Singer 401A Rescue
I recently rescued a 401A from a trash pile. I have another slant needle and thought I could use parts off of it. When I got it home, I cleaned it up because it didn't look too bad. I used TriFlow oil and freed up the stuck selector knob and other parts. It was still a little hard to turn, so I removed the cam stack. Without the cam stack it was smooth. After cleaning and lubing the gear on the stack I put it back in following the procedure for timing it. Again it was hard to turn and there seems to be too much play in the height of the stack. I'm sure there is a way to adjust this. Any help would be appreciated.