Hi.

Thanks for ideas. I believe a fault at vacuum
assist/booster would give a hard pedal with greatly
reduced brake effectivness. i.e. one would lose
mechanical advantage. I did have hoses apart in engine
bay, so will double check regardless. Booster does
seem to be doing its' job though.....

Likely I'll be taking this puppy to a brake shop to
get them to bleed it.

I may try a gravity bleed to see how that goes first
but for sure will double check shoe adjustment and
vacuum connections.

Cheers,

Neil.

--- Wil Haslup <whaslup@GMAIL.COM> wrote:

> neil wrote:
> > Hi all.
> >
> > Ok. So I finished working on my rear brakes.
>
> snip...
>
> > But.....
> >
> > Cold in the morning engine off; brake pedal is
> easy to
> > push to floor. Pumping doesnt' seem to bring up
> pedal
> > height. After starting, and a couple pumps, pedal
> > height is ok. It stays ok as I drive and brakes
> work
> > ok.  If it sits for a long time (hours?) pedal
> goes to
> > floor yada yada same sad story.
> >
> > Shoes are adjusted. There are no leaks
>
> snip...
>
> Hmmm, if the problem isn't in the
> brakes/lines/cylinders...my memory is
> that I had a vacuum leak at or near the deceleration
> valve and that
> there is a vacuum brake assist on my '80.  Others
> might know where this
> connection is as I had this trouble years ago.
>
> ...not sure if a failure here would give you the
> symptom you mention
> though...likely that it would just make braking
> harder, requiring more
> effort rather than letting the pedal go to the
> floor.
>
> I'm more likely to think that you still have air in
> the system some where.
>
>
> --
>
> Wil
>

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