Ok this things got me stumped! I noticed my cleaning fan speed was way low last week goin over the old gal before getting started on beans. Got looking things over and found a wore out thrush bearing and it had chewed into the outer sheave up by the adjustment rod. Got all that replaced and can not get more than 450 rpm out of it before I'm out of threads on adjustment rod. Is there any chance someone could post some pics of theirs just for me to look see if I got it all back together correctly? I'm also questioning where the nuts on the adjustment rod are placed. Friend helped me take apart and can't remember where they were placed on the rod lol. Thank you to any one that could help!