3963984
Sealing Washer
Cummins®

Introduction

The Sealing Washer 3963984 by Cummins is engineered to fulfill a critical role within the mechanical systems of commercial trucks. Its primary function is to provide a secure seal in various applications, ensuring that fluids and gases remain contained within their designated pathways. This part contributes to maintaining the integrity of the truck’s systems by preventing leaks, which can lead to inefficiencies and potential damage. Understanding its purpose and function is essential for appreciating its significance in commercial truck operations.

Basic Concepts of Sealing Washers

Sealing washers are components used in mechanical systems to create a seal between two surfaces. They function by filling the gap between mating parts, thereby preventing the escape of fluids or gases. These washers are utilized in a wide range of applications, from simple plumbing fixtures to complex engine systems. The materials used in sealing washers vary, with common choices including rubber, silicone, and metal. Each material offers distinct properties, such as flexibility, temperature resistance, and durability, which are selected based on the specific requirements of the application ¹.

Role of Sealing Washer 3963984 in Truck Operation

In the context of truck operation, the Sealing Washer 3963984 is associated with systems where fluid or gas containment is crucial. It is often found in fuel systems, hydraulic systems, and engine components. By ensuring a tight seal, this washer contributes to the efficient operation of these systems. Its role is vital in maintaining system pressure, preventing contamination, and ensuring that the truck operates within its designed parameters ².

Key Features

The Sealing Washer 3963984 is characterized by several key features that enhance its performance. Its design is tailored to fit specific applications, ensuring a snug fit and effective seal. The material composition is chosen for its ability to withstand the operational conditions it will face, including temperature variations and exposure to various fluids. Unique characteristics, such as resistance to wear and deformation, further contribute to its reliability and longevity.

Benefits

Utilizing the Sealing Washer 3963984 offers several benefits. It contributes to improved system efficiency by ensuring that fluids and gases remain within their intended pathways. This part also plays a role in enhancing the longevity of the systems it is part of, by preventing leaks that could lead to damage or reduced performance. Furthermore, its reliable performance helps in reducing maintenance costs associated with leaks and system failures.

Troubleshooting and Maintenance

To ensure the Sealing Washer 3963984 continues to perform optimally, regular inspection and maintenance are recommended. Common issues may include wear, deformation, or failure to create a seal, which can often be identified through visual inspection or system performance checks. Maintenance tips include replacing the washer at recommended intervals or when signs of wear are detected. Proper installation is also crucial to ensure the washer functions as intended.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions. With a history of innovation and quality, Cummins has established a strong reputation in the commercial truck industry. The company’s commitment to quality is evident in its manufacturing processes and the durability of its products, including components like the Sealing Washer 3963984. Cummins’ focus on innovation ensures that its products meet the evolving needs of the industry, providing reliable and efficient solutions for commercial truck operators.

Cummins Engine Part 3963984: Sealing Washer Application

The Cummins part 3963984, a Sealing Washer, is a critical component in ensuring the integrity and performance of various Cummins engine models. This sealing washer is designed to provide a tight, leak-proof seal in numerous applications across different engine series.

6 Series Engines

• 6B5.9
• 6C8.3

The 6 Series engines, including the 6B5.9 and 6C8.3, benefit from the Sealing Washer 3963984 in several critical areas, such as sealing oil passages and preventing leaks in high-pressure systems.

B Series Engines

• B6.7 CM2350 B135B
• B6.7 CM2670 B153B
• B6.7 CM2670 B164C

The B Series engines, particularly the B6.7 models, utilize the 3963984 Sealing Washer in various sealing applications. This part is crucial for maintaining the engine’s operational efficiency by preventing fluid leaks in critical areas.

ISB Series Engines

• ISB CM2150
• ISB/ISD6.7 CM2150 SN
• ISB4.5 CM2350 B104
• ISB5.9 CM2880 B110
• ISB6.7 CM2250
• ISBE CM2150
• ISBE4 CM850

The ISB Series engines, ranging from the ISB4.5 to the ISB6.7, incorporate the Sealing Washer 3963984 in numerous sealing applications. This part is essential for maintaining the integrity of the engine’s sealing systems, ensuring optimal performance and longevity.

ISC Series Engines

• ISC CM554
• ISC CM850

The ISC Series engines, including the ISC CM554 and ISC CM850, utilize the 3963984 Sealing Washer in various sealing applications. This part is vital for preventing leaks and maintaining the engine’s operational efficiency.

ISL Series Engines

• ISL CM554
• ISL9 CM2150 SN

The ISL Series engines, such as the ISL CM554 and ISL9 CM2150 SN, incorporate the Sealing Washer 3963984 in several sealing applications. This part is crucial for ensuring the engine’s sealing systems function correctly, preventing leaks and maintaining performance.

QSB Series Engines

• QSB4.5 CM2250 EC
• QSB5.9 CM2880 B115
• QSB6.7 CM2250
• QSB6.7 CM2350 B105
• QSB6.7 CM850 (CM2850)
• QSB6.7 M CM2250
• QSB7 CM2880 B117

The QSB Series engines, including the QSB4.5 to the QSB7, utilize the Sealing Washer 3963984 in various sealing applications. This part is essential for maintaining the engine’s sealing systems, ensuring optimal performance and longevity.

QSC and QSL Series Engines

• QSC8.3 CM554
• QSL9 CM554

The QSC and QSL Series engines, such as the QSC8.3 CM554 and QSL9 CM554, incorporate the Sealing Washer 3963984 in several sealing applications. This part is crucial for preventing leaks and maintaining the engine’s operational efficiency.

Role of Part 3963984 Sealing Washer in Engine Systems

The 3963984 Sealing Washer is an essential component in various engine systems, ensuring the integrity and efficiency of fluid transfer and containment.

Fuel System Integration

In the fuel system, the 3963984 Sealing Washer is utilized at critical junctions such as the fuel inlet and fuel filter plumbing. It ensures a tight seal between the fuel injection pump and the fuel pump, preventing any fuel leakage. This washer is also integral in the connections within the fuel filter, maintaining the purity of the fuel by preventing contaminants from entering the system.

Lubrication and Cooling Systems

For the lubricating oil supply tube and the turbocharger coolant plumbing, the 3963984 Sealing Washer plays a significant role. It secures the connections, ensuring that the lubricating oil reaches all moving parts without leakage, thus enhancing the longevity and performance of the engine components. In the turbocharger coolant system, it helps maintain the optimal temperature of the turbocharger, enhancing its efficiency and durability.

Transmission and Upper Engine Components

Within the transmission system, this sealing washer is employed to ensure that the fluid transfer is seamless and without leaks, which is vital for the smooth operation of the transmission. In the upper engine gasket kit, it is used to seal the connections between various engine components, ensuring that the engine operates efficiently without any fluid loss.

Additional Applications

The 3963984 Sealing Washer is also found in the plumbing for the cabin heater and the turbocharger, where it ensures that the flow of fluids is maintained without any interruptions. It is also used in the connections for the engine coolant system, helping to maintain the engine’s temperature within the desired range.

Vent and Drain Systems

In vent and drain systems, the 3963984 Sealing Washer ensures that these systems operate efficiently without any fluid leakage, which is essential for the overall health and performance of the engine.

Accessories and Fittings

Lastly, in various accessories and fittings throughout the engine system, the 3963984 Sealing Washer ensures that all connections are secure, contributing to the overall reliability and performance of the engine.

Conclusion

The Sealing Washer 3963984 by Cummins is a vital component in the maintenance and operation of commercial truck engines. Its role in ensuring secure seals across various engine systems contributes to the efficiency, longevity, and reliability of these engines. Regular maintenance and proper installation of this part are crucial for optimal performance and to prevent potential issues related to fluid and gas leaks.