1971-1973 Arctic Cat Snowmobiles Factory Service Manual, Page 144Get this manual
TRANSMISSION (SALSBURY 770) 8Install the spider and pin assembly if it was serviced or if it was removed to service the fixed or movable facePull the movable face upward and install the spring ends behind the roller arm seats, using the spring tool (Arctic part number 0144014)Perform this step on all roller arm springs12Secure ramp plate in place with the three (3) ramp plate boltsTorque bolts from 10 ftIbs10
Install the ramp plate and secure in place with the snap ring
Retain ramp plate bolts by bending the locking tabs against the bolt head