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Old 25-05-2011, 07:02   #1
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Purging Backstay Tensioner

I have hydra II backstay tensioner. It was leaking so I replaced damaged o-rings. Namely the one on the cylinder. Inspected all other ones and put the unit back together. Somehow its not holding pressure or tensioning the back stay. When I pump it its not pulling the rod in. Are there any instructions on how to purge it or properly fill with oil so that it works.
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Old 31-05-2011, 07:46   #2
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Re: Purging Backstay Tensioner

I ended up taking it to a hydraulics shop, I had inadvertently lost a little ball on the release valve. That was causing it to no build pressure.
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Old 14-06-2011, 19:26   #3
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Re: Purging Backstay Tensioner

Hi phorvati,

I'm rebuilding one of these and wanted to ask you what type and how much fluid did you use.

Thanks for your time.

Alan
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