Hello all, long time lurker here. I have a cub 106 42 inch mowing deck that I have been working on for a year or so. When I bought it the previous owner said the mower deck would slip the mule drive belt and he thought it was because the pulleys were rusted up on the deck and mule drive. I have wire brushed the deck pulley, replaced both mule drive pulleys. I installed a cub belt part number 490489-R2 through the faq section here. I installed the belt this afternoon and found it was tight going on but I got it slipped on. As soon as I engaged the pto the belt slips off the spring tensioned pulley/ right side pulley of the mule drive. Now the only problem I can see is that my pulley bracket has worn on its pivit shaft to much and allowing the pulley to be canted enough to throw the belt. I do have both pulleys at the correct 90 degrees from the pto even tho the belt is hard to get in when fully unadjusted. Do I have to much tension?? Any help would be appreciated and I hope this makes since. Thanks for your help.