3954861
Sealing Washer
Cummins®

Introduction

The Cummins 3954861 Sealing Washer is a component designed for use in commercial trucks. Manufactured by Cummins, a well-established name in the automotive and heavy-duty truck industry, this sealing washer serves a specific function within various truck systems to ensure optimal performance and reliability.

Basic Concepts of Sealing Washers

Sealing washers are mechanical components used to prevent leaks and maintain system integrity in various applications. They operate by creating a tight seal between two surfaces, typically where a fluid or gas passes through. This seal is crucial for preventing leaks, which can lead to system failure or inefficiency. Sealing washers are found in a wide range of mechanical systems, including automotive, hydraulic, and pneumatic systems ¹.

Purpose of the 3954861 Sealing Washer

The Cummins 3954861 Sealing Washer plays a role in the operation of commercial trucks by ensuring seals are maintained in critical areas. It is applied in various truck systems where fluid or gas transfer occurs, such as fuel lines, hydraulic systems, and engine components. By providing a reliable seal, it helps maintain system efficiency and prevent leaks that could lead to operational issues ².

Key Features

The Cummins 3954861 Sealing Washer is characterized by its material composition, which is designed to withstand the pressures and temperatures encountered in truck systems. Its design includes specific dimensions and a shape that allows it to fit snugly in its intended application, ensuring a secure seal. Additionally, it may possess unique attributes such as resistance to certain chemicals or enhanced durability, which contribute to its performance in demanding environments.

Benefits

Utilizing the Cummins 3954861 Sealing Washer offers several advantages. It contributes to improved system efficiency by ensuring that seals are maintained, which can lead to better overall truck performance. Its design and material composition enhance its longevity, reducing the frequency of replacements. Moreover, the reliability it offers in truck operations can lead to fewer downtimes and maintenance costs.

Installation and Usage

Proper installation of the Cummins 3954861 Sealing Washer is crucial for its effective function. It should be installed according to the manufacturer’s guidelines, ensuring it is correctly positioned and tightened to the specified torque. Best practices include inspecting the washer for any damage before installation and ensuring the mating surfaces are clean and free of debris. Common applications within truck maintenance include replacement in fuel lines, hydraulic systems, and engine components where seals need to be refreshed or repaired.

Troubleshooting and Maintenance

When troubleshooting issues related to sealing washers, it is important to check for signs of wear, damage, or improper installation. Maintenance tips to ensure the longevity of the Cummins 3954861 Sealing Washer include regular inspections for signs of wear or leaks and replacing it according to the manufacturer’s recommendations or when signs of degradation are observed. Proper maintenance can significantly extend the life of the sealing washer and the systems it serves.

Common Applications

The Cummins 3954861 Sealing Washer is typically applied in truck systems where fluid or gas transfer occurs. Common applications include fuel lines, where it ensures that fuel is delivered without leaks, hydraulic systems, where it maintains pressure and prevents fluid loss, and engine components, where it contributes to the sealing of various passages and connections.

Manufacturer - Cummins

Cummins is a reputable manufacturer in the automotive and heavy-duty truck industry, known for its wide range of products designed for commercial trucks. With a history of innovation and quality, Cummins has established itself as a leader in providing reliable and efficient components for the trucking industry. Their products, including the 3954861 Sealing Washer, are designed with the aim of enhancing truck performance, reliability, and efficiency.

Cummins Sealing Washer 3954861 Compatibility

The Cummins Sealing Washer part number 3954861 is designed to fit a variety of Cummins engines, ensuring a secure seal in various applications. This part is integral to maintaining the integrity of the engine’s sealing systems, preventing leaks and ensuring optimal performance.

F4.5 CM2620 F141C

This engine benefits from the sealing washer in applications requiring robust sealing solutions, particularly in high-pressure environments.

ISB (Chrysler), ISB CM850

The ISB engines, including the ISB CM850, utilize the sealing washer to maintain the integrity of their sealing systems, crucial for both performance and longevity.

ISG12 CM2880 G107

In the ISG12 CM2880 G107 engine, the sealing washer is essential for ensuring that the engine’s sealing systems remain effective, preventing leaks and maintaining pressure integrity.

QSB4.5 CM850 (CM2850), QSB5.9 CM850, QSB6.7 CM850 (CM2850)

The QSB series engines, including the QSB4.5 CM850, QSB5.9 CM850, and QSB6.7 CM850, rely on the sealing washer to maintain their sealing systems’ efficiency, ensuring optimal performance across various applications.

QSG12/X12 CM2350 G110

The QSG12/X12 CM2350 G110 engine incorporates the sealing washer to ensure that its sealing systems are effective, preventing leaks and maintaining pressure integrity.

X11 CM2670 X126B, X12 CM2350 X119B, X12 CM2670 X121B

These engines use the sealing washer to maintain the efficiency of their sealing systems, crucial for both performance and longevity.

X12N CMMDG1 X143B, X13 CM2670 X122B, Z14 CM2670 Z103B

The sealing washer is also compatible with these engines, ensuring that their sealing systems remain effective, preventing leaks and maintaining pressure integrity.

Role of Part 3954861 Sealing Washer in Engine Systems

The Part 3954861 Sealing Washer is an essential component in ensuring the integrity and efficiency of various engine systems. Its primary function is to create a secure seal between different components, preventing leaks and maintaining system pressure. Here’s how it integrates with specific engine components:

Oil Pressure Switch

In the oil pressure switch system, the sealing washer ensures a tight seal between the switch and the engine block. This prevents oil from leaking out and maintains accurate pressure readings, which are vital for the engine’s lubrication system.

Module

When installed in a module, the sealing washer plays a key role in preventing fluid leaks within the module housing. This is particularly important in modules that handle sensitive fluids or require precise pressure maintenance, such as fuel injection modules.

Engine Control

In engine control systems, the sealing washer is used to seal connections between various sensors and the engine block. This ensures that the engine control unit (ECU) receives accurate data from these sensors, allowing for optimal engine performance and efficiency.

Pressure Switch Kit

Within a pressure switch kit, the sealing washer is crucial for maintaining the integrity of the switch’s seal. This ensures that the switch can accurately detect pressure changes within the system, which is essential for the proper functioning of the engine’s various pressure-sensitive components.

Sensor Adapter

When used with a sensor adapter, the sealing washer ensures that the connection between the sensor and the engine block is leak-proof. This is important for sensors that monitor critical parameters such as temperature, pressure, and fluid levels, ensuring that the data they provide is reliable and accurate.

Conclusion

In summary, the Part 3954861 Sealing Washer is a fundamental component in various engine systems, providing the necessary seals to prevent leaks and maintain system pressure, thereby contributing to the overall efficiency and reliability of the engine ³.