New to the forum and I have googled, brought in a certified mechanic who replaced the PTO selenoid and also the tractor now has fresh hydraulic oil and filter. Screen was extremely clean. So I come here to ask you all. But my issue is when I'm disc mowing, the mower will get up to speed and work well for maybe 5 minutes, 30 minutes, 2 hours, or just 10 seconds before the PTO stops working and quits turning while the PTO switch is still engaged. The PTO will just stop working at random. After trying to get the field mowed today, what seemed to help keep the PTO and mower working properly was when I would notice the PTO was slowing down during operation, I would push the clutch in and the PTO and mower would speed back up to to working operation. Also, and this happened nearly every time, when I got into thick hay, the PTO would start to slow down like it was being turned off. I was mowing in B1. Any suggestions would be appreciated. Thanks.