Help please with valve leaking
hi guys
I have searched the site and can’t find the valve the same as mine. That’s why I’m posting this here. I seem to have a early model tank with no brass inserts and air is leaking out the top hat or valve stem. Could even be both. Also the valve stem is extremely loose and can be easily pulled out or by locking the breech and firing or decocking pulls it out. Have taken the valve of the bottle and can’t see anything wrong with it. Will post pics asap, please help
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Someone posted previously about taking the valve seat piece (Black part the spring sit on) and cleaning the contact to the valve side with very light sandpaper after chucking it in a drill. Not enough to remove any material to speak of, just enough to rough up the surface a little bit, then re-assemble, fill and fire a couple of times. As for the stem being loose, you might be better off just getting a new seat and see if maybe the old one’s hole maybe just got stretched out a bit too much. Might just kill two birds with one stone. I so far haven’t had to do this on my older valve, but mine does have the bras insert, that does not have an o-ring inside it for the stem to seal on. So Maybe check out the Quick Reference Section, and you might just find the post about the stem/valve seat trick. Once again I have not tried this, I just remember seeing something on here about it, so proceed with caution.
Casey
Here’s some pics of it. There doesn’t seem to be much here and I couldn’t even find a orings at all anywhere inside. It was working fine then I drained the tank using a small coin and the filling adapter. For transport and now I’ve gone to fill it up and first thing was how loose the valave stem is it literally just wants to fall out. 2nd it’s leaking some where and I’ve checked the few parts in there and I just can’t see what’s wrong with it. Everything seems straight and true. Please help can it be saved or salvaged?
Please have a look and please let me know if I’m missing the obvious and if this has been posted before honestly sorry in advance I couldn’t find the same bizarre issue and after two today’s of research I’m not any closer please help sirs
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is it not leaking from the burst disk? these used to go….
if you pull out the valvestem/tophat a drop of saliva will show a valve seat leak.
inspect the metal surface of the seat. not the seal which is plastic but the metal seat.
i.e. inside the whole chunky big valve body. check for corrosion, may need polishing with lapping paper.
the plastic seal, you can spin the seal in a drill with a razorblade or scalpel you can shape its face.
years ago I was messing with my gunpower stealth that way. you can recover the seal that way.
you cant pump it up, I am pretty sure it needs a cylinder to pressurize it, or it will leak out/dump air at low pressure.
I would install the valve stem first, make sure sealing surfaces are perfect and clean both metal and plastic, install the seat on the corrugated end of the valve stem (the valve stem already in the valve body right) and make sure the plastic black seal stays on the stem. then install spring and put tension on the valve return spring. make sure you can push in the tophat and it has springy action. i.e. it returns. hopefully you noted how many turns the spring retainer had. before disassembly
when you rebuild the cylinder give it a healthy burst of air, slow fill may not shut the valve. you may find it will leak slightly but the leak will disapper when you fill to 160bar or so. once shut it will hold shut and you can shoot.