Outside Presser Foot Marking The Leather (Pfaff 335)

[Northmount]

That's really great news. Good luck

Tom

[thesergeant]

I was experiencing this same thing with my Pfaff 145-H4, which has the same presser foot tension assembly as yours. The pressure was extremely high and would "thump" the needle plate if I was sewing anything less than 4 layers of vinyl, multiple layers of leather, etc.

I wish I would have seen this thread earlier as I could have saved you a trip to the mechanic. You actually don't need to cut the spring, you can loosen the set screw that holds the black cylindrical piece in place that the screw threads into. You can grab it with some vise grips and slowly back the piece out. I pulled it out all the way, measured it and put it back in making sure it went deep enough to contact the set screw.