After many years of searching, I just bought a very used Di-Acro 12"
sheet metal shear. It needs a lot of restoration, but so far so good.
One problem is that the lid on one of the little spring loaded oil cups
has busted off, and I'm actually considering removing all 4 to clean it
up & repaint it. I can get replacement oil cups, but I'm wondering if
anyone has any neat tricks for popping them out of the castings. A few
thoughts I've had:
1) I could try running a tap down the tube of the oil cup, and then
pulling it out with a bolt.
2) I could try using a slightly bigger tap, in hopes of cutting far
enough into the tube that I can peel it out like a spring.
3) I could make a dedicated tool from a long bolt. It would be split
down the center so that it would compress, with a rim on the end to grap
onto the tube once it was pushed through. If I slip a piece of shim
stock into the slit before pulling, it wouldn't be able to recompress &
spring out. Sort of like a micro-sized internal gear puller.
I'm leaning towards option #2 becasue I'm concerned about chipping the
casting when I pull the oil cup out. I have no idea how tight these
things are, and I'm not sure how strong the castings will be in tension
around the hole.