Re: Brakes/Ur-Q Rears Update

[johncorbishley <jcorbs@cablemichigan.com>]

Just the pads, seals (rebuild kit) and bleed screws.  Fortunately the piston was
retrievable.  The handbrake mechanism was also seized, but there again a little
fine emery paper seems to have done the job.  The biggest job was getting them
free initially.  I used release/penetrating oil.  Fortunately  the piston are
relieved in the center to allow them to be turned by a large allen key (12mm).
Without that it would have been very difficult to aviod damaging them.  I do not
know whether yours are similar, but the brains trust and Bentley will.  The guide
pins appear to have been the initial problem.  They were covered in gunge and
would hardly move despite the boots all being in good condition (important to
check under ALL seals and boots even if they look fine).  I cleaned them down with
emery and used high temp brake grease to lube them.  I also had the disks skimmed
because they are only 30 months old and hardly worn (the consensus is that I
should have replaced them. Only time will tell).

Completed the final bleeding tonight including the master cylinder and
proportioning valve (thanks to Jim and Michael), and they are better than I
remember, with handbrake back to full functionality.

Living in Northern MI, I have now learned that I should have a good look at my
brakes at the end of each winter.

You will no doubt receive a lot of really good advice from the list as I did.

Good luck.

John Corbs

Jeff Myers wrote:

> John,
> That may be the problem I have as I have been having some trouble with
> the handbrake.  Thanks very much for your input.  BTW, what did you end
> up replacing.
>
> Thanks,
> Jeff
>
> johncorbishley wrote:
> >
> > Jeff:
> >
> > I have just gone through the same issue with my '83 Ur-Q.  Certainly a very
> > different vehicle, but for what it is worth I found that the piston on one
> > side had rusted solid in the caliper in the engaged position.  This had the
> > effect of completely destroying the inner pad on that side, eventually
> > wearing down to the metal, which was when I became aware of the problem.  An
> > early indication however was the loss of the handbrake, which I had
> > attributed to a failed cable.
> >
> > Good luck.
> >
> > John Corbs
> >
> > Jeff Myers wrote:
> >
> > > Listers,
> > > I have a right rear brake grinding on a 93 V8.  It came up suddenly and
> > > seems to only occur at very slow speeds, parking etc.  Braking at higher
> > > speeds there is no grinding.  Can anyone address any solution?  I know
> > > it is about time to replace the brakes all around, so maybe this is the
> > > solution.  However, it arose so suddenly I thought it may be another
> > > problem.  Also, can anyone recommend a source for pads. TIA
> > >
> > > Jeff Myers
> > > 93 V8