My Brocock Bantam Sniper HR is leaking?

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bchannell

bchannell

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Nov 1, 2020
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Parkersburg, WV USA
It leaks about 40-50 bar a day. I put a balloon over the fill port, no air loss there. I soaped the dowty washers around the fill port, not air loss there.
What are the most likely places to look for now? I haven't taken it apart yet, as I'm waiting on my rebuild kit, but was just wondering about the likely leak places on these guns. I also had a question about removing the air block from the front of the action. What holds it on the action? How do you remove it?
 
bchannell said:
Would it hurt to degass it by loosening one of the manometer? It's leaked down 100bar.
Is the firing valve a likely leak spot?
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@bchannell
I don’t think it would hurt to do that if done incrementally, but check links in this thread as well.

Degassing a Brocock Sniper XR

Does anyone have a really good method for degassing a Brocock Sniper XR (or any of the Brocock line I guess). It looks like the only way is to remove the stock and then slowly unscrew the pressure gage of the bottle. Then I guess you would have to dry fire to get rid of the pressure between...
www.airgunnation.com www.airgunnation.com
 
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More questions...
Ok, the rifle was full 230 bar, and I let it leak down over a few days without touching it. When the tank pressure gets below regulator pressure, shouldn't the regulator still hold it's set pressure of 145bar? I'm thinking there's less pressure to hold back and it should hold the pressure, so It sounds like the firing valve or the orings on the air plenum block are leaking? Any thoughts? Am I on the wrong track? I'm just trying to do what I can till tomorrow when my proper tools will come to take it apart.
thanks
 
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bchannell said:
More questions...
Ok, the rifle was full 230 bar, and I let it leak down over a few days without touching it. When the tank pressure gets below regulator pressure, shouldn't the regulator still hold it's set pressure of 145bar? I'm thinking there's less pressure to hold back and it should hold the pressure, so It sounds like the firing valve or the orings on the air plenum block are leaking? Any thoughts? Am I on the wrong track? I'm just trying to do what I can till tomorrow when my proper tools will come to take it apart.
thanks
Click to expand...
@bchannell Once the tank (reservoir) pressure is lower than the regulator’s set pressure, the regulator pressure gauge will remain about the same as the reservoir’s pressure until the reservoir is filled and exceeds the regulator’s set pressure. There are a few threads in these guns on AGN. You may find it very helpful to take some time to read through them. This was the first thread I found and read on the Brocock Bantam Sniper HR https://www.airgunnation.com/threads/brocock-bantam-sniper-hr-information-thread.365686/
There are others. Check out the AGN search feature. Google works better for some in searching for info on this site.
 
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Ezana4CE said:
@bchannell Once the tank (reservoir) pressure is lower than the regulator’s set pressure, the regulator pressure gauge will remain about the same as the reservoir’s pressure until the reservoir is filled and exceeds the regulator’s set pressure. There are a few threads in these guns on AGN. You may find it very helpful to take some time to read through them. This was the first thread I found and read on the Brocock Bantam Sniper HR https://www.airgunnation.com/threads/brocock-bantam-sniper-hr-information-thread.365686/
There are others. Check out the AGN search feature. Google works better for some in searching for info on this site.
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You're ( I believe) talking about firing the gun down in air pressure. I'm talking about a leak on the tank side of the regulator. Should not the reg hold its pressure? I'll do some experimenting tomorrow and see
Thanks
 
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bchannell said:
You're ( I believe) talking about firing the gun down in air pressure. I'm talking about a leak on the tank side of the regulator. Should not the reg hold its pressure? I'll do some experimenting tomorrow and see
Thanks
Click to expand...

@bchannell That would be an incorrect assumption. Whether via firing or leaking, when the reservoir pressure drops I think the result is the same. At least this is my understanding. I’ve dealt with a faulty reg and a leak elsewhere in this gun. When I degass a gun both manometers register a decrease in pressure. So no I don’t think the reg would hold its pressure.

Consider asking before assuming. I think it would serve you well to read a bit more and maybe watch a video or two on how PCPs and regulators function.
 
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Ezana4CE said:
@bchannell That would be an incorrect assumption. Whether via firing or leaking, when the reservoir pressure drops I think the result is the same. At least this is my understanding. I’ve dealt with a faulty reg and a leak elsewhere in this gun. When I degass a gun both manometers register a decrease in pressure. So no I don’t think the reg would hold its pressure.

Consider asking before assuming. I think it would serve you well to read a bit more and maybe watch a video or two on how PCPs and regulators function.
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Wasn't " Should not the reg hold its pressure?" a question? The question mark is the clue.
 
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bchannell said:
Wasn't " Should not the reg hold its pressure?" a question? The question mark is the clue.
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@bchannell Context Is key. Since you seem to be acting pissy, from what I am interpreting to be a misunderstanding, I will explain what I mean. The assumption I’m referring to, your assumption, about what I said in regards to the regulator manometer’s reading dropping along with the reservoir’s manometer was incorrect. What I meant and what you assumed (believed) that I meant are not the same. You could have simply asked me what I meant by what I stated if I was unclear or mistaken. Re-read your assumption in bold below.
bchannell said:
You're ( I believe) talking about firing the gun down in air pressure. I'm talking about a leak on the tank side of the regulator. Should not the reg hold its pressure? I'll do some experimenting tomorrow and see
Thanks
Click to expand...
Consequently, I responded with “consider asking before assuming” since you were unsure of what I was communicating. What on earth does any subsequent question have to do with what I’m talking about in response to the above statements?

You seem to be concerned about air left in or potentially left in the plenum, yet you stated that you’re talking about a leak on the tank side of the regulator. My responses are in alignment with the questions that I am able to answer and have experience with in addition to responding to your assumption.

Your notions about the plenum pressure suggests possible concerns about something else. I haven’t had an issue with a leak on the plenum side of the regulator and I am not qualified to walk you through the details of gun’s functions, so I suggested reading and watching videos on those topics. Have you considered calling or emailing AOA and asking them why (in the video that you watched) they advise people to dry fire their guns after degassing? I have an idea or two as to why, but I’m sure someone there can explain elements of their presentation much more accurately than I. There are some really good folks at Airguns of Arizona. Ask for Shane. He’s top-rate. Also there are threads with good information in them on AGN. Have a look around and good luck in finding the source of your leak.
 
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