JeffryPMR 1 #1 Posted June 12, 2021 My 1987 520-H PTO handle disengages when I am mowing. A new belt didn't help. I have never had this issue before. The handle kicks back and shuts off the PTO. Any ideas? Thank you! 1 Share this post Link to post Share on other sites
gwest_ca-(File Mod) 10,488 #2 Posted June 12, 2021 Welcome to Red Square. The biggest cause of that is the pto clutch pressure is too low. Remove the trunnion at the end of the rod and tighten it about 2 turns for a start. When you apply the pto the handle should go over center and snap down with a bit of authority. The trick is to get it tight enough that the clutch does not slip under load which accelerates wear on the clutch lining. They sometimes emit a high pitched squeal when they slip. Time to tighten more. Garry 3 1 Share this post Link to post Share on other sites
Ed Kennell 35,629 #4 Posted June 12, 2021 to the Jeffry. Try Garrys suggestion and please report back. BTW, I believe the first 520s were made in 1988. Share this post Link to post Share on other sites
peter lena 8,038 #6 Posted June 14, 2021 @JeffryPMR, agree with gwest above, on the action / function of that lever , notice that the single pull spring on that , works 2 ways , pulled as you push forward , and pulled again as it goes down forward . check that all related linkage points are not rusty , but lubricated . that lever should have a forward downward pull that holds it in place . lubricate the trunnion on the thread rod , make small adjustments . should work easily , yet hold firmly in place . pete Share this post Link to post Share on other sites
