300zx 7 #1 Posted May 14, 2011 My son has a 312-8. I was mowing some of his yard yesterday and occasionally the PTO would disengage. What causes this? Share this post Link to post Share on other sites
JC 1965 1,532 #2 Posted May 14, 2011 :WRS: Is the PTO handle stay in the engaged position? If not check to see if the spring has broken or come loose. I had that happen once, the spring had broken and wouldn't hold pressure on the handle. Hope this helps!! :hide: Share this post Link to post Share on other sites
300zx 7 #3 Posted May 14, 2011 Thanks, I will check the spring. Share this post Link to post Share on other sites
rick 255 #4 Posted May 14, 2011 I had trouble with the PTO on my 416H staying engaged, I turned the clevis on the adjustment end of the actuating rod the opposite way, turned the adjustment block down. It works well now. Share this post Link to post Share on other sites
sorekiwi 761 #5 Posted May 14, 2011 Check that the trunnion is not binding up when the PTO is in the engaged position. I had shimmed the trunnion on my 520H with some washers to take out some of the slop when in the disengaged position, but it made it so the linkage did not go all the way "over-centre" when engaged. Seemed that every time it jumped out of engagement, the PTO lever would smack me in the knee as well :hide: Share this post Link to post Share on other sites
Duff 206 #6 Posted May 14, 2011 Pete and Rick are both on the right track. The spring actually holds tension against the PTO brake when the PTO is disengaged. I don't think it has any real effect on it when it is engaged. On my 312-8 I had to adjust the trunnion a couple of times until I got just enough tension to hold it engaged without putting too much pressure on the system. Oncef I got it set it's been fine ever since. ~Duff :hide: Share this post Link to post Share on other sites
