Hydraulic system problems ('85 5000 turbo)

[Kneale Brownson]

Fluid level goes down normally when you run the engine.


At 03:17 PM 8/17/2006 -0400, Ameer Antar wrote:
>
>Thanks for the responses. The pump was a rebuilt one from ebay. It's 
>definitely in better shape than the original.
> 
>So in normal operation, should the fluid level change that much? If not, it 
>does sound like air in the system. Air can be compressed, making the fluid 
>go down when pressurized. I used the Bentley procedure for bleeding the 
>system: front wheels off the ground and turning lock-lock, as Huw mentioned, 
>but it didn't seem to do too much.
> 
>The highest point in the system is the reservoir, servo or the pump itself. 
>Do you think it would be safe to crack open the banjo bolts while running 
>the engine to see if air is stuck there? Thanks again.
> 
> 
>-Ameer
> 
>-------------------- Original Message --------------------
>From:Huw Powell [audi at humanspeakers.com]
>To:Ameer Antar [antar at comcast.net]
>Cc:Quattro List [quattro at audifans.com]
>Date:8/17/06 2:38:26 PM
>Subject:Re: Hydraulic system problems ('85 5000 turbo)
>> The power assist does seem to randomly change.
>
>> Also, I noticed that the fluid level in the reservoir changes a lot.
>
>Without being an expert on this particular system, I would have to say
>my first suspect here is a lot of air still in the system. It probably
>moves around, and ends up cavitating the pump while its running,
>killing, or at least randomizing, your pressure and assist.
>
>I do believe I have read here that bleeding the system is a complex
>process (but that might have been the cooling system!).
>
>I don't know if you need to elevate one end of the car at all, but I'm
>sure you have to turn the steering (with system running) from lock to
>lock several times.
>
>Looking at it, you might be able to see where the high points, etc., are
>and determine the best way to make sure it is air-free.
>
>--
>Huw Powell
>
>(http://www.humanspeakers.com/audi) http://www.humanspeakers.com/audi
>
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