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Originally Posted by Arthur Dalton
.......Well, we are back to your understanding of physics again, are we ????
Fliuds DO NOT COMPRESS ..that is why they use them.....if they compressed , you would have ANY brakes !!!!!!!........
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my dear friend Arthur, I have to say that your above statement is NOT TRUE.
On the contrary, ALL FLUIDS ARE COMPRESSIBLE!!!
Since the brake medium used is fluid, it DOES COMPRESS TOO. However, the brake fluid is off-course made such that this compressibility is minimized.
Quote:
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Originally Posted by Arthur Dalton
....The main reason for fluid change is that brake fluids have a problem that inherently effects the wear and saftey to your brake system. This property
is that the fluid is 'Hygroscopic' . by definition, it absorbs MOISTURE...
..and moisture is the enemy of the internals of the brake system, along with the fact that it will boil at a lower temp than brake fluid not contaminated w/moisture......
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This is one of the reasons for changing the fluid but not the main reason.
Afterall, the brake system is meant to me watertight and to keep moisture out.
The main reason for changing the fluid is because after lots of usage and heating up of the fluid (mostly around the caliper area), the fluid starts to loose its properties that makes it so useful such as compressibility, viscosisty etc.[/QUOTE]
Now, as far as the fluid change goes, just replacing the reservoir fluid will help in a minimal way but you are leaving the majority of the fluid in the lines and caliper area and therefore you are basically waisting your money. Flushing the fluid through the nipples is the best way.
And the mixing of the fluid in the brake system can happen through convection currents which are very minimal and do not circulate all of the brake fluid.
It is not fluid diffusion since such process requires difference in fluid concentrations which is not the case here.
just few comments
thanks.
ACM