GTA

All Springer/NP/PCP Air Gun Discussion General => PCP/CO2/HPA Air Gun Gates "The Darkside" => Topic started by: tennx on October 11, 2022, 04:18:02 PM

Title: Sentry .25 question
Post by: tennx on October 11, 2022, 04:18:02 PM
I went to shoot my sentry today and noticed a ever so slight puff of air coming out the back of the breech…not that familar with gun…I cover hole with thumb and fired a shot no puff….any ideas…

Many thanks
Title: Re: Sentry .25 question
Post by: Wayne52 on October 11, 2022, 04:20:01 PM
Sounds like a bad probe o ring to me ???
Title: Re: Sentry .25 question
Post by: tennx on October 11, 2022, 04:21:14 PM
Quote from: Wayne52 on October 11, 2022, 04:20:01 PM
Sounds like a bad probe o ring to me ???

Not arguing ….but oring looked good….the air seemed to come out of the very back of gun  ,not the chamber area…suppose I could do tissue test…
Pic added to original post
Thanks for reply
Title: Re: Sentry .25 question
Post by: tennx on October 11, 2022, 04:35:06 PM
I just did the tissue test…slight movement @ bolt…blew tissue off gun at the back…

Gun does not leak down


Could poppet be leaking into end of air chamber…with hammer strike
Title: Re: Sentry .25 question
Post by: tennx on October 11, 2022, 06:27:50 PM
Ok if no one can help original ?….can someone tell me best way to degas….I guess Im going in…lol
Title: Re: Sentry .25 question
Post by: Back_Roads on October 11, 2022, 08:57:05 PM
 Shoot it down, or unscrew the air gauge. I just shot mine, there is a slight puff og air back there, but not enough to blow a tissue away.
 I suspect a plastic piece that is over the valve stem, one would not have to degas to get to that part.
 I can see if I can dig up the EPV.
Title: Re: Sentry .25 question
Post by: OTmachine on October 12, 2022, 01:31:21 AM
Will this help
Title: Re: Sentry .25 question
Post by: Back_Roads on October 12, 2022, 08:48:37 AM
 Hard to see the part numbers, but I think it is #38, plastic piece with a Phillips screw, has been known to work its way loose, part is right behind the valve / valve stem.
Title: Re: Sentry .25 question
Post by: tennx on October 12, 2022, 09:09:47 AM
       Backroads and Otmachine many thanks
.while I might have your attention any source of parts besides FDAR…I know u folks like mr. Mike and no disrespect intended….but the only times he answers MY EMAILS is when Im spending money…lol
Title: Re: Sentry .25 question
Post by: Back_Roads on October 12, 2022, 09:13:08 AM
Quote from: tennx on October 12, 2022, 09:09:47 AM
   Thanks  guys..while I might have your attention any source of parts besides FDAR…I know u folks like mr. Mike and no disrespect intended….but the only times he answers MY EMAILS is when Im spending money…lol

 Wayne says call, between 9 am and 11 am CT, seems to work for him ;)
Title: Re: Sentry .25 question
Post by: tennx on October 12, 2022, 09:17:14 AM
Quote from: Back_Roads on October 12, 2022, 09:13:08 AM
Quote from: tennx on October 12, 2022, 09:09:47 AM
   Thanks  guys..while I might have your attention any source of parts besides FDAR…I know u folks like mr. Mike and no disrespect intended….but the only times he answers MY EMAILS is when Im spending money…lol

 Wayne says call, between 9 am and 11 am CT, seems to work for him ;)

Im thinking long term reason I asked about parts…from your description this maybe fixable in-house….at this time…gun has not been shot that much so may as u mentioned loose screw…to be honest I may just let it bump…but good to know these things…..many thanks
Title: Re: Sentry .25 question
Post by: tennx on October 13, 2022, 11:24:08 AM
Ok talk to Mike….he says check all the o-rings ,barrel,probe.tp…etc…he is the professional and didnt want to argue but I dont see how any air from those areas could get to back area of air tube….oh and he said no way the disc spacer between valve and hammer….he dont answer my emails….but nice guy to chat with…we agreed just shoot the dang thing…..lol