3679954
Threaded Plug
Cummins®

The Cummins 3679954 Threaded Plug is a component used in commercial truck maintenance. It serves a specific function within the truck’s systems, contributing to the overall efficiency and reliability of the vehicle. Understanding its purpose and significance can help maintain the truck’s performance and longevity.

Basic Concepts of Threaded Plugs

Threaded plugs are mechanical components designed to seal openings in various systems, such as engines, fuel systems, and hydraulic systems. They function by creating a secure, leak-proof seal when screwed into place. These plugs are commonly used to prevent fluid leaks, protect against contaminants, and maintain system pressure. Their applications range from sealing unused ports to acting as temporary caps during maintenance procedures ¹.

Purpose of the Cummins 3679954 Threaded Plug

The Cummins 3679954 Threaded Plug plays a role in the operation of a truck by sealing specific openings within the engine or other systems. Its primary function is to prevent fluid leaks and protect internal components from contaminants. By ensuring a tight seal, it helps maintain system integrity and contributes to the efficient operation of the truck ².

Key Features

The Cummins 3679954 Threaded Plug is characterized by several primary features that enhance its performance and durability. These include its material composition, which is typically made from high-strength metal to withstand harsh operating conditions. The thread type is designed to provide a secure fit, ensuring a reliable seal. Additionally, the plug’s design specifications are tailored to meet the demanding requirements of commercial truck applications.

Benefits

Using the Cummins 3679954 Threaded Plug offers several advantages. It improves system integrity by providing a reliable seal that prevents fluid leaks. This, in turn, helps maintain the proper functioning of the truck’s systems. Additionally, the plug contributes to enhanced overall engine performance by ensuring that contaminants are kept out of critical components. Its durable construction also means it can withstand the rigors of commercial use, reducing the need for frequent replacements.

Installation Process

Proper installation of the Cummins 3679954 Threaded Plug involves several steps to ensure a secure and effective seal. Begin by cleaning the threading area to remove any debris or old sealant. Apply a compatible thread sealant to the plug’s threads to enhance the seal. Carefully screw the plug into place, using a torque wrench to achieve the recommended torque specification. Avoid over-tightening, as this can damage the threads or the plug itself. Finally, inspect the installation to ensure there are no leaks and that the plug is seated correctly.

Troubleshooting Common Issues

Frequent problems associated with threaded plugs include leaks and improper seating. If a leak is detected, first ensure that the plug is properly torqued. If the issue persists, the threads may be damaged, requiring the plug to be replaced. Improper seating can often be resolved by ensuring the threading area is clean and free of debris before installation. If problems continue, inspecting the plug for damage or deformities may be necessary.

Maintenance Tips

Regular maintenance practices can help ensure the longevity and effectiveness of the Cummins 3679954 Threaded Plug. Inspect the plug during routine maintenance checks for signs of wear or damage. Replace the plug if it shows signs of corrosion, threading damage, or if it no longer provides a secure seal. Additionally, follow manufacturer guidelines for inspection intervals and replacement to maintain optimal performance.

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 reliable and high-performance engines and components. Their product range includes a variety of parts and systems designed to enhance the efficiency and durability of commercial vehicles.

Threaded Plug 3679954 Compatibility with Cummins Engines

The Threaded Plug 3679954, manufactured by Cummins, is designed to fit seamlessly with several of their engine models. This part is crucial for maintaining the integrity of the engine’s sealing and fluid systems. Here is a detailed look at its compatibility:

ISB4.5 CM2350 B104 and QSK95 CM2350 K111/K113

The Threaded Plug 3679954 is specifically engineered to fit the ISB4.5 CM2350 B104 engine. This plug is essential for securing various fluid lines and ensuring that the engine operates efficiently. Similarly, it is compatible with the QSK95 CM2350 K111 and QSK95 CM2350 K113 engines, where it serves the same purpose of maintaining fluid integrity and preventing leaks.

ISF3.8 CM2220 AN

For the ISF3.8 CM2220 AN engine, the Threaded Plug 3679954 is a critical component. It is used in various fluid systems within the engine, ensuring that all connections are secure and leak-free. This plug is designed to withstand the operational stresses of the engine, providing long-lasting reliability.

ISX CM570

The ISX CM570 engine also benefits from the Threaded Plug 3679954. This part is integral to the engine’s design, ensuring that all threaded connections are properly sealed. Its robust construction makes it suitable for the demanding conditions under which the ISX CM570 operates.

ISV (Nissan)

Although the ISV (Nissan) engine is not a Cummins engine, the Threaded Plug 3679954 is compatible with it. This compatibility extends the utility of the plug, allowing it to be used across a broader range of engines, providing a versatile solution for maintaining fluid integrity.

Each of these engines relies on the Threaded Plug 3679954 to maintain the necessary fluid seals and connections, ensuring optimal performance and longevity.

Role of Part 3679954 Threaded Plug in Engine Systems

The Part 3679954 Threaded Plug is an essential component in various engine systems, ensuring the integrity and efficiency of multiple subsystems. Its primary function is to seal and secure openings within the engine, preventing leaks and maintaining system pressures.

Block and Cylinder

In the engine block and cylinder, the Threaded Plug is used to seal small passages and openings. This ensures that the lubricating oil remains within the system, preventing leaks that could lead to reduced lubrication efficiency and increased wear on moving parts.

Cooler and Engine Oil Systems

Within the cooler and engine oil systems, the Threaded Plug plays a significant role in maintaining the integrity of the oil pathways. It seals connections in the oil filter cooler head and the lubricating oil cooler module, ensuring that oil flows smoothly without any external leakage. This is particularly important in high-performance engines where maintaining optimal oil pressure is vital for engine health.

Cover and Front Gear

The cover and front gear components often have small openings that require sealing to prevent debris ingress and oil leakage. The Threaded Plug is installed in these areas to ensure that the internal environment remains clean and that the oil system operates efficiently.

Front Sprocket and Front Cover

In the front sprocket and front cover, the Threaded Plug is used to seal passages that connect to the front gear cover. This helps in maintaining the structural integrity of the cover and ensures that the lubrication system within the front end of the engine remains effective.

Filter and Fuel Systems

The fuel filter and fuel filter head utilize the Threaded Plug to seal connections and prevent fuel leaks. In the fuel system, maintaining a sealed environment is essential to ensure consistent fuel delivery and to prevent any fuel from escaping, which could pose a safety hazard.

Lubricating Oil Cooler Module and Manifold

In the lubricating oil cooler module and manifold, the Threaded Plug is critical for sealing connections that facilitate the flow of oil to and from the cooler. This ensures that the oil cooling process is efficient and that the engine operates within optimal temperature ranges.

Water and Multiduct Connection

For water systems and multiduct connections, the Threaded Plug ensures that coolant pathways are sealed, preventing leaks that could lead to inefficient cooling and potential engine overheating.

Oil Filter and Oil Systems

In the oil filter and broader oil systems, the Threaded Plug is used to seal various connections within the pan and plumbing systems. This includes the oil cooler water plumbing and the turbocharger oil plumbing, ensuring that oil pressure is maintained and that the lubrication system functions correctly.

Fuel Drain and Plumbing Systems

Finally, in the fuel drain and various plumbing systems, the Threaded Plug is employed to seal connections that are vital for the efficient drainage of fuel and the smooth operation of fuel lines. This ensures that the fuel system remains pressurized and that fuel delivery is consistent.

Conclusion

The Cummins 3679954 Threaded Plug is a vital component in maintaining the efficiency and reliability of commercial truck engines. Its role in sealing various systems and preventing leaks ensures that the engine operates optimally. Proper installation, regular maintenance, and understanding its compatibility with different engine models are essential for maximizing the benefits of this Cummins part.