[TR] TR3 Caliper seal

[Geo Hahn]

Right - I probably should have said:  ...there is no 'cap' *that needs to
be removed *to get at the pistons...

Geo

On Mon, May 22, 2017 at 4:48 PM, Randall <TR3driver at ca.rr.com> wrote:

> > But that said - there is no 'cap' to be removed to get at the pistons -
>
> I could be wrong, but I think he has the earlier TR3/A style calipers, with
> the cross-over tube.  They have a big plug in one side, which Girling said
> to never remove.  Under that plug, there is another plate and then there is
> a round flat gasket between the plate and the caliper body.
>
> We went through this last year, but I don't recall the resolution and can't
> find the thread.  There was a place in the UK that sells those gaskets for
> other sizes of Girling calipers, but I don't know if anyone found a size to
> fit the TR3 version.  The SPC lists the gasket (aka "ring, sealing end
> plug") as P/N 504829.
>
> Someone suggested using an O-ring, but I'm dubious about that solution.  To
> seal high pressures, O-rings have to go into a groove that supports most of
> the ring; and there is no groove for them in the caliper.  And the pressure
> there can go over 1000 psi (during a panic stop).
>
> -- Randall
>
>
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