3064321
Captive Washer Cap Screw
Cummins®

Introduction

The Cummins 3064321 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 attachment of various parts within the truck’s mechanical systems, contributing to the overall reliability and performance of the vehicle.

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 helps to streamline the assembly process by reducing the number of components required and minimizing the risk of washer loss. These screws are commonly used in mechanical assemblies where consistent and secure fastening is necessary ¹.

Purpose of the Cummins 3064321 Captive Washer Cap Screw

The Cummins 3064321 Captive Washer Cap Screw plays a specific role in the operation and maintenance of commercial trucks. It is used to secure components, ensuring structural integrity and reliable performance. By providing a stable and consistent fastening solution, this screw helps to maintain the alignment and functionality of critical truck parts ².

Key Features

The Cummins 3064321 Captive Washer Cap Screw is characterized by several key features that enhance its performance and durability. Its design includes an integrated washer, which ensures consistent pressure distribution and reduces the likelihood of component misalignment. The screw is made from high-quality materials, providing resistance to corrosion and wear. Additionally, its unique attributes contribute to improved assembly efficiency and long-term reliability ³.

Benefits of Using Captive Washer Cap Screws

Captive washer cap screws offer several advantages in mechanical assemblies. They improve assembly efficiency by reducing the number of components needed and simplifying the installation process. The integrated washer minimizes the risk of washer loss during installation, ensuring consistent and secure fastening. Furthermore, these screws enhance fastening security, contributing to the overall reliability and performance of the assembly ⁴.

Installation Guidelines

Proper installation of the Cummins 3064321 Captive Washer Cap Screw is crucial for optimal performance and longevity. Follow these step-by-step instructions:

1. Ensure the mating surfaces are clean and free of debris.
2. Align the screw with the designated hole.
3. Use a torque wrench to tighten the screw to the specified torque setting, ensuring consistent pressure distribution.
4. Verify the screw is securely fastened and the washer is properly seated ⁵.

Troubleshooting and Maintenance

Common issues with captive washer cap screws may include loosening over time or corrosion. To address these problems, regularly inspect the screws for signs of wear or damage. If loosening is detected, re-tighten the screw to the specified torque setting. To prevent corrosion, apply a suitable anti-corrosive coating or lubricant. Maintaining the screws in this manner will help prolong their lifespan and ensure continued reliable performance ⁶.

Cummins: A Brief Overview

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 serves the automotive and heavy-duty truck sectors, providing reliable and high-performance solutions. The company’s commitment to excellence is evident in its diverse product range and continuous pursuit of technological advancements ⁷.

Cummins Part 3064321 Captive Washer Cap Screw in Engine Applications

The Cummins part 3064321 Captive Washer Cap Screw is a critical component in various Cummins engine models, ensuring secure fastening and stability in numerous engine assemblies. This part is designed to meet the rigorous demands of engine operations, providing reliable performance across different engine configurations.

K-Series Engines

In the K-Series engines, such as the K19, K38, and K50, the part 3064321 is utilized in several key areas. It is often employed in securing components within the engine block, ensuring that parts remain tightly fastened under the high stresses of engine operation. The KTA19GC, KTA19GC CM558, and KTA38GC CM558 models also benefit from this cap screw, particularly in applications where vibration resistance and durability are paramount ⁸.

N-Series Engines

For the N-Series engines, including the N14 CELECT PLUS and N14 MECHANICAL, the part 3064321 plays a vital role in maintaining the structural integrity of the engine. It is commonly found in the fastening of engine mounts, brackets, and other critical components that require a high level of security and resistance to loosening ⁹.

QSK-Series Engines

The QSK-Series engines, such as the QSK19 CM2350 K114, QSK19 CM2350 K144G, QSK19 CM500, QSK19 CM850 MCRS, QSK19G, QSK50 CM2150 K107, QSK50 CM2150 MCRS, QSK50 CM2350 K108, and QSK60 CM850 MCRS, extensively use the part 3064321. This cap screw is integral in securing various engine components, including those in the exhaust systems, fuel systems, and other critical assemblies that must withstand the high pressures and temperatures typical of these engines ¹⁰.

V-Series Engines

In the V-Series engines, such as the V903 and VTA903 CM2250 V105, the part 3064321 is used to ensure the secure fastening of components that are subjected to significant mechanical stress. This includes the fastening of engine mounts, brackets, and other structural elements that are crucial for the engine’s overall performance and longevity ¹¹.

The consistent use of the part 3064321 across these diverse engine models underscores its importance in maintaining the reliability and efficiency of Cummins engines. This cap screw’s design and material properties ensure that it can endure the demanding conditions of engine operation, providing a dependable solution for securing various engine components.

Role of Part 3064321 Captive Washer Cap Screw in Engine Systems

The Part 3064321 Captive Washer Cap Screw is integral to the secure assembly and operation of various engine components. Its application spans across multiple systems, ensuring the integrity and functionality of each part.

In the aftercooler plumbing mounting and aftercooler water plumbing, this screw plays a role in fastening components that manage the cooling of compressed air, enhancing engine efficiency. For the base parts, it ensures that foundational elements are firmly attached, providing a stable platform for other components.

Within the cover hand hole mounting, the screw is used to secure covers that provide access to internal engine components for maintenance and inspection. In the crankcase breather arrangement and crankcase explosion valve, it helps maintain the pressure balance within the crankcase, preventing damage from excessive pressure build-up.

The damper & alternator guard relies on this screw to protect sensitive components from vibrations and physical damage. In the dipstick fill & breather and fill and breather systems, it ensures that these components are securely mounted, allowing for accurate oil level readings and proper ventilation.

For the electronic control module wiring harness and engine control module, the screw is essential in securing the wiring and modules, ensuring reliable electrical connections and system performance. In the fuel control module and fuel pump, it aids in the secure attachment of components that regulate fuel delivery, crucial for engine operation.

The fuel transfer kit and fuel transfer right hand engine kit use this screw to ensure that fuel lines and components are securely fastened, preventing leaks and ensuring efficient fuel transfer. In the governor control linkage, it helps in maintaining the precise mechanical connections that control engine speed.

For the hand hole cover, the screw ensures that access panels are securely closed, protecting internal components. In the injector systems, it plays a part in securing injectors in place, ensuring accurate fuel injection.

The keel cooler plumbing benefits from this screw by securing components that cool the engine oil, maintaining optimal operating temperatures. In the muffler, it ensures that the exhaust system components are firmly attached, reducing noise and securing the system.

For the oil fill arrangement and oil level gauge, the screw ensures that these components are securely mounted, allowing for proper oil filling and accurate level monitoring. In the oil replenishing system, it helps in securing components that automatically top up the engine oil, maintaining lubrication.

The pressure regulator valve arrangement uses this screw to secure components that regulate pressure within the system, ensuring stable operation. Finally, in the service kit, it is used to reassemble and secure various components after maintenance, ensuring the engine is ready for operation ¹².

Conclusion

The Cummins 3064321 Captive Washer Cap Screw is a vital component in the maintenance and operation of heavy-duty trucks and various Cummins engine models. Its design, featuring an integrated washer, ensures consistent and secure fastening, contributing to the overall reliability and performance of the vehicle. Proper installation and maintenance of this screw are essential for optimal engine performance and longevity.