I looked this up via search engine and on this site and didn’t find much that was helpful. AGN threads that I read suggested loosening the manometer to degas the rifle. I didn’t want to do that. When I received my rifle from Airguns of Arizona it came with the degassing tool (maybe called a "fill port tool" elsewhere) seen in the first two photos. At the time I didn’t know what it was. I’m not sure if that’s the correct name for the part, but for instructional purposes that’s what I’ll refer to it as. The top of the tool has a head shaped like a ½” nut that a ½” socket fits nicely. The bottom portion has two short prongs used to set down into shallow divots on both sides of the fill port. Before you begin put on some safety glasses. I also positioned the fill port away from my face and body. The rifle was staged for these photos after I actually began to loosen the fill port.
To begin degassing your rifle, insert the tool into a 1/2” socket as seen in the third photo. Next fit the tool into the divots on the fill port .
1)
2)
3)
4)
5) Then very slowly loosen the fill port and incrementally turn the ratchet or driver counter clockwise until you begin to hear hissing from the fill port. Once it begins to hiss, STOP turning the fill port. I degassed mine from approx 210 bar this way and it took about 25 mins to get it to around 75-100 bar. That was sufficient for my needs.
Once you release the desired amount of air, then turn the socket wrench clockwise to re-tighten the fill port. Do NOT over tighten it. When you feel that the fill port takes more a little muscle to turn give it another ⅛ to ¼ of a turn to snug it up. Then replace the fill port cover. I hope this helps someone, because I was a little lost. I may have seen this covered in an AOA instructional video a while back. This should save you some time. If you don’t have the degassing tool I’m guessing that your next option would be to attempt the same process by loosening your manometer (pressure gauge).
To begin degassing your rifle, insert the tool into a 1/2” socket as seen in the third photo. Next fit the tool into the divots on the fill port .
1)
2)
3)
4)
5) Then very slowly loosen the fill port and incrementally turn the ratchet or driver counter clockwise until you begin to hear hissing from the fill port. Once it begins to hiss, STOP turning the fill port. I degassed mine from approx 210 bar this way and it took about 25 mins to get it to around 75-100 bar. That was sufficient for my needs.
Once you release the desired amount of air, then turn the socket wrench clockwise to re-tighten the fill port. Do NOT over tighten it. When you feel that the fill port takes more a little muscle to turn give it another ⅛ to ¼ of a turn to snug it up. Then replace the fill port cover. I hope this helps someone, because I was a little lost. I may have seen this covered in an AOA instructional video a while back. This should save you some time. If you don’t have the degassing tool I’m guessing that your next option would be to attempt the same process by loosening your manometer (pressure gauge).
