Originally Posted by nickylsf
In my zeal to oil my recently acquired 301A, I put sewing machine oil in the motor tube, and then learned I should have used lubricant. I got some lubricant and tried to put that in, but it did not seem as though there was room to put any in. What should I do?
take the motor out and take it to a rebuild shop they will do a fine job servicing the motor. Then put it back. You just need to find a service manual - even the 401 manual will tell you how to do it. It is not very hard. To take it to a sewing machine shop will cost you a lot more. link to 401 manual - start at page 125 or so and scroll down - yanking the motor is the same procedure.
http://parts.singerco.com/IPsvcManuals/306W25.pdf