Recently used my tiller. Pro engaged and disengaged in garage. Tilled about 2 acres. Leaving field raised tiller stepped on clutch to stop PTO. Tried to push PTO lever forward to disengage PTO, will not budge. Tuned off tractor took tiller shaft off PTO as I didn't want tiller rotating. 3 POINT works fine pto shaft turns, PTO lever will not move forward to disengage