3067564
Captive Washer Cap Screw
Cummins®

Introduction

The Cummins 3067564 Captive Washer Cap Screw is a specialized fastener designed for use in commercial trucks. Its primary purpose is to provide secure fastening in various truck components, ensuring that parts remain firmly attached under operational conditions. This screw is particularly valued in the trucking industry for its reliability and performance in demanding environments ¹.

Basic Concepts of Captive Washer Cap Screws

Captive washer cap screws are fasteners that incorporate a washer within the screw assembly. This design ensures that the washer remains in place during installation, reducing the risk of loss and ensuring consistent torque application. These screws are commonly used in mechanical assemblies where secure and vibration-resistant fastening is required. The captive washer design enhances the screw’s ability to maintain a tight seal and resist loosening over time, making it ideal for applications in heavy-duty vehicles ².

Purpose and Role in Truck Operation

The Cummins 3067564 Captive Washer Cap Screw plays a significant role in the operation and maintenance of commercial trucks. It is used to secure various components, ensuring that they remain firmly attached despite the vibrations and stresses encountered during truck operation. This screw helps maintain the integrity of truck assemblies, preventing loosening that could lead to component failure or increased wear. Its design contributes to the overall reliability and safety of the vehicle ³.

Key Features

The Cummins 3067564 Captive Washer Cap Screw features a robust design that includes a captive washer integrated into the screw assembly. This design ensures that the washer stays in place, providing consistent performance. The screw is made from high-quality materials, typically steel, which offers excellent strength and durability. Additionally, the screw may feature a corrosion-resistant coating to enhance its longevity in harsh environments. Its unique characteristics include a hex-shaped head for easy installation using standard tools and a threaded shaft that ensures a secure fit in the corresponding nut or tapped hole ⁴.

Benefits

Using the Cummins 3067564 Captive Washer Cap Screw offers several benefits. The integrated washer design enhances fastening security by ensuring even distribution of force and preventing the screw from loosening over time. The screw’s resistance to vibration makes it suitable for use in commercial trucks, where components are subject to constant movement and stress. Additionally, the ease of installation reduces the time required for maintenance tasks, contributing to overall efficiency. The durable construction and corrosion-resistant properties ensure long-lasting performance, minimizing the need for frequent replacements ¹.

Installation Process

Proper installation of the Cummins 3067564 Captive Washer Cap Screw involves several steps to ensure optimal performance. Begin by selecting the appropriate size screw for the application. Use a torque wrench to install the screw, applying the recommended torque specification to avoid over-tightening or under-tightening. Ensure that the screw is aligned correctly with the tapped hole or nut to prevent cross-threading. Finally, double-check the installation to confirm that the screw is secure and the washer is properly seated ².

Troubleshooting and Maintenance

Common issues with captive washer cap screws include loosening due to vibration and corrosion. To address these issues, regularly inspect the screws during maintenance checks. If loosening is detected, re-tighten the screw to the specified torque. In cases of corrosion, consider replacing the screw to prevent further degradation. To prolong the lifespan of the screw, apply a corrosion-resistant lubricant during installation and perform routine inspections to ensure continued reliable performance ³.

Cummins Overview

Cummins Inc. is a leading manufacturer of diesel engines, natural gas engines, and related technologies. Founded in 1919, the company has a long-standing reputation for quality and innovation in the commercial truck industry. Cummins offers a wide range of products, including engines, filtration systems, and aftermarket parts, designed to meet the demanding requirements of heavy-duty applications. The company’s commitment to quality is evident in its rigorous testing and manufacturing processes, ensuring that its components, like the Cummins 3067564 Captive Washer Cap Screw, deliver reliable performance in commercial trucks ⁴.

Application in Cummins Engines

The Captive Washer Cap Screw, identified by part number 3067564, is a crucial component in various Cummins engine models. This part is integral to the assembly and maintenance of the engines, ensuring secure fastening and stability.

N14 CELECT and N14 CELECT PLUS Engines

In the N14 CELECT and N14 CELECT PLUS engines, the Captive Washer Cap Screw is utilized in several critical applications. These engines are known for their robust design and efficiency, often used in heavy-duty applications. The screw helps maintain the structural integrity of the engine by securing various components, ensuring that they remain firmly in place under operational stresses.

N14 MECHANICAL Engine

The N14 MECHANICAL engine also incorporates the Captive Washer Cap Screw in its design. This engine variant is typically favored for its reliability and durability. The screw’s role here is to provide a dependable fastening solution, crucial for the engine’s longevity and performance.

NH/NT 855 Engines

In the NH/NT 855 engines, the Captive Washer Cap Screw is another essential component. These engines are designed for versatility and performance, often used in a range of applications from agricultural to industrial use. The screw’s function in these engines is to ensure that all parts are securely fastened, contributing to the overall efficiency and reliability of the engine.

Each of these engines benefits from the use of the Captive Washer Cap Screw, which plays a pivotal role in maintaining the engine’s structural integrity and operational efficiency.

Role in Various Engine Components

The Cummins 3067564 Captive Washer Cap Screw is integral to the assembly and secure functioning of several engine components. Its application spans across different systems, ensuring that parts remain firmly in place under operational stresses.

Accessory Drive Systems

In accessory drive systems, the Captive Washer Cap Screw is employed to fasten components such as pulleys and brackets. This secure attachment is essential for maintaining the alignment and operational integrity of belts and chains that drive accessories like alternators and water pumps.

Air Compressor Assemblies

For air compressor systems, whether standalone or part of an air conditioning unit, the Captive Washer Cap Screw plays a significant role. It is used in the mounting of compressors to the engine or chassis, providing a stable base that resists vibration and ensures efficient compressor operation.

Fuel Pump Assemblies

In fuel pump systems, the screw is utilized to secure the pump housing to the fuel tank or engine block. This securement is vital for maintaining the pump’s position and operational efficiency, directly influencing fuel delivery to the engine.

Compressor Mounting Structures

Across various compressor mounting scenarios, including those for air conditioning and refrigeration systems, the Captive Washer Cap Screw ensures that compressors are tightly secured to their mounts. This reduces the risk of movement or detachment, which could lead to system failure or inefficiency.

General Application in Drive and Mounting Systems

Beyond specific applications, the Captive Washer Cap Screw is a versatile fastener in drive and mounting systems throughout engine assemblies. Its design allows for easy installation and removal while providing a strong, vibration-resistant connection between components.

Conclusion

The Cummins 3067564 Captive Washer Cap Screw is a vital component in the maintenance and operation of commercial trucks and Cummins engines. Its robust design, ease of installation, and resistance to vibration and corrosion make it an essential fastener for ensuring the reliability and safety of heavy-duty vehicles. Regular maintenance and proper installation are key to maximizing the performance and lifespan of this Cummins part.