If you don't have any grease fitting on the tube already, you can drill two holes for the fittings, but before you put the fitting in get some kind of penetrating oil and get some into the tube and let it sit for a while before you get out the hammer. Heat also helps persuade things to move. After you get it out, put the grease fittings in and use corrosion block grease to lube it up well, before you put it away for the winter.
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