[s-cars] Bomb light coming on - '90 CQ

[Douglas Fifield]

All,

Just did a booster test and replace on my 95.5 S6 avant a couple of
months ago and did a write up on it.  Ping me off list and I'll shoot
you a copy.

D.

On 11/5/06, Kneale Brownson <kneale at coslink.net> wrote:
> I thought this was about a 5ktq, not your coupe.  I don't know anything about
> the plumbing of the coupes and I don't have any reference material on them.
> But I'd say you should still be able to undo that line at the servo, or at
> least loosen it a bit, to see whether it seaps a couple drops or a steady flow.
>
>
> At 07:02 PM 11/5/2006 -0500, Dave Kase wrote:
> >
> > On the CQ that line from the servo (behind the master cyl) goes to a joint
> > return line with the bomb and rack.
> >
> > It looks like that is the only line in/out of the booster.  Where will the
> > fluid come from if the only line is unhooked?  I take it there must be a
> > supply line as well that I am missing.
> >
> > DK
> >
> > Kneale Brownson wrote:
> >>
> >> There is a line coming off the booster right behind the brake master
> >> cylinder.  Starts out as a piece of brake pipe and then becomes a hose.
> >> Goes into the reservoir at the top of the reservoir.  Should be only one
> >> line, one connection to the reservoir.  In the Bentley for the 5k cars, page
> >> 47.20, it says to unscrew the return line at the servo.  If hydraulic oil
> >> runs continuously (with the engine off), the servo is bad.  If only a few
> >> drops come out, it's OK.  I've never unscrewed the metal pipe.  I've undone
> >> the hose clamp holding the hose to the reservoir.
> >>
> >> Your description sounds like you're looking at the return line from the
> >> "bomb" to the reservoir.  That goes to the bottom of the reservoir.  Again,
> >> you want to go to the booster, or servo, that the master cylinder mounts to.
> >>
> >>
> >> At 03:02 PM 11/5/2006 -0500, Dave Kase wrote:
> >>>
> >>> I''m not sure I understand.  There is one line from the booster to the
> >>> resevoir return lines (goes into a 4-way fitting).  If I pull that line I
> >>> get all the hyd fluid returning from the rack - a stream.
> >>>
> >>> What am I missing?
> >>>
> >>> DK
> >>>
> >>> Kneale Brownson wrote:
> >>>>
> >>>> I'm talking about the booster, the device to which the master cylinder is
> >>>> mounted.  Pull the return hose from the booster off the reservoir nipple.
> >>>> You should only get a drop or two of hydraulic oil out of it.  If you get
> >>>> a stream, the booster needs replacement.
> >>>>
> >>>>
> >>>> At 11:26 AM 11/5/2006 -0500, Dave Kase wrote:
> >>>>>
> >>>>> I tried two of my own recharged bombs on it, same result.
> >>>>>
> >>>>> DK
> >>>>>
> >>>>> Kneale Brownson wrote:
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> Bad booster?
> >>>>>>
> >>>>>>
> >>>>>> At 01:50 AM 11/5/2006 -0500, Dave Kase wrote:
> >>>>>>
> >>>>>>>
> >>>>>>> Even with a fresh bomb the yellow bomb light comes on! Dave Kase '91
> >>>>>>> e//S2 '90 CQ - sold _______________________________________________
> >>>>>>> quattro mailing list <mailto:quattro at audifans.com>quattro at audifans.com
> >>>>>>> http://www.audifans.com/mailman/listinfo/quattro --- Watch this space
> >>>>>>> for ads :)
> >>>>>>
> >>>>>>
> >>>>>
> >>>>
> >>>
> >>
> >
>
>
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-- 
Douglas in MN
95.5 Audi S//6 Avant
73 BMW R60/5 mit Toaster Tank