rear caliper 4000CS
shawn.manny at gmail.com
Mon Oct 17 10:03:51 EDT 2005
Sounds like a seized up parking brake assembly. You have to thread the rear
pistons in as you compress them.
On 10/17/05, Kneale Brownson <kneale at coslink.net> wrote:
> Take a look at http://www.20v.org/brakere.htm
> At 06:53 AM 10/17/2005 -0700, Eric Henning wrote:
> >My son and I are working on his future 86 4000CS.
> >Right rear disc was very rusty and appears not to be
> >acted on by the brakes. Took the caliper apart
> >(removed piston only , not circlip). I am not familar
> >with these types of calipers and see that there is the
> >piston, then the part that is threaded on the big rod.
> > This part screws out to gain access to the circlip.
> >Is the part that rides on this thread supposed to fit
> >inside the piston? Cleaned everything and put in new
> >gaskets but cant seem to get the piston back in far
> >enough to fit the pads over the disc. I've rebuilt
> >many calipers before but never saw this type. What is
> >the purpose of this part that threads over the big
> >"bolt"? The other three discs are nice and clean
> >indicating that the pads are working, but this right
> >rear was completely encrusted in rust telling me no
> >pressure was applied to the pads. What causes this?
> >and should that part that spins on the thread fit
> >inside the piston?
> >86 4000CS quattro
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