Help my friend in China! CO2 pistal leak

[hzyl0402]

I meet a guy online, he bought a Co2 pistal and it's leaking co2 only after emptying 2 Cartridges. Since this thing is illegal in China, there is no where he can get this thing fixed. As shown in picture, the co2 leak out at the white spot. At the beginning, the leak was very slow, but now within 7-8 seconds the cartridge would be empty. He checked O ring, which is good.

Any experts can help this guy?

Liang

[hzyl0402]

come on guys, any idea is welcome!

[gamo2hammerli]

Maybe a speck of dirt got into the pin or valve?

He's in communist China....nothing much we can do to help him.  Especially if I remember correctly....airguns are not allowed to be used in China.

Only thing I can think of is to use high pressure air (Like a motorized tire pump) to blow into the outlet.....maybe it'll dislodge any particle in there.

A worst case scenario is maybe he bend the pin while removing a CO2 cylinder.  My friend did that to my old Crosman CO2 revolver.

[hzyl0402]

Maybe a speck of dirt got into the pin or valve?

He's in communist China....nothing much we can do to help him.  Especially if I remember correctly....airguns are not allowed to be used in China.

Only thing I can think of is to use high pressure air (Like a motorized tire pump) to blow into the outlet.....maybe it'll dislodge any particle in there.

A worst case scenario is maybe he bend the pin while removing a CO2 cylinder.  My friend did that to my old Crosman CO2 revolver.

Your remember is correct. But still few airgun enthusiasts there would pay times of the price and get one of these, also taking a risk of 10 years prison life. This guys paid $600 to get this airsoft co2 pistol, which looks worth at most 40 bucks, without warranty!! This is crazy. I feel so sorry that I decided to help him.
I will let him know your suggestion. Thanks.

Liang

[lloyd-ss]

I see the white dot where the leak is. 

Looking at the CO2 cartridge holder, it looks like the cartridge is installed into the holder, and the brass wheel is turned to pierce the cartridge, and then it should still be leak-free.  But when he pierces the cartridge, the CO2 all leaks out immediately.

If that is the case, is the CO2 valve up at the top of the removable CO2 holder?  If the valve is part of the CO2 holder, then the leak is probably inside  the valve.  If that is the case, disassembling the valve and cleaning it will probably fix the leak.  Look carefully at the valve seat and the mating surface of the valve itself for any nick or imperfection.  There should also be a pre-load spring that helps to keep the valve seated so that the CO2 doesn't leak.

If that makes sense, we can work from there.
Lloyd
 

[hzyl0402]

I see the white dot where the leak is. 

Looking at the CO2 cartridge holder, it looks like the cartridge is installed into the holder, and the brass wheel is turned to pierce the cartridge, and then it should still be leak-free.  But when he pierces the cartridge, the CO2 all leaks out immediately.

If that is the case, is the CO2 valve up at the top of the removable CO2 holder?  If the valve is part of the CO2 holder, then the leak is probably inside  the valve.  If that is the case, disassembling the valve and cleaning it will probably fix the leak.  Look carefully at the valve seat and the mating surface of the valve itself for any nick or imperfection.  There should also be a pre-load spring that helps to keep the valve seated so that the CO2 doesn't leak.

If that makes sense, we can work from there.
Lloyd
 

Thanks Lloyd,

It makes sense for me. He will be very happy to see your suggestions.

Liang

[lloyd-ss]

Have you tried to find an exploded view of the gun?  That would be very helpful.
Lloyd

[hzyl0402]

Have you tried to find an exploded view of the gun?  That would be very helpful.
Lloyd

No, I don't know the brand nor model of that gun. exploded view is a good idea, I will let him know. Thanks.

[lloyd-ss]

Have you tried to find an exploded view of the gun?  That would be very helpful.
Lloyd

No, I don't know the brand nor model of that gun. exploded view is a good idea, I will let him know. Thanks.

It looks like the name and model info show up in the picture.  If you come up with a link to a diagram, I will take a look and try and make an educated guess.
Lloyd