Oop's - at first I thought you might have stepped
on a slug.

Falling pedal can be the master cylinder,  but
since you mentioned having recent brake work,
if they replaced the rear shoes,  they may have
not pre-adjusted them after installation.

The symptom you describe can happen if the rear
shoes are'nt adjusted out to the drum and then
backed out slightly after first installed.

Look there first, and if the shoes are adjusted
right, they will self -adjust properly . If the
sinking pedal still persists,  then it's the
master cylinder most likely . I recently replaced
my 23 year old MC with sinking pedal.

Robert

1982 Westy

--- Kim Brennan <kimbrennan@MAC.COM> wrote:

> So, in driving the GoldBrick (86 Syncro
> Passenger Vanagon) recently,
> I've encountered a new issue. When I brake, if
> I'm lightly braking,
> the pedal slowly sinks to the floor. I don't
> notice it sinking if I
> suddenly hit the brakes, or it I pump the
> brakes.
>
> No leaks at the wheels. Fluid level doesn't
> seem to be falling. So
> I'm thinking master cylinder. Any other
> diagnostics to look at to
> confirm (or refute) my diagnostic? Clutch seems
> fine.
>
> Note, the brakes were worked on not too
> distantly in the past, shop
> put on Big Brake kit, and I asked them to
> change the fluid then too...
>

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