[ROVERNET - UK] Brake hook-up
gofanu at usachoice.net
Sun Apr 22 05:45:59 BST 2007
Odd that Rover doesn't show how to hook up the pipes, maybe they figure
you can figure it out!
The simple fact is that it's just physics; regardless of how it "was"
or is "supposed to be" -- there's only one thing that works. Any pocket
that is closed at the top will hold air and therefore cannot be bled -
there must be a top exit port.
***This means that fluid has to go in low and come out high.***
So, for a single bleed screw system with two cylinders, the fluid goes
in low, exits high, enters the other side low, and exits high at the
It is expected that all of these cars today have been apart and had many
things changed, DO NOT assume that "how it was" is even close. Fittings
can be very misleading; ports are commonly machined with tools that make
one type of port that is suitable for multiple different fittings, and
these things are not necessarily reversible. Bleed screw ports are the
same thread and sometimes the same bottom configuration as the threaded
hose or tube end ports. One common port is for the round nose long
3/8-24 hose end or male tube/bubble flare nut, but is more often used
with a short 3/8 -24 copper gasket sealed hose, or banjo bolts with the
same copper gaskets, at caliper and other cylinder ports. There are
similar and perhaps more common tapered end/double flare hoses, which
will deform to round end in a round bottom port. . There are inverted
flare pipe ends that use the same male nut as double or bubble flare
fittings. This can confuse the hell out of you, but it can also be used
to advantage when forced to make do - which again leads to mystery the
next time round.
There are in fact a few demented systems which do not follow these rules
- though it's usually a case of the wrong but similar parts fitted, and
they are a PITA to service; if you meet this particular Buddha in the
road, definitely kill it.
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