Hatsan Flashpup .25

[john103141]

I received a Hatsan Flashpup .25 today. I had paid to have it test fired and the results looked good. Since this is new to me I do not know what to expect from using a handpump to charge up to 200 BAR? It came charged to 150 BAR. I connected a handpump up to it to attempt to charge it to 200 BAR but I never succeeded. I have no experience so I do not know what to expect. I have it more than 100 pumps but never saw the rifle pressure gauge move off of 150 BAR. Any comments please.

 

[silvershooter589]

Try cocking it, decocking it, etc... sometimes that helps.

Also, air must be escaping somewhere. Is it escaping from the fill port, or is it escaping out of the barrel of the gun? That's a good clue.

 

[gxs]

It really depends on the pump but you'll have to pump quite a lot to get it of of 150. How many pumps depends on the line and filter as you need to reach a pressure of more than 150 bar to fill it.

My friend has a Flashpup and he pumps it all the time. It's his only source of air and I know that he said he gets some good exercise with the pump.

Do you hear any air leaking or anything?

He had some problems with the one way valve not closing at first but one fill with my air tank fixed the problem. But that was when the gun was at 0. On 150 it shouldn't leak.

 

[silvershooter589]

GXS good tip on hearing the air. I have a Hatsan Hydra which is basically the same gun. If I don't cock it (or de-cock it, I forget), the air will hiss/squeak from the fill probe as I pump it.

You are also right that at 150 bar you would think it's not the valve seal.

Try cocking or de-cocking and pump again ... easy guns to fill with a hand pump due to the smaller tank and lower max PSI. Also very light and ergonomic, fun to shoot. Make sure you get some H&N Hunters (not the Hunter Extreme). Your gun loves that particular ammo, even though it can be very pellet picky otherwise.

 

[gxs]

Oh one important question.... Forget the rifle gauge. What does the pump gauge show? Does it go up to 150?

Also I'd do what @silvershooter589 said. You can also put the safety to on and leave the gun cocked to release the tension from the valve pin although again at 150bar there should be plenty of force.

 

[MikeVV]

Try cocking it, decocking it, etc... sometimes that helps.

Also, air must be escaping somewhere. Is it escaping from the fill port, or is it escaping out of the barrel of the gun? That's a good clue.

When the gun has "some" pressure in the cylinder, you...don't...need to cock the gun.

With 100 pumps on your pump, either the pump is faulty or the cylinder gauge is faulty.
Those 100 pumps should have gotten pretty difficult at 175 or so bar. But 200 bar should be plenty diable...provided you weigh more than 175 or so pounds !

Also...do NOT, let the lower area of the pump get hot. If it's working correctly, it should have started getting warm at about 50 pumps.

If...the pumping action, did not get difficult, around 40 or 50 pumps, there's most likely a problem with the pump not sealing internally.

Last thing, when everything is working correctly, I've found that, when you pull the handle up, pull it "all..." the way up. Don't stop part way. And equally important, when you hit the bottom of the stroke, hold the handle there for a second or two. This will help make sure that the air has past the valve in the guns air cylinder.

Good luck.

Mike

 

[silvershooter589]

It could also be that the probe o-rings aren't perfect. I have a Kral NP-03 that only fills to about 2200 psi before it starts hissing.

I use my compatible Hatsan probe that has better o-rings and it fills all the way.

 

[Headshots]

Did you tighten the bleed screw on the pump.,?

 

[john103141]

Thanks for all of your replies. The Flashpup was a delight to shoot today. As for the pump, I've requested a return on it. I'm 81 and prefer to exchange it for an electric pump.