Bomb light coming on - '90 CQ

Kneale Brownson kneale at coslink.net
Sun Nov 5 18:00:44 EST 2006


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
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>>>>
>>>>   
>>>
>>
>




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