139988
Rectangular Ring Seal
Cummins®

The Rectangular Ring Seal Part #139988 by Cummins is a specialized component designed for use in commercial truck operations. This seal plays a significant role in ensuring the integrity of fluid systems within trucks, contributing to their overall efficiency and reliability.

Basic Concepts of Rectangular Ring Seals

A Rectangular Ring Seal is a type of gasket designed to create a tight seal between two surfaces. It functions by being compressed between the mating surfaces, which causes it to deform and fill any irregularities, thus preventing the passage of fluids or gases. These seals are commonly used in various sealing systems due to their effectiveness and reliability. Materials used in their construction typically include rubber, elastomers, and sometimes metal, depending on the specific application requirements. The effectiveness of a Rectangular Ring Seal in creating a seal is based on its ability to deform under compression and return to its original shape when the pressure is released, ensuring a consistent seal over time ¹.

Purpose and Role in Truck Operation

This Cummins part is integral to the operation of commercial trucks by contributing to the sealing of fluid systems. It helps prevent leaks, which is vital for maintaining the integrity and efficiency of these systems. By ensuring that fluids remain contained within their designated pathways, the seal plays a role in preserving the performance and longevity of the truck’s components ².

Key Features

The 139988 is characterized by its robust design and material composition. It is typically made from high-quality elastomers that offer excellent resistance to wear and tear, as well as compatibility with a wide range of fluids commonly found in commercial trucks. Its rectangular shape allows for a larger sealing surface area compared to traditional O-rings, enhancing its sealing capabilities. Additionally, the seal is designed to withstand high pressures and temperatures, making it suitable for demanding applications ³.

Benefits

The benefits of using the 139988 include improved sealing efficiency, which leads to reduced fluid leaks and enhanced system performance. Its resistance to wear and tear ensures a longer service life, reducing the need for frequent replacements. Furthermore, its compatibility with various fluid systems commonly found in commercial trucks makes it a versatile choice for maintenance and repair operations.

Troubleshooting and Maintenance

Common issues with Rectangular Ring Seals may include signs of wear, leakage, or failure due to exposure to extreme conditions. Regular inspection of the seal for any signs of damage or degradation is recommended to ensure its continued effectiveness. Proper maintenance practices, such as cleaning the sealing surfaces before installation and ensuring correct torque during assembly, are crucial for the longevity and reliability of the seal. Replacement procedures should follow manufacturer guidelines to maintain system integrity.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration, and aftermarket parts. With a strong reputation in the commercial truck industry, Cummins is known for its commitment to quality, innovation, and customer satisfaction. The company’s product offerings are designed to meet the demanding requirements of commercial applications, ensuring reliability and performance. Cummins’ dedication to excellence is evident in the design and manufacturing of its automotive components, including the 139988 Rectangular Ring Seal.

Compatibility with Cummins Engines

The Rectangular Ring Seal, identified by the part number 139988, is a crucial component designed to ensure the integrity of various engine systems. This seal is engineered to fit seamlessly with a broad range of Cummins engines, providing a reliable barrier against leaks and maintaining system pressure.

ISM Series Engines

The Rectangular Ring Seal is compatible with several models within the ISM series:

• ISM CM570
• ISM CM570/870
• ISM CM876
• ISM11 CM876 SN

These engines, known for their robust performance and reliability, utilize the Rectangular Ring Seal to maintain the efficiency of their systems. The seal ensures that the engine operates smoothly by preventing unwanted fluid leaks and maintaining the necessary pressure levels.

ISX Series Engines

The ISX series engines also benefit from the Rectangular Ring Seal, including:

• ISX CM570
• ISX CM870
• ISX CM871

These engines are designed for heavy-duty applications, and the Rectangular Ring Seal plays a vital role in their operation by providing a tight seal that prevents leaks, thereby ensuring optimal performance and longevity.

K Series Engines

The K series engines, which include:

• K19
• K38
• K50

are equipped with the Rectangular Ring Seal to maintain system integrity. This seal is essential for these engines, as it helps in maintaining the required pressure and preventing leaks, ensuring the engines run efficiently.

L10 Series Engines

The L10 series engines, available in both CELECT and MECHANICAL variants, are:

• L10 CELECT
• L10 MECHANICAL

The Rectangular Ring Seal is integral to these engines, providing a reliable seal that ensures the system operates without leaks, thereby maintaining the engine’s efficiency and performance.

M11 Series Engines

The M11 series engines, which include:

• M11 CELECT
• M11 CELECT PLUS
• M11 MECHANICAL

are designed for a variety of applications, and the Rectangular Ring Seal is a critical component in these engines. It ensures that the system remains sealed, preventing leaks and maintaining the necessary pressure levels.

N14 Series Engines

The N14 series engines, available in CELECT, CELECT PLUS, and MECHANICAL variants, are:

• N14 CELECT
• N14 CELECT PLUS
• N14 MECHANICAL

The Rectangular Ring Seal is essential for these engines, providing a reliable seal that ensures the system operates without leaks, thereby maintaining the engine’s efficiency and performance.

NH/NT 855

The NH/NT 855 engine also utilizes the Rectangular Ring Seal to maintain system integrity and prevent leaks, ensuring the engine operates efficiently.

QSK Series Engines

The QSK series engines, which include:

• QSK19 CM500
• QSK45 CM500
• QSK60 CM500

are equipped with the Rectangular Ring Seal to ensure that the system remains sealed, preventing leaks and maintaining the necessary pressure levels.

QSM and QSN Series Engines

The QSM and QSN series engines, which include:

• QSM11 CM570
• QSM11 CM876
• QSN14 CM876 N103

also utilize the Rectangular Ring Seal to maintain system integrity and prevent leaks, ensuring the engine operates efficiently.

Role of Part 139988 Rectangular Ring Seal in Engine Systems

The Rectangular Ring Seal, part number 139988, is integral to ensuring the efficient and reliable operation of various engine systems. Its primary function is to create a secure seal between components, preventing leaks and maintaining system integrity.

In the context of the American Bosch Governor, the Rectangular Ring Seal is used to ensure that the governor’s components remain sealed, allowing for precise control over fuel delivery and engine speed. This seal is vital for maintaining the calibration of the governor, which is essential for optimal engine performance.

When dealing with Fuel Pump systems, particularly those involving calibration and code fuel, the Rectangular Ring Seal plays a significant role. It ensures that the fuel pump operates within specified parameters by maintaining a consistent seal around the pump components. This is especially important in systems like the EBM-Pump and EBM: Pump, where precise fuel delivery is necessary for engine efficiency.

In systems utilizing an Electronic Control Pressure Valve, the Rectangular Ring Seal helps maintain the integrity of the valve’s sealing surfaces. This ensures that the valve can regulate fuel pressure accurately, which is critical for the performance of the Fuel Control Module and Fuel Filters.

For components like the Governor Kit and Head and Damper, the Rectangular Ring Seal ensures that these parts function without leaks, which could otherwise lead to inefficiencies or failures in the engine’s fuel management system.

Conclusion

In summary, the Rectangular Ring Seal, part number 139988, is a fundamental component in various engine systems, ensuring that seals are maintained across a range of critical components, from governors and fuel pumps to control valves and filters. Its role in preventing leaks and maintaining system integrity is essential for the reliable operation of these engine systems.