[urq] Locking brakes

[Johan Hisinger]

Hi,
I had exactly the same problem and the problem was the master cylinder leaking fluid when getting hot, changed the cylinder and all is well.

I think I red somewhere that the problem might also occur if the brake servo is faulty, but I'm not sure about this.

Cheers,
Johan H

Skickat från min Nokia Lumia
________________________________
Från: Patrick Carlier
Skickat: 2.3.2013 08:47
Till: Doug Rath; urq at audifans.com
Ämne: Re: [urq] Locking brakes

I had a similar problem with a 5K , wich is basicly the same braking system
.

Brakes binding after a 10 maybe 15 minutes drive .
Problem was heat releated , fi with the AC on , it occured at lot faster ,
in winter it
was almost gone . With the brakes seized ,  a wet cloth around the master
would release them in a few seconds .
You could even hear the "click" of the master's internals releasing .

Replacing he master cilinder cured my problem , altough the old one didn't
show
any sign of wear or damage .
I've cleaned it , greased it , degreased it .... never been able to fix it .

So unless you're absolutely sure of your MC , I would say that's the culprit
.

Pat




----- Original Message -----
From: "Doug Rath" <drath1 at optushome.com.au>
To: <urq at audifans.com>
Sent: Friday, March 01, 2013 10:26 PM
Subject: [urq] Locking brakes


> Hi guys,
> I have had a persistant problem with the brakes on my WR not releasing
> after a number of aplications.
> Master ok
> Brake hoses ok
> My mechanis tells me that there is a wear spot on the piston from the
> booster which is causing the problem.
> We are making a spacer to fit between the master and the booster so as the
> piston will operate on a diferent area of the piston.
> Has anyone experienced this problem.
> Cheers.
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