I have a 52" Chariot Jr that has had issues lately. In the past I have replaced the electronic clutch and all was good. Recently, the center blade seems to be laying down the grass and leaving a strip that is not fully cut. The pulley is red hot to the touch, so it is obvious that the belt is slipping. I replaced the spindles, belt, pulleys, blades, and spring... no change. I have tried looser belt tension and tighter belt tension... no change. What am I missing here? I checked belt routing and that is all good, and yes, the blades are on the correct way. What is the deal? Any thoughts?