[Rear Disc E-brake I have made a discovery!!!!!!]

[losinit at usa.net (Cathy Boyko)]

The piston can be rotated to compensate for different pad/rotor thicknesses.
There should be a dimple/slot etc on its face so you can do this, thankfully
mine was a nice slot, and it screws in (righty tighty) to open it up for fat
pads/rotors, and presumably the opposite for thinner ones, but it's supposed
to self adjust in that direction isn't it?
Mine had the opposite problem, the rotor wouldn't spin because the piston was
too far extended, so I had to deal with it before the wheel went back on
obviously. This did impact the range of motion of the ebrake lever on the
caliper too, and once it was backed off, there was more movement on the lever
since the caliper could actually move. 

BTW, did I mention CINCY'S COMING?!!!!(sorry couldn't contain myself for a
moment there...)WOO HOO!!!!
Cathy



"Leach, Michael" <michael.leach@lmco.com> wrote:
> I have a theory that I would like to get some discussion on ....hopefully
> other people have dealt with the same issue.  I spent a week trying
> everything I could think of to get my E-brakes to work.  I tried three "NEW
> rebuilt" calipers and they all acted the same way.  The e-brake lever ON
THE
> CALIPER not the hand lever would go all the way to the stopper where the
> return spring mounts and nothing would happen.  Since the lever was hitting
> the stop it was not the cables.  I then measured my Rotor and it was ~.375
> inches with the minimum being .315 inches so that was fine and my Pads had
> plenty of life left on them.  But when I was switching calipers I noticed
> that the piston was pretty far extended out of the caliper............so I
> took the next leap and concluded that maybe the combination of thinner
rotor
> and used pads made the caliper too extended to actuate the e-brake...even
> though they were all individually within spec.  I finished switching pads
> Sunday morning right before I went to my first Autocross(that will get its
> own e-mail....what a blast)....to try to complete this story I now have at
> least minimal e-brake usage...I have yet to completely adjust the e-brake
> *too busy on Sunday* so I hope I can get it to REALLY stop the car before I
> take it back to the garage for the inspection sticker.
> 
> Anyway it seems that maybe the calipers are not broken when we think they
> are they just do not work that well unless you have a thick rotor and
> pads....I do not think they should work this way and maybe it is a
> by-product of the rebuild process
> 
> anyone have any input on this?
> 
> thanks for reading
> 
> I have left some of the history of this attached 
> 
> and for Patrick
> when I was talking about the lever I was talking about the lever on the
> caliper itself...the one that the cable attaches to.  That lever was
hitting
> the stop. 
> 
> 
> >now micheal, your e-brake handle is not supposed to climb up all the way
up
> >(loose) it should only click 2-4 clicks MAX before locking the rear wheels
> >as per bentley. if your arm reaches the rear stop bumper, tighten them
nuts
> >up front some more because your cables are still loose.
> >
> >BTW I bbought a new pair at autozone some time back one never did come
> >on...got one fron scrap yard.. it works...lol go figure.
> >
> >ATS - Patrick Bureau - txrocco@sbcglobal.net
> >
> >
> =>-----Original Message-----
> =>From: scirocco-l-bounces@scirocco.org
> =>[mailto:scirocco-l-bounces@scirocco.org]On Behalf Of Leach, Michael
> =>Sent: Friday, May 16, 2003 5:31 AM
> =>To: 'Cathy Boyko'; scirocco-l@scirocco.org
> =>Subject: RE: [I need more Rear Disc E-brake help!!!! and a VENT]...moreq
> =>uestions
> =>
> =>
> =>well this is still driving me nuts.......believe me it is not the
> =>cables...I
> =>have adjusted the crap out of those things......the big picture is that I
> =>will pull the e-brake until the e-brake lever on the caliper hits the
stop
> =>(where the spring bolt is ) and the rotor will still turn.....my pads are
> =>used but have adequate pad left on them and the rotor is ~.375 inches and
> =>the Bentley says the minimum is .315 so I am good there too...the piston
> =>itself does not look over-extended so what is the deal?...The guy at the
> =>parts store is obviously very unsure that the calipers are
> =>bad....and I cant
> =>really blame him but I can not imagine what the issue is here?
> =>
> =>It is very funny ...I do not have Cathy's curse of the Silver Headache
but
> =>instead I have a curse which makes every repair of my car take at
> =>least two
> =>weeks....while I look at the thing in my driveway on jack stands
> =>and pull my
> =>hair out.
> =>
> =>Michael Leach
> =>MH-60R Integration and Test
> =>Lockheed Martin Federal Systems
> =>Owego, NY 13827
> =>607-751-7542
> =>FAX 751-6198
> =>michael.leach@lmco.com <mailto:michael.leach@lmco.com>
> 
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