Listers,
"O" rings are available for the calipers used on the MG Midgets from
the
usual places and I suspect they are the same as used on the Spitfire brakes,
also the Midget Manuels list the torque value at 33.5 to 37 ft lbs. assuming
that the bolts are the same size and thread. They also say that the bolts
should not be reused but replaced. I have reused these bolts but I am
always very careful to torque to specs or just a little under. I believe
the real problem is over tightening and then you have a bolt failure thus
brake system failure. It isn't really that difficult to rebuild the
calipers with compressed air without breaking them in half unless you have a
really rusted piston then it is best to replace the whole unit.
Bob
>From: "T. .R. Dafforn" <td214@cam.ac.uk>
>Reply-To: "T. .R. Dafforn" <td214@cam.ac.uk>
>To: Jeff McNeal <jmcneal@ohms.com>
>CC: Frank Drummond <frandrum@voicenet.com>, spitfires@autox.team.net
>Subject: Re: CALIPERS
>Date: Tue, 28 Aug 2001 11:03:55 +0100
>
>Hi Frank,
>People on the list have done this, but as Jeff said, the O rings arn't sold
>by
>the usual suspects.
>However you can get some from engineering specialists, but matching the
>original
>spec is trickey.
>There is also no torque setting for when you bolt them back together.
>Cheers
>Tim
>Jeff McNeal wrote:
>
> > Frank,
> >
> > It's adviseable NOT to crack them open at all. There is a small o-ring
>washer
> > inside that there is no ready replacement for and disassembling the
>calipers
> > is not something that anyone recommends for any reason, including
>converting
> > to DOT 5. Change out the rubber in the piston chambers, yes, but
>splitting
> > them apart is not necessary.
> >
> > Take care,
> >
> > Jeff McNeal (San Diego)
> >
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