Air in the hydraulic system - yikes!

[Max Hoepli]

Is this it?
http://buy1.snapon.com/catalog/item.asp?item_ID=68559&group_ID=369



----- Original Message ----- 
From: "Peter Golledge" <petergolledge at gmail.com>
To: "'Kunz, Bob'" <bob.kunz at hp.com>; <quattro at audifans.com>
Sent: 20, June 2006 17:56
Subject: RE: Air in the hydraulic system - yikes!


> Bob,
>
> As others have said...  Odds are very, very high it is the pump.  Rebuild
> kit is ~ $25 from what I recall.  Rebuild is not a huge issue, but it can
> take a couple of hours if things are gummed up.
>
> You have to press off/on the pulley and you need a "drag link socket" for
> the piston caps which can be obtained easily enough.  I can dig up the
> HOW-TO if required.
>
> Regards
>
> -----Original Message-----
> From: quattro-bounces at audifans.com [mailto:quattro-bounces at audifans.com]
On
> Behalf Of Kunz, Bob
> Sent: Tuesday, June 20, 2006 1:57 PM
> To: quattro at audifans.com
> Subject: Air in the hydraulic system - yikes!
>
> Hi all,
>
> Been trying to diagnose this problem on my '86 5Ks avant. The first
symptom
> was fluid overflow from the reservoir which I thought would be the
> accumulator not holding its fluid charge. Tested that out and it is fine.
>
> It appears that air is getting mixed in somewhere in the system. The
return
> flow from the steering rack is charged with air since it bubbles up in the
> reservoir and causes the fluid to foam and increase its volume. The only
> explanation I can come up with is a leak on the vacuum side of the system
> which is really only the one line from the reservoir to the pump. I have
> replaced that line with no change.
>
> Could the pump itself be the problem? Perhaps a crack on the vacuum side
of
> it? I can't think of anything else since the rest of the system is always
> under pressure. There are no leaks of fluid anywhere else. Of course the
> steering rack exhibits some air lock symptoms now (hard to initiate
turns).
> Anybody BTDT and have a solution?
>
> --bob
>
> '86 5Ks avant
> '02 TTQR
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