it’s the regulator of my Air Arms FTP900. The original lube is some kind of black grease. Have heard that dry moly lube powder is the best although I have no idea how to apply it. Can you share your experience ?
Air Arms What type of lube is good for regulator spring washers?
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I've used dry lube on it indeed. Just some moderate spraying over the washers. Not too much, you don't want a sticky mess over there.
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The washer stack of regulators are vented to the atmosphere, so really you could lube with anything. Having said that, I find most lubes are used way to heavily and can interfere with function. A very light smear of some kind of grease is fine, so small a smear you can't see it. Honestly, I run all mine dry, and haven't noticed any problems. I will admit to having some silicone lube on my fingers when rebuilding and installing regs, so they might get some minor amount of that, so maybe it's good. I know silicone is not for metal to metal, but a lot of tuners use it on reg stacks.
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Damn near any grease ( PTFE best ) used very sparingly ... Except silicone, keep that for the 0-rings only !!
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I bought a can of "Corrosion X" lube, I think it was recommended at one point by Scott. Seems to work fine but I think it's best not to just spray it on the assembled stack as I have done a time or two. It needs to be a light film, in other words. I also find this area to be the trickiest to lube correctly. I also found out the hard way that not putting any silicone grease on the sides of the chamber to help the O-rings slide smoothly as the regulator opens and closes isn't good. On the other side of things the regulator of my Caiman had the spring stack encased in silicone grease when I got it. That didn't work well either. Light silicone grease on the O-rings and the inside of the chamber the washers are in and a little lube/corrosion guard for the washers has worked for me well so far.
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