RE: DOT 3/4/5

From: Wayne Harris (papercu@hotmail.com)
Date: Fri May 05 2006 - 16:07:11 PDT


>DOT3 and 4 will absorb water from the vent over time and >needs to be flushed to remove this.

But that is only if the vehicle is not driven on a regular basis and that is the main reason the miltary switched over to the DOT-5 back before we became busy in all corners of the world.
The vent will still allow water in the system and because the DOT-5 will not absorb water, it will settle to the low points in the system and stay there rusting out the steel piping. Wayne

----------------------------------------
> To:
mil-veh@mil-veh.org
> Date: Fri, 5 May 2006 13:23:45 -0400
> From: rmgill@mindspring.com
> Subject: [MV] DOT 3/4/5
>
> At 9:23 AM -0400 5/5/06, Marty Galyean wrote:
> >
> >Alright, you guys got me wanting to get it
> >right. The verbiage at the link below claims
> >that while DOT3 and DOT4 are hydrophilic, DOT5
> >is *not* hydrophilic because it is "silicon
> >based". Is this true? I recall DOT5 is
> >silicon(e?) based but don't know what them means
> >with regards to water absorption.
>
> It means that DOT5 will not absorb water at all.
> Water in the system will sit in low spots and
> stay as fluid. DOT 5 is liked by racers because
> it has very goo heat characteristics AND is very
> unlikely to absorb water in the system through
> the breather. DOT3 and 4 will absorb water from
> the vent over time and needs to be flushed to
> remove this.
>
> There is a DOT 5.1 that is compatible with 3 and
> 4, but has more characteristics like 5. It cannot
> be mixed with 5. This is really for racers who
> want the best performance possible out of their
> brake systems.
> --
> --
> Ryan Gill rmgill@SPAMmindspring.com

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