Bob -
The PBR servo unit is a diaphram servo... so you won't
get any leakage past the gland seal like the original
Healey/Girling Servo.
You may have also bled the system in the wrong
order... if you do a four wheel bleed, you should
bleed in this order: Left hand Rear, Right Hand Rear,
Left Front, Right Hand Front. If you do a full bleed
in this order, you will get rid of all the bubbles
guaranteed.
Regards,
Alan
'53 BN1 '64 BJ8
--- Bob Spidell <bspidell@pacbell.net> wrote:
> John,
>
>
> Don't rule out a problem in the MC ... there is a
> little valve with
> a small rubber seal that seals the circuit to the
> reservoir when you apply
> the brakes. If that seal's shot you'll get exactly
> those symptoms. Have
> someone apply the brakes while you watch the level
> in the reservoir ...
> if the fluid level rises when you apply the brakes
> then this is your problem.
>
> If you're losing fluid from the reservoir, however,
> it's probably getting past
> the "gland seal" in the booster (assuming the PBR
> servo is similar to the
> stock Girling).
>
>
> bs
> ********************************************
> Bob Spidell San Jose, CA
> bspidell@pacbell.net
> '67 Austin-Healey 3000 '56 Austin-Healey
> 100M
> ********************************************
>
>
>
> > After several years of driving my 65 BJ8 without a
> > brake servo, I finally got around to rebuilding
> > (replacing all seals in) my PBR unit. The main
> > cylinder looked excellent without any noticeable
> > scratches or scoring, hence I did not have it
> > resleeved.
> > After reinstalling the unit, I bled it, then
> proceeded
> > to bleed all four wheels. When I step on the
> brake
> > pedal it goes right to the floor with no
> resistance
> > whatsoever. However, if I pump it rapidly with
> about
> > a half a dozen strokes, it builds up pressure to
> what
> > I would consider about the right amount of
> "pedal".
> > It has a somewhat cushioned feel, as I would
> expect
> > with a servo. (previously a very firm pedal
> without
> > the servo). If I hold it there, it doesn't seem to
> > fade as long as I don't completely release the
> pedal.
> > But as soon as I let it return completely to it's
> > fully released position, I lose ALL pressure, and
> it
> > now goes right to the floor again! The master
> cylinder
> > was working fine before introducing the servo????
> > Any suggstons would be greatly appreciated.
> > Thanks, in advance,
> > John Lakie
> > 65 BJ8
> > Ontario, Canada
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