Rear Disc E-brake I have made a discovery!!!!!!

[amalventano at sc.rr.com (Allyn)]

> I have a theory that I would like to get some discussion on ....

mmm, theory...

> E-brakes...
> anyone have any input on this?

the pistons are designed to auto-rotate clockwise, which will
auto-compensate for brake pad wear by picking up the slack in the e-brake
mechanism. this takes several brake cycles to accomplish, even for the
smallest auto-adjustment. if you go from new pads/new rotor to used
pads/used rotor, it will take a LONG TIME for the system to fix this on its
own (unless you turn the piston ccw during the swap). it can also take a
while for the ebrake to work after swapping to new stuff, if the piston was
screwed all the way in (possibly against its stop, causing the self-adjust
to not work at all, as its basically been 'tightened' and cant turn ccw on
its own).

data point: i did rear brakes/rotors last month on the rieger. it took 2
days of daily driving for the ebrake to work again. it did work after the
initial test drive, but it was very weak (lever all the way up).

hth
Al