I have an ingersoll 4020. About a week ago I was mowing when the PTO stopped. It was in the low 90’s so, while frustrated I was happy to quit till I figured it out. After getting into the shade I raised the deck Expecting to find a branch caught up or something But did not. Blades all spun freely. So, it being hot I parked it. A couple days later I went into the garage and looked around. Couldnt see any loose wires or whatever… turned it on and it was working. Figured I’d get to it later. When I next mowed I had the same thing, hot day and 30 mins or so into mowing it stopped. Again nothing caught up. Again a few days later I tried and it was working. that day it was cool, and I mowed for an hour without issue. Any thoughts? Heat related sounds strange. I have had it for many years with many hot days mowing so…?