1971-1973 Arctic Cat Snowmobiles Factory Service Manual, Page 148Get this manual
TRANSMISSION (ARCTIC DRIVE) 3Place the movable sheave on the hub of the stationary sheaveNOTE: The alignment detents in both the stationary and movable sheaves must line up4
If the roller arms were serviced, use the following procedure: A) Slide the pinned end of the roller arms into the roller arm mounting holeSlide roller arm weight on the capscrew and start the capscrew into the roller arm from the left sidePlace roller between the roller arms and push the capscrew completely through the roller and opposite roller armSlide the remaining roller arm weight on the capscrew and secure all components with the nutPerform steps A, B, and on the remaining arm