I would concur that it is the servo, and not a hydraulic problem. But I have
no experience with the vacuum boosters, myself.
on 10/4/01 2:33 PM, Bob Holton at bholton@golden.net wrote:
> Greetings to the List,
>
> I've recently finished installing a new master cylinder, with a rebuild on
> the in line servo. My problem is upon braking, the peddle is nicely firm
> as the car starts to slow, then I hear a short whoosh sound down in the
> foot well like its coming through the peddle box, the peddle drops about
> 1/4" and the brakes grab almost full. They don't lock up, but I can see
> the nose of the car quickly drop with the braking process.
>
> I've bled the system (3) times, once from empty after installation, and
> twice since this new event has occurred. No air is showing during the two
> later bleeds. The fluid level has not lowered at all once filled during
> and after bleed(s).
>
> The event lessens when the car is up to running temp., but doesn't complete
> stop doing it. One strange thing though, if I engage the parking brake the
> peddle does not drop when depressed (engine running).
>
> My instinct tells me the servo may not be working correctly, but I'm still
> learning and I'm not confident of my diagnosis.
>
> Hopefully a few listers can lead me in a direction for correcting this
> problem.
>
> Thanks in advance,
>
> Bob Holton
> 80 B LE
>
> bh
>
> "A closed mouth gathers no feet" Anon.
>
--
Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the primer red one with chrome wires
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