I had a similar problem when I replaced my master cylinder earlier this
year (first service I have had to do to the brakes since 1996). The master
cylinder doesn't work so good with air. In addition to the mightyvac there is
a device (I forget the name) that applies a modest amount of air pressure to
the reservoir to push fluid through the system. I didn't have one of those
but I do have an air gun so I carefully applied a short blast of air to the
vent hole in the reservoir cap - taking care to not hold it too tightly to
the cap so that the pressure would be self-limiting - which forced enough
fluid into the master cylinder to get things working again.
Bleeding after that was pretty much textbook.
If you have a pressure regulator set it to 5 PSI. Or 3 PSI.
Dave
In a message dated 9/11/2013 12:30:18 AM Central Daylight Time,
wsb1960tr3a@att.net writes:
> I was told that you
> could hook a Mityvak up to the bleeder and vacuum pump the air out. It
> doesn't
> seem to work. How does one use a Mityvac to bleed brakes? Maybe you have
> to
> hold the pedal down while you are vacuum evacuating the brake line. Does
> anyone have any hints?
> I am going to look for a one man bleeder tomorrow.
> Gotta get this car back on the road while we still have good weather.
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