Childhood air gun without piston seal.

Forums Springers, Pumpers, C02, & Vintage Childhood air gun without piston seal.

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    Sohaib
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     have an air gun that is older than 25 years, but it used to work just fine until recently, when it lost so much power that it wouldn’t even shoot the pellet out of the barrel. Upon disassembling it, the piston turn out as can be seen in the image. Can someone help me on what type of piston seal does it have, or if it even has one? and what type of seal I should place on it. I know its extremely old, but its the gun I grew up with and I want to keep using it.

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    Sohaib
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    TimR
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    I have gotten piston seals from Vortek. Measure the cylinder bore, probably 25mm, very common. They have a piston seal kit that should work for you. Hope this helps!

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    JohnL57
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    It most likely had a leather seal which is probably crumbled and stuck at the end of the compression chamber along with the screw that held it to the piston. Make sure the end of the compression tube is clear before you reassemble the gun. You may need to dress the front edge of the piston with a file to remove burrs, as the piston looks a bit dented.

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    unionrdr
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    Yes. Some judicious use of a machine file is definitely in order here. Long, slow strokes. Take your time and don’t be overly-aggressive with the file. Then a little polishing with a wire wheel in a Dremel will do very nicely. I fix stock bolts and such for airguns that way while repairing or restomodding them.

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    Sohaib
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    Thanks man. I cleaned the compression chamber and got this out of there. Feels more like a rubber seal, but whatever it was, its done for it. Any idea what that silver metallic piece in the top left is? Its not a screw but it came out with all this .

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    JohnL57
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    It might be the pin that held the seal to the piston though I’ve always thought they were threaded, does it fit the hole in the piston? Kids have also been known to try and shoot nails or other things and they end up stuck in the compression tube. What kind of rifle is it?

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    scrane
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    What kind of gun is this?

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    Wadcutter
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    From the crude looking piston, I would say Chinese origin. Doesn’t look threaded so seal was probably pressed on. An adapter kit and seal are available from Vortek, but you may have to resize the hole and tap it for the adapter screw(usually metric).
    Link here for 25mm
    http://vortekproducts.com/ourstore/index.php?route=product/product&product_id=95&search=adapter
    Not sure it would be worth the money and effort if it is a 20.00 Chinese rifle though.

    Steven

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    scrane
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    That was my first thought, but 25 years sounds too old for an imported Chinese gun. Sure is rough, though.

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    Wadcutter
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    @scrane__I bought one either in 1996-97 as a beater rifle. It was unmarked other than Made in China and caliber. Stock was rough as a cob and I could bend the barrel just by cocking it. Never had it apart but the breech seal was leather. I paid 20.00 bucks new for it back then. Chinese imports have definitely improved since then.
     

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    MYSBarnOwl
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    I would recommend using a 220 grit brake cylinder hone in the receiver to remove scratches.  I picked one up from Amazon for less than $20.  Prior to honing the receiver clean it with soap and water or break cleaner.  Good luck.

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