[TR] TR3 Caliper seal

[Randall]

> 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  

-------------- next part --------------
A non-text attachment was scrubbed...
Name: Fig 2 Brake Caliper reduced.jpg
Type: image/jpeg
Size: 45454 bytes
Desc: not available
URL: <http://autox.team.net/pipermail/triumphs/attachments/20170522/565f7200/attachment.jpg>