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RE: TR4 clutch m/c: failure questions

To: "Triumph" <triumphs@autox.team.net>
Subject: RE: TR4 clutch m/c: failure questions
From: "Randall Young" <Ryoung@navcomtech.com>
Date: Tue, 22 Jul 2003 22:18:50 -0700
> My clutch master cylinder died this morning.  It's been ill, needed to
> be pumped once or twice when the car sat in the sun.  I think the m/c
> was relatively new, within the last 5 years and under 30,000 miles.
>  There's a layer of black goo at the bottom of the reservoir.  I have a
> new m/c on the way to install this weekend.
>
> 1. I've read there were some bad seals a while ago; is the goo probably
> from disintegrated seals?

Could be, especially if you didn't use either Castrol or DOT 5 fluid.  The
original seals would not stand up to the additives in American brake fluid
and would dissolve into black goo in fairly short order.  Glycol-based
fluids (DOT 3 or DOT 4) also absorb moisture and deteriorate over time,
which turns them dark (whether you drive the car or not).

> 2. If the m/c was fairly new, and bad seals rather than 40 years of wear
> are at fault, would it make sense for me to snag a rebuild kit too and
> carry that m/c as a spare?

Just learn to drive without using the clutch ... I drove my Stag home just a
few days ago with no clutch, through SoCA rush-hour traffic.  Didn't leave
me in the best of moods, but I got here !

Randall

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