3034526
Captive Washer Cap Screw
Cummins®

The Captive Washer Cap Screw, specifically Part #3034526 by Cummins, is a component used in the maintenance and assembly of heavy-duty trucks. Cummins, a well-established manufacturer in the automotive and heavy-duty truck industry, produces this screw to meet the rigorous demands of commercial vehicle applications. This part is integral to ensuring the secure fastening of various components within a truck’s assembly, contributing to the overall reliability and performance of the vehicle.

Basic Concepts and Functionality

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 in position during installation, reducing the risk of loss and simplifying the fastening process. In heavy-duty trucks, these screws play a role in securing components by providing a stable and consistent clamping force, which is crucial for the integrity of the truck’s structure and systems ¹.

Purpose of the 3034526 Captive Washer Cap Screw

The 3034526 Captive Washer Cap Screw by Cummins is designed to facilitate the secure attachment of components within commercial trucks. It is applied in various truck systems where reliable fastening is required. This screw helps maintain the structural integrity of the truck by ensuring that parts remain firmly in place under operational stress and environmental conditions.

Key Features

The 3034526 Captive Washer Cap Screw boasts several design elements that enhance its functionality and durability. These include a robust construction that can withstand high tensile loads, a captive washer that ensures consistent clamping force, and a design that resists corrosion and wear. These features contribute to the screw’s reliability in demanding applications.

Benefits

Using the 3034526 Captive Washer Cap Screw offers several advantages. It provides improved security for fastened components, ensuring they remain in place under various operational conditions. The integrated washer simplifies the installation process, reducing the time and effort required for fastening. Additionally, its design contributes to maintenance efficiency by minimizing the need for frequent adjustments or replacements.

Installation Process

Installing the 3034526 Captive Washer Cap Screw involves several steps to ensure optimal performance. The process requires the use of appropriate tools, such as a torque wrench, to achieve the correct tightening specification. Best practices include cleaning the fastening area to remove any debris, using a thread lubricant to facilitate installation, and verifying the torque setting to ensure the screw is properly secured without over-tightening.

Troubleshooting and Maintenance

Common issues with Captive Washer Cap Screws may include loosening over time or damage due to corrosion. Troubleshooting steps involve inspecting the screw and washer for signs of wear or damage, ensuring proper torque settings during installation, and applying a corrosion-resistant coating if necessary. Regular maintenance checks can help prolong the lifespan and effectiveness of the screw, ensuring continued reliable performance.

Cummins: Manufacturer 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 quality and innovation in the automotive and heavy-duty truck industry. The company’s product range includes a variety of components and systems designed to meet the demanding requirements of commercial vehicles, demonstrating Cummins’ commitment to excellence and customer satisfaction.

Engine Compatibility

The Captive Washer Cap Screw 3034526, manufactured by Cummins, is a versatile component designed to fit a variety of engine models. This part is integral to the assembly and maintenance of several Cummins engines, ensuring secure fastening and stability.

Compatible Engines

F2.8 Series:

• F2.8 CM2620
• F135B

G855 Series:

• G855
• G855 CM558
• GTA855 CM558 (CM2358)

ISF Series:

• ISF2.8 CM2220 F129

K19 Series:

• K19

N14 Series:

• N14 CELECT
• N14 CELECT PLUS
• N14 G
• N14 MECHANICAL
• NH/NT 855
• QSN14 CM876 N103
• QSNT14 CM876 N102

V Series:

• V903
• VTA903 CM2250 V105

Role of Part 3034526 Captive Washer Cap Screw in Engine Systems

The 3034526 Captive Washer Cap Screw is integral to the assembly and functionality of various engine components. It ensures secure fastening and alignment, contributing to the overall stability and performance of the engine system.

Auxiliary Pump and Base Parts

In the auxiliary pump system, the 3034526 Captive Washer Cap Screw is used to fasten base parts securely. This ensures that the pump operates efficiently without any misalignment or movement that could affect its performance.

Corrosion Resistance and Mounting

For components like the corrosion resistor and its mounting, the 3034526 Captive Washer Cap Screw plays a significant role. It provides a reliable fastening solution that resists loosening over time, even in corrosive environments, thus maintaining the integrity of the corrosion resistor mounting.

EBM Pump and Lub Oil Systems

In the EBM (Electrically Driven Boosting Module) pump and lubricating oil systems, the 3034526 Captive Washer Cap Screw is employed to secure critical components. This includes the lub oil pump and its mounting, ensuring that the pump remains firmly in place during operation, which is essential for consistent oil flow and engine lubrication.

Exhaust Collector and Fan Drive

The exhaust collector and fan drive systems also benefit from the use of the 3034526 Captive Washer Cap Screw. It ensures that these components are tightly secured, which is vital for managing exhaust gases efficiently and maintaining the proper function of the fan drive.

Fuel System Components

In the fuel system, including the fuel filter, fuel filter mounting bracket, and fuel tank, the 3034526 Captive Washer Cap Screw is used to secure these components. This ensures a leak-free connection and stable mounting, which is critical for safe and efficient fuel delivery.

Lifting Arrangements and Brackets

For lifting arrangements and brackets, such as the lifting bracket and its mounting, the 3034526 Captive Washer Cap Screw provides the necessary strength and security. This is important during maintenance and repair operations where secure fastening is essential.

Lubricating Oil and Oil Pan Mounting

In the lubricating oil system, particularly for the oil pan mounting and oil pump, the 3034526 Captive Washer Cap Screw ensures that these components are securely fastened. This is important for maintaining the structural integrity of the oil system and ensuring consistent oil circulation.

Rear Engine Support

Finally, in the rear engine support, the 3034526 Captive Washer Cap Screw is used to secure this vital component. This ensures that the engine remains stable and aligned, which is important for overall engine performance and longevity.

Conclusion

The 3034526 Captive Washer Cap Screw by Cummins is a critical component in the maintenance and assembly of heavy-duty trucks. Its design and features ensure secure fastening and alignment of various engine components, contributing to the overall stability and performance of the engine system. Proper installation, maintenance, and troubleshooting are essential to maximize the benefits of this Cummins part.