3902425
Sealing Washer
Cummins®

Introduction

The Sealing Washer 3902425 by Cummins is engineered to fulfill a specific role within the mechanical systems of commercial trucks. Its primary function is to establish a dependable seal between components, thereby preventing leaks and ensuring the integrity of the system it is part of. Within the context of truck operations, this washer contributes to maintaining the efficiency and reliability of the truck’s mechanical systems.

Basic Concepts of Sealing Washers

Sealing washers are components utilized in mechanical systems to create a seal between two or more parts. They function by filling the gap between surfaces, preventing the escape of fluids or gases and blocking the ingress of contaminants. Sealing washers are extensively applied in various mechanical systems, including engines, transmissions, and hydraulic systems, to ensure the system operates within its designed parameters ¹.

Role of Sealing Washer 3902425 in Truck Operation

The Sealing Washer 3902425 is strategically positioned within the truck’s mechanical system to ensure a secure seal between specific components. Its placement and interaction with other parts are essential for the proper functioning of the system. By providing a barrier against leaks, it helps maintain the system’s pressure and prevents contamination, which can lead to decreased performance or failure of the system ².

Key Features

The Sealing Washer 3902425 is characterized by several key features that enhance its performance. It is made from materials that offer durability and resistance to the operating conditions within a truck’s mechanical system. Its design attributes, such as thickness and outer diameter, are tailored to fit specific applications, ensuring a snug fit and effective seal. Additionally, any unique characteristics, such as anti-rotation features or specific surface treatments, further contribute to its reliability and performance.

Benefits

The use of the Sealing Washer 3902425 in truck operations offers several benefits. It contributes to improved efficiency by ensuring that the system operates within its designed parameters without leaks. Its durability ensures long-term reliability, reducing the need for frequent replacements. Furthermore, by preventing contamination and maintaining system pressure, it plays a role in enhancing the overall reliability of the truck’s mechanical systems.

Troubleshooting and Maintenance

To ensure the longevity and optimal performance of the Sealing Washer 3902425, regular maintenance and troubleshooting are recommended. Common issues may include wear and tear or damage due to operating conditions. Regular inspections can help identify potential problems early, allowing for timely replacements or repairs. Additionally, following manufacturer guidelines for installation and use can help prevent issues related to improper fitting or usage ³.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and quality, Cummins serves commercial truck, bus, construction, agricultural, and industrial markets. Its reputation in the commercial truck industry is built on a commitment to reliability, performance, and customer satisfaction, making it a preferred choice for parts and systems in the sector.

Cummins Engine Part 3902425: Sealing Washer

The Cummins part number 3902425, a Sealing Washer, is a critical component used in various Cummins engines. This part is designed to provide a secure seal in the engine’s assembly, ensuring optimal performance and preventing leaks. The following engines utilize this sealing washer:

15N Series

• 15N CM2380 M104B

4B Series

• 4B3.9
• B3.9 G

6B Series

• 6B5.9
• B5.9 G
• B5.9 GAS PLUS CM556

6C Series

• 6C8.3
• C8.3 G

B Series

• B4.5
• B5.9 CM2670 B166C
• B5.9 CM2670 B164C

C Series

• C GAS PLUS CM556

D Series

• D4.0 CM2620 D103B

F Series

• F2.8 CM2620 F135B
• F3.8 CM2350 F120B
• F3.8 CM2620 F137B
• F3.8 F102
• F4.5 CM2620 F139B
• F4.5 CM2620 F141C

G Series

• G5.9
• G5.9 CM558
• G8.3
• G8.3 CM558
• GTA8.3 CM558

ISB Series

• ISB CM2150

This sealing washer is integral to the engine’s assembly, ensuring that all components fit together securely and function as intended. Its application across various engine series highlights its versatility and importance in maintaining engine integrity.

Role of Part 3902425 Sealing Washer in Engine Systems

The part 3902425 Sealing Washer is an essential component in various engine systems, ensuring the integrity and efficiency of the engine’s operation. Its application spans across multiple critical areas, contributing to the overall performance and reliability of the engine.

Air Fuel Control Plumbing

In the air fuel control plumbing, the Sealing Washer 3902425 is used to create a tight seal between components, preventing any leaks of air or fuel. This ensures that the air-fuel mixture is delivered accurately to the combustion chamber, optimizing engine performance and fuel efficiency.

Air Intake Manifold

Within the air intake manifold, the Sealing Washer plays a role in sealing connections and joints. This prevents air leaks, which can disrupt the air-fuel ratio and lead to inefficient combustion. A proper seal ensures that the manifold operates under designed conditions, enhancing engine responsiveness and power output.

Coolant Temperature Sensor

When installed near the coolant temperature sensor, the Sealing Washer 3902425 helps maintain a secure connection, ensuring accurate temperature readings. This is vital for the engine control unit (ECU) to make precise adjustments to fuel delivery and ignition timing based on real-time temperature data.

Cylinder Head and Cylinder Head Kit

In the cylinder head and cylinder head kit, the Sealing Washer is utilized to seal various passages and connections. This prevents coolant or oil leaks, which could lead to engine overheating or contamination of the combustion process. A reliable seal is fundamental for maintaining the cylinder head’s integrity and performance.

Flywheel Housing

The flywheel housing often requires precise sealing to prevent oil leaks. The Sealing Washer 3902425 is employed here to ensure that the housing remains oil-tight, protecting the flywheel and surrounding components from contamination and ensuring smooth operation.

Fuel Plumbing

In fuel plumbing systems, the Sealing Washer is critical for maintaining the integrity of fuel lines and connections. It prevents fuel leaks, which are not only a performance issue but also a safety concern. A secure seal ensures that fuel is delivered consistently to the injectors.

Gasket Full Engine Set and Upper/Lower Engine Gasket Kits

The Sealing Washer 3902425 complements the gasket full engine set and upper/lower engine gasket kits by providing additional sealing at specific points where standard gaskets may not offer sufficient coverage. This enhances the overall sealing strategy of the engine, reducing the risk of leaks and improving engine longevity.

Heater Kit and Injector Plumbing

In the heater kit and injector plumbing, the Sealing Washer ensures that connections remain leak-free. This is particularly important in the heater kit to prevent coolant leaks, and in injector plumbing to ensure precise fuel delivery without any loss.

Oil Pan Retrofit Kit and Oil Pan

For the oil pan retrofit kit and the oil pan itself, the Sealing Washer is used to seal connections and fittings. This prevents oil leaks, which can lead to lubrication issues and potential engine damage. A secure seal ensures that the oil pan maintains adequate oil levels for engine lubrication.

Oil Bypass Filter

In the oil bypass filter system, the Sealing Washer is employed to ensure that the filter housing remains sealed. This prevents oil from bypassing the filter, ensuring that contaminants are effectively removed from the oil, prolonging engine life.

Performance Parts and Seal Kit

When integrating performance parts and using a seal kit, the Sealing Washer 3902425 provides additional sealing where needed. This is particularly important in high-performance applications where even minor leaks can significantly impact engine performance and reliability.

Set Gasket Cylinder Head and Upper Engine Gasket Sets

The Sealing Washer works in conjunction with set gasket cylinder head and upper engine gasket sets to provide comprehensive sealing across the engine. This ensures that all critical connections and passages are sealed, contributing to the engine’s overall efficiency and durability.

Conclusion

In summary, the part 3902425 Sealing Washer is a versatile component that enhances the sealing integrity across various engine systems, playing a significant role in maintaining engine performance, efficiency, and reliability.