3935172
Sealing Washer
Cummins®

Introduction

The Cummins 3935172 Sealing Washer is a critical component designed to maintain the integrity of seals within commercial truck systems. Its primary function is to prevent leaks and ensure system efficiency by providing a secure seal between mating surfaces. This washer is essential for the reliable operation of trucks, contributing significantly to the overall performance and longevity of the vehicle.

Basic Concepts of Sealing Washers

Sealing washers are mechanical components used to create a seal between two surfaces, typically in fluid systems. They function by filling the gap between surfaces, preventing the escape of fluids or gases. The importance of sealing washers in mechanical systems cannot be overstated, as they help maintain system pressure, prevent contamination, and ensure the efficient operation of various components ¹.

Purpose of the Cummins 3935172 Sealing Washer

The Cummins 3935172 Sealing Washer is specifically designed for use in commercial truck applications. It ensures a tight seal in various truck systems, which is vital for the proper functioning of hydraulic, fuel, and cooling systems. Its application in these systems helps maintain system integrity and efficiency, contributing to the overall performance of the truck.

Key Features

The Cummins 3935172 Sealing Washer is characterized by several key features that enhance its performance. It is composed of durable materials that can withstand high pressures and temperatures commonly encountered in truck operations. The design attributes of this washer include precise dimensions and a smooth surface finish, which facilitate a secure and effective seal. Additionally, specialized coatings or treatments may be applied to improve its resistance to wear and corrosion.

Benefits of Using the Cummins 3935172 Sealing Washer

Utilizing the Cummins 3935172 Sealing Washer offers several advantages. It provides improved sealing efficiency, which helps maintain system pressure and prevent leaks. The durability of this washer ensures long-term performance in demanding truck environments. Furthermore, its reliability contributes to the consistent operation of truck systems, reducing the likelihood of unexpected failures.

Installation and Usage Guidelines

Proper installation of the Cummins 3935172 Sealing Washer is crucial for ensuring its effectiveness. To install this washer, first, ensure that the mating surfaces are clean and free of debris. Place the washer between the surfaces that require sealing, ensuring it is correctly aligned. Use the appropriate tools to secure the components in place, applying the necessary torque to achieve a proper seal without over-tightening, which could damage the washer or the surfaces.

Troubleshooting Common Issues

Common problems associated with sealing washers include leaks and wear. If a leak is detected, inspect the washer for signs of damage or improper installation. Replace the washer if necessary and ensure that the mating surfaces are clean and properly aligned. Wear can be addressed by replacing the washer with a new one and conducting regular inspections to identify any signs of degradation early.

Maintenance Tips

To prolong the lifespan of the Cummins 3935172 Sealing Washer, regular maintenance practices are recommended. Inspect the washer during routine maintenance checks for signs of wear or damage. Follow the manufacturer’s guidelines for replacement intervals to ensure the washer remains in optimal condition. Additionally, keeping the mating surfaces clean and free of contaminants will help maintain the effectiveness of the seal.

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 strong reputation in the commercial truck industry for producing reliable and high-performance components. The company’s product range includes engines, powertrains, and aftermarket parts, all designed to meet the demanding requirements of commercial truck operations ².

Cummins Engine Sealing Washer 3935172 Compatibility

The Cummins Sealing Washer part number 3935172 is designed to ensure proper sealing and prevent leaks in various engine systems. This part is compatible with a range of Cummins engines, ensuring it can be used across multiple models for maintenance and repair purposes.

Compatible Engines

• 4B3.9
• 6B5.9
• 6C8.3
• B5.9 GAS PLUS CM556
• ISB CM550
• ISB CM850
• ISC CM554
• ISC CM850
• ISL CM554
• ISL9 CM2150 SN
• QSB5.9 44 CM550
• QSB5.9 CM850
• QSB6.7 CM850 (CM2850)
• QSC8.3 CM554
• QSL9 CM554

Engine Grouping

The engines listed above can be grouped based on their model series and specifications. Here’s a breakdown of the groupings:

• 4B3.9, 6B5.9, 6C8.3: These engines are part of the earlier Cummins model series, known for their robust design and reliability.
• B5.9 GAS PLUS CM556, ISB CM550, ISB CM850, ISC CM554, ISC CM850, ISL CM554, ISL9 CM2150 SN: These engines are part of the more recent ISB, ISC, and ISL series, which incorporate advanced technology for improved performance and efficiency.
• QSB5.9 44 CM550, QSB5.9 CM850, QSB6.7 CM850 (CM2850): These engines belong to the QSB series, designed for heavy-duty applications and known for their durability and power.
• QSC8.3 CM554, QSL9 CM554: These engines are part of the QSC and QSL series, which are tailored for specific industrial and construction applications, offering high torque and reliability.

Role of Part 3935172 Sealing Washer in Engine Systems

The part 3935172 Sealing Washer is an essential component in various engine systems, ensuring the integrity and efficiency of fluid transfer and containment. Its application spans across multiple subsystems, contributing to the overall performance and reliability of the engine.

Fuel System Integration

In the 4-Cylinder 24V Fuel Shut-Off Kit, the Sealing Washer is utilized to prevent leaks at connection points, ensuring that fuel is delivered consistently without interruption. Similarly, in the Base Fuel Pump and Bosch Fuel Pump Kit, it secures the couplings and connections, maintaining pressure and preventing fuel leakage.

The Fuel Injection Pump relies on the Sealing Washer to ensure that fuel is metered accurately and delivered under precise pressure. In the Fuel Plumbing system, it is employed at various joints and connections to maintain a sealed environment, crucial for the efficient transfer of fuel from the tank to the engine.

Pump and Valve Applications

The Sealing Washer is integral to the operation of the Fuel Pump and Fuel Shutoff Valve Kit. It ensures that these components can operate under varying pressures without the risk of fuel escape, which could lead to inefficient engine performance or safety hazards.

In the Horizontal 24V Fuel Shutoff system, the washer plays a role in maintaining the seal at the shutoff points, ensuring that fuel flow can be controlled effectively. The Lift Pump also benefits from the Sealing Washer, as it helps in maintaining the pressure required to transfer fuel from the tank to the main pump.

Gasket and Plumbing Systems

Within the Lower Engine Gasket Kit and Upper Engine Gasket Set, the Sealing Washer complements the gaskets by providing additional sealing at critical points, such as where pipes meet the engine block or where different materials interface.

In the Turbocharger Plumbing, the Sealing Washer is used to ensure that the high-pressure air lines remain sealed, preventing leaks that could reduce turbocharger efficiency and engine performance.

Additional Applications

The Sealing Washer is also found in the Solenoid Kit, where it ensures that electrical connections remain secure and free from corrosion. In the Transmission system, it is used to seal fluid lines, contributing to the smooth operation of the transmission by preventing fluid leaks.

Overall, the part 3935172 Sealing Washer is a versatile component that enhances the functionality and reliability of various engine systems by ensuring secure, leak-free connections.

Conclusion

The Cummins 3935172 Sealing Washer is a vital component in maintaining the integrity and efficiency of commercial truck systems. Its durable construction, precise design, and reliable performance make it an essential part for ensuring the proper functioning of hydraulic, fuel, and cooling systems. Proper installation, regular maintenance, and timely replacement are key to maximizing the benefits of this washer, contributing to the overall performance and longevity of the vehicle.