3007636
Expansion Plug
Cummins®

The Cummins 3007636 Expansion Plug is a critical component designed for use in commercial truck operations. Its primary function is to provide a secure seal in various applications within the truck’s systems, ensuring the integrity and efficiency of the truck’s operational systems, particularly within the engine and cooling systems ¹.

Basic Concepts of Expansion Plugs

An expansion plug is a type of fastener that expands when installed, creating a tight seal. This is achieved through a tapered design that, when driven into a pre-drilled hole, causes the plug to expand against the walls of the hole. This mechanism ensures a robust and secure fit, preventing leaks and maintaining system pressure ². Expansion plugs are commonly used in automotive and industrial applications to seal openings in engines, cooling systems, and other components where a permanent seal is required.

Role of the 3007636 Expansion Plug in Truck Operation

The Cummins 3007636 Expansion Plug plays a specific role in the operation of a truck by providing a secure seal in the engine or cooling system. This plug is designed to fit into designated openings, expanding to create a tight seal that prevents fluid leaks and maintains system pressure. Its function is vital for the proper operation of the truck, ensuring that fluids remain within the system and do not escape, which could lead to system failure or reduced efficiency ³.

Key Features

The Cummins 3007636 Expansion Plug is characterized by several key features that enhance its performance. It is made from high-quality materials that offer durability and resistance to corrosion. The design of the plug includes a tapered body that expands upon installation, ensuring a secure fit. Additionally, the plug may feature a unique threading or locking mechanism to prevent accidental removal, further enhancing its reliability in demanding truck operations ⁴.

Benefits

The use of the Cummins 3007636 Expansion Plug offers several benefits in truck operations. It contributes to improved system integrity by providing a reliable seal that prevents leaks. This enhances the overall performance and efficiency of the truck’s engine and cooling systems. The plug’s durable construction and resistance to corrosion ensure long-term reliability, reducing the need for frequent replacements and maintenance. Furthermore, its secure fit helps maintain system pressure, which is crucial for the optimal operation of the truck ⁵.

Troubleshooting and Maintenance

Common issues with the Cummins 3007636 Expansion Plug may include leaks due to improper installation or wear over time. To address these issues, it is recommended to inspect the plug regularly for signs of wear or damage. If a leak is detected, the plug should be removed and replaced with a new one to ensure a secure seal. Proper installation techniques, including using the correct tools and following manufacturer guidelines, are crucial to prevent issues. Regular maintenance and inspection will help ensure the longevity and optimal performance of the expansion plug .

Compatibility of Expansion Plug 3007636 with Cummins Engines

The Expansion Plug 3007636, manufactured by Cummins, is designed to fit a variety of Cummins engines. Below is a detailed breakdown of its compatibility across different engine models:

G-Series Engines

• G5.9
• G5.9 CM558
• G8.3
• G8.3 CM558
• G855
• G855 CM558
• GTA855 CM558 (CM2358) G101

ISB/ISD Engines

• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN

ISBE Engines

• ISBE CM2150
• ISBE CM800
• ISBE4 CM850

ISX Engines

• ISX CM570
• ISX CM870
• ISX CM871
• ISX15 CM2250

N-Series Engines

• N14 CELECT PLUS
• N14 G
• N14 MECHANICAL

QSC and QSK Engines

• QSC8.3 CM850 (CM2850)
• QSK95 CM2350 K111

NH/NT Engines

• NH/NT 855

4B and 6B Engines

• 4B3.9
• 6B5.9
• 6C8.3

This expansion plug is engineered to ensure a secure fit and optimal performance across these diverse engine models, providing a reliable solution for maintaining and repairing Cummins engines .

Role of Part 3007636 Expansion Plug in Engine Systems

The 3007636 Expansion Plug is integral to the functionality and maintenance of various engine components. It ensures the integrity of the system by preventing unwanted fluid or gas leakage, thereby maintaining optimal performance and efficiency.

Auxiliary Cooling System

In the auxiliary cooling system, the expansion plug is used to seal off passages that are not in use, ensuring that coolant flows only through the active cooling circuits. This helps in maintaining consistent coolant temperature and pressure, which is vital for the engine’s thermal management.

Crosshead

Within the crosshead, the expansion plug is employed to seal lubrication points, preventing oil leakage and ensuring that the crosshead receives adequate lubrication. This is essential for reducing friction and wear on the connecting components.

Cylinder (Top Level Assembly) Head and Cylinder Head

In both the cylinder (top level assembly) head and the cylinder head, the expansion plug is used to seal off coolant or oil passages that are not required during specific engine operations. This ensures that the head remains pressurized and cool, enhancing overall engine performance and longevity.

Cylinder Block and Cylinder Block Hardware/Kit

The expansion plug plays a significant role in the cylinder block by sealing off coolant and oil galleries. In the cylinder block hardware kit and cylinder block kit, it ensures that these passages remain intact during engine assembly and disassembly, preventing fluid loss and contamination.

EBM: Performance Parts and EBM: Parts

For EBM performance parts and EBM parts, the expansion plug is utilized to fine-tune the flow of fluids within high-performance engine setups. It helps in optimizing the engine’s cooling and lubrication systems, contributing to enhanced performance and reliability.

Engine Oil Cooler and Lubricating Oil Cooler Mounting

In the engine oil cooler and lubricating oil cooler mounting, the expansion plug is used to seal off bypass routes, ensuring that oil flows through the cooler efficiently. This maintains the oil at an optimal temperature, which is crucial for engine protection and performance.

Oil Cooler Repair Kit and Oil Cooler Support

During repairs involving the oil cooler repair kit and oil cooler support, the expansion plug is essential for sealing off sections of the cooling system that are being worked on. This prevents coolant loss and ensures that the system remains pressurized.

Oil Fill Arrangement

In the oil fill arrangement, the expansion plug is used to seal off unnecessary passages, ensuring that the oil fill process is efficient and that the engine receives the correct amount of lubrication.

Performance Parts and Service Kit

For performance parts and service kits, the expansion plug is a key component in ensuring that the engine’s cooling and lubrication systems are sealed correctly. This is particularly important during maintenance and upgrades, where system integrity must be maintained.

Thermostat Housing

In the thermostat housing, the expansion plug helps in sealing off coolant passages, ensuring that the thermostat can regulate temperature effectively. This is vital for maintaining the engine’s operating temperature within safe limits.

Turbocharger and Turbocharger Arrangement

In turbocharger and turbocharger arrangement setups, the expansion plug is used to seal off lubrication points and coolant passages. This ensures that the turbocharger operates within its designed parameters, enhancing performance and reliability.

Turbocharger Location and Valve Cover

Finally, in the turbocharger location and valve cover, the expansion plug is employed to seal off any unnecessary passages, ensuring that the engine’s lubrication and cooling systems function optimally. This contributes to the overall efficiency and durability of the engine.

Conclusion

The Cummins 3007636 Expansion Plug is a vital component in the maintenance and operation of commercial trucks. Its role in providing secure seals within engine and cooling systems ensures the integrity and efficiency of these systems. The plug’s durable construction, resistance to corrosion, and secure fit make it a reliable solution for preventing leaks and maintaining system pressure. Regular maintenance and proper installation techniques are essential for ensuring the longevity and optimal performance of this Cummins part.

References