Today I took apart the bobbin case area. The first steps were to remove the presser foot, needle, throat plate and slide plate. These were very straight forward as it only involved removing the thumbscrews and two throat plate screws. Here are the before and after pictures:
The Assembly Manual then says to remove the bobbin case which requires you to “Rotate the balance wheel until end of rotating hook bobbin case retaining ring is toward front of machine”. Well, I can’t do this since Ms. Rusty is so locked up (or rusty) that the gears won’t turn so I moved on to the next step – removing the feed dogs.
Then removed the rotating hook bobbin case position plate, which gave me pretty much free access to the whole rotating hook and bobbin case.
I then removed the rotating hook screw. This exposed the rotating hook position pin which is even more visible (not surprisingly) after lifting out the rotating hook, bobbin case and all. Isn’t all that crud underneath there just lovely?
Now that the bobbin case and rotating hook were out of the machine, it was relatively easy to unsnap the bobbin case from the rotating hook.
At this point it was a simple matter of cleaning the crud and grease off the parts with a bit of kerosene, followed by an over-night soak in Evapo-rust.
After kerosene and before Evapo-rust 
And after a overnight soak in ER:
Now that these parts are clean and shiny they will be ready to put back into Ms. Rusty when it is time for reassembly.
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