Super Jet 61x cylinder sleeve removal - stuck 1/2 way

[96superjet]

Picked up an inexpensive set of 61x cylinders with less then great sleeves. Baked them in the oven at 450 for 20 minutes and expected them to drop right out with a slight tap, like it did on a minty set I did about 3 years ago. These crusty old girls took some pounding with a sturdy block of black walnut as my drift and a 3 pound sledge. I got them half way out, but ran out of sleeve material to hit with my wood drift block.

Any suggestions on how to get these the remaining way out?

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[yamabro]

We've had this happen a time or two because the outer sleeve had some rust or one or more of the ports had some scarring that grabbed the cylinder. (It's always best to address these issues before sleeve removal)
In your case when the sleeve has at least half of the exhaust port out of the upper portion of the cylinder the fix that has worked great for us is...
Opposite the exhaust port, grind out a portion of the sleeve to be able to put a piece of 1/4" X 1" X 5" (or so) flat stock steel. Slide the piece of steel through the exhaust port and the new hole you ground out. Spray some oil on it and put it in a press. It'll slide right out.
If you don't have a press, hit up a local shop. If you have all of the hard work done and all you need is a press they might do it for cheap if not free.
If you try to beat it out usually, almost always the sleeve will just break.

 

[96superjet]

UPDATE: success!!! Took two 4" planks of black walnut, glued them together and made use of a lathe. Got it really close to the 87mm diameter of the cast aluminum cylinder and figured I'd beat the iron sleeves out. Tried one hit with the sledge and my drift pressed right down in the sleeve.

So... I cut and ground a flat piece of aluminum stock I had laying around and it worked like a charm. I still had to hit it fairly hard with a three pound sledge, but the sleeves ultimately came out.

Now I need to clean up the inside of the cylinder walls a bit and then freeze and drop in the good set of sleeves I have.

I'm contemplating ordering a set of the home porting templates and give a shot at doing my own cylinder porting. Any thoughts on grinding the sleeves first before I put them back in the aluminum cylinder?


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