Two yahoo groups can help you with this machine. You will have to have a Yahoo ID to join these groups. Both have a lot of people who love and refurbish vintage Kenmore machines. There are manuals and other info posted in the files that you can download.
"oldkenmoresewingmachines" has the manual for the 117-552 in their files section
"vintagekenmoresew" has the parts list for the 117-552 in their files section