1969 Ski-Doo Snowmobiles Service Manual, Page 21Get this manual
kind of puller you use, it may be necessary to use protection cap over the crankshaft threadSlide 11-12-13: Inserting the crankshaft into the crankcase, use the proper protection sleeves in order not to damage the oil sealsCheck for the proper axial clearance of the crankshaft, which has to be between .004 to .012" A.4 -