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[T3] master cylinder conversion


I recently acquired a 1966 Fastback with 73,000 original miles on it.  The
car runs great and looks good. There is no body or floor pan rust, because
the original owner had the car undercoated and the interior looks like a new
car. The only problem I had was a leaking master cylinder.  When I tried to
locate a single circuit master cylinder for a 66 the local part houses said
this was an obsolete part.  So, I went for the 1967 dual circuit master
cylinder to replace my single.

To complete the installation, I inserted a T-fitting in the hose from the
resivor to branch out to the cylinder.  After installation and fighting with
the bleeder valves, I bleed the brakes.  It took a while, but I got good
pressure on the back brakes.  The front brakes are a different story.  I
bleed them but had very little pressure when I released the valve and after
trickling about 1/2 the fluid out of the resivour I assumed the air was out
of the system.  After driving and some strategic planning at the stop light
I determined my brakes were not working properly.  The pedal is spungy and
needs to be pumped a few times to  build pressure.  I then bleed the brakes
again and had the same results.  I am fairly confident the the back brakes
are working properly and my problem is in the front.  Although, I have
little or no pressure, my front brake shoe drag slightly.  It sounds like
they are barely toching the rotor causing an annoying sqeek.

My question is does anyone think I have some air stuck in the front circuit
of the cylinder or maybe I have missed some adjustment when I converted to a
dual circuit cylinder.  I already tried adjusting the push rod, but this
only caused more problems than soulutions.  Any input will be greatly
appreciated.

Thanks,

CS


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