mikeeyre74 289 #1 Posted April 29, 2019 I picked up a 416-8 late last year and I’ve only used it with a snowplow blade on it during the winter. I just put the mower deck on and the PTO keeps jumping out, turning itself off while I am mowing. I do not see anything obvious going on here, and it’s not my only wheel horse, I have had plenty of these in the past and have a few right now… I am mystified as to what is going on here? Share this post Link to post Share on other sites
JAinVA 4,620 #2 Posted April 29, 2019 (edited) Sounds like the actuating rod is out of adjustment.Have you tried turning the connecting trunnion to tighten up the linkage?Once engaged the whole system stays engaged because the linkage goes over center keeping pressure on until you pull the pto lever back. Edited April 29, 2019 by JAinVA 1 Share this post Link to post Share on other sites
JoeM 7,874 #3 Posted April 30, 2019 1 hour ago, JAinVA said: Sounds like the actuating rod is out of adjustment.Have you tried turning the connecting trunnion to tighten up the linkage?Once engaged the whole system stays engaged because the linkage goes over center keeping pressure on until you pull the pto lever back. Or someone has the take up in wrong side up, or vise a versa. I found and I can't remember if it works better when the take up rod adjustment is down though. Just a thought. Share this post Link to post Share on other sites
JAinVA 4,620 #4 Posted April 30, 2019 (edited) Rotate trunnion counterclockwise to increase PTO pressure.You will know by back pressure on PTO lever when engagement occurs. Edited April 30, 2019 by JAinVA Share this post Link to post Share on other sites
The Tuul Crib 7,337 #5 Posted April 30, 2019 Can you give us some pictures ? Help us out so we can diagnose the issue. We like pictures!! Share this post Link to post Share on other sites
mikeeyre74 289 #6 Posted April 30, 2019 It’s not much to look at but... After I wrote that message, I came into the garage and tightened it up one turn on the trunnion. I went back out for a few minutes, and it seemed to hold, but I’m not sure if that was the same amount of time then I was out there before it started disengaging on its own… I did try flipping engagement rod upside down, but it just wouldn’t work at all that way so I put it back on the top. I am familiar with how the mechanism works, sort of like a cam, where it gets tighter as you push the lever forward and then snaps into place as it goes over center. It just doesn’t feel like it’s going over center as much as it needs to, but I don’t see anything that is blocking its way to see it properly where it is? Share this post Link to post Share on other sites
Hacksawhero123 351 #7 Posted April 30, 2019 Pull the outer hub off and make sure that the spring (the one on the end of the shaft that pushes the hub from the clutch plate when disengaged) hasn’t gone to hell and is keeping the hub from getting full traction against the clutch plate. That happened on my C160. I just pulled the spring and outer bearing out and put it back together. Good luck. Mark Share this post Link to post Share on other sites
lynnmor 7,352 #8 Posted April 30, 2019 The hairpin usually goes on top, the parts list and owners manual shows it that way. I don't know if there was a change over the model years, but it does look like flipping it won't work. Share this post Link to post Share on other sites
Goldnboy 927 #9 Posted April 30, 2019 You may also want to check the engine drive pulley is not loose. It could be moving in towards the engine when pressure is applied when pto is engaged. I found this out when the po owned on my tractor cut the pto rod to shorten it so more pressure could be applied to compsate for the pulley moving Share this post Link to post Share on other sites
mikeeyre74 289 #10 Posted April 30, 2019 My manual shows the pin on the bottom for this machine? I’ll check those other things and see if that fixes the issue. Thanks for the ideas. Share this post Link to post Share on other sites
JimmyJam 542 #11 Posted April 30, 2019 Not seeing it from the pictures, there should be a spring on top of the PTO engagement rod to the top triangular pivot bracket. Share this post Link to post Share on other sites
The Tuul Crib 7,337 #12 Posted April 30, 2019 Nether my 414 or my 312 have a spring at that point. I think it is a simple adjustment on the connection rod. Share this post Link to post Share on other sites
Razorback 1,035 #13 Posted April 30, 2019 If you zoom in on this picture, you can see...... Share this post Link to post Share on other sites
JimmyJam 542 #14 Posted April 30, 2019 Sorry, zooming in from that far away is pretty fuzzy. There should be a hole in PTO engagement rod that the head of a cotter pin accepts a spring to PTO “flag”. This spring keeps things engaged or not. Share this post Link to post Share on other sites
Lee1977 6,773 #15 Posted April 30, 2019 Check to see if the c-clip on the short shaft in front of the bearing has come out of the groove. I enlarge your picture and it looks to me thar it's out. Share this post Link to post Share on other sites
Razorback 1,035 #16 Posted May 1, 2019 Try this pic.... Share this post Link to post Share on other sites
