David,
I'm gong to look at that.  These are FLAPS wheel cylinders, so I am
suspicious of their quality.  I talked to the automotive instructors
at the community college I work at.  They've seen a lot but were
puzzled by these symptoms, except for the possibility that the
cylinder was defective.  They mentioned the spring(s) inside.  I'm
going to pull out the old leaking one and take it apart and see
what's inside.

Edward

At 09:17 AM 3/28/2009, David Milo wrote:
>Now that I'm thinking about this, I'm fairly certain that the last
>pair of rear wheel cylinders I installed had coil springs inside to
>keep the pistons out; the rubber boots kept the pistons from falling
>out completely.
>
>Does you old cylinder have the springs inside?
>
>Dave
>
>On Sat, Mar 28, 2009 at 8:46 AM, Edward Maglott
><<mailto:emaglott@buncombe.main.nc.us>emaglott@buncombe.main.nc.us> wrote:
>I can add some additional info to my saga now.  (I have the
>previously mentioned videos posted
>at:
><http://www.youtube.com/user/emaglott>http://www.youtube.com/user/emaglott
>watch the piston on the
>right side.)
>I hooked up my pressure bleeder and put about 10psi on the
>system.  The piston stayed out against the shoe.  when I open the
>bleeder valve, the piston moves back into the cylinder away from the
>shoe. Close the bleeder, it moves back out.  I was still suspicious
>of the boot so I pulled it back, sort of inside out on the
>piston.  Then the piston stayed out when I opened the bleeder valve
>on the cylinder.  Then I took off the pressure bleeder and it still
>stayed out, even when I opened the bleeder valve.  When I put the
>boot back in place, it went back to its old habit of pulling back
>into the cylinder.  So I'm pretty sure it has something to do with
>the dust boot (ha ha).  I'm gong to take off the cylinder and put my
>old one back on (the one that wasn't leaking yet) and see if I get my
>nice firm pedal back.
>
>Edward
>
>
>
>
><Snip>
>