3946947
Threaded Plug
Cummins®

Introduction

The Cummins Threaded Plug 3946947 is a specialized component designed for use in commercial truck systems. Its primary role is to seal openings within the engine or other systems, ensuring the integrity of the system by preventing fluid leaks and maintaining pressure. This part is integral to the efficient operation of the truck, contributing to overall system reliability and performance.

Basic Concepts of Threaded Plugs

Threaded plugs are mechanical components used to seal threaded openings in various systems. They function by being screwed into place, creating a tight seal that prevents the escape of fluids or gases. In automotive and industrial settings, threaded plugs are commonly employed to maintain system pressure, prevent leaks, and protect internal components from contaminants. Their design allows for easy installation and removal, making them versatile for a range of applications ¹.

Purpose of the Cummins Threaded Plug 3946947

The Cummins Threaded Plug 3946947 serves a specific function within the operation of a truck. It is designed to seal openings in the engine or other systems, playing a role in maintaining system pressure and preventing fluid leaks. By ensuring a secure seal, this plug contributes to the efficient operation of the truck, supporting the performance and longevity of the engine and related systems.

Key Features

The Cummins Threaded Plug 3946947 is characterized by several key features that enhance its performance and durability. It is constructed from high-quality materials, ensuring resistance to corrosion and wear. The plug features a specific thread type that allows for a secure fit within the system, and its design specifications are tailored to meet the demanding requirements of commercial truck applications. These features contribute to the plug’s ability to maintain a reliable seal under various operating conditions ².

Benefits

Utilizing the Cummins Threaded Plug 3946947 offers several advantages. It contributes to improved system integrity by effectively sealing openings and preventing fluid leaks. This, in turn, helps maintain system pressure and efficiency. Additionally, the plug’s durable construction and secure fit enhance the overall performance of the truck, ensuring reliable operation over time.

Installation Process

Proper installation of the Cummins Threaded Plug 3946947 is crucial for its effective function. The process involves cleaning the threaded opening to remove any debris or old sealant. The plug should then be screwed into place using the appropriate tools to ensure a secure fit. It is important to follow manufacturer guidelines for torque specifications to avoid over-tightening, which could damage the plug or the surrounding system ³.

Common Issues and Troubleshooting

Common issues associated with threaded plugs include leaks due to improper installation or wear over time. To address these problems, it is important to inspect the plug and the threaded opening for signs of damage or wear. If a leak is detected, the plug may need to be replaced or re-seated to ensure a proper seal. Regular maintenance and inspection can help identify and resolve issues before they lead to more significant problems.

Maintenance Tips

Regular maintenance of the Cummins Threaded Plug 3946947 is key to ensuring its longevity and reliable performance. This includes periodic inspection for signs of wear or damage, and cleaning the plug and surrounding area to prevent the buildup of contaminants. Following manufacturer recommendations for inspection intervals and care procedures will help maintain the plug’s effectiveness and contribute to the overall reliability of the truck.

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 strong reputation in the commercial truck industry for producing high-quality, reliable components. Their product range includes engines, powertrains, and aftermarket parts, all designed to meet the demanding requirements of commercial and industrial applications.

Threaded Plug 3946947 Compatibility with Cummins Engines

The Threaded Plug 3946947, manufactured by Cummins, is a versatile component that fits a variety of Cummins engines. This plug is designed to seal threaded openings, ensuring that fluids and gases remain contained within the engine system. Below is a detailed overview of the engines with which this part is compatible:

B Series Engines

• B4.5 RGT
• B5.6 CM2670 B152B
• B6.7 CM2670 B153B
• B6.7 CM2670 B164C

These B series engines, ranging from 4.5 to 6.7 liters, utilize the Threaded Plug 3946947 for sealing purposes. This part is crucial for maintaining the integrity of the engine’s fluid systems.

ISB Series Engines

• ISB (Chrysler)
• ISB CM2150
• ISB CM850
• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN
• ISB6.7 CM2250
• ISB6.7 CM2350 B101
• ISB6.7 G CM2180 B118
• ISBE CM2150
• ISBE4 CM850

The ISB series engines, which include both the standard ISB and the ISBE variants, are compatible with the Threaded Plug 3946947. This part is essential for sealing threaded ports on these engines, ensuring optimal performance and preventing leaks.

QSB Series Engines

• QSB4.5 CM2250 EC
• QSB4.5 CM850 (CM2850)
• QSB5.9 CM850
• QSB6.7 CM2250
• QSB6.7 CM2350 B105
• QSB6.7 CM850 (CM2850)
• QSB6.7 M CM2250
• QSB7 CM2880 B117

The QSB series engines, ranging from 4.5 to 7 liters, also utilize the Threaded Plug 3946947. This plug is critical for sealing threaded openings in these engines, ensuring that the internal systems remain sealed and operational.

The Threaded Plug 3946947 is a key component in maintaining the reliability and efficiency of these Cummins engines. Its compatibility across a wide range of engine models underscores its importance in the engine’s overall design and function.

Role of Part 3946947 Threaded Plug in Engine Systems

The Part 3946947 Threaded Plug is an essential component in various engine systems, ensuring the integrity and efficiency of the engine’s operation.

In the cooler system, the threaded plug seals openings or passages, preventing coolant leaks and maintaining the system’s pressure. This ensures efficient heat exchange and protects the engine from overheating.

Within the engine oil system, the threaded plug plays a significant role in sealing oil passages and galleries. It helps maintain oil pressure, which is vital for lubricating moving parts and reducing friction. Proper sealing ensures that oil is delivered consistently to critical components, enhancing engine performance and longevity.

In the filter head kit, the threaded plug is used to seal connections between the filter head and the engine block. This prevents oil leaks and ensures that the filtration process is effective, keeping contaminants out of the engine oil and prolonging the life of the engine components.

For the long block assembly, the threaded plug is employed to seal various ports and passages. This is important for maintaining the structural integrity of the long block, ensuring that all internal pressures are correctly managed, and preventing oil or coolant leaks that could compromise engine performance.

In a long block kit, the threaded plug is often included to facilitate the sealing of different components during the assembly process. It ensures that once the long block is installed, all passages are correctly sealed, allowing the engine to function optimally from the outset.

Lastly, in the lubricating oil filter head, the threaded plug is used to seal the connection points. This is essential for maintaining the efficiency of the oil filtration system, ensuring that clean oil is circulated throughout the engine, which is fundamental for the engine’s smooth operation and durability.

Conclusion

The Cummins Threaded Plug 3946947 is a critical component in maintaining the reliability and efficiency of commercial truck engines. Its role in sealing openings and preventing fluid leaks ensures the integrity of the engine’s systems, contributing to overall performance and longevity. Proper installation, maintenance, and understanding of its compatibility with various Cummins engines are essential for maximizing the benefits of this part.