Was mowing silage with a Kuhn FC300 moco 2 days strait. Half way through the second day the pto kicked out, light was still on. Stopped pto restarted ok, but slipped as soon as I started mowing. Stopped and started pto about 10 times, slipping every time and then it just locked up and I mowed the rest of the day and night no problems (except clutch pedal spring broke, but that's minor) Any ideas as to what caused this?