3915787
Threaded Plug
Cummins®

The Cummins 3915787 Threaded Plug is a component designed for use in commercial trucks. It serves a specific function within the engine system, contributing to the overall maintenance and operational efficiency of these vehicles. Understanding its purpose and significance can aid in the proper upkeep and performance of commercial trucks.

Basic Concepts of Threaded Plugs

Threaded plugs are mechanical components used to seal openings in various systems, including automotive and industrial applications. They function by being screwed into a threaded hole, creating a secure seal that prevents fluid or gas leakage. These plugs are utilized in a wide range of settings to maintain system integrity and efficiency ².

Purpose of the Cummins 3915787 Threaded Plug

The Cummins 3915787 Threaded Plug plays a role in the operation and maintenance of commercial trucks by sealing specific openings within the engine system. It is typically used in areas where a temporary or permanent seal is required to prevent leaks or contamination. Its importance lies in ensuring the engine system operates efficiently and remains free from contaminants that could affect performance ³.

Key Features

The Cummins 3915787 Threaded Plug is characterized by several key features that enhance its functionality. These include its material composition, which is designed to withstand the harsh conditions within an engine environment, and its thread type, which ensures a secure fit. Additionally, any unique design elements contribute to its effectiveness in sealing and durability ⁴.

Benefits

Using the Cummins 3915787 Threaded Plug offers several benefits. It provides improved sealing capabilities, ensuring that engine systems remain leak-free. Its durability means it can withstand the rigors of commercial truck operation, and its design facilitates ease of installation, making it a practical choice for maintenance professionals ¹.

Installation Process

Installing the Cummins 3915787 Threaded Plug involves a series of steps to ensure a secure fit. The process includes preparing the threaded hole, applying any necessary sealant, and screwing the plug into place using the appropriate tools. Best practices for installation include ensuring the threads are clean and undamaged and that the plug is tightened to the manufacturer’s specified torque settings ².

Common Issues and Troubleshooting

Threaded plugs, including the Cummins 3915787, may encounter issues such as leaks or difficulty in removal. Troubleshooting these problems involves inspecting the plug and the threaded hole for damage, ensuring the correct torque was used during installation, and considering the application of a thread sealant if leaks persist. In cases of difficulty in removal, specialized tools may be required to avoid damaging the plug or the surrounding components ³.

Maintenance Tips

Regular maintenance of threaded plugs is important for ensuring longevity and optimal performance. This includes periodic inspection for signs of wear or damage, cleaning the threads as necessary, and replacing the plug if it shows signs of deterioration. Adhering to recommended inspection intervals can help prevent unexpected failures and maintain engine efficiency ⁴.

Cummins Overview

Cummins Inc. is a leading manufacturer of diesel engines with a significant presence in the commercial truck industry. Founded with a commitment to innovation and quality, Cummins has established itself as a trusted provider of engine components that play a vital role in the performance and reliability of commercial vehicles. The company’s components, including the Cummins 3915787 Threaded Plug, are designed with the rigors of commercial operation in mind, contributing to the efficiency and durability of the vehicles they power.

Threaded Plug 3915787 Compatibility with Cummins Engines

The Cummins Threaded Plug part number 3915787 is designed to fit a variety of Cummins engine models. This plug is essential for sealing and securing various components within the engine, ensuring optimal performance and reliability. Below is a detailed list of the engines with which this threaded plug is compatible:

4B3.9 Series

• 4B3.9

6B5.9 Series

• 6B5.9

B3.9 Series

• B3.9 G

B4.5 Series

• B4.5

B5.6 Series

• B5.6 CM2670 B152B

B5.9 Series

• B5.9
• B5.9 CM2670 B166C
• B5.9 GAS PLUS CM556

B6.7 Series

• B6.7 CM2350 B135B
• B6.7 CM2670 B153B
• B6.7 CM2670 B164C
• B6.7 G CMOH6.0 B125

G5.9 Series

• G5.9
• G5.9 CM558

ISB Series

• ISB CM550
• ISB CM850
• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN
• ISB3.9 CM2220 B107
• ISB5.9 CM2880 B110
• ISB5.9 CM2880 B127
• ISB5.9 CM2880 B140
• ISB5.9 CM2880 B149
• ISB5.9G CM2180
• ISB6.7 G CM2180 B118

This threaded plug is engineered to meet the stringent requirements of Cummins engines, ensuring a secure and leak-proof connection. It is crucial for maintaining the integrity of the engine’s internal systems, particularly in areas where fluid or gas leakage could lead to performance issues or safety hazards.

Role of Part 3915787 Threaded Plug in Engine Systems

The part 3915787 Threaded Plug is an essential component in various engine systems, contributing to the overall efficiency and reliability of the engine. Its primary function is to seal and secure specific points within the engine, ensuring that fluids and gases remain contained within their designated pathways.

In the cylinder head, the threaded plug is used to seal off unused passages or to provide a mounting point for sensors and other components. This helps maintain the integrity of the combustion chamber and ensures that no gases escape, which could lead to a loss of efficiency.

Within the engine oil system, the threaded plug is often found in the lube oil filter head and lubricating oil filter cover. Here, it serves to seal the filter housing, preventing oil leaks and ensuring that the filtration process is effective. This is particularly important in the full flow oil filter, where the majority of the engine oil passes through the filter media.

The lubricating oil cooler module also utilizes the threaded plug to seal connections between the cooler and the engine oil passages. This ensures that the oil is effectively cooled before returning to the engine, which is vital for maintaining optimal operating temperatures.

In the engine oil cooler and associated housing, the threaded plug is used to seal off connections and passages, ensuring that the cooling process is efficient and that there are no leaks in the system.

Additionally, in the long block assembly, the threaded plug may be used to seal various passages and connections, contributing to the overall sealing integrity of the engine block.

Overall, the part 3915787 Threaded Plug plays a significant role in maintaining the sealing and structural integrity of various engine components, ensuring that the engine operates smoothly and efficiently.

Conclusion

The Cummins 3915787 Threaded Plug is a critical component in the maintenance and operation of commercial truck engines. Its role in sealing and securing various engine components ensures the efficiency and reliability of the engine system. Understanding its features, benefits, and proper installation and maintenance practices is essential for ensuring the longevity and performance of commercial vehicles.