Imperial 520 Sewing Machine Repair
I have a vintage Imperial 520 Sewing Machine whose mechanism is stiff, and wont run freely, to the point where only cranking by hand works - too much for the motor.
I have narrowed down the problem to the drive shaft that spins the bobbin holder 180 degrees - it’s quite stiff. I tried 3in1 motor machine oil, but that made it worse.
I’d like to take it apart and give it a good cleaning, but there is a cam attached to the shaft by some kind of pin (see image, center, a little out of focus)
So, my question is how do I get that pin out (or otherwise remove the shaft, and then how do I clean and properly lubricate that shaft?