<VV> Brake Fluid Tech tip

[Ron]

The article has "...the copper in the brake lines..." so I'm asking, "What 
copper in the brake lines?"
RonH

----- Original Message ----- 
From: "Scott Trunkhill" <strunkhill1 at comcast.net>
To: <virtualvairs at corvair.org>
Sent: Monday, May 24, 2010 2:23 PM
Subject: Re: <VV> Brake Fluid Tech tip


> Here is the link to the entire post.
>
> http://workshop.search-autoparts.com/_Tech-Tip-Testing-Brake-Fluid-With-Your-DMM/blog/209152/31710.html
>
> Note the text from the end.
>
> I played with the DMM method I described, and noticed that voltage 
> readings were not affected by whether or not the engine was running, and 
> what electrical accessories were on.  It was almost as if the fluid and 
> contaminants in it were acting as a voltaic cell, creating voltage 
> potential of it's own.  I won't state that as fact... merely conjecture. 
> But could this be a measure of copper/iron in the fluid?  Could this 
> chemical catalytic process result in such a reading?
>
> I'll leave that up to the scientists and engineers to figure out...
>
>
>
>
> On May 24, 2010, at 1:43 PM, vair140 at aol.com wrote:
>
>> I don't understand why there would me voltage showing.  Where is the 
>> positive voltage coming from thru the brake fluid.
>>
>> Regards,
>>
>> Guy Brandes
>> 65 VAIR 140
>>
>> ps it is so pleasant to see tech stuff and most of the negative stuff 
>> going away.
>>
>> g
>>
>>
>>
>> We all know that brake fluid is hygroscopic, able to draw in moisture 
>> like a
>> sponge.  It is no wonder, then, that the brake fluid in the master 
>> cylinder is
>> often dark, almost black in appearance.  But does that mean it has to be
>> changed?
>>
>> Not always.  And while there are test strips to test the moisture 
>> content, here
>> is a method that works just as well.  Use your DMM (Digital Multimeter) 
>> to test
>> the fluid!  The procedure is easy enough.  Hook up your negative meter 
>> lead to
>> the negative battery post, and then insert your positive meter lead into 
>> the
>> brake fluid while avoiding contact with the reservoir itself.  Any 
>> reading over
>> 0.30 volts is too much, and the fluid should be flushed.  This test is a 
>> result
>> of an SAE paper showing a distinct relationship between moisture content 
>> and the
>> voltage measured.  It is also a great demo to share with your customer 
>> when
>> selling the repair!
>>
>> > >
>> >> I attended a local car show yesterday. It was hosted by a local Auto 
>> >> Parts
>> >> & machine shop. On the wall next to the parts counter, they had a 
>> >> printed
>> >> tech tip. Most of us know that brake fluid is hygroscopic - it 
>> >> attracts
>> >> water,  and it brings it into the fluid solution.
>> >>
>> >> Seth  Emerson
>> >>
>> >> C's the Day! - Corvair, Camaro,  Corvette
>>
>>
>>
>> >>
>>
>> Scott Trunkhill
>> CORSA, Corvair Atlanta, SECC, CORSA SC
>> 66 Corsa, 65 Convertible, 65 Corsa Autocrosser, 63 Greenbrier
>> scott at trunkhill.com
>> ####################################
>>
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>>
>>
>>
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>
> Scott Trunkhill
> CORSA, Corvair Atlanta, SECC, CORSA SC
> 66 Corsa, 65 Convertible, 65 Corsa Autocrosser, 63 Greenbrier
> scott at trunkhill.com
> ####################################
>
> Please visit
> http://corvaircentral.com          http://wtbrt.com
> http://corvair.us                          http://corvair.tv
>
> ####################################
>
>
>
>
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