3068533
Captive Washer Cap Screw
Cummins®

The Cummins 3068533 Captive Washer Cap Screw is a specialized fastener designed for use in heavy-duty truck applications. Its purpose is to provide secure and reliable fastening in various truck components, ensuring the integrity and performance of the vehicle. This screw is significant in maintaining the structural and functional aspects of commercial trucks, contributing to their durability and efficiency ¹.

Basic Concepts

A Captive Washer Cap Screw is a type of fastener that incorporates a washer within its design. This washer is held captive between the screw head and the nut or threaded component it is securing. The primary function of this design is to distribute the load more evenly across the fastened surfaces, reducing the risk of damage and ensuring a tighter seal. In mechanical assemblies, these screws are commonly used where vibration resistance and secure fastening are required ².

Purpose and Role in Truck Operation

The 3068533 Captive Washer Cap Screw plays a specific role in the operation and maintenance of commercial trucks. It is utilized in various truck components and systems, such as engine mounts, chassis assemblies, and body panels. By providing a secure and vibration-resistant fastening solution, this screw helps maintain the structural integrity of these components, ensuring they function correctly under the demanding conditions of heavy-duty truck operation ¹.

Key Features

The Cummins 3068533 Captive Washer Cap Screw features several design elements that enhance its performance and durability. It is constructed from high-strength materials, ensuring it can withstand the rigors of heavy-duty truck applications. The captive washer design allows for improved load distribution and sealing, while the screw’s threading provides a secure and reliable fastening mechanism. Additionally, the screw is designed to resist corrosion and wear, contributing to its longevity in harsh operating environments ¹.

Benefits

Using the 3068533 Captive Washer Cap Screw in truck maintenance and repair offers several advantages. The captive washer design improves sealing between fastened components, reducing the risk of leaks and ensuring a tighter connection. Enhanced load distribution helps prevent damage to fastened surfaces, while the screw’s secure fastening mechanism ensures components remain firmly in place, even under vibration. The simplified installation process, due to the integrated washer, saves time and reduces the likelihood of installation errors ².

Installation Process

Proper installation of the 3068533 Captive Washer Cap Screw is crucial for ensuring optimal performance and longevity. Begin by selecting the appropriate screw size and thread pitch for the application. Use a torque wrench to tighten the screw to the manufacturer’s specified torque settings, ensuring a secure yet not over-tightened connection. It is important to follow any special procedures or guidelines provided by Cummins for this specific screw to ensure the best results ¹.

Troubleshooting and Maintenance

Common issues with the 3068533 Captive Washer Cap Screw may include loosening due to vibration, corrosion, or wear. To address these problems, regularly inspect the screw and its fastened components for signs of damage or wear. If loosening is detected, re-tighten the screw to the specified torque settings. In cases of corrosion, consider replacing the screw to prevent further degradation. Routine maintenance and inspection can help prolong the component’s lifespan and ensure continued reliable performance ².

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 is committed to innovation and quality in the automotive and engine manufacturing sectors. The company’s extensive product range includes engines for on-highway and off-highway applications, as well as filtration and power generation solutions, serving a wide array of industries and applications ³.

Captive Washer Cap Screw 3068533 in Cummins Engines

The Captive Washer Cap Screw 3068533, manufactured by Cummins, is a critical component in various Cummins engine models. This part is designed to secure and stabilize different engine parts, ensuring the integrity and performance of the engine.

K19 Series Engines

The K19 series engines, including the K19, KTA19GC, KTA19GC CM558, and QSK19 CM2350 K105, QSK19 CM2350 K114, QSK19 CM500, QSK19 CM850 MCRS, and QSK50 CM2350 K108, utilize the Captive Washer Cap Screw 3068533 in several key areas. This screw is integral in securing the engine’s internal components, ensuring that parts remain tightly fastened and aligned during operation.

N14 Series Engines

In the N14 series engines, specifically the N14 CELECT PLUS and N14 MECHANICAL, the Captive Washer Cap Screw 3068533 is used to maintain the structural integrity of the engine. This screw is essential in fastening various engine parts, ensuring that the engine operates smoothly and efficiently.

NH/NT 855 Engine

The NH/NT 855 engine also incorporates the Captive Washer Cap Screw 3068533. This screw plays a crucial role in securing the engine’s components, ensuring that the engine maintains its structural integrity and performs optimally under various operating conditions.

V903 Engine

The V903 engine utilizes the Captive Washer Cap Screw 3068533 to secure and stabilize its components. This screw is vital in maintaining the engine’s structural integrity, ensuring that the engine operates reliably and efficiently.

Role of Part 3068533 Captive Washer Cap Screw in Engine Systems

The part 3068533 Captive Washer Cap Screw is instrumental in ensuring the secure assembly and reliable operation of various engine components. Its application spans across multiple critical areas within the engine system, facilitating both structural integrity and functional efficiency.

In the air intake manifold, this screw plays a role in securing the manifold to the engine block, ensuring a tight seal that prevents air leaks and maintains optimal airflow for combustion.

For the base parts less rgt and cam follower cover, the screw is used to fasten these components securely, which is essential for the precise operation of the camshaft and valve train.

The cam follower mounting cover relies on this screw to maintain its position and alignment, which is vital for the smooth operation of the valve mechanism.

In the crankcase breather system, including the crankcase breather arrangement and crankcase mounting breather, the screw ensures that the breather components are firmly attached, allowing for effective ventilation of the crankcase without compromising the seal.

The heat exchanger and housing aftercooler mounting benefit from the secure fastening provided by this screw, which is necessary for maintaining the structural integrity and efficient heat exchange.

Within the ignition system, the screw is used to secure various components, ensuring that the system remains stable and functions correctly under varying engine conditions.

For the lubricating oil cooler (both top-level assembly and front mounting), the screw helps in maintaining the secure attachment of the cooler to its mounting points, which is essential for effective oil cooling and engine lubrication.

The lubricating oil filter and lubricating oil pump assemblies also utilize this screw to ensure that these components are securely fastened, contributing to the reliable operation of the lubrication system.

In the noise panel mtg. and oil pan/noise panel mtg., the screw is critical for securing these panels, which help in reducing engine noise and vibration.

The rocker hsg cov (rocker housing cover) and support thermostat housing mounting rely on this screw to ensure that these covers and mounts are securely in place, which is important for the proper functioning of the engine’s cooling system.

For the turbocharger, the screw is used in various mounting points to ensure that the turbocharger is securely attached to the engine, which is essential for its efficient operation and durability.

The vibration damper also utilizes this screw to maintain its secure attachment to the engine, which is vital for reducing engine vibrations and ensuring smooth operation.

Lastly, in the water outlet connection, the screw ensures that the connection is securely fastened, which is important for maintaining the integrity of the cooling system and preventing leaks.

Conclusion

The Cummins 3068533 Captive Washer Cap Screw is a vital component in heavy-duty truck and engine applications. Its design and features contribute to the secure fastening and reliable operation of various truck and engine components. Proper installation, regular maintenance, and timely troubleshooting are essential to ensure the longevity and performance of this part in demanding environments.