- Joined
- Jul 27, 2008
- Location
- Dallas, TX
BRAKES 101:
on a NEW master cylinder you can push the seals hard enough at the bottom
of the "stroke" to slightly deform them - as they come back past the compensating
port in the master cylinder the seal gets a small scar in it..leads to premature failure
in an OLD master cylinder there is an accumulation of seal bits / rust - corrosion and
a *stuff ridge* of grot that builds up at the end of the *normal stroke* - if you "bottom
out the pedal you push the seals thru this "wall of crap" and they get cut / scarred /
sliced / ripped ....leading to failure...yearly flushing of the fluid (as in a COMPLETE
FLUID CHANGE OUT) will help stop the crud / corrosion ring of crud and gives you
the best chance at long life in the cylinder...
often unlearned / unskilled mechanics will "force the pistons back" whilst replacing
pads..this runs ALL of the accumulated mung in the system BACKWARDS THRU
the master cylinder leading to premature failure (if you have an ABS system onboard
you run the risk of forcing all the crap into the control valves in the ABS "block" and
effectively destroying THAT high $$$$ piece of gear...
I have yet to have any problems that source...