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 Post subject: 2250 valve install mod
PostPosted: Wed Mar 05, 2014 4:37 pm 
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Location: Central West River Nova Scotia
I had a lot of trouble getting my valve to seal. Could be the O ring was the wrong size. I did have it sealed once but I lost all the air over time. So I decided to FIX the problem. I used the same system as the EunJin Sumatra. Which compresses an o ring in between the two parts of the valve and thus buldges it out against the tube walls forming a perfect seal. Here are some pic,s of what I,ve done. In the first pic it shows the new O ring on top and the original below. I cut a couple of notches in the end of the valve where I use a tool to tighten it after its in the tube and secured with the retaining screw. I had to make a tool for tightening it , as I didn,t have one wide enough to span the valve width. It,s crude at the moment , but I will refine the tool later. but for testing, it serves the purpose. So all you do is put the new o ring in, connect the two halves loosely, slide it into the tube, attach the retaining screw or screw,s, then with the tool, tighten the inlet half of the valve till it,s tight. I have tested this and it works perfectly. As with any mod presented in this forum, I welcome any input from you guy,s, regarding safety issues I may have with this design.


ImageImageImageImageImageImageImage

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PostPosted: Wed Mar 05, 2014 5:30 pm 
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Good thinking Joe!!!

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PostPosted: Wed Mar 05, 2014 6:02 pm 
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Joe where did u get that front part of the valve? i have a similar front valve in my 2260 but mine is longer twice the size of yours, but mine has two O rings at the front. i bought the 2250 now 2260 from a member here and it came with that weird long valve but i never asked the guy where he got it from

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PostPosted: Wed Mar 05, 2014 6:53 pm 
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Ok Joe my question is to you. Now that you have a better seal upon your valve its still down stream of your frame front screw. Now if you were leaking upon the front seal pressure side of the grip screw. How are you sealing the grip screw from leaking?

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PostPosted: Wed Mar 05, 2014 8:30 pm 
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Whitewolf wrote:
Ok Joe my question is to you. Now that you have a better seal upon your valve its still down stream of your frame front screw. Now if you were leaking upon the front seal pressure side of the grip screw. How are you sealing the grip screw from leaking?

Good point. I found that out after it slowly leaked out again. I guess I prematurely posted before waiting for sure. My apologies for getting hopes up. Back to the drawing board.

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PostPosted: Wed Mar 05, 2014 9:10 pm 
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joe hickey wrote:
Whitewolf wrote:
Ok Joe my question is to you. Now that you have a better seal upon your valve its still down stream of your frame front screw. Now if you were leaking upon the front seal pressure side of the grip screw. How are you sealing the grip screw from leaking?

Good point. I found that out after it slowly leaked out again. I guess I prematurely posted before waiting for sure. My apologies for getting hopes up. Back to the drawing board.


Might I suggest you take 1/4 teflon tape fold in half the long way wrap your pressure side oring groove twice then replace your oring. Its not the best fix but will take your leak away for a longer time then your facing now until you can get a proper seal.

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PostPosted: Wed Mar 05, 2014 9:34 pm 
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Adolfo wrote:
Joe where did u get that front part of the valve? i have a similar front valve in my 2260 but mine is longer twice the size of yours, but mine has two O rings at the front. i bought the 2250 now 2260 from a member here and it came with that weird long valve but i never asked the guy where he got it from

I got it from moltogordo in a box of misc. Parts. I, m using it in a 2250D tube.

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PostPosted: Wed Mar 05, 2014 9:37 pm 
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Whitewolf wrote:
joe hickey wrote:
Whitewolf wrote:
Ok Joe my question is to you. Now that you have a better seal upon your valve its still down stream of your frame front screw. Now if you were leaking upon the front seal pressure side of the grip screw. How are you sealing the grip screw from leaking?

Good point. I found that out after it slowly leaked out again. I guess I prematurely posted before waiting for sure. My apologies for getting hopes up. Back to the drawing board.


Might I suggest you take 1/4 teflon tape fold in half the long way wrap your pressure side oring groove twice then replace your oring. Its not the best fix but will take your leak away for a longer time then your facing now until you can get a proper seal.

Do you think red thread lock would seal the frame front mount hole ?

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PostPosted: Wed Mar 05, 2014 9:42 pm 
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Whitewolf wrote:
[Might I suggest you take 1/4 teflon tape fold in half the long way wrap your pressure side oring groove twice then replace your oring. Its not the best fix but will take your leak away for a longer time then your facing now until you can get a proper seal.


^^^^ yes !! :wink:
quick and easy salution, but first make sure there is not cuts in the o-ring.

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PostPosted: Wed Mar 05, 2014 9:58 pm 
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joe hickey wrote:
Good point. I found that out after it slowly leaked out again. I guess I prematurely posted before waiting for sure. My apologies for getting hopes up. Back to the drawing board.


Might I suggest you take 1/4 teflon tape fold in half the long way wrap your pressure side oring groove twice then replace your oring. Its not the best fix but will take your leak away for a longer time then your facing now until you can get a proper seal.[/quote]
Do you think red thread lock would seal the frame front mount hole ?[/quote]

It might, but there are not that many threads there. Then :? is the condition of the tube threads and the screw threads. Clearances mean every when dealing with pressure. :(

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PostPosted: Wed Mar 05, 2014 10:46 pm 
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You can also try a 90 Durometer O-ring instead of a 70 D.... may cure your problem....

Bob

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PostPosted: Thu Mar 06, 2014 12:19 am 
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Remove oring to the check that there are no scratches from hacksaw when cutting that slot.
Looks pretty deep in the one pic.

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PostPosted: Thu Mar 06, 2014 6:37 am 
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I replaced the o ring and the new one was just a standard o ring from a selection box sold locally. I'm not sure where to get a 90D o ring locally, and don't want to pay $6 plus shipping for one. Just the principal of it. I'll check out the local hydraulic part,s dealer, but I'm unsure how to measure for the correct size other than trial and error. Width and inside dia. is no problem, but how much OD. for proper compression in the tube escapes me. The original o ring is long gone, so I have nothing to measure other than the tube itself.

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PostPosted: Thu Mar 06, 2014 10:09 am 
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joe hickey wrote:
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Joe i just had another look at the slots you cut and they go pretty deep into the o-ring groove not sure you'll get a good seal no matter what o-ring you use now because air will travel through and under that slot. I think your going to need another top section of the valve.

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PostPosted: Thu Mar 06, 2014 10:47 am 
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If you are using a 2250 tube (which you are), then a regular Disco valve front will work perfectly. A Disco front is long enough to cover the roll stamp on a 2250 tube but not a 2240/60tube.

Just a thought... :wink:

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