Hydraulic system seals

[Tony Hoffman]

I'm pretty sure thats the company I sent my first one to. Though, it was
about 8 years ago. We thougt they sounded good as well. Three months later,
they had not touched it, and finally after some not so nice words from my
wife they sent it back (it was for her V8).

I rebuilt it myself with a $12 kit, never had any other issues in 80k.

The o-rings are available through Audi, they are green now. THey are pretty
cheap, or at least were last time I bought any. I suspect they are made of
teh same material as AC ones, which are also green. A company right by me
has a HUGE selection of o-rings (they deal in gas well pumps) and most of
theirs are brown, not too sure what it's made of. But, they hold up very
well to anything I've thrown at them, including ATF and gasoline.

Tony

On Thu, Dec 29, 2011 at 10:01 AM, SAJanesick - Bellsouth <
sajanesick at bellsouth.net> wrote:

> I recently lost a seal where the high pressure hose attaches to the
> hydraulic pump.  According to the VagCat board drawings, there appears to
> be different size seals depending on which hose is attached.  I've matched
> the size, but I am concerned about the O-Ring composition.  The seal that
> blew out was a reddish orange seal versus the darker brown seal that is
> used on the hose from the hydraulic reservoir.
>
> Since it was over the holidays, I just picked up a generic O-Ring
> assortment from Harbor Freight and indeed found the right size that seems
> to be sealing with no apparent leaks.  The O-Rings are black and package
> states that they are made of  Nitrile and resistant to oil, grease, etc.
>
> Does anyone have any experience of using black Nitrile O-Rings within the
> hydraulic hoses fittings?  I've been told that Audi often uses very
> specific O-Rings of different color and material for different
> applications.  I have not gone to the dealer yet, but I could still get by
> there today or tomorrow.  In the meantime, I travel with wrenches, O-Ring
> assortment, towels and as much Chf11s as I can get my hands on - just in
> case.
>
> Also, I'm looking at having the hydraulic pump rebuilt by LARES
> http://www.larescorp.com/index.html up in Minnesota.  From what I can
> tell, they look like they know what they are doing, but I thought I'd check
> to see  if anyone has any prior experience with them.
>