I just finished mowing (about 4 hours) pulled the tractor in front of the barn to let it cool off. A couple hours later I went to start and it would not crank. I will do my best to describe what I'm hearing. When I turn the key it makes a loud sharp scraping sound. The sound seems to be coming from the left went sitting in the drivers seat. Would the starter just stop working like that or might it be something else. Appreciate any help you can send my way it's a JD 2520.