3040814
Threaded Plug
Cummins®

Introduction

The Cummins 3040814 Threaded Plug is a component utilized in the maintenance and operation of commercial trucks. 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 is important for maintaining 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 widely used in automotive applications to prevent fluid leaks, protect against contaminants, and maintain system pressure ¹.

Purpose of the Cummins 3040814 Threaded Plug

The Cummins 3040814 Threaded Plug plays a role in sealing specific ports within a truck’s engine or other systems. Its primary function is to prevent the escape of fluids or gases, ensuring that the system operates under the correct pressure and without leaks. This plug is integral to maintaining the integrity of the system it is installed in, contributing to the truck’s overall performance.

Key Features

The Cummins 3040814 Threaded Plug is characterized by several key features that enhance its performance and durability. It is made 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 designated port. Its design specifications are tailored to meet the demands of commercial truck applications, providing reliable sealing under various operating conditions ².

Benefits

Using the Cummins 3040814 Threaded Plug offers several advantages. It contributes to improved system integrity by effectively sealing ports, preventing fluid leaks that could lead to system failure. Additionally, it helps maintain the correct pressure within the system, enhancing overall engine performance. The plug’s durable construction ensures long-term reliability, reducing the need for frequent replacements.

Installation Process

Installing the Cummins 3040814 Threaded Plug requires careful attention to ensure a proper fit. The process involves cleaning the port to remove any debris, applying a thread sealant if necessary, and screwing the plug into place using the appropriate tools. It is important to follow the manufacturer’s guidelines to avoid over-tightening, which could damage the plug or the port.

Common Issues and Troubleshooting

Common issues with threaded plugs include leaks due to improper seating or damage to the plug or port. Troubleshooting these problems may involve inspecting the plug and port for damage, ensuring the correct thread sealant is used, and verifying that the plug is properly tightened. Addressing these issues promptly can prevent more significant problems and ensure the system’s continued reliability.

Maintenance Tips

Regular maintenance of the Cummins 3040814 Threaded Plug is crucial for its longevity and performance. This includes periodic inspections for signs of wear or damage, ensuring the plug remains securely in place, and replacing it if necessary. Following the manufacturer’s recommendations for inspection intervals and replacement can help maintain the plug’s effectiveness and the system’s integrity.

Manufacturer Information - Cummins

Cummins Inc. is a leading manufacturer in the automotive industry, known for its high-quality components and commitment to innovation. With a rich history of producing reliable and efficient automotive parts, Cummins has established a reputation for excellence. The company’s dedication to quality and performance is evident in its wide range of products, including the Cummins 3040814 Threaded Plug ³.

Compatibility with Cummins Engines

The threaded plug part number 3040814, manufactured by Cummins, is designed to fit a variety of Cummins engines. This plug is commonly used in applications where a threaded opening needs to be sealed or closed. Below is a detailed breakdown of the engines with which this part is compatible:

6B Series Engines

• 6B5.9
• 6C8.3

B5.9 Series Engines

• B5.9 G
• B5.9 GAS PLUS CM556

C Series Engines

• C GAS PLUS CM556
• C8.3 G

ISB Series Engines

• ISB CM550
• ISB5.9G CM2180
• ISC CM554
• ISL CM554
• ISL G CM2180

ISM Series Engines

• ISM CM570/870
• ISM CM876

K Series Engines

• K19
• K38
• K50

KTA Series Engines

• KTA19GC
• KTA19GC CM558

L10 Series Engines

• L10 GAS
• L10 MECHANICAL

M11 Series Engines

• M11 CELECT PLUS
• M11 MECHANICAL

N14 Series Engines

• N14 MECHANICAL

NH/NT Series Engines

• NH/NT 855

QSB Series Engines

• QSB5.9 44 CM550

This threaded plug is engineered to ensure a secure fit and reliable performance across these diverse engine models, making it a versatile component for maintenance and repair purposes.

Role of Part 3040814 Threaded Plug in Engine Systems

The part 3040814 Threaded Plug is integral to the functionality and maintenance of various engine components. Its primary role is to seal and secure different parts within the engine system, ensuring optimal performance and preventing leaks.

Integration with Fuel System Components

• AFC Auto Fuel Pump: The threaded plug is used to seal connections and openings within the fuel pump system, maintaining fuel pressure and preventing leaks.
• EBM Pump: In the EBM pump setup, the threaded plug ensures that the pump housing remains sealed, which is vital for consistent fuel delivery.
• Fuel Pump & Drive (Bosch): It secures the connections between the fuel pump and drive mechanism, ensuring a tight seal that prevents fuel leakage.
• Fuel Connection: The plug is often used at fuel connection points to ensure a secure and leak-free interface between different fuel lines and components.
• Hardware Fuel Pump: It seals various openings and connection points within the hardware associated with the fuel pump, enhancing the system’s integrity.

Application in Cylinder and Block Assemblies

• Cylinder NH-855: The threaded plug is employed to seal openings in the cylinder, ensuring that combustion gases remain contained within the cylinder.
• Cylinder (Top Level Assembly) Head: It secures various ports and passages in the cylinder head, preventing coolant or oil leaks.
• Cylinder Block Kit: Within the cylinder block kit, the plug seals drill holes and passages, maintaining the structural integrity of the block.
• Cylinder Head: It is used to seal coolant and oil passages within the cylinder head, ensuring these fluids remain within their designated paths.

Role in Housing and Plumbing Systems

• Housing, Transmission: The plug seals various openings in the transmission housing, preventing fluid leaks and maintaining transmission fluid levels.
• Injector Plumbing: It ensures that the injector lines are sealed properly, preventing fuel leaks and maintaining consistent fuel pressure.
• Engine Brake Housing: The plug is used to seal the engine brake housing, ensuring that the brake system functions correctly without fluid loss.

Usage in Valve and Control Systems

• Valve, Timing Control: The threaded plug seals various ports and passages in the valve and timing control system, ensuring precise control over engine timing and valve operation.
• Check Valve: It secures the check valve housing, preventing backflow and ensuring that fluid or gas moves in the correct direction.

Additional Applications

• Cam Follower Housing: The plug seals the cam follower housing, ensuring that lubricants remain contained and the follower operates smoothly.
• Fuel Base: It is used to seal the fuel base, preventing fuel leaks and ensuring a stable fuel supply.
• Fuel Pump and Damper Mounting: The plug secures mounting points, ensuring that the fuel pump and damper are firmly in place and operate efficiently.
• Step White Smoke Kit: It seals various components within the kit, ensuring that all parts function correctly and emissions are controlled.
• ISM Certification: The plug is used in components that require ISM certification, ensuring that all sealed areas meet regulatory standards.
• Non AFC-Auto FP/A.B., Non AFC-Auto FP/B-C, Non Aftercooler - Auto: It seals various fuel pump and aftercooler components, ensuring they function correctly within the engine system.

Conclusion

The Cummins 3040814 Threaded Plug is a critical component in the maintenance and operation of commercial trucks. Its role in sealing various ports and systems within the engine ensures optimal performance, prevents leaks, and contributes to the overall reliability of the vehicle. Regular maintenance and proper installation are essential to maximize the effectiveness of this Cummins part.