Brake break#
Mon, 23 Feb 2009 12:38:39 +0000
Yes, still Firebrox fixingSo we have a pair of 1990s-era Sachs Power Discs on the front wheels
of our work bike. It's a closed hydraulic system and hasn't needed
any attention in the few years we've owned the bike, until recently
one of the lines broke (probably from flexing during some other
maintenance)
We've established that they drink mineral oil (not dot fluid) and that
the usual bleed procedure is to squirt the oil in from the bottom of
the system until it comes out at the top. There is a hole at the
bottom of the caliper through which one is presumably supposed to
inject the oil. It's covered by a short M8x0.75 bolt, which has a
head made of cheese.
Getting bolt off/pipe in/oil in/bolt on again without letting any air
in looks like it is going to be Extreme Faff. Has anyone who
owns/used to own these things got any tips? The ideal would probably
be to replace the bolt with a bleed nippple like the back brakes (Hope
C2) have, but even ebay is provnig not that helpful for sourcing bleed
nipples with that unusal thread pitch.