[DeTomaso] brake master cyl still bad?

[Ian Hannington]

It seems to be really hard to get all the air out of the Pantera brake
system.  I had the same problem after rebuilding mine.  I finally bought a
vacuum bleeder and that did the trick.  

Good luck,
Ian

-----Original Message-----
From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
Behalf Of pantdino at aol.com
Sent: Sunday, April 18, 2010 3:53 AM
To: detomaso at realbig.com
Subject: [DeTomaso] brake master cyl still bad?


So after rebuilding all my calipers and switching back to DOT 4 fluid, I
found the brake pedal would just go all the way to the floor with only mild
resistance, while making a swooshing or mechanical wheezing sound.  
I took the master cyl to the local Napa store but we were unable to identify
which new one would replace it, so I sent it out for rebuilding.

Brought it home, bled all the lines, and the brakes are doing exactly the
same thing-- pedal behaves in same way (engine not running).. No change in
fluid levels in the reservoir, no leaks.  There was no fluid at the pushrod
end of the m/c when I took it off before.

AFAIK there are 1.0 possibilities-- the master cyl main seals are letting
the fluid pass from one chamber to the other inside.
Which means the "rebuild" job wasn't done at all or was done poorly.

Any other ideas?

Jim



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