Just a followup on the original PTO situation. I got it installed and fired up the tractor and the mower started right up. This is BEFORE pulling up on the PTO knob. Long story short, I fought it for a couple of weeks, trying everything and finally removed the rear PTO kit, the rear hydraulic kit I also bought for it, and put the stock cover back on, with a brand new PTO solenoid and it did the same thing! I then went and bought a new PTO switch and installed that and it didn't change anything so was about to load it onto a trailer and take it to the Deere doctor, when my brother (who's a great mechanic) showed up and convinced me to pull out the PTO solenoid and the guts below it so he could look at everything and found a diagram that showed it going in the reverse direction. We inserted the thing in the reverse direction and voila! It works like brand new again! The installation instructions that came with the 540 Rear PTO picture does show it correctly, but it's so blurry in the printed version I had that I saw it wrong, and the parts exploded view that I found elsewhere showed it in reverse! Beware of those things!