Originally Posted by featherw8love

One more consideration, is the belt tension. I do some local service for friends and one of my gal pals brought her machine to me asking why it was so slow...her belt had ZERO play. Vintage belts should only be tight enough to move the needle mechanism effectively, beyond that is a dangerous weight on the motor. Her brushes were full of carbon from the load on the machine. She sat down to a whole new experience after just a simple fix.