2003 Polaris Deep Snow Snowmobiles Service Manual, Page 109Get this manual
ENGINES
Crankcase InspectionBearing Fit
Any time crankshaft bearing failure occurs and the case is to be reused, Polaris recommends checking the bearing fit into the case halves using the following procedure1With case halves cleaned, press replacement bearing into each of the main bearing journals to determine basic amount of press fitNOTE: Do comparison check of all journals by manually forcing the bearing into the bearing seats noting if any are noticeably loose or tightNormal hand installation will be an indication of the recommended interference fitIf the bearing falls out of the case when the case is inverted, or if the crankcase bearing surface is severely galled or damaged, the case should be replaced