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 Post subject: Sealing old CO2 airguns.
PostPosted: Sun May 04, 2014 11:29 pm 
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Joined: Sat Feb 23, 2013 12:20 am
Posts: 58
Location: Central Alberta
On the Daisy Mod. 200 pistol, the piercing needle itself appears to have been expected to seal the gas from leaking out. There is no "seal" surrounding the needle anyway.
It was actually quite simple to turn up a modified holder for the piercing needle to accommodate a seal, which cured my problem.
Being a north American made beast, the thread is 1/4 inch NF and rather than use a thread sealant, I cut a couple of washers from an old Tupperware lid, which seemed about the right thickness and soft enough, without being brittle.
daisy2.jpg [ 134.55 KiB | Viewed 489 times ]

I also managed to stop my Crosman 622 from leaking with the aid of some suitable material donated (and hand delivered to boot!) by our "plasticman". Thanks again plasticman.
My 622 must be one of the earliest models made. When I located the repair manual, there had been several modifications, not found on mine. I added a few mods of my own and, if spring ever arrives, I'll try it out at the farm. It's been holding CO2 for several weeks.

Cheers! Hamish.

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