If you are brave enough to try replacing this yourself, be sure the oil is turned off or you may have a real oil mess to clean up, if you have 2 pipe oil lines and only one has a valve oil can come back through the other line, once the oil starts to flow there is no stopping it till you put it back together, the new strainer comes with a new gasket that needs to be replaced also.
I do not encourage you to do this yourself, life does not have an undo button.