3066310
Captive Washer Cap Screw
Cummins®

Introduction

Captive washer cap screws are essential components in the assembly and maintenance of commercial trucks. These screws, including the 3066310 model by Cummins, are designed to streamline the fastening process and enhance the reliability of mechanical assemblies. This document provides an overview of the role and significance of captive washer cap screws, with a specific focus on the 3066310 model.

Basic Concepts of Captive Washer Cap Screws

Captive washer cap screws are a type of fastener that includes an integrated washer, which remains attached to the screw during installation. This design eliminates the need for separate washers, simplifying the assembly process and reducing the likelihood of washers being misplaced or lost. These screws are commonly used in applications where sealing, vibration resistance, and ease of assembly are important ¹.

Purpose of the 3066310 Captive Washer Cap Screw

The 3066310 captive washer cap screw by Cummins is designed to play a specific role in the operation and maintenance of commercial trucks. It is used in various applications where secure fastening and sealing are required. This screw is particularly important in truck mechanics for its ability to provide a reliable connection in environments where vibrations and dynamic loads are common ³.

Key Features

The 3066310 captive washer cap screw boasts several key features that enhance its functionality and durability. It is constructed from high-quality materials, ensuring resistance to corrosion and wear. The design includes a captive washer that provides improved sealing properties, helping to prevent leaks and maintain the integrity of the assembly. Additionally, the screw features a robust thread design that offers excellent resistance to loosening under vibration ².

Benefits

Using the 3066310 captive washer cap screw offers several advantages. The integrated washer simplifies the assembly process, reducing the time and effort required for installation. The screw’s design enhances sealing properties, which is particularly beneficial in applications where fluid or gas containment is critical. Furthermore, the screw’s resistance to vibration and loosening ensures long-term reliability, minimizing the need for frequent maintenance ³.

Troubleshooting and Maintenance

Common issues with captive washer cap screws may include loosening due to vibration or corrosion over time. Regular inspection and maintenance can help identify and address these issues promptly. It is recommended to check the tightness of the screws periodically and reapply any necessary sealants or coatings to maintain optimal performance. In cases where screws show signs of wear or damage, replacement with a new 3066310 captive washer cap screw is advised to ensure continued reliability ³.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a rich history of innovation and quality, Cummins is committed to providing reliable and efficient solutions for the automotive and engine component industry. The company’s extensive product range and dedication to excellence make it a trusted name in the field of commercial truck components.

Compatibility with Cummins Engines

The 3066310 captive washer cap screw is compatible with a variety of Cummins engines. This screw is designed to secure parts in place by using a captive washer, which eliminates the need for an external washer and nut, thereby simplifying the assembly process and reducing the risk of parts loosening over time.

Engines Compatible with 3066310

QSK Series:

• QSK19 CM500
• QSK19 CM850 MCRS
• QSK19G
• QSK45 CM500
• QSK60 CM500

QSN and QSNT Series:

• QSN14 CM876 N103
• QSNT14 CM876 N102

N Series:

• N14 CELECT PLUS
• N14 MECHANICAL

Other Engines:

• GTA38 G CMEICS G116C
• K50, L10 GAS
• NH/NT 855
• QST30 CM552
• VTA903 CM2250 V105

Role of 3066310 Captive Washer Cap Screw in Engine Systems

The 3066310 captive washer cap screw is integral to the assembly and secure functioning of various engine components. Its application spans across multiple systems, ensuring the stability and integrity of the engine’s structure and operational elements.

Aftercooler Water Plumbing

In the aftercooler water plumbing system, the captive washer cap screw secures fittings and connections, preventing leaks and ensuring efficient cooling of the compressed air.

Compressor Mounting

For compressor mounting, this screw plays a role in attaching the compressor to the engine block, providing a stable and vibration-resistant connection.

Crankcase Breather

In the crankcase breather system, it is used to secure breather components, allowing for the safe release of gases from the crankcase without compromising engine integrity.

EBM Plumbing

Within the EBM (Electronic Boost Module) plumbing, the screw ensures that all connections are tight and secure, which is vital for maintaining the correct boost pressure.

Fuel System Components

In the fuel system, including the Electronic Fuel Control Top Level Assembly Valve and the Electronic Fuel Control Valve, the screw is used to secure fuel lines and components, ensuring a leak-free and efficient fuel delivery system.

Engine Control Module (ECM) and Its Mounting

For the Engine Control Module and its mounting, the screw is essential in securing the ECM to its designated location, ensuring it remains in place and functions correctly under various engine conditions.

Fuel Plumbing and Tubing

In fuel plumbing and tubing, the screw is utilized to secure fuel lines and connectors, preventing fuel leaks and ensuring consistent fuel pressure.

Hardware and Kits

In various hardware kits such as the 12V Valve/Electric Kit, HHP 12V VLV/ELEC Kit, and the QKS Valve & Mounting Kit, the screw is used to assemble and secure components, ensuring they function as intended.

N14 24V Hardware-Pressure-Time Valve/Mounting Kit

Within this kit, the screw secures the pressure-time valve and its mounting components, ensuring precise control over engine pressure and timing.

Oil Replenishing System

In the oil replenishing system, it is used to secure components that manage oil levels, ensuring the engine receives the necessary lubrication.

Overspeed Switch

For the overspeed switch, the screw secures the switch to the engine, providing a reliable method to monitor and control engine speed.

Performance Parts and Plumbing

In performance parts and general plumbing applications, the screw is used to secure various components, enhancing the engine’s performance and reliability.

PRS Regulator

Within the PRS (Pressure Relief System) regulator, the screw ensures that all components are securely fastened, maintaining the system’s ability to relieve excess pressure safely.

Rocker Lever Mounting Cover

For the rocker lever mounting cover, the screw secures the cover in place, protecting the rocker levers and ensuring their proper function.

Turbocharger Arrangement and Mounting Repair Kit

In turbocharger arrangements and mounting repair kits, the screw is used to secure turbocharger components, ensuring they are firmly attached and function efficiently.

Conclusion

The 3066310 captive washer cap screw is a versatile component that enhances the security and functionality of a wide range of engine systems, contributing to the overall performance and reliability of the engine. Its design and features make it an essential part in the maintenance and assembly of commercial trucks, particularly those equipped with Cummins engines.