2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 98Get this manual
ENGINE Bearing Installation
NOTE: To ease bearing installation, warm the crankcase until hot to the touchPlace the bearings in freezer1Install the bearings so the numbers are visible2Drive or press new bearings into the crankcases, using the proper driverCAUTION: Press only on outer race of bearing to prevent bearing damage 70 mm (2.755") driver- for crankshaft main bearings 46 mm (1.810") for counter balancer bearings 28 mm (1.100") for pump shaft bearing
Crankshaft End Play Adjustment
1Make sure all bearings are firmly seated in both the Mag and PTO crankcase2Measure the distance from the PTO crankcase mating surface to the main bearing using dial caliper and straight edge