we have a 41 H that we recentlty tore down for a rebuild everything went back together fine and it ran fine when it went back together except the belt pulley now rubs on the sheild behind it rubs more in an up and down fashion more than an in and out we replaced the cam bearings the left 1 was really bad so we replaced them all except the ones in the pulley itself it seems fine but i didn't take it out im only checking for play in the pulley the bushing seems fine but i don't know what the measurements on it would be my local dealer doesn't have a service manual on it and we are going off a i&t manual not the greatest i have had other 2cyl JDs apart but this is our first H please help with any thoughts on what to check