Parking brake 4000 quattro

[Ben Swann]

I had a hard time reading the page on Phil's site, basically found out what
you suggest.

After bleeding the caliper, for whatever reason, Handbrake operation seems
"lost".  However, when I drove the car for 1/2 mile and operated the brakes
in a sprited fashion - eg. bedding the pads, I rechecked the operation of
the caliper in question.  The handbrake function returned to normal.

Anyway, I wasted much time thinking the calipers were "broken".  After
changing rear pads, cleaning calipers, bleeding or similar service, the
handbrake operation is "lost" until the brakes are operated.  The handbrake
operation will return to normal after driving the car.

Ben
----- Original Message ----- 
From: "Ado Sigal" <a.sigal at bluewin.ch>
To: "Ben Swann" <benswann at comcast.net>
Sent: Friday, October 15, 2004 5:29 PM
Subject: Re: Parking brake 4000 quattro


> Ben Swann wrote:
>
> >I am in process of checking/installing calipers to fix 4000 quattro rear
caliper that is not pushing the piston out when the lever is turned - either
by hand or with the cable.
> >
> >I took a good caliper off a 5000 q - worked fine before taking it off.
After installation and bleeding, the piston doesn't push out anymore.  Now I
have scrounged up several of these, and they seem to have the same problem.
Perhaps something with removing the piston and cleaning and installing good
seal has  made one stop working.
> >
> >What is causing this?  how come the parking brake portion of the caliper
stops working, even though the lever moves freely?  Moving the lever results
in no or barly perceptible movement of the piston.
> >
> >Can this be fixed?
> >
> >Ben
> >_______________________________________________
> >quattro mailing list
> >quattro at audifans.com
> >http://www.audifans.com/mailman/listinfo/quattro
> >
> >
> >
> You'll find the answer on Phil's site:
>  http://www.isham-research.com/quattro/caliper.png
> The trick is not to operate h/brake cam before the calliper is bled and
> pistons adjusted.
>
> Cheers,
>
> Ado
>