Re: [MV] Contaminated Brake fluid...

From: Ryan Gill (rmgill@mindspring.com)
Date: Wed Jul 03 2002 - 18:48:49 PDT


At 6:24 PM -0700 7/3/02, Nathan Wilkens wrote:
>Hello List!
>I'm going down my list of things to fix on my 1986 M1009, and now I'm down
>to the brakes. Although they work fine (really fine, truth be told), when I
>opened the brake fluid reservoir, all I see is a milky gray fluid.
>Apparently, the last owner mixed brake fluids and now I need to fix it.
>
>1. What is the correct brake fluid for a CUCV? When I was in the Nat.
>Guard, we used a purple brake fluid called BFS (brake fluid silicon). Is
>this the same as DOT 3, 4, or 5?

Depends on the kind of seals you have. If they are natural rubber,
the DOT 3 stuff will make them swell and eventually destroy them. 3
and 4 are compatible, 3/4 aren't compatible with 5.

>2. What about seal damage? The guy at my local NAPA store fed me a
>song-and-dance story about having to replace all master cylinder and brake
>system seals (I don't believe him).

Not a bad call.

>3. What is the best way to replace the brake fluid? I'm imaging I need to
>sponge out all the fluid from the reservoir, and then bleed the system
>(closest wheel from the master cylinder first).

Sponge it out, then flush it with denatured alcohol.

-- 
--
Ryan Gill                 rmgill@mindspring.com
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     1960 Daimler Ferret     1942 Daimler Dingo


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