1971-1973 Arctic Cat Snowmobiles Factory Service Manual, Page 154Get this manual
TRANSMISSION (ARCTIC DRIVEN) 34Check for broken or distorted springIf spring condition is doubtful, replace with new springIf the condition of any component is doubtful, it should always be replacedPlace the spring over the fixed face hub and hook the end of the spring in against the casting knurlPosition the torque bracket over the top of the springDriven Pulley Assembly (Arctic)
1Insure all components are clean and defective parts either repaired or replacedPlace the shoe ramps into POSition on the torque bracketTap into place, using rubber mallet7