Steve,
I suspect that your O-Rings on the PDWA piston are shot. The area below
the nylon switch should be dry. New o-rings for the piston are
available but be absolutely certain to obtain Ethylene Propylene (EP).
Last Fall, I purchased a quantity of O-Rings and offered them to list
members but unfortunately, they're all gone. I still get requests from
time to time so I suspect that like me, you can get rid of them in short
order by offering them to fellow list members, too. They're not
expensive, less than $.50 each if I remember. You can order a quantity
($5 minimum plus about $7 postage) from:
American Packing and Gasket Co.
1-800-888-5223
www.apandg.com
The proper part number is E70010
description: 568-010 EPR 70 O-Rings
I've included my earlier post where I indicated the specs for the
O-Rings.
Now I have to admit that I followed Jim Altman's suggestion and
installed an o-ring and bolt in the switch hole and have not replaced my
O-Rings as yet. Sounds like Jim hasn't either as he got a set of
o-rings from me. (Jim, we know where our priorities lie, right?)
Good Luck,
Gary
Severn, MD Digest
'75 TR6
----------
Gary Klein wrote:
>
> Fellow Scions,
>
> Just wanted to state that I still have several sets of EP O-Rings for
> anyone contemplating the rebuild of their later model Pressure
> Differential Warning Actuator (PDWA). The specs on these rings are:
>
> Cross-Section (width) of 0.070" +or- 0.003" and an Inner Diameter
range
> from Minimum of .234", Mean of 0.239" and a Maximum of 0.244. These
> O-Rings differ than those indicated in the VTR website article. I
have
> a later model PDWA which is a bit different as it does not have the
> circlips as shown there.
>
> The part number for these rings, which can be verified from the PSP
> website is:
> Series 000, Size -010.
>
> http://www.pspglobal.com/frameset.html
--------
> A technical question that doubtless many of you can answer with little
> thought: As brake fluid is leaking (slowly) from the nylon brake
hazard
> switch mounted on the pressure equalizer block (or whatever you call
it),
> does this mean that the seals in the pressure equalizer are bad, or
just the
> nylon switch itself? The switch costs little, while the whole
assembly is
> worth many more samolians.
> TIA, Steve Skolnik
> Greenbelt, MD
> 1975 TR6 -- Delft blue and in the body shop at present
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