3686728
Rectangular Ring Seal
Cummins®

The 3686728 Rectangular Ring Seal is a component manufactured by Cummins, a well-established name in the commercial truck industry. This seal is designed for use in commercial trucks, where it plays a role in ensuring the integrity of various systems by preventing leaks and maintaining pressure ³.

Basic Concepts of Rectangular Ring Seals

A Rectangular Ring Seal is a type of gasket that provides a seal between two or more parts in mechanical systems. It functions by creating a barrier that prevents the escape of fluids or gases. These seals are commonly used in applications where there is a need for a reliable seal under high pressure or in environments with significant temperature variations ¹.

Purpose of the 3686728 Rectangular Ring Seal

The 3686728 Rectangular Ring Seal is utilized in the operation of trucks to maintain the efficiency of specific systems. It is often found in fuel systems, where it helps to ensure that fuel lines remain sealed, thus preventing leaks and maintaining system pressure. Additionally, it supports other systems where a reliable seal is necessary for optimal performance ³.

Key Features

This Cummins part is characterized by several key features. It is made from a durable material that can withstand the harsh conditions found in commercial truck environments. The design of the seal allows it to conform to the surfaces it contacts, providing a tight seal. Additionally, it may have unique characteristics such as resistance to certain chemicals or the ability to operate within a specific temperature range ².

Benefits

Using the 3686728 Rectangular Ring Seal offers several advantages. It contributes to improved performance of the truck’s systems by ensuring that seals remain intact under various operating conditions. The seal’s durability helps to reduce the frequency of replacements, and its reliability in maintaining seals leads to fewer disruptions in truck operations ³.

Installation Process

Installing the 3686728 Rectangular Ring Seal requires careful attention to detail. The process involves cleaning the mating surfaces to ensure a proper fit, positioning the seal correctly, and then securing it in place. Tools such as seal installation tools may be required to ensure the seal is seated properly without damage ¹.

Common Issues and Troubleshooting

Common problems with Rectangular Ring Seals can include leaks due to improper installation, damage from excessive pressure, or degradation over time. Troubleshooting these issues involves inspecting the seal for signs of wear or damage, checking the mating surfaces for cleanliness and proper alignment, and ensuring that the seal is correctly installed ².

Maintenance Tips

Regular maintenance of the 3686728 Rectangular Ring Seal is important for ensuring its longevity and optimal performance. This includes routine inspections for signs of wear or damage, cleaning the mating surfaces during maintenance intervals, and replacing the seal according to the manufacturer’s recommendations or when signs of degradation are observed ³.

Cummins: Manufacturer Overview

Cummins is a reputable manufacturer with a long history in the commercial truck industry. The company is known for its range of high-quality products designed to meet the demanding requirements of truck operations. Cummins’ reputation is built on a foundation of innovation, reliability, and customer satisfaction, making it a trusted name among fleet operators and maintenance professionals ³.

Cummins Rectangular Ring Seal Part 3686728 Compatibility

The Cummins Rectangular Ring Seal part number 3686728 is designed to ensure proper sealing and performance in various engine configurations. This part is compatible with a range of Cummins engines, including:

• ISG12 CM2880 G107
• ISX CM871
• ISX12 CM2350 X102
• ISX12 G CM2180 EJ
• ISX12/ISX11.9 CM2250
• ISX15 CM2250
• ISX15 CM2250 SN
• ISX15 CM2350 X101
• QSG12/X12 CM2350 G110
• QSK78 CM500
• QSM11 CM570
• QSX11.9 CM2250 ECF
• QSX15 CM2250 ECF
• QSX15 CM2350 X105
• QSZ13 CM2150 Z102
• X15 CM2350 X116B
• X15 CM2350 X123B
• X15 CM2450 X134B

This seal is engineered to fit seamlessly within these engine models, providing essential sealing properties that help maintain engine efficiency and longevity. Its design ensures a tight fit, preventing leaks and maintaining optimal pressure within the engine’s critical areas ³.

Role of Part 3686728 Rectangular Ring Seal in Engine Systems

The Rectangular Ring Seal, identified as part 3686728, is integral to maintaining the integrity and efficiency of various engine systems. Its application spans across several key components, ensuring optimal performance and longevity.

Lubricating Oil Filter

In the lubricating oil filter system, the Rectangular Ring Seal is employed to create a secure seal between the filter housing and the engine block. This seal is essential for preventing oil leaks and ensuring that the oil filtration process is effective, thereby maintaining the cleanliness of the engine oil and protecting internal components from wear and damage ³.

Oil Fill Arrangement

Within the oil fill arrangement, the Rectangular Ring Seal is utilized at the junction of the oil filler tube and the engine. This seal is vital for maintaining the pressure within the system, ensuring that the oil is properly directed into the engine without any spillage or loss of pressure, which could compromise the lubrication system’s efficiency ³.

Oil Filler Tube

The seal plays a significant role in the oil filler tube assembly, where it ensures a tight fit between the tube and the engine or the oil fill cap. This is important for preventing oil from escaping during the filling process and for maintaining the structural integrity of the tube under operational pressures ³.

Rocker Lever Top Level Assembly Front Cover

In the rocker lever top level assembly front cover, the Rectangular Ring Seal is used to secure the cover to the engine block. This application is important for maintaining the seal around the rocker levers, ensuring that no oil or contaminants can enter the assembly, which could lead to malfunction or increased wear on the components ³.

Rocker Lever Top Level Assembly Rear Cover

Similarly, in the rocker lever top level assembly rear cover, the seal is employed to ensure a tight fit and prevent any leakage or contamination. This is essential for the proper functioning of the rocker levers and the overall valve train system ³.

Valve Cover

The Rectangular Ring Seal is also crucial in the valve cover assembly, where it ensures a secure seal between the valve cover and the engine block. This prevents oil leaks and the ingress of dirt or moisture, which could affect the performance and longevity of the valve train components ³.

Conclusion

In summary, the Rectangular Ring Seal (part 3686728) is a key component in various engine systems, providing essential seals that contribute to the overall efficiency, reliability, and longevity of the engine. Its role in preventing leaks, maintaining pressure, and ensuring the integrity of critical engine components underscores its importance in the operation and maintenance of commercial trucks.