Originally Posted by OurWorkbench

As mentioned above a manual can be found at http://ismacs.net/singer_sewing_mach...ion-manual.pdf which has oiling points. Sometimes the old oil has hardened and may be stiff.

Some of the parts can be taken off and cleaned and polished. Generally, these machines don't need much in maintenance or service. Parts should be easy to obtain, even bobbin cases. Any low shank straight stitch foot will work. Some feel that the clones are as good or maybe even better than Singer original 15 machines. Some have had trouble with some of the newer 15 class bobbins working on original Singer 15 class machines, because the notch to fit on the bobbin winder isn't large enough. However, I haven't heard of that problem with the clones. I have a Sidewinder, so don't worry about not being able to wind a bobbin.