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 Post subject: Millennium pumper owners
PostPosted: Sun Mar 12, 2017 6:44 am 
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Joined: Sun Jan 09, 2011 8:07 am
Posts: 3320
Location: Central West River Nova Scotia
To any millennium pumper owners visiting this forum. During the R&D on the Freedom 700 SSP I discovered that using two O-rings on the pump head, caused a pressure trap between the them, making pumping effort much harder, especially on the up stroke. By replacing the inner O-ring with a split teflon washer just as a guide, or simply splitting the inner O-ring, made pumping much easier. I really don't know if this is an issue with the millennium pumper, but it might be something to try, just to see.

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PostPosted: Mon Mar 13, 2017 8:25 am 
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Joined: Thu Feb 02, 2006 11:35 pm
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Location: Alberta Canada
The running of 2 orings IMHO is redundant.
One quality ring is far more effective. Instead of the use of an oring the use of a quad ring provides far superior sealing and in the right material and durometer for the job provides better abrasion resistance.

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PostPosted: Mon Mar 13, 2017 8:17 pm 
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Location: Winnipeg, Canada
I have yet to see an O ring fail on a tube that's been properly cleaned, polished and lubed. And that is all on single ring flat top pistons. There is one here more than 10 years old still pushing air... I may be a bit on the zealous side when it comes to oil...

-D.S.

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PostPosted: Tue Mar 14, 2017 2:38 am 
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Location: Central West River Nova Scotia
Doc Sharptail wrote:
I have yet to see an O ring fail on a tube that's been properly cleaned, polished and lubed. And that is all on single ring flat top pistons. There is one here more than 10 years old still pushing air... I may be a bit on the zealous side when it comes to oil...

-D.S.

I am also a little over zealous with oli as well, however I did discover that the oil makes it way past the o-ring and eventually in to the bore. So I find myself stripping the gun down and cleaning the oil out down stream of the pump head, a little more often than I'd like. One would think a little residual oil in a pellet gun would be good, but I've found accuracy suffers a little with oil in the barrel.

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