I have found if your vintage machine is loud then it needs to be oiled and greased. That also goes for the newer sewing machines. Most sewing machines need to be oiled, needle changed and clean out the lint every 8 hours or when you start to hear the sewing machine getting louder, the needle making a poping sound or just depending on projects you are working on. Vintage machines require being oiled for sure around 8 hours of use due to them being all metal inside. Where as the newer one have more plastic part inside. Make sure you are using sewing machine oil and grease. All machines need an over haul once a year, if you can't do it yourself take it in to be done. Check the vintage post on this forum for information on how. It's really not hard to do and it takes only a few minutes to get them back to there quiet running. My vintage are quiet until they need to be reoiled as are my newer one too.