1971-1973 Arctic Cat Snowmobiles Factory Service Manual, Page 128Get this manual
TRANSMISSION (SALSBURY 910) 8Inspect all threaded parts for stripped threads or otherwise damaged threadsReplace damaged componentsCheck the bearing and bearing retainer washerReplace if damaged or if condition is doubtfulPlace the complete roller arm and shaft assembly into proper position in the moveable face castingDrive Pulley Assembly (Salsbury 910)
1Insert roller arm shaft through the holes in the roller armPosition the retainer plate and locking tab over the roller shaft