3007634
Expansion Plug
Cummins®

The Cummins 3007634 Expansion Plug is a component designed for use in commercial trucks. It serves a specific function within the truck’s systems, contributing to the overall maintenance and operational efficiency of the vehicle. Understanding its purpose and significance is key for fleet operators and maintenance personnel to ensure optimal truck performance and longevity.

Basic Concepts of Expansion Plugs

An expansion plug is a device used in various automotive and heavy-duty truck systems to seal openings in engine blocks, transmission cases, and other components. It functions by expanding upon installation to create a tight seal, preventing fluid leaks and contaminants from entering the system. The general application of expansion plugs is widespread, as they are crucial for maintaining the integrity of fluid systems within vehicles ¹.

Purpose of the 3007634 Expansion Plug

The Cummins 3007634 Expansion Plug plays a role in the operation of a truck by sealing specific openings within the engine or cooling system. Its function is to ensure that fluids remain contained within their designated pathways, preventing leaks that could lead to system failure or reduced efficiency. By maintaining a secure seal, the plug contributes to the overall reliability and performance of the truck’s engine ².

Key Features

The Cummins 3007634 Expansion Plug is characterized by several key features that enhance its performance and durability. It is constructed from high-quality materials that are resistant to corrosion and high temperatures. The design includes elements that allow for expansion upon installation, ensuring a snug fit within the designated opening. Additionally, the plug may feature unique characteristics such as a tapered shape or specialized coatings to improve its sealing capabilities and longevity ³.

Benefits

Using the Cummins 3007634 Expansion Plug offers several benefits. It contributes to improved system integrity by providing a reliable seal that prevents fluid leaks. This can lead to enhanced performance of the truck’s engine or cooling system, as fluids are kept within their intended pathways. Furthermore, the use of a high-quality expansion plug can result in potential cost savings for fleet operators by reducing the need for frequent repairs or replacements due to leaks ⁴.

Installation Process

Proper installation of the Cummins 3007634 Expansion Plug involves several steps to ensure correct fitting and function. It is recommended to use specific tools designed for expansion plug installation to achieve the best results. The process includes cleaning the installation site, lubricating the plug, and using the appropriate tool to expand the plug into place. Following these steps helps to ensure a secure seal and proper function of the plug within the truck’s system ⁵.

Troubleshooting Common Issues

Common problems that may arise with expansion plugs include leaks or improper seating. To address these issues, it is important to inspect the plug and the installation site for any signs of damage or misalignment. Troubleshooting steps may involve removing the plug, cleaning the area, and reinstalling the plug with attention to detail to ensure a proper seal. In some cases, replacing the expansion plug may be necessary to resolve the issue ⁶.

Maintenance Tips

Regular maintenance of the Cummins 3007634 Expansion Plug is important to ensure its continued performance and durability. Inspection intervals should be established based on the truck’s usage and operating conditions. Signs of wear or damage, such as corrosion or leaks, should be addressed promptly. Replacement of the expansion plug may be necessary if significant wear is observed or if the plug no longer provides a secure seal ⁷.

Compatibility and Application

The Cummins 3007634 Expansion Plug is designed for use in specific types of trucks and engine models. It is important for users to be aware of the compatibility of the plug with their vehicle to ensure proper function and performance. Application notes provided by Cummins can offer guidance on the correct use of the expansion plug within the intended systems ⁸.

Cummins Corporation Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration, and emissions solutions. With a history of innovation and quality, Cummins has established a strong reputation in the heavy-duty truck and engine industry. The company’s product range includes components and systems designed to enhance the performance, efficiency, and reliability of commercial vehicles ⁹.

Compatibility of Expansion Plug Part 3007634 with Cummins Engines

The Expansion Plug part 3007634, manufactured by Cummins, is designed to fit a variety of Cummins engines. This part is crucial for maintaining the integrity of the engine’s cooling system by preventing leaks and ensuring proper sealing. Here is a detailed look at the engines with which this expansion plug is compatible:

G855 Series

• G855
• G855 CM558
• GTA855 CM558 (CM2358) G101

ISX12 Series

• ISX12 CM2350 X102
• ISX12 G CM2180 EJ
• ISX12/ISX11.9 CM2250

ISZ13 Series

• ISZ13 CM2150 Z105

N14 Series

• N14 CELECT
• N14 CELECT PLUS
• N14 G
• N14 MECHANICAL

QSK19 Series

• QSK19 CM500
• QSK19G

QSK60 Series

• QSK60 G CM2358 K110

QSK95 Series

• QSK95 CM2350 K111
• QSK95 CM2350 K113

QSN14 Series

• QSN14 CM876 N103

QSNT14 Series

• QSNT14 CM876 N102

QSX11.9 Series

• QSX11.9 CM2250 ECF

QSZ13 Series

• QSZ13 CM2150 Z101
• QSZ13 CM2150 Z102

NH/NT 855 Series

• NH/NT 855

V903 Series

• V903

VTA903 Series

• VTA903 CM2250 V105

Z13 Series

• Z13 Z108G

This expansion plug is engineered to provide a secure and reliable fit across these diverse engine models, ensuring optimal performance and longevity of the cooling system ¹⁰.

Role of Part 3007634 Expansion Plug in Engine Systems

The Expansion Plug, identified by part number 3007634, is integral to the operation and maintenance of various engine components. Its primary function is to seal and secure different parts, ensuring optimal performance and longevity of the engine system.

Interaction with Key Components

• Cylinder Block and Cylinder Head: The Expansion Plug is often used to seal openings in the cylinder block and cylinder head. This prevents coolant or oil leakage, maintaining the integrity of the cooling and lubrication systems.

• Camshaft and Cam Follower Housing: In the camshaft and cam follower housing, the Expansion Plug helps in sealing the pathways and chambers, ensuring smooth operation of the valve timing mechanism.

• Connecting Rod and Piston: Within the connecting rod and piston assembly, the Expansion Plug can be employed to seal off any unnecessary passages, contributing to the overall efficiency of the combustion process.

• Front Gear and Gear Top Level Assembly Cover: The plug is utilized in the front gear and gear top level assembly cover to prevent the ingress of contaminants and the egress of lubricants, thus preserving the precision of the gear mechanisms.

• Injector and Lubricating Oil Cooler Mounting: For components like the injector and lubricating oil cooler mounting, the Expansion Plug ensures that the fuel delivery and oil cooling systems remain sealed, enhancing engine performance and reliability.

• Turbocharger and EBM-Performance Parts: In high-performance applications, such as those involving turbochargers and EBM-performance parts, the Expansion Plug plays a role in maintaining the pressure integrity of the system, which is vital for achieving desired power outputs.

Supporting Engine Maintenance and Upgrades

• Dataplate and Cover: When installing or replacing the dataplate and cover, the Expansion Plug aids in securing these components, ensuring they remain in place under various operating conditions.

• Housing and Base Parts: In the housing and base parts of the engine, the Expansion Plug contributes to the structural integrity by filling voids and preventing the accumulation of debris.

Enhanced Performance and Reliability

• EBM-Head and EBM-Follower: For engines equipped with EBM-head and EBM-follower systems, the Expansion Plug is essential in maintaining the precise clearances and sealing required for these high-performance components.

• Cam and Follower: In the cam and follower system, the Expansion Plug ensures that the relative motion between these parts is smooth and free from contaminants, which is crucial for the durability and efficiency of the engine.

By understanding the role of the Expansion Plug in these various engine components, engineers and mechanics can better appreciate its importance in maintaining the overall health and performance of the engine system ¹¹.

Conclusion

The Cummins 3007634 Expansion Plug is a vital component in the maintenance and operation of commercial trucks. Its role in sealing various engine components ensures the integrity of fluid systems, enhances engine performance, and contributes to the longevity of the vehicle. Proper installation, regular maintenance, and understanding its compatibility with specific engine models are essential for maximizing the benefits of this Cummins part.