4920470
Threaded Plug
Cummins®

Introduction

The Cummins 4920470 Threaded Plug is a component designed for use in commercial truck operations. It plays a role in maintaining the integrity and efficiency of truck systems by providing sealing and pressure management capabilities. This plug is integral to ensuring that various systems within a truck operate smoothly and reliably.

Basic Concepts of Threaded Plugs

Threaded plugs are mechanical components used to seal openings in pipes, engine blocks, and other systems. They function by being screwed into a threaded hole, creating a secure seal that prevents fluid or gas leakage. In automotive and industrial settings, threaded plugs are employed to maintain system pressure, prevent contamination, and ensure the overall integrity of the system ¹.

Purpose of the Cummins 4920470 Threaded Plug

The Cummins 4920470 Threaded Plug is specifically designed to play a role in sealing and pressure management within truck systems. It is used to close off openings in engine blocks, transmission cases, and hydraulic systems, ensuring that these systems remain sealed and operate under the correct pressure conditions. This plug contributes to the overall system integrity by preventing leaks and maintaining the necessary pressure levels ².

Key Features

The Cummins 4920470 Threaded Plug is characterized by several key features that enhance its functionality and durability. It is made from high-quality materials that resist corrosion and wear, ensuring long-term reliability. The plug features a specific thread type that ensures a secure fit within the threaded holes it is designed to seal. Additionally, its design specifications are tailored to withstand the demanding conditions found in commercial truck operations.

Benefits

Using the Cummins 4920470 Threaded Plug offers several advantages. It contributes to improved system performance by ensuring that systems remain sealed and operate under the correct pressure. The plug’s durable construction and resistance to corrosion enhance its longevity, reducing the need for frequent replacements. Furthermore, its reliable performance in demanding conditions ensures that truck systems operate efficiently and reliably.

Installation Process

Installing the Cummins 4920470 Threaded Plug requires careful attention to ensure correct fitting and function. The process involves cleaning the threaded hole to remove any debris, applying a thread sealant if necessary, and screwing the plug into the hole until it is securely in place. It is important to use the appropriate tools and follow manufacturer guidelines to ensure the plug is installed correctly.

Common Applications

The Cummins 4920470 Threaded Plug is commonly used in various applications within truck systems. It is often found in engine blocks, where it seals openings to prevent coolant or oil leaks. In transmission cases, the plug helps maintain system pressure and prevent fluid leaks. Additionally, it is used in hydraulic systems to ensure that these systems remain sealed and operate efficiently.

Troubleshooting and Maintenance

To ensure the longevity and optimal performance of the Cummins 4920470 Threaded Plug, it is important to be aware of common issues such as leaks or corrosion. Regular inspections can help identify these problems early, allowing for timely maintenance or replacement. Maintenance practices, such as cleaning the plug and its surrounding area, can help prevent corrosion and ensure that the plug continues to function effectively.

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 is committed to quality and innovation in the automotive industry. The company offers a wide range of products designed to meet the needs of various industries, including commercial trucking, construction, and agriculture. Cummins’ commitment to excellence is evident in its product range, which is known for reliability, performance, and durability.

Threaded Plug 4920470 Compatibility with Cummins Engines

The Threaded Plug 4920470, manufactured by Cummins, is a component that fits seamlessly with a variety of Cummins engine models. This part is designed to ensure proper sealing and functionality in the engines it is compatible with. Below is a detailed breakdown of the engines that this threaded plug fits, grouped where applicable:

ISX Series Engines

• ISX CM570
• ISX CM870
• ISX CM871

These ISX series engines are known for their robust performance and reliability. The threaded plug 4920470 is engineered to fit these models, ensuring that they maintain their operational integrity.

ISX15 Series Engines

• ISX15 CM2250
• ISX15 CM2250 SN
• ISX15 CM2350 X101

The ISX15 series engines are designed for heavy-duty applications, and the threaded plug 4920470 is a crucial part of their assembly. It ensures that these engines can handle the rigors of demanding environments.

QSX15 Series Engines

• QSX15 CM2250
• QSX15 CM2250 ECF
• QSX15 CM2350 X105

The QSX15 engines are engineered for superior fuel efficiency and power. The threaded plug 4920470 is compatible with these models, providing the necessary sealing and support for their complex systems.

X15 Series Engines

• X15 CM2350 X116B
• X15 CM2350 X123B
• X15 CM2450 X134B

The X15 series engines are designed for versatility and performance across various applications. The threaded plug 4920470 fits these engines, ensuring they operate smoothly and efficiently.

This threaded plug is a vital part of the engine’s design, ensuring that all the engines listed above maintain their operational standards and reliability.

Role of Part 4920470 Threaded Plug in Engine Systems

The 4920470 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:

Connecting Rod and Piston

In the connecting rod and piston assembly, the 4920470 Threaded Plug is often used to seal passages or ports within the connecting rod. This ensures that lubricants and coolants remain within their designated pathways, preventing leaks that could lead to reduced efficiency or damage to the piston.

Cylinder Head

Within the cylinder head, the threaded plug is utilized to seal off coolant or oil passages. This is vital for maintaining the integrity of the cooling and lubrication systems, ensuring that the cylinder head operates within optimal temperature ranges and remains well-lubricated.

Cylinder Top Level Assembly Head

In the cylinder top level assembly head, the 4920470 Threaded Plug helps in sealing any unnecessary passages or holes. This contributes to the overall pressure integrity of the cylinder, ensuring that combustion gases are contained effectively during the power stroke.

Engine Piston

When incorporated into the engine piston design, the threaded plug can be used to seal small passages or vents. This helps in maintaining the structural integrity of the piston and ensures that any lubricants intended for the piston rings remain in place.

Head

In the engine head, the threaded plug is commonly employed to seal off coolant or oil galleries. This ensures that the head remains cool and well-lubricated, which is essential for prolonging the lifespan of the head and maintaining engine performance.

Cylinder RA (Cylinder Repair Assembly)

In a cylinder repair assembly, the 4920470 Threaded Plug is used to seal any drilled holes or passages that are no longer in use. This is particularly important in repair scenarios where modifications to the cylinder may have been made.

Injector

Although less common, the threaded plug can be used in injector assemblies to seal off passages that are not in use. This ensures that the injector operates efficiently without any unintended fluid leaks.

Overhaul Kit

In an overhaul kit, the threaded plug is included to address any sealing requirements during a comprehensive engine rebuild. It ensures that all passages are properly sealed, contributing to the overall reliability of the rebuilt engine.

Performance Parts

In performance engine builds, the 4920470 Threaded Plug is often used to seal off passages in aftermarket cylinder heads or blocks. This ensures that the performance parts operate under optimal conditions, contributing to enhanced engine performance and reliability.

Conclusion

The Cummins 4920470 Threaded Plug is a critical component in maintaining the integrity and efficiency of truck systems. Its role in sealing and pressure management ensures that various systems within a truck operate smoothly and reliably. The plug’s durable construction, resistance to corrosion, and compatibility with a wide range of Cummins engines make it a valuable asset in commercial truck operations. Regular maintenance and timely replacement of the plug are essential to ensure the longevity and optimal performance of truck systems.