[Fot] O-ring for TR3a "B" style calipers

[Duncan Charlton]

You might try your local bearing house.  I once needed something to to fix a pushrod tube leak in a vintage motorcycle and they came up with quad rings, which I previously didn’t know existed.  They had all sorts of resources and the three or four such establishments I’ve been to had employees who were eager to help me find a solution — nothing like your typical franchise auto parts store these days.

You might also check online bearing supply catalogs for SKF, etc.

Duncan

> On Jan 17, 2019, at 4:30 PM, Jason Sukey via Fot <fot at autox.team.net> wrote:
> 
> Does anyone have experience with the square o-ring needed for TR3A split calipers ("B" style with bolt down pad retainers)?
> 
> The seal recess in these measures 9/16" diameter, compared to the later 16P calipers that have a 1/2" diameter seal recess.
> 
> The o-rings I just received from Moss (583-821) measure 1/2", same as the seals for the 16P calipers.  Moss is at least looking into it, but they don't have any more on the shelf to check.
> 
> Does anyone know of a source for these?
> 
> Jason
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