I appreciate any information concerning my problem with my JD 2720. I purchased this tractor about a year ago and unfortunately I have had problems since. One of my problems is when I pull the PTO Switch Knob to engage the PTO, the Timer / Relay Unit, 10 amp fuse blows, at first I thought that I was not following the correct sequence, but I carefully followed the sequence per the manual and the fuse blows each time. i have never even used the PTO since I purchased it. I'm guessing there is a short in the electrical system somewhere. Again, I appreciate any help.