3679334
Expansion Plug
Cummins®

Introduction

The Expansion Plug 3679334, a component manufactured by Cummins, is a critical part in the commercial truck industry. Designed specifically for commercial trucks, this Cummins part plays a vital role in maintaining the integrity of various systems within the vehicle ¹.

Basic Concepts of Expansion Plugs

An expansion plug is an essential device in automotive applications, used to seal openings in engine blocks, transmission cases, and other components. Upon installation, it expands to create a tight seal, preventing the leakage of fluids and gases. This mechanism is crucial for maintaining system pressure and ensuring the proper operation of vehicle components ².

Role of the 3679334 Expansion Plug in Truck Operation

Positioned within the truck’s system, the 3679334 Expansion Plug seals specific openings, such as those in the engine block or transmission case. Its primary function is to maintain system integrity by preventing the escape of fluids and gases, which is vital for the efficient operation of the truck. Proper placement and function of this plug contribute significantly to the overall performance and reliability of the vehicle ³.

Key Features

The 3679334 Expansion Plug is characterized by its durable material composition, typically including metals that offer resistance to high temperatures and pressures. Its design allows for easy installation and a secure fit within the designated openings. A unique expansion mechanism ensures a tight seal, differentiating it from other expansion plugs.

Benefits

The use of the 3679334 Expansion Plug offers several benefits. It contributes to improved system integrity by effectively sealing openings and preventing leaks. The design of the plug facilitates ease of installation, reducing the time and effort required for maintenance tasks. Additionally, its durable construction ensures long-term performance, providing reliability over the lifespan of the truck.

Troubleshooting and Maintenance

Common issues associated with expansion plugs include leaks due to improper installation or wear over time. Troubleshooting steps may involve inspecting the plug for signs of damage or wear and ensuring it is correctly installed. Regular maintenance practices, such as checking the condition of the plug during routine inspections, can help ensure its longevity and effectiveness.

About Cummins

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. The company’s product range includes engines, powertrain components, and aftermarket parts, all designed to meet the demanding requirements of commercial vehicles.

Compatibility with Cummins Engines

The Expansion Plug 3679334 is designed to fit a variety of Cummins engines. This part is crucial for maintaining the integrity of the engine’s cooling system by preventing leaks and ensuring proper sealing.

ISX Series Engines

The ISX CM570, ISX CM870, and ISX CM871 engines are part of the ISX series, known for their robust performance and reliability. The Expansion Plug 3679334 is compatible with these models, ensuring that the cooling system remains sealed and efficient.

ISX15 Series Engines

The ISX15 CM2250 engine, which belongs to the ISX15 series, also utilizes the Expansion Plug 3679334. This part is essential for maintaining the cooling system’s integrity in this high-performance engine.

QSX15 Series Engines

The QSX15 CM2250 and QSX15 CM2250 ECF engines are part of the QSX15 series, designed for heavy-duty applications. The Expansion Plug 3679334 fits these engines, providing the necessary sealing to prevent leaks and maintain optimal cooling system performance.

The QSX15 CM2350 X105 engine, another variant in the QSX15 series, also requires the Expansion Plug 3679334. This part ensures that the engine’s cooling system remains sealed and functions correctly under demanding conditions.

By using the Expansion Plug 3679334, these engines can maintain their efficiency and longevity, ensuring that the cooling system operates without leaks or failures.

Role of Part 3679334 Expansion Plug in Engine Systems

The expansion plug, identified by part number 3679334, is integral to maintaining the structural integrity and operational efficiency of various engine components.

• Air Compressor: The expansion plug is utilized to seal off unused passages or ports, ensuring that the compressor operates at optimal efficiency by preventing air leaks and maintaining consistent pressure levels.
• Cylinder (Kit) Block: The expansion plug serves to fill any unnecessary openings, which helps in preserving the block’s structural integrity. This is particularly important in high-stress environments where the cylinder block is subject to significant thermal and mechanical loads.
• Cylinder Block: The expansion plug is employed to seal off coolant or oil passages that are not in use. This ensures that the fluids remain within their designated pathways, which is essential for effective cooling and lubrication of the engine components.
• Cylinder Block Hardware Kit: The expansion plug is often included to provide a versatile solution for sealing various openings across different cylinder block configurations. This enhances the kit’s applicability across a range of engine designs.
• Cylinder Block Kit: The inclusion of the expansion plug ensures that all components within the kit can be properly sealed, contributing to the overall reliability and performance of the engine assembly.
• Engine Barring Drive: The expansion plug may be used to seal off areas where barring operations take place. This prevents any unintended fluid leakage or air ingestion, which could otherwise interfere with the barring process and potentially lead to engine damage.

Conclusion

The Expansion Plug 3679334 by Cummins is a vital component in the maintenance and operation of commercial trucks. Its role in sealing various engine components ensures the integrity and efficiency of the vehicle’s systems. With its durable construction and easy installation, this part contributes significantly to the reliability and performance of Cummins engines across different series, including ISX, ISX15, and QSX15.