I have a pedestal sink that has a weird leak issue. If water goes into the overflow it seems to leak out on the underside on the left where you put the bolt to attach it to the wall. Is this something where I could fix with some form of epoxy or before I take out my sink am I better off picking up a new sink basin. It definitely seems its leaking from the overflow piping from my testing. I've never seen what the sink basin that is facing the wall looks like so I am unsure if it's a fix or replace kind of thing.
You might want to check if there is a crack in the sink basin back there where it is leaking.
The good conscientious technician or serviceperson will carry extra oils and lubricants in case the new pump did not come with oil or the oil was accidentally spilled, so the service call can be completed without an extra visit.