I have a question about my Troy Built Horse. I have never paid attention before but the drive pulley that turns the transmission and tines is loose. I can grab it and it moves on the shaft maybe 1/4". I'm not sure if this is normal or not, the tiller works. I have removed the engine and was going to remove the cast iron cover to get access to the drive pulley but cant get the cover off so I cant see how the pulley attaches. Does anyone have a Horse tiller to see if there is some play in the drive pulley? This is NOT the pulley that attaches to the engine but the belt turns this lower one. I would be curious if there is a way to tighten it, without getting that cover off I can barely see the shaft that it slides on. I would appreciate any advise, thanks!!