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crwdns2936043:0crwdne2936043:0 crwdns2933505:0crwdne2933505:0 Nicolas Siemsen

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+[* black] With the gauge removed from the body you can now carefully use a flat blade screw driver, or a small hook, to remove the black o-ring from the brass stem on the gauge.
+[* black] Match the size of this o-ring with one from your kit. Likely, the new o-ring will have a slightly thicker "section" or thickness but should have the same inner diameter. The best one I found was a 2mm section, 4.4mm inner diamater o-ring.
+[* black] Rub a small amount of synthetic, preferably silicone based grease on the o-ring.
+[* black] Set aside the gauge until reassembly.

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