When is it appropriate to change a strainer in an oil system?

Changing a strainer in an oil system is primarily necessary when the delta pressure (delta-p) is too high. Delta-p is the difference in pressure across the strainer, and it serves as an indicator of how much debris or particulate matter has accumulated within the strainer. When the delta-p increases beyond a specified limit, it signifies that the strainer is becoming clogged, which can restrict oil flow through the system. This restriction may lead to increased wear and tear on machinery, overheating, and ultimately, system failure.

Monitoring delta-p helps ensure optimal operation and extends the life of both the strainer and the entire oil system. Timely replacement based on delta-p readings is a proactive maintenance strategy that enhances reliability and efficiency.

In contrast, changing the strainer when the oil temperature is too low does not directly relate to the condition of the strainer or its effectiveness. Changing it immediately after installation typically isn't necessary unless it has been contaminated during the installation process. Scheduled maintenance may involve a variety of tasks, but not all maintenance tasks should be time-based; they should also be condition-based, like delta-p checks for the strainer.