1982 Ski-Doo Shop Manual, Page 226Get this manual
SECTION 03 TRANSMISSION SUB-SECTION 07 (CHAINCASE)
REMOVAL
Remove the tool boxRemove pulley guard, drive belt and inspection coverRelease chain tensionRelease track tensionPry oil seal from chaincase (lower part) and drain oilDisconnect brake cable Pry out lower access plugRemove cotter pin and spacerRemove nut on hinge rod at chaincase bracketFrom the inner side of frame, remove the nut securing chaincase lower bracketRemove bracketRemove nuts, washers and "U" clamp holding the chaincase to the frameRemove chaincase shim(s) if applicable Move chaincase towards drive pulley to disengage hing rod Remove drive axleUsing two (2) large screwdrivers inserted between chaincase and frame, pry complete assembly from vehicle
Bearing cup
Oil retainer ring
Using an appropriate pusher, press oil seal into chaincase hubOil seal must sit flush with case hub edge Place lower sprocket with longer flange toward track side of chaincase(For proper sprocket and chain use, see Technical Data
INSTALLATION
Position assembled chaincase and driven pulley in locationInstall drive axle(Ensure that spacer has remained on axle) Install spacer and cotter pin to secure lower sprocket to axleInstall lower access plugInstall hinge rod, lower bracket, "U" clamp and previously removed aligning shim(s)Install oil seal into chaincase flangeA gap of approximately 1.6 mm (116") should exist between the end chaincase flange and oil seal