Steve, just replace the o-rings. You might check the archieves
for "PDWA O-Rings".
It was discussed back in September 1999 and Gary Klein
posted this:
>This evening, I called up PSP and was helped by their chemist, Bill,
>who is also a sports car enthusiast, although he likes Porsche's.
>Anyway, I relayed to him about my recent experience with DOT5 and
>O-Rings and asked him if Ethylene Propylene (EP) O-Rings were the proper
>material for DOT5. Well, Bill cross-checked at least 5 different
>manuals and the unanimous endorcement of all was that this is a good
>application. (FWIW, there is another material, Aflas, which meets or
>exceeds EP in most catagories but at about twice the price, why bother.)
>
>The best we can determine about my situation is that my local supplier
>provided me with the wrong grade O-Rings. I won't know for sure until I
>disassemble my PDWA. If the O-Rings are disintegrating then he said
>that I probably got Nitrile instead of EP. He also suggested a "burr"
>in the shuttle bore but I kepy the original O-Rings and neither of them
>is marked in any way. During cleaning, I was overly cautious, using
>Simply Green and a pipe cleaner to clean out the bores, so I don't
>suspect that I introduced any burrs.
>
>PSP would have been offered a small quantity of EP O-Rings for free,
>however, they didn't have any of the size I need in stock. They did
>refer me to a supplier, AP&G, who agreed to sell me a small quantity.
>They had 140,000 in stock so there was no problem there.
>
>Now AP&G has a minimum order and at less than $.25 each, I decided to
>order 50 and offer the leftovers to members of the list for only my cost
>and postage. Now, before anyone gets excited, there's 2 things to
>know. First, I'd recomment you disassemble your PDWA, carefully remove
>the old O-Rings and measure their size. The one's I ordered will fit my
>PDWA and are Series 000, Size -010. This spec is for an O-Ring with a
>Cross-Section (width) 0.070" +or- 0.003" and an Inner Diameter range
>from Minimum of .234", Mean of 0.239" and a Maximum of 0.244. For my
>application there cannot be any other size as the next series, 100, is
>too thick, 0.103" and thediameter sizes -009 and -011 are too small too
>large diameters to fit. The excellent article on the VTR Website lists
>a different size O-Ring I believe. Perhaps this is the earlier variety
>PDWA? My car is a '75.
>
>The second thing is that I don't have them yet and they will be sent via
>UPS Ground so I'll probably have them next Monday. Additionally, until
>I see the credit card invoice, I won't know how much the shipping costs
>in order to pro-rate it, but I expect that a $1 will cover everything
>for a pair of them.
>
>Email me directly if you have interest and I'll reply after receipt with
>my address and a confirmation of the price.
>
>Gary Klein, <gklein@toad.net>
>'75 TR6 Undergoing Remanufacture
>Close to Done!
PSP Inc has a web site at http://www.pspglobal.com/frameset.html
with some interesting info.
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