T1Looks pretty normal for an old saw to me. Spray with a little cleaner, then brush and rinse. Then blow off.
Don’t try removing pump completely. If you have to pull it, pull off crank and flip to the side. The oil lines in those are tricky and you don’t want to play with it. As long as oil line is intact, and not torn, you should be good.
Its usually the fly side seal.