[s-cars] Brake Fluid Equalizer

[Max Hoepli]

Cables can be greased where the hand brake cable joins caliber, had someone
go up and down with hand brake while I squeeze grease up the hand brake
cable.

Max


----- Original Message ----- 
From: "Paul Heneghan" <paul at heneghan.co.uk>
To: <s-car-list at audifans.com>
Cc: "'Max Hoepli'" <mhoepli at vif.com>
Sent: 19, June 2007 06:07
Subject: RE: [s-cars] Brake Fluid Equalizer


> Rear brakes failing - very common on Audis.  Happened on all four of mine.
>
> A number of things:
>
> Proportioning valves seize up from rust and also from not being used
enough
> (car would need to be regularly loaded to capacity and emptied).  I did
> manage to free up one of mine by spraying it with penetrating fluid and
> exercising it vigorously.
>
> Hand brake cables go rusty and seize up.  This in turn causes the parking
> brake mechanism inside the rear callipers to seize up (although they can
> seize up on their own as well).
>
> Seals on sliding pins on rear callipers fail leading to water ingress,
rust
> and seizure (although this can happen even with the seals intact).  This
can
> be diagnosed by clear signs of one surface of the disk not being used.
>
> Pads rust themselves to carriers - this prevents them moving freely -
again,
> extreme cases can lead to the calliper not auto centring properly.
>
> Have a look at: http://www.eveshamsquash.co.uk/audi/parkingbrake.html
>
> A bit out of date, but still mostly true.
>
> Paul
>
> -----Original Message-----
> Message: 7
> Date: Mon, 18 Jun 2007 17:04:00 -0400
> From: "Max Hoepli" <mhoepli at vif.com>
> Subject: [s-cars] Brake Fluid Equalizer
> >
> > The rotors in the back were rough, rusty on the inner surfaces. only the
> outer surfaces were touched by disc pads.
>