Below is a previous post I made on my experiences with the PTO on my 3400. Hope it helps some. I have used a tiller on mine on some very hard ground with no issues. I believe the PTO failure posted about on this site was a result of an improperly adjusted cable based on the pictures posted of the cams. If anyone has a shop manual for a 2800 or 3400, please check to see if there is a PTO cable adjustment procedure. Thanks.
Terry
I will share my experience with the PTO not shutting off with everyone. I saw the cable on mine kinking and lubed it with one of the motorcycle cable lubers, which by the way works very well on the cable. Just had to loosen the seat belt mount and swivel it out of the way, engage the PTO lever to allow enough room on the cable to install the luber, pull the rubber boot back, and spray the lube in. Forces the lube through the cable in about a second. However, the cable was not the problem. The PTO still would not shut off. I disconnected the cable at the transmission and operated the cable and it moved with no resistance. I then manually operated the lever on the side of the transmission without the cable installed and noticed that it was slow to return to its disengaged position. I don't know if the spring on it is weak or if there is some internal resistance on it, but it just gradually returned to the disengaged position. So what was happening when I disengaged the PTO with the cable was the cable was trying to push the lever at the transmission which was causing it to kink up top. When that happened, the lever at the bottom could not pull the cable. Now when I disengage the PTO instead of forcing the lever up top to the off position, I move it slowly and give the lever at the transmission time to pull the cable. I hope this made sense.
Terry