3975774
O-Ring Seal
Cummins®

The 3975774 O-Ring Seal, manufactured by Cummins, is a specialized component designed for use in commercial trucks. Cummins, a well-established name in the automotive industry, produces a wide range of parts and systems for commercial vehicles, including the 3975774 O-Ring Seal. This seal is integral to maintaining the integrity of various systems within commercial trucks, ensuring efficient and reliable operation.

Basic Concepts of O-Ring Seals

An O-Ring Seal is a type of gasket with a circular cross-section, designed to create a seal between two or more parts. In mechanical systems, O-Rings play a role in preventing the leakage of fluids and gases by filling the gap between mating surfaces. They operate effectively in both dynamic and static applications, adapting to the movement of parts while maintaining a tight seal. The effectiveness of an O-Ring Seal depends on its material properties, the design of the sealing surfaces, and the environmental conditions it operates under ¹.

Purpose of the 3975774 O-Ring Seal in Truck Operations

This Cummins part is specifically designed to support the operation of commercial trucks by ensuring the integrity of seals in various systems. It is commonly applied in areas where fluid or gas containment is necessary, such as in the engine, transmission, and hydraulic systems. By providing a reliable seal, the 3975774 O-Ring Seal contributes to the efficient operation of these systems, helping to maintain performance and prevent leaks.

Key Features of the 3975774 O-Ring Seal

The 3975774 O-Ring Seal is characterized by its robust design and material composition, which includes resistance to a wide range of chemicals and temperatures. This durability ensures that the seal can withstand the demanding conditions found in commercial truck applications. Its precise fit and flexibility allow it to adapt to the contours of mating surfaces, providing a secure seal that is resistant to wear and degradation over time.

Benefits of Using the 3975774 O-Ring Seal

Utilizing the 3975774 O-Ring Seal in commercial trucks offers several advantages. It contributes to improved reliability of the sealing systems, reducing the likelihood of leaks and system failures. Additionally, its durable construction leads to reduced maintenance needs, as the seal is designed to withstand the rigors of truck operation without frequent replacement. Enhanced performance of the sealing systems is also observed, as the 3975774 O-Ring Seal ensures that fluids and gases are contained effectively, supporting the overall efficiency of the truck ².

Installation and Maintenance Guidelines

Proper installation of the 3975774 O-Ring Seal is crucial for its effectiveness. This involves preparing the sealing surfaces to ensure they are clean, smooth, and free from any contaminants that could compromise the seal. Careful handling of the O-Ring during installation is also important to avoid damage. For maintenance, regular inspection of the seal for signs of wear or degradation is recommended to ensure its continued effectiveness. Replacement should be considered if any damage is detected, to maintain the integrity of the sealing system.

Troubleshooting Common Issues

Common issues with O-Ring Seals in truck applications include leaks or failures, which can be caused by wear, improper installation, or exposure to incompatible chemicals or temperatures. Diagnostic steps involve inspecting the seal and its mating surfaces for damage or contamination. Remedial actions may include cleaning the surfaces, replacing the O-Ring Seal, or addressing any underlying issues that may have contributed to the failure.

Cummins: Manufacturer Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a strong reputation in the commercial truck industry, Cummins is known for its commitment to quality and innovation. The company’s extensive product range includes components like the 3975774 O-Ring Seal, which are designed to meet the high standards required for commercial vehicle applications. Cummins’ focus on quality ensures that its products, including O-Ring Seals, are reliable and perform well under the demanding conditions of truck operation.

Cummins O-Ring Seal Part 3975774 Compatibility

The Cummins O-Ring Seal part number 3975774 is designed to fit a variety of Cummins engines, ensuring a reliable seal in critical areas. This part is integral to maintaining the integrity of the engine’s sealing system, preventing leaks and ensuring optimal performance.

K50 Series

The K50 series engines include:

• K50
• QSK50 CM2150 K107
• QSK50 CM2150 MCRS
• QSK50 CM2350 K108

These engines benefit from the O-Ring Seal part 3975774, which is specifically engineered to fit the unique sealing requirements of the K50 series.

QSK38 Series

The QSK38 series engines include:

• QSK38 CM850 MCRS
• QSK38 CM2150 MCRS

The O-Ring Seal part 3975774 is compatible with these engines, providing a robust seal that is essential for maintaining engine efficiency and longevity.

QSK60 Series

The QSK60 series engine:

• QSK60 CM850 MCRS

This engine also utilizes the O-Ring Seal part 3975774, ensuring that it meets the stringent sealing requirements of the QSK60 series.

QSK95 Series

The QSK95 series engines include:

• QSK95 CM2350 K111
• QSK95 CM2350 K113

These engines are designed to work with the O-Ring Seal part 3975774, ensuring that they maintain their operational efficiency and reliability.

KTA38 Series

The KTA38 series engine:

• KTA38GC CM558

This engine is also compatible with the O-Ring Seal part 3975774, providing a critical seal that helps in maintaining the engine’s performance.

By ensuring that the O-Ring Seal part 3975774 is used in these engines, users can maintain the integrity of their sealing systems, prevent leaks, and ensure that their engines operate at peak efficiency.

Role of Part 3975774 O-Ring Seal in Engine Systems

The 3975774 O-Ring Seal is integral to the reliable operation of various engine systems, ensuring the integrity of connections and the efficiency of fluid transfer. Here’s how it fits within the specified components:

Auxiliary Cooling System

In the auxiliary cooling system, the O-Ring Seal is used at connection points to prevent leaks and maintain the system’s pressure. This includes the auxiliary cooling outlet where it ensures a tight seal, preventing coolant loss and maintaining optimal cooling performance.

Raw Water Inlet and Outlet Connections

At the raw water inlet and outlet connections, the O-Ring Seal plays a vital role in sealing the interfaces. This prevents raw water from mixing with other fluids or escaping, which could lead to corrosion or reduced cooling efficiency.

Water Pump and Housing

Within the water pump and its housing, the O-Ring Seal is employed to secure the connections between the pump and the housing. This ensures that coolant flows smoothly without any leaks, which is essential for consistent engine temperature regulation.

Thermostat and Thermostat Housing

In the thermostat and thermostat housing, the O-Ring Seal is critical for maintaining a seal around the thermostat. This ensures that the thermostat can accurately regulate the flow of coolant based on engine temperature, contributing to efficient engine operation.

Lower Pump Gasket Set and Upper Engine Gasket Kit

In both the lower pump gasket set and the upper engine gasket kit, the O-Ring Seal is used to ensure that gaskets fit snugly without any gaps. This is important for preventing coolant leaks and ensuring that the gaskets perform their intended function effectively.

Plumbing Connections

For charge air bypass, oil cooler water, and other plumbing connections, the O-Ring Seal is essential. It ensures that these systems remain sealed, allowing for efficient fluid transfer without contamination or loss.

HHP OVHL WTR Pump GSK and Water Pump Kit

In the HHP OVHL WTR Pump GSK and the water pump kit, the O-Ring Seal is used at various connection points to ensure that the pump operates efficiently. This includes sealing the water pump connection to prevent leaks and maintain system pressure.

Overall System Integrity

Across all these applications, the 3975774 O-Ring Seal contributes to the overall integrity of the engine’s cooling and lubrication systems. By ensuring secure, leak-free connections, it helps maintain the performance and longevity of the engine.

Conclusion

The 3975774 O-Ring Seal by Cummins is a critical component in the maintenance and operation of commercial truck engines. Its robust design, compatibility with a wide range of Cummins engines, and role in various engine systems highlight its importance in ensuring efficient and reliable truck operation. Proper installation, maintenance, and understanding of its applications are essential for maximizing the benefits of this Cummins part.