Avenger common issue - opinions needed from everyone

[Maizen]

Hello there. So I’ve owned 2 Avengers. One was a .25 cal and now a .177 cal. The rifles are completely fine on initial shooting. Problem is that on BOTH RIFLES…when I degas the rifle, wait a little to make sure it’s fully degassed, and reset the regulator…they end up springing a leak. It’s very annoying. Both rifles had leaks coming from the tubes. My .25 cal one had an issue with the smaller tube (o-ring in the rear went bad). This one has an issue with the rear bigger tube (seems like o-ring is bad near the rear).

Am I doing something wrong? I would like to know. Thanks in advance.

Correct me if I’m wrong, but the o-ring that needs replacing is number 2 right?

 

[rsfrid]

I degassed mine several times and never had a leak. Not sure what is going on here. Yes, try replacing that O ring.

 

[DNF]

I had this happen to mine, leaked in that spot and front of short tube BUT it would only leak down to about 2200.
When filling would go to about 2500 then stop filling and eventually leak down to 2200 and stay there.
I ended up putting a drop of silicone oil on the fill nipple, ran some air into it, set it aside for a week. Hooked it up to compressor and filled it to 4k like usual and it been fine since.
I am also now leary to degas again. Have done so many times in the past but it’s probably been a year since the last time until this last event.
Good luck!

 

[Trucker3573]

Mine never did that either but I have had other rifles do that. I don’t think it is unheard of. Probably due to the tolerances in the manufacturing of a cheaper gun not being the tightest. Just guessing at this but when the orings sit under pressure for awhile then get re pressurized they maybe are less likely to seal back up in a gun with a little lower precision in manufacturing.
De gassing always makes me nervous. All those orings that were pressurized have to re seal back where they were after all that pressure is relieved.

 

[nervoustrig]

Being unable to refill after evacuating a PCP is usually because an O-ring relaxed due to the absence of pressure that was previously holding it against the extrusion gap, combined with the elastomer having hardened due to aging.

Conversely, a gun which leaks down to some level and then holds pressure...that is usually due to the O-ring extruding into the gap and giving way at high pressure, but still capable of holding once the pressure falls to some lower level.

In either case, it's time to replace the O-ring. It was on the brink of failing and just needed a little nudge.

 

[Maizen]

Being unable to refill after evacuating a PCP is usually because an O-ring relaxed due to the absence of pressure that was previously holding it against the extrusion gap, combined with the elastomer having hardened due to aging.

Conversely, a gun which leaks down to some level and then holds pressure...that is usually due to the O-ring extruding into the gap and giving way at high pressure, but still capable of holding once the pressure falls to some lower level.

In either case, it's time to replace the O-ring. It was on the brink of failing and just needed a little nudge.

Ok I getcha. Makes sense. It is a year (maybe more) old budget PCP. Makes sense to replace it.

Edit: I fixed it! Thanks all!