Originally Posted by
nige346
if you know someone local with a lathe these are easy to make, The Sam cylinders are very easy to dismantle, does it lose air when on the pistol, if so it is likely to be the o ring on the hex end of the cylinder, a very easy job. I dismantled mine using a soft jaw lath chuck to hold the cylinder (piece of leather around the cylinder so as not to mark it) with the lathe locked the hex fitting on the end will undo quite easily allowing o ring replacement. The valve end again is easy to dismantle and the valve itself very easy to strip, these were by far the easiest PCP cylinders iv'e worked on, If you have the Anschutz cylinder with a manometer it's a different story as the leak could be coming from the gauge itself, they are also not as easy to take apart. I made my own valve seal but for the life of me can't remember what the material was, I obtained it from a local engineering outlet, it was a nylon based derivative I believe, not sure if it was the same as the original material but it worked, that was nearly 3 years ago and it's still working as I know the current owner, If you do dismantle obviously ensure fully empty and also protect the hex fitting from damage when undoing, I used a block of nylon machined to be a tight fit on 2 of the flats then fitted a wrench to this rather than directly on the cylinder fitment, Without insult or offence, If your unsure leave it to someone who can do it as a damaged cylinder will be hard to replace and a full fill failure will be far worse, Mine was a K12 but I believe cylinders are the same.
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