If you have too much air in the front brake section of master cylinder,
it may be unable to really pump anything. One thing to try is
to pump hard and fast, while an able assistant opens and closes the bleeder
at the right times. Or you can cover its outlet with your finger on the
up-stroke
of the pedal, and remove it on the down-stroke.
Also, is the pedal going all the way up? On my car once, an improperly
installed brake light switch kept the pedal from coming all the way up.
As a result, the "tipping valve" was never tipped, and fluid could never
enter the cylinder from the reservoir. (Actually, in my case, it could
never leave, and the front brakes slowly locked up as I drove down the highway
and the fluid warmed and expanded.)
Doug Braun
'72 Spit
At 03:58 PM 3/19/00 -0800, you wrote:
>Fellow listers,
>
>I've got a problem with the front brakes on my '72 (dual m/c). The brake
>pedal goes to the floor (with effort), I can push it to the floor with my
>hand. The brakes have been bled several times, no bubbles, but not much
>fluid (fluif ?) either. The rear brakes seem to be fine, bleed well, and
>move a lot of fluid. This is a 'new' system using silicon dot 5 fluid, all
>rebuilt wheel cylinders / calipers, new master cylinder (1976 variety, small
>cap))
>
>Is the m/c suspect ? Possible fluid leaking past the seal ? Is there any way
>to test/verify ?
>
>TIA...Ken C
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