parking brake mechanism stuck
nick at beol.net
Sat Nov 22 18:24:00 PST 2008
I don't think you will have any luck trying to "unstuck" from the out side.
You will have to take apart, clean and lube. Hopefully someone will post
I did add a grease fitting to my calipers, they will freeze up again. I
drilled through the actuating mechanism, right down through the middle of
the circle of the return spring. This opened a path to the actuating
"capsule". Then tapped it for a grease fitting.
----- Original Message -----
From: "Kenneth Keith" <auditude at gmail.com>
To: "200q20V mailing list" <200q20v at audifans.com>
Sent: Saturday, November 22, 2008 8:34 PM
Subject: parking brake mechanism stuck
> So I'm working on all kinds of different things on this stone gray
> I'll keep the threads separate. The parking brake barely engages way at
> top of the lever travel, so I get underneath thinking I can just tighten
> adjustment at the Y connection and find that the driver side caliper
> brake is stuck in the fully applied position, but there's actually no
> braking going on. The passenger side seems to not be locked in the fully
> applied position, but I didn't see if it was frozen.
> I took the driver side rear caliper from my wrecked pearl 200q20v parts
> stash, which I planned to use with a 280mm rear brake setup on my eS2
> project, but that parking brake seems to be frozen in the non-applied
> position. I can force it back and forth, mimicking the parking brake
> cable's action with a pair of channel locks, but basically the return
> doesn't seem to be able to overcome the mechanical resistance to release
> on its own.
> I looked at some stuff online to see what the rebuild kits were comprised
> of, and it's just seals and boots; nothing really for the parking brake
> section. I'm wondering how I can resurrect these calipers, parking
> brake-wise, so that they function as intended. Seeing what's involved in
> rebuild, I'll end up rebuilding these, but I'm wondering if the parking
> brake mechanism can be freed on these un-rebuilt calipers (particularly
> one on the car without having to bleed it tonight), or if that can only be
> fixed while doing a full rebuild, then what needs to be done in addition
> the cleaning and seal/boot change?
> Can I just spray Liquid Wrench on the outside and keep working the action,
> or is there something inside I need to do to have functional parking
> Also, for those of you that work on the rear calipers, what tool do you
> to unscrew the piston and where can I get it. I just checked
> samstagsales.com, toolsource.com and zelenda.com and didn't see what I see
> in the Bentley. Everything has pegs, but the piston surface has two
> V-shaped areas rather than peg holes, so it seems like the correct tool
> would have the matching shape.
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