3920773
Sealing Washer
Cummins®

Introduction

The Sealing Washer 3920773 by Cummins is engineered to serve a critical function within the mechanical systems of commercial trucks. Its primary role is to provide a dependable seal between components, thereby preventing leaks and ensuring the efficient operation of the truck’s systems. This part is essential for maintaining the performance and longevity of various truck components by securing connections and preventing the escape of fluids or gases.

Basic Concepts of Sealing Washers

Sealing washers are mechanical components designed to create a seal between two or more parts. They function by filling the gap between surfaces, ensuring that fluids or gases do not leak out. These washers are typically made from materials that can withstand pressure, temperature variations, and chemical exposure. In mechanical systems, sealing washers are crucial for maintaining the integrity of connections and the overall efficiency of the system ¹.

Role of Sealing Washer 3920773 in Truck Operations

The Sealing Washer 3920773 plays a specific role in the operation of commercial trucks by ensuring secure and leak-proof connections in various systems. It is typically placed between flanges or within fittings where fluids or gases are transferred. By creating a tight seal, this washer helps maintain system pressure, prevent leaks, and ensure that the truck operates efficiently. Its interaction with other components is vital for the proper functioning of fuel, hydraulic, and cooling systems ².

Key Features

The Sealing Washer 3920773 is characterized by several key features that enhance its performance. It is made from high-quality materials that offer durability and resistance to wear and tear. The design specifications of this washer ensure a precise fit within the truck’s systems, providing a reliable seal. Additionally, it may feature unique attributes such as anti-extrusion properties, which prevent the washer from being forced out of place under high pressure.

Benefits

The use of the Sealing Washer 3920773 offers several benefits for commercial truck operations. It contributes to improved efficiency by ensuring that systems operate without leaks, which can lead to performance issues. The reliability of this washer reduces the likelihood of unexpected downtime due to seal failures. Furthermore, by preventing leaks and maintaining system integrity, it can lead to cost savings for fleet operators through reduced maintenance and repair needs ³.

Troubleshooting and Maintenance

Common issues associated with sealing washers include wear, deformation, and failure to create a proper seal. Troubleshooting these problems involves inspecting the washer for signs of damage, ensuring proper installation, and verifying that it is the correct size and type for the application. Regular maintenance practices, such as periodic inspection and replacement of worn washers, are crucial for ensuring the longevity and optimal performance of the Sealing Washer 3920773.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration systems, and related components. With a history spanning over a century, Cummins has established a strong reputation in the commercial truck industry for producing high-quality, reliable, and efficient products. The company’s commitment to innovation and customer satisfaction has made it a preferred choice for fleet operators worldwide.

Cummins Sealing Washer 3920773 Compatibility

The Cummins Sealing Washer part number 3920773 is designed to fit a variety of Cummins engines, ensuring a secure seal in various applications. This sealing washer is engineered to provide a reliable barrier against leaks, enhancing the overall performance and longevity of the engine. Below is a detailed breakdown of the engines with which this sealing washer is compatible:

4B3.9 and 6B5.9 Engines

The 4B3.9 and 6B5.9 engines are part of the earlier generation of Cummins diesel engines, known for their robust build and dependable performance. The sealing washer 3920773 is compatible with these engines, providing a critical seal in areas where leaks could otherwise occur, ensuring optimal engine efficiency.

6C8.3 and C8.3 G Engines

The 6C8.3 and C8.3 G engines are mid-range diesel engines that offer a balance of power and efficiency. The sealing washer 3920773 fits these engines, ensuring that all critical components are properly sealed, which is essential for maintaining engine integrity and performance.

B3.9 G, B4.5, B5.9, and B5.9 G Engines

These engines, including the B3.9 G, B4.5, B5.9, and B5.9 G, are part of the B-series lineup, known for their versatility and reliability in various applications. The sealing washer 3920773 is designed to fit these engines, providing a secure seal that helps prevent leaks and maintain engine performance.

B5.9 CM2670 B166C and B5.9 GAS PLUS CM556 Engines

The B5.9 CM2670 B166C and B5.9 GAS PLUS CM556 engines are high-performance models that require precise sealing to function correctly. The sealing washer 3920773 is compatible with these engines, ensuring that all critical areas are sealed, which is vital for maintaining engine efficiency and reliability.

C GAS PLUS CM556 and GTA38 G CMEICS G116C Engines

The C GAS PLUS CM556 and GTA38 G CMEICS G116C engines are specialized models that demand high-quality sealing solutions. The sealing washer 3920773 fits these engines, providing a reliable seal that helps prevent leaks and ensures optimal engine performance.

G5.9 and G8.3 Engines

The G5.9 and G8.3 engines are part of the G-series lineup, known for their durability and performance. The sealing washer 3920773 is compatible with these engines, ensuring that all critical components are properly sealed, which is essential for maintaining engine integrity and performance.

ISB Series Engines

The ISB series engines, including the ISB CM2150, ISB CM550, ISB CM850, ISB/ISD6.7 CM2150 SN, ISB3.9 CM2220 B107, ISB5.9 CM2880 B127, ISB5.9G CM2180, ISB6.7 CM2250, ISB6.7 CM2350 B101, ISBE CM2150, ISBE CM800, and ISBE4 CM850, are known for their versatility and reliability. The sealing washer 3920773 is designed to fit these engines, providing a secure seal that helps prevent leaks and maintain engine performance.

This comprehensive compatibility ensures that the sealing washer 3920773 is a versatile and reliable solution for a wide range of Cummins engines, enhancing their performance and longevity.

Role of Part 3920773 Sealing Washer in Engine Systems

The 3920773 Sealing Washer is an essential component in maintaining the integrity and efficiency of various engine systems. Its application spans across multiple critical areas, ensuring that each system operates within optimal parameters.

Air Intake Manifold Cover

In the air intake manifold cover, the 3920773 Sealing Washer is utilized to create a tight seal between the manifold and the engine block. This prevents air leaks, ensuring that the correct air-fuel mixture is maintained for combustion.

Compressor Coolant Arrangement

Within the compressor coolant arrangement, the sealing washer is positioned to maintain a secure seal around the coolant passages. This is vital for preventing coolant leaks and ensuring that the compressor operates at the correct temperature.

Turbocharger

In the turbocharger, the 3920773 Sealing Washer is employed to seal the connections between the turbocharger housing and the engine. This helps in maintaining the boost pressure and preventing any unwanted air or fluid leaks.

Exhaust Outlet

At the exhaust outlet, the sealing washer ensures a tight seal between the exhaust manifold and the engine block. This is important for preventing exhaust leaks, which can lead to decreased engine performance and increased emissions.

Engine Gasket Sets

In both the engine gasket set lower and the full engine gasket set, the 3920773 Sealing Washer is used extensively. It provides reliable sealing at various joints and connections, ensuring that the engine operates efficiently without any fluid or air leaks.

Oil Pan and Retrofit Kits

For the oil pan and oil pan retrofit kit, the sealing washer is crucial in creating a secure seal between the oil pan and the engine block. This prevents oil leaks and ensures that the lubrication system functions correctly.

Overhaul and Rebuild Kits

In overhaul kits and rebuild kits, the 3920773 Sealing Washer is included to ensure that all connections and joints are properly sealed during the engine rebuilding process. This is essential for the longevity and performance of the rebuilt engine.

Thermostat Housing

Within the thermostat housing, the sealing washer ensures that there are no coolant leaks. This maintains the engine’s operating temperature and ensures efficient thermostat function.

Transmission and Sensor Applications

In the transmission and at various sensor locations, such as the oxygen sensor, the 3920773 Sealing Washer is used to maintain secure seals. This is important for accurate sensor readings and smooth transmission operation.

Plumbing and Fuel Systems

In plumbing and fuel systems, the sealing washer is used to ensure that all connections are leak-free. This is vital for maintaining the integrity of the fuel delivery system and preventing any fuel leaks.

Piston Upgrade and Gasket Sets

For the PMM piston upgrade and in lower engine gasket kits, the 3920773 Sealing Washer plays a role in ensuring that all lower engine components are properly sealed. This contributes to the overall efficiency and performance of the engine.

Conclusion

The 3920773 Sealing Washer is a versatile component that enhances the functionality and reliability of various engine systems by providing essential seals at critical points. Its role in preventing leaks, maintaining system pressure, and ensuring efficient operation makes it an indispensable part of commercial truck maintenance and engine performance.