Unless the cylinder spins sluggishly from accumulated gunk and crud, or is so dry on the arbor that it squeaks, it is best left alone. If it isn't broke, don't fix it. This gun normally only needs field stripping for normal maintenance and not much of that.
There are probably numerous schematics out there on this. Disassembly is started by unscrewing the ejector rod. I put the rod into a leather shimmed vise and don't clamp down too hard or you will crush it. It is LH thread--so turn it right to loosen it. Do NOT do this without putting a couple of empty cases into the chambers to take the torque. Otherwise you may shear off the small pins that keep the extractor star located properly.
If you disassemble it I suggest you have a schematic handy, and lay the parts out in a line as you remove them. The cylinder is kept in position on the crane by two small balls at the forward part of the arbor. They are staked into position and normally stay put--but can come out.
If you lube it, be sparing. It doesn't need much and too much will cause it to gum up.
When reassembling put a drop or two of blue (medium strength) loctite on the threads and it will not come loose until you want it to. This general procedure applies, by the way, to other revolvers as well.
If in doubt read para.1 again.
