Harry,
There is a VingtageSingersGroup@YahooGroups. This is a very knowledgeable group with tons of insturctions in the files to help. The members are very helpful and will point you to information to help on the net. They also help with step by step instructions. It is members only and you do need to be approved, but it may be just exactly what you require.
You can go to the Singer's website and download a manual and also download parts/maintenace manuals. Good luck!