At 10:27 AM 11/15/01 , Greg Rowe wrote:
>After reading the excellent article on the VTR site and the info
>our very own Donald Locker has posted on the Yahoo Groups, I realize
>that it is likely that the seals on the internal piston have failed.
>I dismantled the switch and these o-rings appeared to be whole, so I
>just tried cleaning everything up and reassembling, but it still
>leaks. I'm having some trouble sourcing replacement o-rings of the
>right size and material locally after having been to a couple of
>hardware and plumbing stores. I'm considering alternatives and I'm
>wondering if anyone has anything to add:
The bore of the cylinder gets all pitted. I have three in this condition.
Repair seems to be impractical.
>First alternative - simply plug the opening for the electrical switch
>with a bolt or plumbing plug. While this will defeat the PDWA, I
>don't consider it a particularly useful device anyway since by the
>time it trips, you're going to know that somethings wrong by pedal
>feel anyway. Problem is that the opening appears to be 5/8 inch with
>fine threads and I can't find a plug or bolt to fit! Since I would
>be in effect combining the front and rear systems, I would also be
>losing the benefits of the dual master cylinder.
Yes! This is a good idea. But leave the internal piston in place
to preserve the dual-circuit characteristic. About 10 years ago,
I simply plugged mine with epoxy, and it hasn't leaked a drop since.
Even if the epoxy were to fail, it couldn't leak any worse
then it used to, since the internal piston is really what
resists the fluid pressure. Certainly a real plug would
be a bit more elegant than epoxy, but I have no idea
where to find one, either.
Doug Braun
'72 Spit
/// spitfires@autox.team.net mailing list
/// or try http://www.team.net/cgi-bin/majorcool
|