| Re: [GMCnet] update on master cylinder replace [message #197947] |
Sat, 09 February 2013 12:00  |
KB
Messages: 1262
Registered: September 2009
Karma:
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Senior Member |
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Jim Hupy wrote:
> By far the worst way to bleed them is to gravity bleed
> them, followed quite closely by pumping the brake pedal and releasing the
> bleeders, and third by using a "mity vac" type vacuum pump bleeder on the
> bleeder screws. By far the most efficient method of bleeding the system, is
> a power bleeder.
I was just reading in the "Brake Handbook" by Fred Puhn
that the author didn't recommend a vacuum bleeder. Apparently the
cup seals (on the rear wheel cylinders) can let air in since you're
pulling instead of pushing the fluid and the cups don't seal well
in that direction. (Maybe not a problem with disc calipers
which use o-rings.)
all I know on the topic.
Karen
1973 23'
1975 26'
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Karen
1975 26'
San Jose, CA
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