CombatMicah 0 #1 Posted April 25, 2020 Hi all, New to the forum and I couldn't find what I was looking for with a quick search so I'm posting my issue. I have a 417A with the original mower deck and I keep losing RPM on the blades when I even hit the smallest patch of thicker grass or sometimes for no reason at all. What I have done so far: 1) New Clutch plate 2) New belts on Mower deck, drive and deck drive 3) Hours of making adjustments to gaps, tensions and trial and error and always the same result. My question is how do I pin point what is slipping? Thanks in advance for the help. Share this post Link to post Share on other sites
pfrederi 17,742 #2 Posted April 25, 2020 Welcome. Put a piece of colored tape on the PTO bell. Blue) That will give you a visual reference to see if it slows down during the slipping period. If it does tighten the trunion on the end of the PTO engagement rod.(Yellow). 3 Share this post Link to post Share on other sites
Lee1977 6,677 #3 Posted April 25, 2020 (edited) The mule drive belt should be tightened to where you on can push down on the belt 1/2" between engine ans mule drive. There is a chance that the drive pulley in the deck is slipping. There is also a spring that tighten the belt on the deck if the slide on the deck is rusted the deck belt could be too loose. Edited April 25, 2020 by Lee1977 Share this post Link to post Share on other sites
8ntruck 7,025 #4 Posted April 25, 2020 The tensioneron the deck for the deck belt may not be doing it's job. It might Ned cleaning/lubrication. Good luck. Share this post Link to post Share on other sites
daveoman1966 3,752 #6 Posted April 26, 2020 At # 2, when you put a new belt on deck, did you see that the spring-loaded BELT TENSION ARM was free to float in the guides. It MUST be free to float or the Left / Right spindles will slip a lot. This is common. Be sure there is no debris or rust build-up under that flat IDLER bar. 1 Share this post Link to post Share on other sites
