Originally Posted by Adriel

Mark, thank you!

What concerns me is I don't know when the revised pumps came out. This pump has not been touched for over 10 years. Further, I have a new noise and odd vacuum behavior. I really don't want it ignore it and have a major disaster. However, I just wanted to prove I was wrong. You gave me a test, so will see if I can get results.

I will look later and see if I can find these bearings.