I got the rebuilt servos/boosters via UPS today. They look pretty good, but
externally my old ones look better. I am confused (a normal state), when I
removed
the old boosters I unhooked the brake lines that go from the M/C to the servos
and
then unhooked the vacuum line that goes to the manifold from he black drums.
There
was of course a nice clear fluid that has and is leaking out of the brake lines
and
the drums have the somewhat brackish fluid leaking our of the vacuum fitting.
My
question is how did the fluid get in the black drum and the vacuum line? Does
it
pass from the M/C through the brake lines into the servo and then into the black
drum. Is there suppose to be any fluid in the black drum or full of air (like
me I
am told). I have no experience with power or boosted brakes and am very lost.
What is really confusing me is the boosters that came off look brand new next to
the rebuilt ones, this is not to say the rebuilt ones are bad they look pretty
good
as well.
THANKS!
MIKE R
xyzabcde@earthlink.net wrote:
> Hi again,
>
> The way the brake fluid gets into the brake booster is from a leaking master
> cylinder. The servos may have nothing wrong with them, but from my experience
> with MGC servos, they probably do. The reddish brown color is red from rust,
> combined with black particles of dissolved rubber seals. You definitely need
>a
> new master cylinder and you need to flush the brake lines. While you're at
>it,
> you should check the rear brake cylinders because that's where most of the
>rust
> goes. Sorry.
>
> If you need new servos, it's a good call to replace them instead of rebuilding
> them. I've never rebuilt servos, but I've heard that it's a nightmare and
>they
> rarely last more than three months. The slick solution is to replace them
>with
> remote brake servos from a Volvo P1800 ES Sports Wagon. These cars are just
>as
> rare as MGC's, but the servos last a lot longer.
>
> Be sure to use DOT4 brake fluid, preferably Catrol, because DOT3 will dissolve
> the rubber in the brake system, which might have been your original problem.
>
> Good luck,
> Denise
>
> Mike Razor wrote:
> >
> > Pulled the brake boosters (servos) off the C last night and
> > brake fluid came out of the big black vacuum drums, it came
> > out of the connection where the vacuum line on each drum goes
> > from the manifold to the black drum. I am no brake expert,
> > but I don't think there is suppose to be any fluid in that
> > drum. Of course the reason I pulled the boosters is that the
> > brakes don't work very well.
> > The fluid that came out of the vacuum connection at the drum
> > did have that nice clear look of brake fluid, it had a reddish
> > brown color, some what akin to bourbon in a glass. Except, I
> > like to see bourbon in a glass, not my brake systems.
> > Any comments or suggestions welcomed.
> > I have ordered two new brake boosters (ouch) and they are
> > expensive. Even the rebuild kits are high as a cats back.
> > THANKS!
> > MIKE R
> > 52 MGTD
> > 59 MGA
> > 69 MGC
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