FWIW, a small sealing surface is actually less likely to leak. It’s preferable so long as it isn’t so small that the poppet material begins to extrude.[/quoteAgreed
I just sent another email to DAR, I have sent several with NO reply's back period, so I'll see what happens for the last time.Why is it so hard to put up a diagram with the "O" ring sizes, ............... just about every other decent manufacture has them for their air guns,then if we want to dismiss the warranty (which doesn't appear to apply anyhow), we could at least get some use out of them. I have fired a total of 6 shots due to the leaking from numerous spots, fix that and another starts, all due to BAD "O" rings, since Dec 2020. I just don't trust AIM/DAR after the number of emails sent any more, I have the funds to get a full set 22 and 25 cal's, but will get the Sentry/Gauntlet in stead of the DAR now.Tia,Don
Contacted Joe, He said he would send me a good tube and a return label for my old tube. Well when I got home last night I figured since it has already degassed itself let's unscrew the poppet valve and clean it. Got it out, found the spring retaining nut recessed .200", (kind of weak at that setting) and unscrewed it. not much "microtrash" on the poppet, cleaned it and reassembled. Went in further with the retaining nut to .300" recess. It took air went outside and shot five pellets into Texas. 19 MPA at 2100 , checked at 0400 still 19 MPA. Sent an email this AM to hold off for now. Told Joe I would like to get a spare poppet valve and some good O-rings at some point as I do not trust the spares that came with the gun. Happier but not holding my breath. By the way, that poppet is kind of dinky and the sealing surface is mighty small.
What is this "recess" you are talking about?
Quote from: Firewalker on March 11, 2021, 10:45:37 PMWhat is this "recess" you are talking about?I understood it to mean the amount of valve spring preload against the poppet.
let's unscrew the poppet valve and clean it. Got it out, found the spring retaining nut recessed .200", (kind of weak at that setting) and unscrewed it. not much "microtrash" on the poppet, cleaned it and reassembled. Went in further with the retaining nut to .300" recess. It took air
Not the hammer spring. All the following appears to be dealing with the valve and poppet and getting it to hold air:Quotelet's unscrew the poppet valve and clean it. Got it out, found the spring retaining nut recessed .200", (kind of weak at that setting) and unscrewed it. not much "microtrash" on the poppet, cleaned it and reassembled. Went in further with the retaining nut to .300" recess. It took air
Got home last night and no loss of air between 0500 and 2200 still 190 BAR. Remounted my scope and shot ten in the garage from 10 yards average about 1" low , before all this started it was dead on at 20 yards. So scope on /off lots of on/off with air tube and barrel band and increased tension on the poppet stem. No time for anything else last night. I am off Sunday after thirteen 12's in a row ,will shoot at 20 yards and chrony. If I am in the 825 to 850 fps and grouping well I will leave it alone. Last time I messed with the hammer spring was two months ago and I think I accidentally used high strength Loctite on the plug threads tried turning it in last night to no avail, judicious use of a heat gun will cure it, I've made this mistake before on other projects and have not learned my lesson yet apparently.
Why is it so hard to put up a diagram with the "O" ring sizes, ............... just about every other decent manufacture has them for their air guns,then if we want to dismiss the warranty (which doesn't appear to apply anyhow), we could at least get some use out of them. I have fired a total of 6 shots due to the leaking from numerous spots, fix that and another starts, all due to BAD "O" rings, since Dec 2020.
I'm still working on going through the o rings and finding equivalence of them at McMaster or Granger. I can tell you that so far, I'm impressed with the o rings I have pulled. They may be cheap chi-com rings but they are duro70, no flashing, round, dont cut with the pick pulling them out, no cracks or signs of embrittlement. The poppet has been my Achilles from day 1 but it looks like I figured that one out and am happy with the result. Gonna shoot till I cant cast any more pellets today after work!
Quote from: Firewalker on March 12, 2021, 10:04:10 AMI'm still working on going through the o rings and finding equivalence of them at McMaster or Granger. I can tell you that so far, I'm impressed with the o rings I have pulled. They may be cheap chi-com rings but they are duro70, no flashing, round, dont cut with the pick pulling them out, no cracks or signs of embrittlement. The poppet has been my Achilles from day 1 but it looks like I figured that one out and am happy with the result. Gonna shoot till I cant cast any more pellets today after work!David do you think the poppet may be a root cause for all the leaks
You shooting indoors or you got a way to light the night?
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