What is the auxiliary oil pump mainly used for?

The auxiliary oil pump is primarily utilized during the startup phase of an engine or machinery. Its main purpose is to ensure that oil reaches all the vital components of the system quickly, which is crucial for lubrication and to prevent damage during the initial moments when the engine is poised to operate. Starting an engine without adequate lubrication can lead to excessive wear and tear on moving parts, resulting in failure or reduced longevity.

While auxiliary oil pumps may have roles in regulating pressures or assisting in cooling during operation, their predominant function is to provide immediate oil circulation upon startup. This ensures that the engine is properly lubricated before it reaches normal operating conditions, contributing significantly to the overall health and reliability of the machinery.