I have a compact MF 1225 hydrostatic. The PTO stopped working and after trouble shooting, I found that the PTO control valve solenoid was bad. I replaced it and the toggle switch that energizes it. Now the PTO works for a short time (5 to 10 minutes) then cuts off. After the tractor sits awhile, the PTO will start up again. Does any one have any ideas on where to go from here? This tractor is the same as the ISEKI model TM233. The hydraulic oil level is good.