[200q20v] Rear Caliper sticking?

Phil Rose pjrose at frontiernet.net
Wed Oct 18 00:05:19 EDT 2000

Good job, Kneale. That's the first detailed description of the ebrake
mechanism that I've read. I can *almost* visualize it, but wish you had
some pictures to illiustrate. Nevertheless your bottomline conclusion does
make sense; except isn't it true that you're describing a mode of caliper
failure (piston/cylinder corrosion) that is independent of the e-brake?
That is, it will occur under normal pedal application, right?

But if I've got a sticking rear brake that I am able to free-upwhenever I
manually push back the lever back to its stop, my problem must lie
elsewhere (brake-cable sticking or perhaps loss of that internal grease?)


At 10:33 PM -0400 10/17/00, Kneale Brownson wrote:
>Content-Type: text/plain; charset=us-ascii; format=flowed;
>I got one of the sticking rear calipers off my 200q20v that I replaced a
>couple of weeks ago stripped down this afternoon to see what's what in
>there.  The emergency brake lever turns a rod that has an offset hole
>machined into it.  A small "peanut" about an inch long and maybe a
>quarter-inch in thickness with equal bullnose ends rides in the machined
>hole and pushes on the threaded rod onto which the piston is screwed.
>Because the hole is machined offset, when the lever  moves with the cable,
>the peanut rises up a little bit and that pushes the piston against the
>rotor.  There's a spring, located by an internal circlip,

*  Phil & Judy Rose           Rochester, NY  *
*        mailto:pjrose at frontiernet.net       *


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