I have a 2018 bx23s with 300 hours. While using my machine today with a rear mount wood chipper and brush mower the rear pto just stopped spinning. No loud noise no banging. machine still runs and the rear lift still works. When I select either rear middle or both and then turn on pto nothing happens. the role pin is still in. I here that it can possible be a small piece of silicone and got lodged in the valve.