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Re: Brake fluid questions

Subject: Re: Brake fluid questions
From: Brian Rauchfuss - PCD <brauchfu@pcocd2.intel.com>
Date: Fri, 25 Feb 2000 17:08:44
> I have access to a rather nice pressurized brake bleeding system that
> seems ideal for filling the Europa brake.  However, the unit is filled
> with Shell Fluid 4 brake fluid the specs on the fluid container state
> that the project is suitable for aviation and non-aviation applications
> utilizing synthetic rubber.  In reading the Europa manual is clearly
> states in bold print "use only automotive brake fluid DOT3 or DOT4.  My
> question is two fold.  Why only automotive brake fluid and will the Shell
> Fluid 4 suffice?  
> 
> Can anyone out there shed some light on this one.  Thanks in advance.


It is common in aviation (or at least it used to be) to use natural rubber
seals in brake systems.  Unfortunately, automotive brake fluid will attack
natural rubber, and so it is important to use the right fluid.  The Europa
brake system uses synthetic rubber and automotive brake fluid, so your
Shell Fluid 4 should be ok.  It should be easy to check, though: the container
should mention that it meets DOT4 or DOT3.

Brian


> Erich Trombley
> A028
> Tucson, AZ


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