3012469
Captive Washer Cap Screw
Cummins®

The Cummins 3012469 Captive Washer Cap Screw is a specialized fastener designed for use in heavy-duty truck maintenance and operation. This component is integral to ensuring the secure assembly of various truck components, contributing to the overall reliability and performance of the vehicle.

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 collar or step on the screw’s shaft. This design ensures that the washer remains attached to the screw during installation, reducing the risk of loss and simplifying the assembly process. Captive Washer Cap Screws are commonly used in mechanical assemblies where vibration resistance and consistent torque are required ¹.

Purpose of the Cummins 3012469 Captive Washer Cap Screw

The Cummins 3012469 Captive Washer Cap Screw plays a specific role in truck operations by providing a secure and vibration-resistant connection between components. It is often used in areas where maintaining a tight and consistent connection is crucial, such as in engine mounts, transmission components, and chassis assemblies. Its functional importance lies in its ability to withstand the dynamic forces and vibrations encountered in heavy-duty truck applications ².

Key Features

The Cummins 3012469 Captive Washer Cap Screw boasts several key features that enhance its performance and durability. These include a high-strength material composition, typically made from alloy steel, which provides excellent resistance to wear and corrosion. The design incorporates a captive washer that ensures consistent load distribution and prevents washer loss. Additionally, the screw features a hexagonal head for easy installation and removal using standard tools.

Benefits

Using the Cummins 3012469 Captive Washer Cap Screw offers several advantages. Its integrated washer design simplifies the installation process by eliminating the need for separate washers, reducing the risk of misplacement or loss. The high-strength material ensures reliable performance under demanding conditions, while the captive washer enhances vibration resistance. Moreover, the ease of installation and maintenance contributes to overall efficiency in truck servicing ³.

Installation Process

Proper installation of the Cummins 3012469 Captive Washer Cap Screw involves several steps. Begin by ensuring the mating surfaces are clean and free of debris. Use a torque wrench to install the screw to the specified torque setting, which ensures consistent clamping force and prevents over-tightening. It is advisable to use a thread lubricant to facilitate installation and reduce the risk of galling. Additionally, verify that the captive washer is properly seated against the component being fastened.

Common Applications

The Cummins 3012469 Captive Washer Cap Screw is commonly applied in various heavy-duty truck systems. Typical applications include engine mounts, where it helps secure the engine to the chassis, and transmission components, where it ensures a stable connection between the transmission and the drivetrain. It is also used in chassis assemblies to fasten critical components, contributing to the structural integrity of the truck.

Troubleshooting and Maintenance

To ensure the longevity and optimal performance of the Cummins 3012469 Captive Washer Cap Screw, regular maintenance is recommended. Inspect the screw and captive washer for signs of wear or damage during routine servicing. If corrosion is detected, clean the affected area and apply a corrosion-resistant coating. Replace the screw if significant wear is observed to prevent failure. Additionally, ensure that the torque settings are maintained during reinstallation to preserve the integrity of the connection.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a reputation for innovation, quality, and reliability in the automotive and heavy-duty truck industry. The company’s extensive product range includes engines, powertrain components, and aftermarket parts, all designed to meet the demanding requirements of commercial vehicle applications.

Captive Washer Cap Screw 3012469 in Cummins Engines

The Captive Washer Cap Screw 3012469, 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 Series Engines

The G855 series, which includes variants like G855 CM558 and GTA855 CM558 (CM2358), utilizes the 3012469 screw in various applications. These engines are known for their robust design and high performance, and the cap screw plays a vital role in maintaining the integrity of the engine’s components.

G101 Series Engines

The G101 engine also incorporates the 3012469 cap screw. This engine is part of the G series and is designed for applications requiring reliable power and efficiency.

N14 Series Engines

The N14 series engines, including N14 CELECT PLUS, N14 G, and N14 MECHANICAL, all feature the 3012469 screw. These engines are known for their versatility and are used in a wide range of applications, from agricultural to industrial uses. The cap screw is essential in ensuring the secure attachment of various engine parts.

NH/NT 855 Series Engines

The NH/NT 855 engine also employs the 3012469 cap screw. This engine is part of the larger NH/NT series and is designed for heavy-duty applications, providing the necessary strength and durability.

QSN14 Series Engines

The QSN14 CM876 N103 and QSNT14 CM876 N102 engines are another set of Cummins engines that utilize the 3012469 cap screw. These engines are known for their high performance and reliability, and the cap screw is a key component in their assembly.

In summary, the Captive Washer Cap Screw 3012469 is a vital part in the assembly and operation of several Cummins engine models, ensuring the secure fastening and stability of various engine components.

Role of Part 3012469 Captive Washer Cap Screw in Engine Systems

The Part 3012469 Captive Washer Cap Screw is integral to the assembly and secure functioning of various engine components. Its application spans across multiple systems, ensuring stability and reliability in operation.

Base Parts Assembly

In the assembly of base parts, the 3012469 Captive Washer Cap Screw is utilized to fasten components securely. This ensures that the base parts remain firmly in place, providing a stable foundation for other engine components to be mounted upon. The screw’s design, featuring a captive washer, enhances the fastening process by preventing washer loss and ensuring consistent torque application.

EBM: Pump Integration

For the EBM (Electric Blower Motor) pump systems, the 3012469 screw plays a significant role in securing the pump housing to its mounting bracket. This secure attachment is vital for the pump’s efficient operation, as it ensures that the pump remains aligned and stable during operation, contributing to the overall cooling efficiency of the engine.

Water System Components

In water system components, such as the water pump and its associated parts (e.g., water mounting pump, water pump and idler, water pump mounting), the 3012469 screw is employed to fasten the pump to its housing and the engine block. This secure attachment is essential for maintaining the integrity of the water flow system, ensuring that coolant is circulated effectively throughout the engine to prevent overheating.

Vibration Damper Attachment

The vibration damper, a component designed to reduce engine vibrations, also benefits from the use of the 3012469 screw. By securely attaching the damper to the engine, the screw helps in maintaining the damper’s position and effectiveness, contributing to a smoother engine operation and reduced wear on engine components.

Water Pump and Idler Setup

In the setup of the water pump and idler, the 3012469 screw is used to fasten the idler pulley to the engine block or its designated mounting point. This secure attachment ensures that the idler pulley remains in the correct position, allowing for proper belt tension and efficient operation of the water pump. The screw’s captive washer feature further enhances the security of this attachment, preventing any potential loosening over time.

Overall, the 3012469 Captive Washer Cap Screw is a versatile fastener that plays a significant role in the secure and efficient operation of various engine components. Its application across different systems underscores its importance in maintaining the structural integrity and operational efficiency of engine assemblies.

Conclusion

The Cummins 3012469 Captive Washer Cap Screw is a critical component in the maintenance and operation of heavy-duty trucks. Its design, featuring a captive washer, ensures secure and vibration-resistant connections across various engine systems. Regular maintenance and proper installation are essential to maximize its performance and longevity.