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 Post subject: Shoe box orings
PostPosted: Sun May 19, 2013 10:32 pm 
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Joined: Sat Aug 02, 2008 2:14 pm
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Location: South of a Border!
Do any of you folks have sizes? It has been a great compressor until tonight, shut off at 2700 psi (400 psi early), bled everything off to verify gauges, will not pass 1600 psi now. I suspect something in 1st stage has let go.

Darren

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 Post subject: Re: Shoe box orings
PostPosted: Sun May 19, 2013 10:35 pm 
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Joined: Thu Oct 13, 2005 6:52 pm
Posts: 7145
Location: Vancouver Island BC
ralphtonka wrote:
Do any of you folks have sizes? It has been a great compressor until tonight, shut off at 2700 psi (400 psi early), bled everything off to verify gauges, will not pass 1600 psi now. I suspect something in 1st stage has let go.

Darren

I am sure Bob will know send him a PM


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 Post subject: Re: Shoe box orings
PostPosted: Sun May 19, 2013 10:39 pm 
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Location: South of a Border!
Thanks Brent

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 Post subject: Re: Shoe box orings
PostPosted: Sun May 19, 2013 10:39 pm 
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Joined: Thu Sep 18, 2008 6:11 pm
Posts: 1961
Location: SW Ontario:Canada
It is likely the first stage check o-ring. You should have got a spare with it.


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 Post subject: Re: Shoe box orings
PostPosted: Sun May 19, 2013 10:42 pm 
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Location: Coalmont BC
The only O-rings I have a problem with are the white high-pressure ones.... they are 1/4" OD x 1/8" ID and I believe a high quality polyurethane?.... I bought mine direct, they were cheap, and they sent them in an envelope, also cheap....

Bob

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 Post subject: Re: Shoe box orings
PostPosted: Sun May 19, 2013 10:44 pm 
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Wow! love the forum......Was about to Pm Bob

Thanks

Darren

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 Post subject: Re: Shoe box orings
PostPosted: Sun May 19, 2013 11:16 pm 
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Location: South of a Border!
idontknowjack wrote:
It is likely the first stage check o-ring. You should have got a spare with it.



Thanks for kicking me in the @ss! Got me digging through spare parts........You sir are Correct i have spares, And r-01 (1/8x1/4) and r-03 (1/4x3/8) may work as spares. Do not quote me on this, they might be off a touch

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 Post subject: Re: Shoe box orings
PostPosted: Sun May 19, 2013 11:28 pm 
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Location: SW Ontario:Canada
According to the shoebox site, the problem will be with the second stage, lower cylinder o-rings. The 1/8th white urethane ones.


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 Post subject: Re: Shoe box orings
PostPosted: Sun May 19, 2013 11:37 pm 
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Location: Coalmont BC
Those are the only ones I have ever replaced.... the white 1/8" ID lower ones.... Actually, at 75 hours I just swapped the two around (high pressure to low pressure side) as only the left hand (inside) high pressure one (closest to the check valve) was worn.... then at 150 hours I replaced both.... I now have over 250 hours with no further problems.... I think the piston rod is polishing itself and reducing the O-ring wear.... I've never even had my first stage (the upper one with the 1/4" rod) apart....

Bob

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Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal;
Too many! Springers, Pumpers, CO2, but I love my PCPs and developing them!
Proud Member of the 2000+fps Club!


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 Post subject: Re: Shoe box orings
PostPosted: Sun May 19, 2013 11:47 pm 
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Location: South of a Border!
Thanks again!

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 Post subject: Re: Shoe box orings
PostPosted: Mon May 20, 2013 4:27 pm 
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Location: South of a Border!
Back up and running! :mrgreen:

Found left white oring in back check valve section of lower cylinder...........????, oring looked good, swapped the two white orings around (no new parts). Fired up, dead headed against closed scuba, hit 3300 psi in no time

The locknut was loose......maybe the culprit!

Darren

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Daisy 188 "Repeater" and
a Detuned at44


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 Post subject: Re: Shoe box orings
PostPosted: Mon May 20, 2013 4:29 pm 
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Joined: Thu Sep 18, 2008 6:11 pm
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Location: SW Ontario:Canada
Good to hear Darren. Glad you got it sorted.


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