I'd like to stop an assumption that might be promoted by this response and
it's not intended as a criticism of Jim personally. That is not my style and
not proper for our list either. I suspect that Jim is repeating what he has
heard from someone else. The proper rubber seals do not swell when in
contact with brake fluid. Think about that, if they did so would all of the
seals in the cylinders. It is simply not so. Put them in gasoline or some
other fluid maybe they will swell.
My business is the molding of rubber parts for various applications and
specifications are written with their interaction with fluids taken into
consideration. In the case of rubber seals for brake applications the parts
are molded from materials compounded to resist swell in brake fluids.
If you have seals that are swelling in brake fluids then get your seals from
a better supplier cause you're on the way to a disaster.
JVV
----- Original Message -----
From: "Jim Muller" <jimmuller@pop.mail.rcn.net>
To: <Triumphs@autox.team.net>
Sent: Monday, October 13, 2003 12:43 PM
Subject: Re: Leaky Brake Master
> On 12 Oct 2003 at 20:56, rjoles wrote:
> > I'm having a weird problem with my GT6. The brake master is leaking
between
> > the reservoir and the master cylinder casting.
>
> I went through that with a new MC for mine. I don't recall with
> certainty what I did about it! I believe I think I remember that I
> took the rubber o-ring out of the old one because the new one didn't
> seem big enough. But then again, I might be misssrememembering it.
>
> Note that "they" say the brake fluif is supposed to make the various
> rubber parts expand, so that if it leaks when first installed it may
> not still leak a week or two later, supposedly. Of course, by then
> the paint has already been stripped off of the bulkhead. It might
> depend too on what kind of break fluif you are using.
>
> I wish you hadn't brought this up, because now that I've hinted that
> my problem hasn't recurred, it probably will.
>
>
> --
> Jim Muller
> jimmuller@pop.rcn.com
> '80 Spitfire, '70 GT6+
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