1971-1973 Arctic Cat Snowmobiles Factory Service Manual, Page 141Get this manual
TRANSMISSION (SALSBURY 770) 4Pull the ramp plate off the shaft of the fixed faceNOTE: If difficulty is encountered in removing the ramp plate, heat the ramp plate area around the center hubUsing two (2) screwdrivers positioned on either side of the ramp plate, pry the ramp plate off the shaftBend the corner of the lock plates away from the three (3) roller arm retaining bolts
85Release the spring tension on all roller armsNOTE: When spring tension is released, the movable face will drop toward the fixed face