I have a Jubilee tractor I use to bush hog the fields. The problem I have is that everytime I mow, I twist off the PTO adaptor. I have it raised so it mows about 8-10 inches off the ground but it never fails, it will catch on either dirt or brush and will twist the brass adaptor so all the splines break. The other problem I've had is that the coupling that attaches to the pto adaptor has been pushed forward and the splines on the adaptor are pushed forward like gathering of material. I am not sure but I think this is happening when I raise the bush hog to the high positon when heading back to the house. What am I doing wrong? It is a Woods bush hog I bought used and I replaced a bolt I thought might have been the shear pin with a soft bolt but that didn't help. Any ideas? I can't keep buying 3 -$12 adaptors each time I mow like I've been doing for the past two years.