TR2/3/3A TR3A front brake cailper leaking

[RonR]

Folks,

The seal between the two halves of the Girling calipers is leaking. This is the type of caliper with the two-piece retainers for the pads. The seal is no longer availble even though Moss shows it as an availalbe O-ring. The seal is more oval and flat in cross-section rather than round like an O-ring. Any suggestions how I might use some sort of brake-fluid-resistant sealant to stop the leaks?

Thanks.
Ron

 

[Andrew Mace]

You might try calling The Roadster Factory.

 

[Got_All_4]

Never heard or that. Brakes are very important. when in dought change them.

Last year I lost one of those seals rebuilding my front calipers. I just used an O ring out of one of my assortments and it worked fine.

 

[TR3driver]

Did you ask TRF about the seal? I've heard they have them, although they are not listed in the catalogs or included in the standard rebuild kit.

I've also got a long-ago post saved that claims a Beck-Arnley kit 071-1051 includes the seals.

We're talking potentially 1000 psi under panic stop situations, no way would I rely on sealer to "fix" a leaking seal at those pressures, even on a car with dual circuit brakes.

However, in a pinch, I might measure the old seal and see if MMC had something that would fit. They carry square and "double seal" O-rings in various sizes and materials. ISTR EPDM is the right material for brake fluid, but you should double-check that.

 

[RonR]

Thanks everyone. i will call TRF tomorrow.

Randall, who is MMC?

Ron

 

[Tr3aguy]

I think he is referring to MMC

 

[TR3driver]

Yup, that's them.
https://www.mcmaster.com/#o-rings/=e81a87

 

[sp53]

I bought these kits at the local store a couple of years ago, they are Australian.