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[TR] brake pressure switch O-rings

Subject: [TR] brake pressure switch O-rings
From: tr3driver at ca.rr.com (Randall)
Date: Tue, 8 May 2012 18:29:16 -0700
References: <3cc70.4e1ce2aa.3cd99b52@aol.com> <828D57CD69AC4C6B9A24D9B419F81B30@Alan> <003301cd2cc4$d913d460$8b3b7d20$@rr.com> <6C3BFC0F07334AC7A638A54844E228F8@Alan>
Viton is not recommended for use with conventional brake fluid.  One report
I found said it swelled by 56% when exposed to "Girling Crimson" for 2
weeks.  Obviously unacceptable.

EPDM is the right stuff, even if MMC doesn't mention all the uses for it.  
http://www.columbiaerd.com/epdm_orings.php

Here's the same chart for Viton
http://www.columbiaerd.com/fluorocarbon_orings.php

-- Randall 

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