3040995
Threaded Plug
Cummins®

The Cummins 3040995 Threaded Plug is a component designed for use in commercial trucks. It serves a specific function within the truck’s mechanical systems, contributing to the overall maintenance and operational efficiency of the vehicle. Understanding its purpose and significance is important for ensuring the truck operates effectively and reliably.

Basic Concepts of Threaded Plugs

A threaded plug is a fastener with external threads that is screwed into a matching internal thread. It is used to seal openings in mechanical systems, preventing the escape of fluids or gases and keeping contaminants out. In the automotive industry, threaded plugs are commonly employed in engines, transmissions, and other systems where sealing is necessary ¹.

Purpose of the Cummins 3040995 Threaded Plug

The Cummins 3040995 Threaded Plug is specifically designed to seal openings within a truck’s engine or other systems. Its role is to maintain the integrity of the system by preventing leaks and ensuring that the internal environment remains free from external contaminants. This contributes to the efficient operation of the truck and helps in maintaining the performance of the engine and other components ².

Key Features

The Cummins 3040995 Threaded Plug is constructed from materials that offer durability and resistance to corrosion. It features a specific thread type that ensures a secure fit within the corresponding internal threads. Unique design elements may include a tapered seat or O-ring groove, which enhance the seal’s effectiveness and contribute to the plug’s overall performance and longevity.

Benefits

Using the Cummins 3040995 Threaded Plug offers several advantages. It contributes to improved system integrity by providing a reliable seal. This can lead to enhanced performance of the truck’s engine and other systems. Additionally, the plug’s durable construction and effective sealing properties contribute to its longevity, reducing the need for frequent replacements.

Installation Process

Installing the Cummins 3040995 Threaded Plug requires the use of appropriate tools to ensure a secure fit. The process involves cleaning the threads, applying a thread sealant if necessary, and screwing the plug into place with the correct torque specification. Following best practices during installation helps to ensure that the plug functions effectively and maintains a secure seal.

Troubleshooting Common Issues

Common issues with threaded plugs may include leaks or improper sealing. These problems can often be addressed by inspecting the plug and threads for damage, ensuring the correct torque was used during installation, and verifying that the sealing surfaces are clean and free from debris. In some cases, replacing the plug or addressing issues with the mating threads may be necessary.

Maintenance Tips

Regular maintenance of the Cummins 3040995 Threaded Plug is important for ensuring optimal performance and longevity. This includes periodic inspection for signs of wear or damage, cleaning the plug and sealing surfaces as needed, and verifying that the plug remains securely in place. Adhering to recommended inspection intervals and maintenance procedures helps to prevent issues and ensures the plug continues to function effectively.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and a broad product range, Cummins is recognized for its quality and reliability in the automotive and heavy-duty truck industry. The company’s commitment to excellence is reflected in its products, including the Cummins 3040995 Threaded Plug.

Compatibility with Cummins Engines

The Cummins Threaded Plug part number 3040995 is a versatile component designed to fit a variety of Cummins engines. This plug is essential for sealing and securing various points in the engine’s system, ensuring optimal performance and preventing leaks. Below is a detailed description of its compatibility with specific Cummins engines:

6C8.3 and C8.3 G Engines

The 6C8.3 and C8.3 G engines benefit from the 3040995 threaded plug, which is used in several critical areas of the engine. This plug is typically employed in fuel systems, coolant passages, and other fluid pathways to maintain integrity and prevent leaks.

B5.9 and B5.9 G Engines

For the B5.9 and B5.9 G engines, the 3040995 threaded plug is used in various applications, including fuel and oil systems. Its robust design ensures a secure fit, which is crucial for maintaining engine efficiency and longevity.

B5.9 GAS PLUS CM556 and C GAS PLUS CM556 Engines

The B5.9 GAS PLUS CM556 and C GAS PLUS CM556 engines also utilize the 3040995 threaded plug in their fuel and coolant systems. This plug’s precision ensures that these engines operate smoothly and efficiently.

B6.7 CM2670 B164C Engine

The B6.7 CM2670 B164C engine incorporates the 3040995 threaded plug in several key areas, including fuel and oil systems. This plug’s compatibility with this engine ensures that it can handle the demands of heavy-duty applications.

ISB CM550, ISC CM2150, ISC CM554, ISC CM850, and ISM CM570 Engines

The 3040995 threaded plug is a critical component for the ISB CM550, ISC CM2150, ISC CM554, ISC CM850, and ISM CM570 engines. It is used in various fluid systems, ensuring that these engines maintain their performance and reliability.

ISC8.3 CM2250, ISL CM554, ISL9 CM2150 SN, ISL9.5 CM2880 L138, and ISM CM570/870 Engines

These engines, including the ISC8.3 CM2250, ISL CM554, ISL9 CM2150 SN, ISL9.5 CM2880 L138, and ISM CM570/870, also rely on the 3040995 threaded plug. This plug is essential for maintaining the integrity of the fuel and oil systems, ensuring that these engines perform optimally.

ISM CM876, ISM11 CM876 SN, ISX15 CM2250, ISX15 CM2250 SN, and ISX15 CM2350 X101 Engines

The ISM CM876, ISM11 CM876 SN, ISX15 CM2250, ISX15 CM2250 SN, and ISX15 CM2350 X101 engines use the 3040995 threaded plug in various fluid systems. This plug’s compatibility with these engines ensures that they can handle the demands of high-performance applications.

K19 and KTA19GC CM558 Engines

The K19 and KTA19GC CM558 engines also incorporate the 3040995 threaded plug in their fuel and oil systems. This plug’s precision ensures that these engines can operate efficiently and reliably in demanding conditions.

Role of Part 3040995 Threaded Plug in Engine Systems

The Part 3040995 Threaded Plug is an essential component in various engine systems, contributing to the overall functionality and efficiency of the engine. Here’s how it integrates with different components:

• Afterheater Plumbing: The threaded plug ensures secure sealing within the afterheater plumbing system, preventing leaks and maintaining the integrity of the heated air supply to the engine.

• Air Fuel Mixer: In the air fuel mixer, the threaded plug helps in maintaining the precise mixture of air and fuel, which is vital for optimal combustion efficiency and performance.

• Air Intake Plumb Manifold: The plug is used to seal connections in the air intake plumb manifold, ensuring a consistent airflow into the engine, which is crucial for maintaining engine power and efficiency.

• Turbocharger Arrangement: Within the turbocharger setup, the threaded plug seals various connections, helping to maintain the boost pressure and ensuring the turbocharger operates within its designed parameters.

• Engine Block and Cylinder: The plug is utilized in the engine block and cylinder to seal off unused passages or ports, preventing coolant or oil leaks and maintaining the structural integrity of these components.

• Coolers (Engine Oil and Marine Gear Oil): In both engine oil and marine gear oil coolers, the threaded plug is employed to seal connections, ensuring the cooling systems operate efficiently without leaks.

• Front Gear Cover and RKR Lever Reducing Front Cover: These covers often require sealing at various points, and the threaded plug provides a reliable solution to prevent oil leaks and maintain the lubrication system’s integrity.

• Cylinder Head: The plug is used in the cylinder head to seal off passages or ports that are not in use, ensuring the head gasket and combustion chamber remain intact.

• Rear Gear Train Accessory Drive: In this complex system, the threaded plug ensures that all connections are sealed properly, preventing lubricant leaks and maintaining the efficiency of the gear train.

• EBM Cover and Valve: The plug is essential in sealing the EBM (Exhaust Brake Module) cover and valve, ensuring the module functions correctly without any exhaust leaks.

• Fuel Control Module and Lubricating Mounting Cooler: These components require precise sealing to function correctly, and the threaded plug provides the necessary security to maintain their operational integrity.

• Oil Cooler Housing and Oil Filter/Cooler: The plug is used to seal various connections in the oil cooler housing and oil filter/cooler, ensuring the oil system remains leak-free and operates efficiently.

• Corrosion Resistor: In systems where corrosion resistance is crucial, the threaded plug helps in sealing connections, protecting the system from environmental factors.

• Rocker Lever Reducing Front Cover and Rocker Top Level Assembly Cover: These covers need reliable sealing to maintain the lubrication and operational integrity of the rocker arms.

• Engine Monitoring System: The plug is used in the engine monitoring system to seal various sensors and connections, ensuring accurate data collection and system performance.

• Thermostat Housing Plumbing: In the thermostat housing, the plug ensures that the plumbing connections are sealed, maintaining the thermostat’s ability to regulate engine temperature effectively.

• Torque Converter Oil Cooler: The plug seals connections in the torque converter oil cooler, ensuring the cooling system operates without leaks, which is essential for the transmission’s performance.

Conclusion

The Cummins 3040995 Threaded Plug is a critical 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. Regular maintenance and proper installation are key to maximizing the benefits of this part.