The Singer 201 is a great machine. My son takes care of any mechanical problems with my machines -- he worked as a SM Mechanic for 14 years. I do have an Adjuster's Manual for the 201-2, but I would have to have an e-mail address, other than trying to send a pm with the manual -- that won't work. Also, you can download the operator's manual for the 201 from the Singer website, free.
EDIT: These vintage machines are very easily maintained by the user/owner!