3963987
Sealing Washer
Cummins®

Introduction

The Cummins 3963987 Sealing Washer is a component designed for use in commercial trucks. It serves a specific function within the truck’s mechanical systems, contributing to the overall efficiency and reliability of the vehicle. Understanding its purpose and role is fundamental for maintaining and optimizing truck performance.

Basic Concepts of Sealing Washers

Sealing washers are mechanical components used to create a seal between two surfaces. They function by filling the gap between mating parts, preventing the leakage of fluids or gases. In mechanical systems, sealing washers are crucial for maintaining system integrity and efficiency. They are commonly used in engines, transmissions, and hydraulic systems to ensure that fluids remain contained within their designated pathways ¹.

Purpose of the Cummins 3963987 Sealing Washer

The Cummins 3963987 Sealing Washer plays a role in the operation of commercial trucks by ensuring the integrity of seals within the engine or other systems. It is designed to fit precisely within the truck’s mechanical components, providing a barrier that prevents fluid leakage. This function is vital for maintaining the efficiency and reliability of the truck’s systems, as it helps to ensure that fluids are directed correctly and do not escape, which could lead to system failure or reduced performance ².

Key Features

The primary characteristics of the Cummins 3963987 Sealing Washer include its material composition, which is typically designed to withstand the high pressures and temperatures found within a truck’s engine. Its design attributes, such as thickness and diameter, are tailored to fit specific applications, ensuring a snug fit and effective seal. Additionally, any unique properties that enhance its performance, such as resistance to wear or corrosion, contribute to its effectiveness in demanding environments.

Benefits

Using the Cummins 3963987 Sealing Washer offers several advantages. It contributes to improved system efficiency by ensuring that fluids are contained within their designated pathways. This containment helps to maintain the performance of the truck’s systems. Additionally, the washer’s design and material properties contribute to its longevity and reliability, reducing the need for frequent replacements and maintenance ³.

Installation and Usage

Proper installation of the Cummins 3963987 Sealing Washer is crucial for ensuring optimal performance and longevity. It should be installed according to the manufacturer’s guidelines, which may include specific torque settings or installation sequences. Careful handling and correct placement are necessary to avoid damage to the washer or the components it seals.

Troubleshooting and Maintenance

Common issues associated with sealing washers include wear, damage, or failure to create an effective seal. Regular inspection and maintenance can help identify problems early, allowing for timely replacement or repair. Maintenance practices, such as cleaning the washer and its mating surfaces before installation, can prolong the life of the sealing washer and ensure continued system integrity.

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 truck industry. Its product range includes engines, powertrain components, and aftermarket parts, all designed to meet the demanding requirements of commercial transportation.

Cummins Sealing Washer 3963987 Compatibility

The Cummins Sealing Washer part number 3963987 is designed to fit a variety of Cummins engines, ensuring a secure and leak-proof seal in various applications. This part is engineered to meet the stringent requirements of high-performance engines, providing durability and reliability.

Compatible Engines

• F2.8 CM2620 F135B
• F3.8 F102
• ISF2.8 CM2220 F117
• ISF2.8 CM2220 F129
• ISF3.8 CM2220 AN
• QSB6.7 M CM2250
• QSG12/X12 CM2350 G110

The sealing washer is particularly suited for the following groups of engines:

• ISF2.8 CM2220 Series:

  • ISF2.8 CM2220 F117
  • ISF2.8 CM2220 F129

• ISF3.8 CM2220 AN

These engines benefit from the sealing washer’s ability to maintain pressure integrity and prevent fluid leaks, ensuring optimal engine performance and longevity. The washer’s design allows it to be easily integrated into the engine’s sealing system, providing a critical barrier against contaminants and wear.

Role of Part 3963987 Sealing Washer in Engine Systems

The Part 3963987 Sealing Washer is an essential component in various engine systems, ensuring the integrity and efficiency of fluid transfer and pressure maintenance. Its application spans across several key components, each playing a distinct role in the overall functionality of the engine.

Compressor Coolant System

In the compressor coolant system, the Sealing Washer is utilized at connection points to prevent coolant leakage. This ensures that the coolant circulates efficiently, maintaining optimal temperatures for the compressor and other associated components.

Fuel System

Within the fuel system, particularly at the fuel filter head, the Sealing Washer plays a significant role. It ensures a tight seal between the filter and the fuel lines, preventing fuel leaks and maintaining consistent fuel pressure. This is vital for the engine’s performance and fuel efficiency.

Lower Engine Gasket Kit

In the lower engine gasket kit, the Sealing Washer is employed to seal various passages and connections. This prevents oil and other fluids from leaking, ensuring that the engine operates within its designed parameters and maintains lubrication where needed.

Plumbing and Quick Disconnect Connectors

For plumbing applications, especially with quick disconnect connectors, the Sealing Washer is critical. It provides a secure seal when connecting and disconnecting fluid lines, which is essential for maintenance and repair operations. This application ensures that there are no leaks during operation or when components are being serviced.

Marine Gear Oil Cooler

In marine applications, specifically with the gear oil cooler, the Sealing Washer is used to seal the connections between the cooler and the plumbing. This ensures that the oil remains within the system, cooling effectively and lubricating the gear components as intended.

Turbocharger System

In turbocharger systems, the Sealing Washer is used at various connection points to maintain the integrity of the boost pressure. This ensures that the turbocharger operates efficiently, providing the necessary air pressure to the engine for optimal performance.

Overall, the Part 3963987 Sealing Washer is a versatile component that enhances the reliability and efficiency of various engine systems by ensuring secure, leak-free connections.

Conclusion

The Cummins 3963987 Sealing Washer is a critical component in the maintenance and operation of commercial trucks. Its role in preventing fluid leaks and maintaining system integrity is vital for the efficiency and reliability of the vehicle. Proper installation, regular maintenance, and understanding its compatibility with various Cummins engines are essential for maximizing the benefits of this part.