3937373
Breather Housing
Cummins®

Introduction

The Cummins 3937373 Breather Housing is a specialized component designed for commercial trucks, contributing to engine efficiency and reliability. Understanding its function and maintenance is essential for preserving the engine’s health and performance.

Basic Concepts of Breather Housing

A breather housing is vital for an engine’s ventilation system, allowing air to enter and exit the engine crankcase to maintain balanced pressure. This balance is important for preventing oil leaks and mechanical issues, and it also filters out contaminants, protecting the engine’s internal components ¹.

Role of the 3937373 Breather Housing in Truck Operation

In commercial trucks, the 3937373 Breather Housing ensures smooth engine operation by interacting with various engine components. It is connected to the crankcase and works with the engine’s ventilation system to cool the engine and reduce harmful gas accumulation, which is vital for engine longevity and efficiency ².

Key Features

Constructed from durable materials, the 3937373 Breather Housing is designed to withstand harsh commercial trucking conditions. Its features include efficient air filtration and a secure connection to the engine’s ventilation system, contributing to the engine’s reliability and performance.

Benefits

Using the 3937373 Breather Housing in a truck’s engine system improves performance by ensuring optimal ventilation and pressure balance within the crankcase. Its robust construction and design elements enhance engine longevity and reliability, making it valuable for commercial truck operators ³.

Troubleshooting and Maintenance

Common issues with the 3937373 Breather Housing include blockages or leaks, which can affect engine performance. Regular inspection and maintenance, including checking for damage or wear and ensuring secure connections, are recommended to prevent more significant problems.

Compatible Engines

The 3937373 Breather Housing is compatible with several Cummins engine models, including:

• 6B5.9
• ISB CM550
• ISB CM850
• QSB5.9 44 CM550
• QSB5.9 CM850

Grouping by Engine Series

• 6B5.9 Series: Ensures optimal ventilation and pressure management.
• ISB Series: Maintains necessary airflow and pressure levels.
• QSB Series: Manages air and gas flow for smooth operation.

Role in Engine Systems

The 3937373 Breather Housing is integral to the ventilation system, working with the crankcase to manage ventilation and pressure equalization. It allows gases to escape from the crankcase, maintains optimal pressure levels, and prevents contaminant buildup. It also connects to the oil fill cap, ensuring clean air circulation, and is often part of a kit that includes oil catches to trap oil mist and particulates.

Conclusion

The 3937373 Breather Housing is a critical component in the engine’s ventilation system, ensuring a clean and pressurized environment within the engine. Its integration with the crankcase, breather, oil fill, cover, cam follower, and oil catch kits is essential for the efficient and reliable operation of the engine system.