1989 Ski-Doo Repair Manual, Page 299Get this manual
Section 03 TRANSMISSION Sub-section 04 (536 DRIVEN PULLEY)
Restrain Allen screov with the wrench and tighten nut with the socket using socket handle provided in tool box
4, Spring
Spring torsional pre-loadTo check spring pre-load adjustment, use spring scale hoole (PIN 529006500) and spring scaleInstall the hook on the sliding halfPreventing fixed half from turningpull sliding half with the spring scale perpendiculary with pulley axle(TYPlCAI
Always recheck torsional pre-foad after adJusting