1972 Ski-Doo Shop Manual, Page 56Get this manual
DRIVEN PULLEY 3Using an appropriate pusher, press down on outer cam until hole in cam mates with third ho le in shaftI nstall larger roll pin then small roll pin to lock outer cam in position
INSTALLATION (All models except Nordic 640ER and Alpine and Valmont)
4Position new bushing in hole of sliding pul ley halfUsing bushing pusher, press down until bushing is flush with edge of pulley (fig1-9-18)
1On Elan and Olympique models, position the bearing cone in the bearing cup
5Place spring and sliding pulley half over shaftInsert spring hook into hole of outer camAlign hole in sliding pulley half with the other end of springTurn sliding pulley half counter-clockwi se to obtain Ibs(when facing outer cam) and hold in position (fig1-9-21)
2With drive chain tension released, hold upper sprocket with chain in position and insert assem bled driven pulley shaft through chain case and sprocket (fig1-9-23)3Instill spring washer and castell8ted nut
6Holding sliding pulley half in position, align