I'll check this with some of my technical staff. I've never heard of this.
JVV
----- Original Message -----
From: "Randall Young" <ryoung@navcomtech.com>
To: <Triumphs@autox.team.net>
Sent: Monday, October 13, 2003 2:01 PM
Subject: RE: Leaky Brake Master
> > 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.
> <snip>
> > The proper rubber seals do not swell when in
> > contact with brake fluid.
>
> Jerry, I don't mean this as a criticism either, but I disagree. Brake
fluid
> deliberately has a small amount of 'seal sweller' added to it, which does
> cause a controlled amount of swelling, primarily to compensate for normal
> shrinkage over time but also for a small amount of wear. One of the
> criticisms of DOT 5 silicone brake fluid is that early formulations did
not
> have the seal sweller additive, causing the seals to leak prematurely.
>
> Now whether the small amount of swelling is enough to stop the MC
reservoir
> leak as Jim suggests, I have no idea. I had the same problem on my Stag,
> but it stopped after I 'faced' the reservoir lightly by rubbing it on
> sandpaper on a flat surface. Could be that the O-rings were swelling at
the
> same time and that was the real reason it didn't leak, I just don't know.
>
> Randall
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