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All Springer/NP/PCP Air Gun Discussion General > American/U.S. Air Gun Gates

Weird piston seal

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Camel73:
Thank you for the replies. Hmm.. let's try the piston cylinder pics again.

Any tips on where to get a quality seal?

Motorhead:

--- Quote from: Camel73 on July 01, 2016, 07:08:18 PM ---Thank you for the replies. Hmm.. let's try the piston cylinder pics again.

Any tips on where to get a quality seal?

--- End quote ---

Air rifle headquarters .... James Macarri Inc.

a70eliminator:
I'd dress those scrapes with a fine file then polish smooth with a dremmel & polishing compound, looks like it was the cocking slot that has the sharpies causing the piston scraping so deburr and polish that too especially on the underside where the piston slides past.
The cpmpression chamber would also be the focus of special attention, inspect with a flashlight for any scraping, you'll need to polish those out too, some 220 and or 360 depending on how bad, finally CLEAN CLEAN CLEAN and clean again until absolutely microscopically clean, put it back together with kit gloves and a little moly goes long way.

anuthabubba:
Could also glue some 'buttons' on that piston. I have used spray-on, dry lube moly on piston skirts and upper inside of the main tube where the piston runs during cocking. A few coats (let dry between) to prevent metal to metal contact.

https://www.zoro.com/crc-dry-moly-lubricant-aerosol-can-16-oz-03084/i/G1197034/?utm_term=A_PB20_Fluids&utm_source=bing&utm_medium=cpc&utm_campaign=PLA_US&utm_content=PB20&gclid=COmt6tO41s0CFSv5MgodWgwAHw&gclsrc=ds

DOKF:
Last gun on the rack? 

It was probably dry fired in the store ...  And maybe left cocked for days, weeks ...

I looked at the local Cabela's a couple days ago.  All the break barrels on the rack (out of box) were already cocked, although some had trigger locks to prevent firing.

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