Tuning EVOL Foster fitting sticking open when bleeding

[Dairyboy]

Well little issue with the EVOL. Not sure what caused this as I've filled it like 15 times so far and last 5 times the foster is getting stuck open. Need a pliers to quickly do the bleed screw and not drain the tube on the gun. Based upon this photo looks like the part that could be the culprit is the little oring? #1. Could just try adding silicone oil to it I guess. Doesn't leak at all once I get it bled. Annoying thing is if it is that oring, it's the only one oring store didn't have in stock when I ordered all the orings for the gun.

 

[Elbowgrease]

I had the same thing happen to my EvoL hps the first time I filled it up. It was filled at AoA when I purchased it new. Got it home, shot it, went an aired it up and the exact same thing happened. I took it back and AoA went through the whole airgun. Its been fine ever since. But yeah, Same issue. The only reason I took it back to AoA is because im just down the road from them. If not I would of taken that part off and checked it out. I should of asked what the issue was but was happy just to get it fixed. EvoLs have few o-rings and whatnot. Im sure its a simple fix. It happens. And it sucks when you spend that much on an airgun only to run into an issue. Hell. My Edgun Lelya eats valves like crazy.

 

[Mr.H]

Wow, sorry to hear this. Maybe a call to AoA would be in order.

 

[Dairyboy]

Oh yeah it's not a big deal to me really. Gun still holds air just fine just upon the bleeding. I contacted Tom and he said that the oring should be the issue. It's funny as I bought all the orings for the gun just something I've been doing the last few guns and the only one out of stock was that size at the oring store. But yeah you never know when an oring can go just happens. 

 

[MMCM13]

I read that putting a drop of silicone (pcp safe) oil in the fitting prior to filling, can prevent this. I have had that trouble on the foster on two Marauders, I used the oil trick on the replacements, no problem since. I understand that the oil prevents moisture from doing its evil deed on the metal of the fittings.

 

[Dairyboy]

I asked Tom that and he said I could try but didn't believe it would change it. He mentioned using Polyurethane orings so I looked and found those on Oring store. Got some on the way.

 

[Gerry52]

Are you opening your bleed screw QUICKLY? One of the 1st "rules" I learned about airguns was fill SLOWLY, bleed QUICKLY. If opened slowly you might not get enough initial pressure to close that one way valve. Do you know the size of that o-ring? I might have 1 or 2 for you. PM me with size & if I have it I'll send it to you. 

 

[Dairyboy]

I appreciate it Gerry! But I have them on there way. Nice thing is the oring store is in WA so most orders from there is like a day or 2 max. And yes I am bleeding it fast. Can't bleed it fast enough to shut on my own so need to use the pliers. Usually works just fine. I did actually add 2 drops of 10wt silicone oil into the foster fill and did help it work as it should again. Will likely replace the oring though once I get it.

 

[Dairyboy]

Orings in hand today already from the oring store. So I at least have the when I need them.