> I came up to a light and luckily no one was in front of me...it was brake
> fade personified. The pedal went half way to the floor and finally all the
> way to the floor, I did get it home pumping the brakes. Help me diagnose
> this...I have a full reservoir of fluid. Is it the brake master cylinder?
There is a spring inside the MC that can break and cause this symptom. Last
time I looked, no one listed this spring for the TR3A, however Moss P/N
582-065 will work. Given the relative costs, and how easy and simple the
TR3A MC is, I would certainly suggest rebuilding it yourself. Get the
rebuild kit and replace all the parts that come in it as well, while you
have it apart.
> If it is should I buy a replacement, what should I know about replacing it
> and I assume I have to bleed the master cylinder, I know how to
> do the brake
> cylinders but not he master.
If you fill the MC with fluif on the bench before installing it, you
shouldn't need to bleed it very much after installation. It's been my
experience that I can usually get the air out by pumping up the brakes and
holding the pedal down for 10-15 seconds, then releasing it. I repeat this
3 or 4 times until I get good pedal on the first stroke.
However if you do find you need to bleed the MC, start by using the nut on
the outlet as a bleed valve, ie loosen the nut, have someone depress and
hold the pedal, then tighten the nut. Repeat until no more bubbles show up.
Then you may have to bleed through to the slave cylinders.
Randall
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