Hey all, I’m new to PCP. I just received a Hatsan Flash QE. I am trying to fill it with a hand pump but it’s leaking from the breech area. I have been watching videos on it and some of them say it comes filled. Just wondering if I have a leaker from factory? Anything I should try?
Hatsan Flash QE
- Thread starter tresguey
- Start date
Cock it back and leave it in the rear position.
If its empty the hammer will be on the valve and keeping it open
If its empty the hammer will be on the valve and keeping it open
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I’ve tried it back and down, just back, forward, forward decocked. All variations a few times in safety and in fire.
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Valve must be open a little and the hand pump doesn't allow enough air quickly to close it. I'm sorry I don't have an answer, maybe someone else does. Do you have a friend with a tank to try and fill from?
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Could try striking butt of gun with hand, rubber mallet or against large book. This method has worked while filling with high pressure air compressor, not so much with hand pump. Guess worth a try, nothing too heavy-handed, just trying to jolt that valve closed. If someone could operate hand pump while you strike the gun butt, who knows? Best of Luck, WM
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If you have a regular compressor with the air blowing attachment, maybe use that to blow in a hundred psi or so real fast that may work if completely empty. Meaning 0 pressure.
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No one I know with a fill bottle, I did try to rig it up to my home compressor and hit it with 150 psi no luck. And I tried banging the butt on the ground when I had the home compressor hooked up. I do scuba dive and have a couple empty tanks. I will start looking on Amazon for an adapter. I think I’m just going to send the hand pump I got off Amazon back. It was $100, and spend the $139 more to get this Orion pump that looks exactly like the yong heng compressor I’ve seen a lot of videos on.
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Sorry for your troubles. When you get it up and running you may find, as I did, that the “QE” system is pretty much a joke. My .22 cal was. VERY loud. There is a guy selling a 3d printed 10 baffle stack that replaces the worthless factory pieces. Works like a charm! Now it is actually a Quiet system. 
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I forgot to mention, the Flashpup the only gun that I have That I would consider hand pump friendly. Only 2k psi max fill and shoot it down to 1k. Not too hard to refill from there. That is the only reason I am keeping it. Can go walk in the woods without having to pack a pony tank. Around fifty strokes on the pump and you’re good.
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I've had luck seating a valve poppet with a hand pump by just going to town on it really fast. Just stretch and warm up first so you don't throw your back out. It's great cardio!
Can also put a few drops of silicone oil in the fill probe and pump that in. It needs it anyhow, and it'll coat the valve seal a little bit to make it stick better
Good luck!
DR. K
Can also put a few drops of silicone oil in the fill probe and pump that in. It needs it anyhow, and it'll coat the valve seal a little bit to make it stick better
Good luck!
DR. K
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Thanks all for your help. I just received my din adapter for my scuba tanks and tried it out. One of my scuba tanks was at about 1.5 bar. I got the leaking to stop and just now and topped it off with the hand pump. Time to see if I can get this scope dialed in. It’s a Veyron 4-16 FFP. Im an old school iron sight Marine. Even the red dot things on my powder burners I had to get used to…lol…my next purchase will be a compressor for sure!
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Thanks for the suggestion, I watched a few videos on this. I was also eyeballing a 0DB moderator.
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