im trying to fix my troybilt chipper, heres the problem, i froze a bearing, i shut it down in time and all seems well with the shaft which is the main shaft of the chipper unit, now this chipper is not a stand alone chipper it is the unit which bolts onto the pto of the red power horse tiller, it does a good job for its size but, i cant find a proper listing for this machine. we got a new bearing by measuring the id and od of the old bearing, then pressing it into the bearing retainer which bolts onto the rear of the machine, the bearing wont go on the shaft, but it is real close and before i ruin the whole machine i need to know if this is supposed to be a press fit on the shaft or just a slip fit on the shaft does anybody know?