my very old roter belt bit the dust bnot sure I got the corect one my part number is 244422a4 i went to case web site can not find that part number my machine is a1688 i beleive a 93 why I think it is the correct belt when I back the speed all the way off I can only get the messerument on the pully is down to 67.8mm instead of 66mm the other side is defebntily working the belt allmost looks like it is going to jump off it is so far out so the other pully is deffenitly working.... any ideas i can only get it up to 700 rpm on the fast so I wonder if my belt is too short? thanks for any help