innovation, making this captive washer cap screw a reliable choice for truck manufacturers and maintenance professionals ¹.

Basic Concepts of Captive Washer Cap Screws

A captive washer cap screw is a type of fastener that includes an integrated washer, which remains attached to the screw during installation. This design ensures that the washer does not become misplaced, simplifying the assembly process. The washer serves to provide a sealing surface, which helps to distribute the load and prevent the screw from loosening over time. In mechanical assemblies, captive washer cap screws are commonly used to secure components that require a tight, vibration-resistant connection ².

Purpose and Role in Truck Operation

This Cummins part is specifically designed to meet the demanding requirements of heavy-duty truck applications. It contributes to the structural integrity of truck components by providing a secure fastening solution that resists the effects of vibration and dynamic loads. This screw is often used in areas where maintaining a tight connection is vital for the safe and efficient operation of the truck ³.

Key Features

The 3061511 features a robust design that includes a high-strength material composition, typically a grade of steel that offers excellent durability and resistance to corrosion. The screw has a specific thread type that ensures a strong grip on the mating surface, enhancing its performance in high-stress environments. Additionally, the integrated washer is designed to provide a consistent sealing surface, which is crucial for maintaining the integrity of the connection.

Benefits

Using the 3061511 offers several advantages. The integrated washer enhances the sealing capability of the screw, reducing the risk of leaks in fluid systems. The design of the screw provides resistance to vibration, which is particularly important in the harsh operating conditions of heavy-duty trucks. Furthermore, the captive washer simplifies the installation process, as there is no need to handle separate washers, reducing the likelihood of errors during assembly.

Installation Process

To install the 3061511, begin by ensuring that the mating surface is clean and free of debris. Use the appropriate tool, such as a torque wrench, to drive the screw into the designated hole. It is important to apply the correct amount of torque to achieve a secure connection without over-tightening, which could damage the screw or the surrounding material. Follow the manufacturer’s guidelines for torque specifications to ensure proper installation.

Troubleshooting Common Issues

Common issues with captive washer cap screws include loosening over time and corrosion. To address loosening, periodically check the tightness of the screws and re-tighten as necessary using a torque wrench. If corrosion is present, it may be necessary to replace the screw to maintain a secure connection. Ensuring that the screw is made from a corrosion-resistant material can help prevent this issue.

Maintenance Tips

To ensure the longevity and reliable performance of the 3061511, regular maintenance is recommended. This includes periodic checks to ensure that the screws remain tight and have not loosened due to vibration. Additionally, inspecting the screws for signs of corrosion or damage can help identify potential issues before they lead to failure. Following these maintenance practices will help maintain the integrity of the truck’s components.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including diesel and natural gas engines, as well as related technologies. With a history spanning over a century, Cummins has established itself as a trusted name in the automotive industry, known for its expertise in engine manufacturing and commitment to quality and innovation. The company’s products are designed to meet the rigorous demands of various applications, from heavy-duty trucks to industrial equipment.

Captive Washer Cap Screw (Part 3061511) in Cummins Engines

The Captive Washer Cap Screw, identified by part number 3061511, is a component in the assembly and maintenance of several Cummins engines. This part is designed to secure various engine components, ensuring they remain tightly fastened and properly aligned during operation.

QSK45 CM500 and QSK60 CM500

In the QSK45 CM500 and QSK60 CM500 engines, the Captive Washer Cap Screw is utilized in several key areas. These engines, known for their robust performance and reliability, often require precise fastening solutions to maintain their operational integrity. The 3061511 part is typically employed in securing engine covers, brackets, and other structural components that are essential for the engine’s overall stability and efficiency.

QSK50 CM2350 K108

The QSK50 CM2350 K108 engine also benefits from the use of the Captive Washer Cap Screw. This engine, part of Cummins’ high-performance lineup, demands components that can withstand significant stress and vibrations. The 3061511 part is strategically placed in areas where it must ensure the secure attachment of critical engine parts, contributing to the engine’s durability and longevity.

Common Usage Across Engines

Across these engines, the Captive Washer Cap Screw serves a pivotal role in maintaining the structural integrity of the engine. Its design, which includes a captive washer, ensures that the screw remains in place even under high-stress conditions, preventing loosening and potential engine failure. This part is integral to the assembly process, providing a reliable fastening solution that is essential for the smooth operation of the engine.

Role of Part 3061511 Captive Washer Cap Screw in Engine Systems

The 3061511 is integral to the assembly and securement of various engine components, ensuring the integrity and functionality of the engine system.

In the breather system, this screw plays a role in securing the breather cover, allowing for the release of pressure and contaminants from the crankcase while preventing the escape of oil vapors.

For the EBM (Engine Breather Module) cover, the screw ensures a tight seal, which is essential for maintaining the efficiency of the breather system and preventing oil contamination.

In conjunction with the valve components, the 3061511 screw is used to secure valve covers or related housings, ensuring that the valves operate within a sealed environment, which is vital for engine performance.

The fuel control module often requires secure mounting to ensure accurate fuel delivery and management. The Captive Washer Cap Screw aids in this by providing a reliable fastening solution.

In kits such as the 3-port LG M/U (Large Mixer Unit) tank, LG M/U tank, and SM M/U (Small Mixer Unit) tank, the screw is employed to assemble and secure the tank components, ensuring they remain intact under operational conditions.

The oil replenishing system relies on secure connections to maintain oil levels accurately. The 3061511 screw helps in fastening components that are part of this system, ensuring no leaks occur.

Lastly, in the rocker housing mounting cover, the screw is used to secure the cover, which houses the rocker arms. This ensures that the rocker arms are properly supported and aligned, contributing to the overall valve train efficiency.

Conclusion

The 3061511 Captive Washer Cap Screw is a critical component in the assembly and maintenance of Cummins engines, particularly in heavy-duty truck applications. Its robust design, resistance to vibration, and integrated washer make it a reliable fastening solution that ensures the structural integrity and efficient operation of engine components. Regular maintenance and proper installation are essential to maximize the performance and longevity of this part.