I have a 3820i with about 150 hours. Last fall I mowed everything and unhooked the cutter for the winter. Now I have hooked it back up and have 2 problems. I don't know if they are related or not. First the PTO no longer drives. With the speed lever in neutral the shaft turns freely. With the lever in either speed position the shaft is locked up. This happens with the PTO selection in either position. Second, now my 3 point pulses. It will lift and lower, but pulses up and down as if it is bleeding off and then lifts back to position. This happens no matter where I have the bleed off valve set. The manuals are limited and I cannot find the PTO solenoid. Any suggestions would be appreciated, my grass is getting high.