I don't want to sound flip on this subject, but I sure like the single
braking system on my Mk1 Spit. It makes repairs very simple and no
problematic balance mechanism to recalibrate.
If I could just keep doors on it.........
Joe Curry
Dennis F. Kimberlin wrote:
>
> Andrew Mace wrote:
> >
> > On Fri, 1 May 1998, Andrew Dixon wrote:
> >
> > > On the topic of the PDWA, I firmly believe one should go through the
> > > centering technique whichever method one uses. It's purpose is to shift
> > > braking power from a leak in the front or rear.
> >
> > Well, no, not really. The Pressure Differential Warning Actuator (Warning
> > being the keyword here) only serves to indicate a problem in the system.
> > If there is any "fail-safe" at all in the braking system relative to
> > shifting braking power from a leak, that would be in the dual master
> > cylinder (I think that is what the "tipping valve" does.)
> >
> > > When you bleed the brakes
> > > you create a leak and I've found any method causes the PDWA to shift.
> >
> > Again, you don't create a leak when the PDWA shifts. All you do is
> > activate the warning light circuit by means of a mechanical shift of bits
> > within the PDWA. Perfectly normal brakes can be experienced with the PDWA
> > "uncentered." And it is quite possible, although not always easy, to
> > bleed brakes successfully without disturbing the PDWA.
> >
> > I'll grant you that sometimes it is as hard or harder to recenter the PDWA
> > than it is to get it "uncentered" during bleeding. And I'll also grant you
> > that when the PDWA itself DOES start to leak, you've got a whole new set
> > of problems!
> >
> > --Andy
> >
> > * * * * * * * * * * * * * * * * * * * * * * *
> > * Andrew Mace, President and *
> > * 10/Herald/Vitesse (Sports 6) Consultant *
> > * Vintage Triumph Register *
> > * amace@unix2.nysed.gov *
> > * * * * * * * * * * * * * * * * * * * * * * *
> I agree with Andy. Same issue on my SPIT; brakes are great after a
> complete rebuild, but could never get the !@#$%PDWA to recenter. The
> bleeding went without a hitch on each cornor.
> One good thing, I guess....got a pretty red light glowing when we run.
> I'm told there is a manual method to recenter the thing, i.e. remove the
> end cap nuts, but haven't screwed the courage up to do that yet.
> Anyone ever do it that way?
>
> Dennis
> 75 SPIT
> Omaha, NE
--
"If you can't excel with talent, triumph with effort."
-- Dave Weinbaum in National Enquirer
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