I have an 18,000 gallon in ground pool. About a year ago I noticed we were running into problems with the motor shutting off from thermal overload. While running any water that falls onto the metal turns to steam so its pretty hot. Around the same time I noticed sometimes when it was cold out (32F) the pump would make a squealing sound when first turned on. If you shut it off for a second and turned it back on then it would disappear. Long story short today I was feeling around under the pump and I didn't notice any real air flow coming from the internal fan so I decided to open it up and see if the fan had broken. When I got the pump plates off this is what I found the face of the motor looks like. Should I just call it quits and replace the motor or is this normal wear?