1971-1973 Arctic Cat Snowmobiles Factory Service Manual, Page 136Get this manual
TRANSMISSION (SALSBURY 780) 3Install the two (2) springs on the roller arm shaftNOTE: The longer end of each spring must be positioned adjacent to the holes in the roller armSecure all components in place with boltRetain bolt by bending corner of locking tab against the bolt headPerform stepson the remaining roller armPosition the roller arm spring ends behind the roller arm seats, using the spring tool (Arctic part number 0144-014)Perform this step on all roller arm springsPlace the complete roller arm and shaft assembly into proper position in the movable face casting