WH854 45 #1 Posted May 16, 2009 I got anew engine pully for my tractor today.the old one had a chunk outof it. Part #7466 normally there would be a set screw on the keyway,and one about 90 degrees.The new one has the set screws down at the bottem away from the keyway. The black marks are about where the set screws are located on the new one would this be a bad new pully or what.Went to the Toro dealer this morning(May 16) he told me ifyou have to buy a new engine pully for a Kohler engine with a Pto clutch you will get the new style pully,the key is no longer held in with a set screw.They are down at the bottom below the keyway.Thats in case you are interested chas. Share this post Link to post Share on other sites
W9JAB 156 #2 Posted May 19, 2009 :drool: The set screes are to keep the sheave (pulley) from walking on the shaft the key keep it locked in rotation. This should work just fine. :omg: Share this post Link to post Share on other sites
WH854 45 #3 Posted May 20, 2009 Thanke for the info 69ramrod69 I found out from the Toro Dealer that it might be an updated pully. chas. Share this post Link to post Share on other sites
Don1977 604 #4 Posted May 21, 2009 If it was mine, I would drill and tap it above the key. Just like every pulley I have seen that was made in the last 100 years. I think they screw up and did not want to fix them. I know the key is trapped in by the PTO, I just don't think every one else has been wrong. Share this post Link to post Share on other sites
Jim_M 179 #5 Posted May 21, 2009 If that key can move at all it will eventually round out the keyways in the pulley and the crankshaft. I can show you some that have done it. Share this post Link to post Share on other sites
WH854 45 #6 Posted May 22, 2009 Cain,t drill ahole on top of keyway ther is a threaded hole underneath for a bolt hole to fasten the clutch plate on to the pully. 69ramrod69 has the right idea.The Toro dealer told me if you buy a new one they will all come like the one I have.So I am using this one if it blows up, it blows up. Chas Share this post Link to post Share on other sites
WH854 45 #7 Posted May 24, 2009 Took my engine to Mulligans repair shop they are up near Slippery Rock Pa. getting the crank ground, oversize piston installed and what ever else it may need, then I will find out if my new drive pully will work or not. Chas :omg: Share this post Link to post Share on other sites
TT-(Moderator) 1,160 #8 Posted May 24, 2009 Any decent machine shops in your area, Chas? It shouldn't take more than Share this post Link to post Share on other sites
WH854 45 #9 Posted May 24, 2009 I was thinking about that TT! I haven,t decided yet thanks for the interest. Chas Share this post Link to post Share on other sites
zieg72 209 #10 Posted May 24, 2009 Interesting thread. I took the pulley off the my 16 hp Kohler from the C165 8 speed which is much smaller that the one that is for the 520H hydro. The C165 had the set screw over the key while the one from the 520H was staggered like you show. I hope I don't run into any problems. I am assuming the larger pulley is needed to run the hydro on the 520H to help with cooling??? I have to get a new belt anyway so I can put the smaller back on. I would then loose some ground speed but should be easier on the engine. What do you guys think? Share this post Link to post Share on other sites
WH854 45 #11 Posted May 24, 2009 I have a pully from a Model 1276,but it is smaller 3 1/2" inches across this one on the tractor(C- 105) measures 4" inches across.The transmisson is an 8 speed.Your 520-H is a later model if that pully came with it I would leave it on.The fellow at the Toro dealer said if you buy a new pully from Toro they may all come like my new one.Has anyone on here ever had PTO completely torn down? Chas. Share this post Link to post Share on other sites
WH854 45 #12 Posted May 26, 2009 This is a picture of the pully I have.There is one like it listed on ebay. Chas. Share this post Link to post Share on other sites