Hi all,
Sorry in advance if this is too long a read, but I'm hoping for some advice...
I've been trying to fix a slow air leak in my Avenge-x .22 and not having much luck so far. I've replaced o-rings on the axle (they were brittle and flattened out) and replaced the dowty seal behind the fill pressure gage (and gently tightened that down). Although not as bad, there is still air escaping somewhere that I can't seem to locate with soapy water or silcone. Even though they look okay, I'll probably try replacing fill probe and air cylinder o-rings next before venturing deep into the receiver to replace 0-rings. For those interested, there are a couple of videos on YouTube by Shooter's den in Pakistan that give a very detailed and closeup view of how to completely tear down the Avenge-X. They're very helpful, especially if you use english translation closed captions!
Anyway, as I've been doing this, it occurred to me that I should probably build up a supply of spare o-rings for future repairs. I could buy a complete reseal kit for around $30-$40, or I could put together an order from a place like O-rings and More and get a lifetime supply at a fraction of the cost. I've ordered from them in the past. It's hard to beat a pack of 25 o-rings for pennies plus nominal shipping. I can also wait for Captain O-ring to start selling an Avenge-X reseal kit - an attractive option because Jon puts together a color coded sheet to go along with the color coded o-rings, making it so much easier to identify o-rings. But Jon tells me that kit is weeks away and I'm sure it'll also be in the $30+ range.
My question has to do with odd or non-standard 0-ring sizes and what to use if I can't get them. For example, nearly all the 0-rings needed for the Avenge-X are standard metric sizes (20 i.d. x 2 c.s., 4 x 1.5, 2.5 x 1.5, etc.) However, there are a few that aren't so standard. I'm referring to both the shematic drawing of the rifle from Pyramyd Air along with a parts list (partially in Chinese) that I found from Nova Vista. On that list, there are 0-rings such as 12.4 x 2.6, 2.4 x 1.8, 20.2 x 3.5, and one that's simply denoted as 10 (#69 on the schematic - any ideas what that is?). I can't find any 0-rings with these dimensions and I'm wondering if I can use the nearest standard size instead. So, for example, instead of 12.4 mm, use 12.5 mm; instead of 20.2 mm, use 20 mm; instead of 1.8 mm, use 2mm. What do you think?
Also, a few of the 0-rings listed do not specify the hardness (Buna 70 or 90). In cases like that, which do you go with?
Thank you for any help you can offer with this!
Mike
Sorry in advance if this is too long a read, but I'm hoping for some advice...
I've been trying to fix a slow air leak in my Avenge-x .22 and not having much luck so far. I've replaced o-rings on the axle (they were brittle and flattened out) and replaced the dowty seal behind the fill pressure gage (and gently tightened that down). Although not as bad, there is still air escaping somewhere that I can't seem to locate with soapy water or silcone. Even though they look okay, I'll probably try replacing fill probe and air cylinder o-rings next before venturing deep into the receiver to replace 0-rings. For those interested, there are a couple of videos on YouTube by Shooter's den in Pakistan that give a very detailed and closeup view of how to completely tear down the Avenge-X. They're very helpful, especially if you use english translation closed captions!
Anyway, as I've been doing this, it occurred to me that I should probably build up a supply of spare o-rings for future repairs. I could buy a complete reseal kit for around $30-$40, or I could put together an order from a place like O-rings and More and get a lifetime supply at a fraction of the cost. I've ordered from them in the past. It's hard to beat a pack of 25 o-rings for pennies plus nominal shipping. I can also wait for Captain O-ring to start selling an Avenge-X reseal kit - an attractive option because Jon puts together a color coded sheet to go along with the color coded o-rings, making it so much easier to identify o-rings. But Jon tells me that kit is weeks away and I'm sure it'll also be in the $30+ range.
My question has to do with odd or non-standard 0-ring sizes and what to use if I can't get them. For example, nearly all the 0-rings needed for the Avenge-X are standard metric sizes (20 i.d. x 2 c.s., 4 x 1.5, 2.5 x 1.5, etc.) However, there are a few that aren't so standard. I'm referring to both the shematic drawing of the rifle from Pyramyd Air along with a parts list (partially in Chinese) that I found from Nova Vista. On that list, there are 0-rings such as 12.4 x 2.6, 2.4 x 1.8, 20.2 x 3.5, and one that's simply denoted as 10 (#69 on the schematic - any ideas what that is?). I can't find any 0-rings with these dimensions and I'm wondering if I can use the nearest standard size instead. So, for example, instead of 12.4 mm, use 12.5 mm; instead of 20.2 mm, use 20 mm; instead of 1.8 mm, use 2mm. What do you think?
Also, a few of the 0-rings listed do not specify the hardness (Buna 70 or 90). In cases like that, which do you go with?
Thank you for any help you can offer with this!
Mike
