One of my "oooohhhh" moments was when I first had a failed master cylinder. I spent all sorts of time checking everything else. When I finally made it back to the master cylinder for replacement, I found black stuff floating in the reservoir. I believe it was the seals degrading and flaking off into the fluid.
I hadn't really looked at the fluid. Brake fluid is quite clear. It's a pretty good telltale sign that the master cylinder is bad if it's black or murky.
Carl
On 9/8/2012 7:29 PM, ajrnemt wrote:
it does, but becomes sponge like, and pretty much goes to the floor..
I'm assuming failed master cylinder-- but thought it odd that I have a firm pedal when the engine is off-- only to go to mush when it's running.
..and if I have to pull the master cylinder-- how do I get the reservior off the top of it??
...
--- In diesel_mercedes@yahoogroups.com, Stan George <ssgkag@...> wrote:
>
> On 9/8/2012 3:34 PM, ajrnemt wrote:
> > k, I've noticed the pedal has gone soft (after starting the engine)
> > it's like a rock, and correct "height" with the engine off..
>
>
> Put your foot on the brake pedal and start the car (assuming there is no
> vacuum in the system). You should feel the brake pedal sink if the
> vacuum booster is operating properly.
>
> --
> Stan George Portland <<
>
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