Re: How do I change Hydraulic Fluid? Pump Reseal

["Fred Munro" <munrof@isys.ca>]

PLEASE NOTE: On all cars which have the brake bomb, the brake pedal must be
pumped 40 times with the engine off to ensure that the bomb is discharged.
Opening up a line containing hydraulic fluid at 3000 psig is not recommended
practice and may be detrimental to your continued well-being.

Fred Munro
'94 S4  91k km

----- Original Message -----
From: Kneale Brownson <knotnook@traverse.com>
To: Alexander van Gerbig <Audi_80@email.msn.com>; Quattro List
<quattro@audifans.com>
Sent: Friday, October 29, 1999 5:07 PM
Subject: Re: How do I change Hydraulic Fluid? Pump Reseal


> I don't remember hydraulic fluid being under pressure when I removed my ps
> pump for resealing on my '87 5kcstq, Alexander.  I think it just leaks out
> some as you loosen the connections and runs out as you manipulate the pump
> to get it off the car.  You could try sucking the fluid out of the pump
> with a small version of a turkey baster or something, but I just put a lot
> of rags and paper towels around it and let them collect the fluid.
>
> You need new crush washers (two per connection) for each side of each
banjo
> assembly (the 5k's have three connections, each a different size from the
> others).  I got my seal kit from Carlsen, along with the crush washers.
> New washers are something like 25-30 cents each, while the O-ring set was
> something like $20-25.
>
> I did a complete replacement of Pentosin because I figured there'd be
> pieces of failed O-ring floating in the oil.  My pump was surprisingly
> clean inside, so I decided after thinking about it that my seal failure
> probably was related to a quick-oil-change fool pouring brake fluid into
> the reservoir before I realized what was going on.
>
> I reinstalled the pump completely except for reconnecting the hoses and
> then put in new fluid while turning the pump by hand to make certain it
> circulated throughout.  You do not want to run the pump without oil in it.
> I used the small baster mentioned above to put small amounts of oil into
> the opening for the return line,  and then turn the pump,  repeatedly
until
> fluid came out of the output connections.  Another job involving a bunch
of
> rags.
>
> Kneale Brownson
>
>
> At 03:43 PM 10/29/99 -0400, Alexander van Gerbig wrote:
> >    Need to reseal the hydraulic pump I have or replace with the extra
used
> >one I have.  It is leaking the fabulous green stuff quite quickly now,
spot
> >on the garage last night.  I am wondering what is going to happen when I
> >undo the lines to the pump?  Is the fluid going to leak out, or flow out
> >quickly?  Will the fluid remain in the lines because of pressure holding
it
> >in?
> >    Now once I know that I will crack the pump and take a looksee.  I
have
> >another used pump, but need the change the pulley wheel on it since it is
> >bent.  I cracked that open a while ago to teach myself how it works and
what
> >seals are in there.  Shoudln't be to hard to replace or get a seal kit
for
> >the existing pump.  Just not sure about what the fluid will do and all
that.
> >Bentley just says add fluid and the system will bleed itself?
> >
> >Thanks!
> >
> >Alexander van Gerbig
> >'88 Audi 80 -- Koni Yellows, G&M Springs
> >HÖR Technologies Sport Hydro Cam, K&N Filter
> >Borbet Type T, Dunlop SP9000 Sport
> >
> >The Audi 80 Pages------------------
> >http://surf.to/the80pages.com
> >
> >German Parts Importing------------
> >(914)-232-7467
> >
> >Katonah, NY 10536
> >
> >
>
>