4089543
Rear Crank Seal Seal
Cummins®

The Cummins 4089543 Rear Crank Seal is a component designed for use in heavy-duty truck engines. Its purpose is to prevent oil leakage from the rear of the crankshaft, thereby maintaining the engine’s lubrication system integrity and ensuring efficient operation ¹.

Basic Concepts of Rear Crank Seals

A rear crank seal is a device installed at the rear of an engine’s crankshaft. Its function is to create a barrier that prevents engine oil from leaking out while allowing the crankshaft to rotate freely. This seal plays a role in maintaining engine integrity by ensuring that the lubrication system remains effective and that oil does not escape into other engine compartments or the environment ².

Purpose of the Cummins 4089543 Rear Crank Seal

The Cummins 4089543 Rear Crank Seal serves to maintain the engine’s lubrication system by preventing oil leaks from the rear of the crankshaft. This seal ensures that the oil remains within the engine, providing necessary lubrication to moving parts, which helps in reducing friction and wear. By keeping the oil contained, it also helps in maintaining the engine’s efficiency and performance ³.

Key Features

The Cummins 4089543 Rear Crank Seal is constructed from materials that offer durability and resistance to oil and heat. Its design includes features that enhance its ability to form a tight seal around the crankshaft, ensuring effective oil retention. The seal’s material composition and design contribute to its performance and longevity in demanding engine environments.

Benefits

Using the Cummins 4089543 Rear Crank Seal can lead to improved engine efficiency due to effective oil containment and lubrication. It may also result in reduced maintenance costs, as a properly functioning seal minimizes the risk of oil leaks and associated engine damage. Additionally, the seal contributes to enhanced engine reliability by ensuring that the lubrication system operates as intended.

Installation Process

Installing the Cummins 4089543 Rear Crank Seal requires careful attention to ensure a secure fit. The process involves cleaning the crankshaft and seal seating area, lubricating the seal lip, and pressing the seal into place using appropriate tools. It is important to follow manufacturer guidelines to avoid damage to the seal or crankshaft during installation.

Troubleshooting Common Issues

Common problems with rear crank seals include oil leaks and seal failure. These issues can often be traced to improper installation, wear and tear, or contamination. Troubleshooting steps may involve inspecting the seal for damage, checking the crankshaft for irregularities, and ensuring that the seal seating area is clean and free of debris.

Maintenance Tips

To ensure the optimal performance and longevity of the Cummins 4089543 Rear Crank Seal, regular inspections are recommended. This includes checking for signs of oil leaks and verifying that the seal is intact and properly seated. Adhering to recommended maintenance intervals and procedures can help in preventing issues and ensuring the seal continues to function effectively.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and quality, Cummins has established a reputation for reliability and performance in the automotive industry. The 4089543 Rear Crank Seal is part of Cummins’ commitment to providing high-quality components that meet the demands of heavy-duty applications.

Kit Components of 4089543 Rear Crank Seal by Cummins

Captive Washer Cap Screw (3821783)

The captive washer cap screw is a component in the 4089543 Rear Crank Seal kit. This screw is designed to securely fasten various parts within the assembly, ensuring that components remain in place under operational stress. The captive washer integrated into the screw design prevents loss during assembly and disassembly, enhancing the reliability and ease of maintenance of the seal system.

Oil Seal (4004652)

The oil seal, identified by the part number 4004652, plays a role in the Rear Crank Seal kit. This component is responsible for preventing oil leakage from the crankcase, maintaining the integrity of the lubrication system. The oil seal is typically made from durable materials to withstand high temperatures and pressures, ensuring long-lasting performance and protection of internal engine components from contamination.

Carrier Gasket (4022497)

The carrier gasket, part number 4022497, is an element in the 4089543 kit. This gasket provides a sealing surface between the rear crank seal and the engine block, preventing oil from escaping and contaminants from entering. The gasket is designed to withstand the thermal and mechanical stresses encountered in engine operation, ensuring a reliable seal over the life of the component.

Conclusion

The Cummins 4089543 Rear Crank Seal is a vital component in maintaining the integrity of heavy-duty truck engines by preventing oil leakage from the rear of the crankshaft. Its design and material composition ensure durability and effective oil retention, contributing to engine efficiency and reliability. Regular maintenance and proper installation are key to maximizing the performance and longevity of this Cummins part.