4903443
Threaded Plug
Cummins®

Introduction

The Threaded Plug 4903443 is a component manufactured by Cummins, a prominent entity in the commercial vehicle industry. This plug is integral to the maintenance and operation of commercial trucks, ensuring the integrity of various systems by effectively sealing openings or passages.

Basic Concepts of Threaded Plugs

Threaded plugs are mechanical components used to seal openings or passages in various systems. They are screwed into place, creating a secure seal that prevents the escape of fluids or gases. These plugs are essential in maintaining the functionality and safety of mechanical systems by ensuring that internal pressures are maintained and external contaminants are kept out ¹.

Purpose of Threaded Plug 4903443

The Threaded Plug 4903443 is designed to play a specific role in the operation of a truck. It is used in areas where sealing is required to maintain system integrity, such as in the engine block, transmission, or hydraulic systems. Its application ensures that fluids remain contained within the system, preventing leaks that could lead to system failure or contamination ².

Key Features

The Threaded Plug 4903443 is characterized by several key features that enhance its performance 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, and its design specifications are tailored to meet the demands of commercial truck applications ³.

Benefits

Using the Threaded Plug 4903443 offers several advantages. It contributes to improved system integrity by effectively sealing openings, which helps in preventing fluid leaks. This, in turn, enhances the overall reliability of the vehicle, reducing the risk of unexpected breakdowns and extending the lifespan of the truck’s components.

Installation Process

Installing the Threaded Plug 4903443 requires attention to detail to ensure proper function. The process involves cleaning the thread area, applying a suitable sealant if necessary, and screwing the plug into place. It is important to use the correct torque settings to avoid over-tightening, which could damage the threads, or under-tightening, which could lead to leaks. Ensuring full thread engagement is also critical for a secure seal.

Common Issues and Troubleshooting

Threaded plugs, including the 4903443, can encounter issues such as leaks or corrosion over time. Leaks may occur due to improper installation, damaged threads, or wear on the plug itself. Corrosion can be a problem in environments where the plug is exposed to moisture or chemicals. Troubleshooting these issues may involve re-tightening the plug, replacing damaged components, or applying a corrosion-resistant coating.

Maintenance Tips

To ensure the longevity and effectiveness of the Threaded Plug 4903443, regular maintenance is recommended. This includes periodic inspections for signs of wear or corrosion, cleaning the plug and surrounding area to remove contaminants, and ensuring that the plug is securely tightened. Following these practices can help prevent issues and maintain the plug’s performance over time.

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 has established a reputation for quality and innovation in the commercial vehicle industry. Its product range includes engines, powertrain components, and aftermarket parts, all designed to meet the demanding requirements of commercial applications ⁴.

Compatibility with Cummins Engines

The threaded plug part number 4903443, manufactured by Cummins, is designed to fit a variety of Cummins engines. This part is essential for sealing and securing threaded connections within the engine systems. Below is a detailed description of its compatibility across different engine models.

ISM Series Engines

• ISM CM570
• ISM CM570/870
• ISM CM876
• ISM11 CM876 SN

L10 Series Engines

• L10 CELECT
• L10 GAS
• L10 MECHANICAL

M11 Series Engines

• M11 CELECT
• M11 CELECT PLUS
• M11 MECHANICAL

N14 Series Engines

• N14 CELECT
• N14 CELECT PLUS
• N14 MECHANICAL

QSM11 Series Engines

• QSM11 CM570
• QSM11 CM876

QSN14 Series Engines

• QSN14 CM876 N103

NH/NT 855

Role of Part 4903443 Threaded Plug in Engine Systems

The part 4903443 Threaded Plug is instrumental in maintaining the integrity and functionality of various engine systems. In the Accessory (Top Level Assembly) Drive, it ensures that the connections between the drive components are sealed, preventing leaks and maintaining efficient operation.

Within the Accessory Drive and Accessory Drive Housing, the threaded plug plays a significant role in securing and sealing the pathways through which fluids or gases travel, thus ensuring that the drive components operate without contamination or loss of pressure.

In the Air Compressor and Compressor Air systems, the threaded plug is used to seal off ports and passages, maintaining the required pressure levels and ensuring that the compressor functions efficiently. This is particularly important in the Compressor Air system where consistent pressure is essential for optimal performance.

For the Front Gear Train Accessory Drive, the threaded plug helps in sealing the gear housing, preventing lubricant leakage and ensuring that the gears remain well-lubricated for smooth operation.

In the Fuel Pump and Fuel Pump Drive systems, the threaded plug is vital for sealing the fuel lines and pump housing. This ensures that fuel is delivered consistently without leaks, which is essential for the reliable operation of the fuel pump.

Lastly, in the EBM: Drive and Gear Accessory Drive Shaft, the threaded plug secures and seals critical points, ensuring that the drive shaft and associated components operate efficiently and without lubricant loss.

Overall, the part 4903443 Threaded Plug is a key component in ensuring the sealed integrity of various engine systems, contributing to their reliable and efficient operation.

Conclusion

The Threaded Plug 4903443 by Cummins is a critical component in the maintenance and operation of commercial trucks. Its role in sealing various engine systems ensures the integrity and functionality of these systems, contributing to the overall reliability and efficiency of the vehicle. Regular maintenance and proper installation are essential to maximize the benefits of this Cummins part.