Gary,
I did virtually the same thing 5 years ago and no leak to date. I got
my O-ring from TRF and don't know the type of rubber, but it has held up
so I don't think the silicone brake fluid is the culprit.
Jim Davis
Fortson, GA
CF38690UO
CF37325U
Gary & Priscilla Klein wrote:
>
> Fellow Scions,
>
> I was putting the finishing touches on the restoration yesterday, like I
> was almost done, when I noticed a small puddle under the left front.
> Under bonnet investigation uncovered that the PDWA was leaking. As part
> of the restoration, I'd replace all brake lines, overhauled the master
> cylinder and all four corners as well as rebuilt the PDWA before
> refilling the entire system with DOT5 fluid this past June.
>
> To rebuild the PDWA, I'd located a source EP O-Rings and used them on
> the valve's shuttle. The leak was coming up through the electrical
> switch, and relatively fast too. I removed the switch body and inserted
> a thin wire to check the position of the shuttle, thinking that I could
> at least reposition it to stop the flow while I cursed, drank a beer,
> and decided what to do. To my surprise, the shuttle moved very easily
> back and forth, something did not do before this and no position really
> stopped it. I inserted a similiarly threaded bolt and it's stopped for
> now at least.
>
> I know what I got to do and I don't relish the though of doing it.
> Removal is such a mess.
>
> This device is so simple, too. Any ideas of what may have happened? I
> figured that silicone would have no effect on the EP O-Rings.
>
> Words of encouragement appreciated,
>
> Gary
> '75 TR6 Undergoing Remanufacture
> Was Almost Finished
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