I posted a message several months ago that 560 was plugging hydraulic filters after short use.I had changed oil several times and I don't remember how many filters. Rusted and others gave good advice on getting housing cleaned out. I pulled PTO unit so I could get rear housing opened up. Got lots of brown crud out of it, a bunch below level of rear plug. I used some carb cleaner on spots inside and a wire brush, washed stuff out with Kerosene sprayer. I especially made sure housing under pick up tube was clean. I checked TA housing and area where belt pulley would be, looked clean but you can't see much around the stuff. Also cleaned in filter housing though I had done that before when changing them. Put it back together and just finished second cutting hay with no plugged filters. I use the 560 for most of the haying jobs so really glad to not have to stop every 2-4 hours to clean filter. Thanks for all the suggestions.