NEED HELP pressure bleeding clutch slave difficulties

[Jesse Clendenning]

I first did clutch slave bleeding on my father-in-law's '875kq. It worked as
I expected and I was able to bleed it just by pumping and opening and
closing the bleed screw.

Then a couple of months ago I did the slave cylinder on my '865ktq. Even
though the parts were the same, I could not bleed it. I tried everything. I
did this for 3 days solid wasting at least a liter of brake fluid. I was
ready to try anything. I read a post in the archives about a Mercedes trick
where they would attach the bleeder from the left front caliper to the
bleeder on the clutch slave. Pump the brake pedal, opening and closing both
bleeders. I was done in just a couple of minutes.

Couldn't recomend it more. Neither can John Forbes from the sounds of it.

AWDAudi at Excite.com
----- Original Message -----
From: "passat TS" <passat_ts at hotmail.com>
To: <benswann at comcast.net>; <quattro at audifans.com>
Cc: <shoemakersp at comcast.net>
Sent: Friday, April 04, 2003 10:00 AM
Subject: Re: NEED HELP pressure bleeding clutch slave difficulties


> [ Converted text/html to text/plain ]
>
> Hydraulic systems are pretty simple. If you are applying pressure in the
> system that's open, the fluid must get out from the opening(bleeder).
That's
> the whole principle.
>
> I only see two possible things:
>
> 1. Either or both(less likely) cylinders are jammed. Manufacturer defect
or
> assembling.
>
> 2. There is something blocking the system. I suggest disconnect the hose
on
> the slave side and pump (foot or pressure bleeder). If fluid comes then
you
> have a slave jammed or blocked. Then work your way up in the system (the
> connector, the coil tube, the master and the hose from the resevoir).
>
> I hope it helps, good luck,
>
> Carlos.
>
>
>
>
>
>
> >From: ben swann
> >To: quattro at audifans.com
> >CC: shoemakersp at comcast.net
> >Subject: NEED HELP pressure bleeding clutch slave difficulties
> >Date: Fri, 04 Apr 2003 09:29:22 -0500
> >
> >As Sean mentions below, we are having trouble bleeding the newly
> >installed slave cylinder. I have done this before on 5ktq, but for
> >some reason, this time it is not working as expected.
> >
> >Shouldn't there be a steady stream of fluid/air&fluid coming from the
> >bleeder fitting on the slave cylinder, when pressure is applied?
> >
> >I have the reservior chock full of fluid, so no air can get into the
> >line feeding the clutch hydraulics.
> >
> >We resorted to trying to manually bleed - depressing the pedal with
> >bleeder open, then pulling back up with bleeder closed, in hopes to
> >force air out and draw the fluid in. Nothing/no combination of
> >pressure bleeding or manual bleeding seems to be working. We have
> >probably had a good pint of fluid come out the bleeder - it was
> >bleeding at first - air -> air and fluid -> mostly fluid -> nothing.
> >
> >Now the pedal just gets sucked to the floor when depressed slightly. I
> >have to admit I'm a little frustrated at this point.
> >
> >We'd appreciate any helpful tips on this or BTDT.
> >
> >Ben
> >
> >[Date: Thu, 03 Apr 2003 20:38:09 -0500
> >From: shoemakersp
> >Subject: NEED HELP pressure bleeding clutch slave difficulties
> >To: Quattro List
> >
> >My friend and I are desperately attempting to button up the clutch swap
> >in my '87 5000CS TQ wagon. We replaced the clutch slave cylinder as
> >part of a throw-out bearing change. We are now having problems
> >restoring pedal pressure at the clutch. This has drawn into a
> >stalemate that would make one wonder if there is something wrong or
> >perhaps we are doing this wrong. Here is the rough series of events to
> >this point.
> >
> >1. We attached the pressure bleeder to the top of the brake fluid
> >reservoir, applied pressure and opened the bleed valve on the slave
> >cylinder.
> >
> >2. This resulted in much sputtering and a fluid air mix coming out. We
> >went through quite a bit of fluid before it was a stream. He then
> >retightened the valve.
> >
> >3. I attempted to depress the pedal and it snapped to the floor. We
> >then tried to pump the fluid through with the pedal by opening the
> >valve on the down stroke and closing it on the upstroke.
> >
> >4. At some point I had resistance through the last 2 inches of travel,
> >but that was the best we got. Now we can apply pressure to the
> >reservoir and open the valve and nothing comes out.
> >
> >I hope this is enough info for someone to see what the problem might
> >be. My friend is now worried that something may have become lodged in
> >the line because of the lack of fluid shooting everywhere that it
> >should. The Bentley doesn't seem to provide much help here other than
> >to say that you need to use a pressure bleeder.
> >
> >I hope someone can help, thank you for all of the help everyone has
> >provided.
> >-Sean
> >
> >'87 5k TQ wagon]
> >
>
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