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Air Gun Home Forum Index » Rifles » Piston seal question.
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Piston seal question. 
PostPosted: Tue Mar 31, 2009 1:24 pm Reply with quote
TerrySpringer
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Joined: 06 Jul 2008
Posts: 9
Hello guys,

so i bought a new pistonseal for my quest 1000,
it's a gamo tesla seal made by maccari.
since i got a new chrony i'm kinda tinkering with
it a bit to see if i can get any more juice out of
this gun. you guys must know what i mean Wink.
after i finally got the darn thing on the piston i
noticed that the seal was not flush with the "button"
on the piston, like my factory seal was. they are
the same diameter though.
is this a bad thing? i'm a noob at tuning these rifles
so i thought i'd post it on the forum before i
really screw it up.

also i got some piston buttons too. i'm curious to see
how the gun will fire after i install everything and lube'r up Mr. Green .
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PostPosted: Tue Mar 31, 2009 2:40 pm Reply with quote
broommaster2000
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Location: City of Groningen, Groningen, The Netherlands
Welcome aboard Terry!

Aftermarket piston seals are often a bit oversized because they have to go with several different rifles. Neutral I think you'll have to size it down a bit. Neutral

How? I think other members will help you with that. Mr. Green

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PostPosted: Tue Mar 31, 2009 3:21 pm Reply with quote
Slavia
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A photo would help.

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PostPosted: Tue Mar 31, 2009 4:53 pm Reply with quote
TerrySpringer
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Posts: 9
ok i got a pic..
i also noticed some rough spots on the piston in need of a polish.

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PostPosted: Tue Mar 31, 2009 8:14 pm Reply with quote
kanyon
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Joined: 09 Aug 2008
Posts: 1582
Location: New Zealand
Thats all good most of my guns have the seal potruding passed the button
1 or 2 mill.....
May be a bit quiter if you are unlucky enough to
dry fire it. Embarassed Shocked Crying or Very sad Mad
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PostPosted: Wed Apr 01, 2009 4:44 am Reply with quote
Alstone
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Location: Linconshire, ENGLAND
It's supposed to be like that otherwise the piston button would slam in to the compression chamber end on each shot, by sitting proud the seal act's like a shock absorber.

Al

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PostPosted: Wed Apr 01, 2009 9:31 am Reply with quote
Slavia
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Location: Waseca, Minnesota, USA
Quote:
by sitting proud the seal act's like a shock absorber


But do avoid very light pellets and never dry-fire - cushioning is good; mashing is bad.

I suppose if there were metal-to-metal contact between the piston and the cylinder head you could eventually hammer the transfer port closed.

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Piston seal question. 
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