the top piston is ~19 years old and with ~170k miles on it. the bottom
is factory new, zero miles.
from the right hand end of the piston push-rod to the internal end where
the brake booster rod goes is 47.82mm on the old one and 47.81mm on the
new one. 0.01mm is not a significant difference - likely to be factory
tolerance more than it is wear. even when allowing for a ~10:1 foot
pedal leverage ratio, that's still only 0.1mm pedal travel difference at
bottom line, adjusting the push rod "for differences between old and new
master cylinders" is mistaken. if there are any perceived problems with
pedal travel, it's because of wear in the pedal pivots. end of story.
Naw... You're doin' just fine. It's who you are "attempting" to
I spent many years in manufacturing and regardless of how automated a
process may be, there is always the human variable whether it is at the
front or back end. Ever see an example of when JIT logistics actually
work? Lean manufacturing??? There is always theat pesky human element
that acts like grit on a slippery slope..
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