Replaced the Brake Master and Now......

[signature65]

Quick question....I just replaced my master cylinder with a new 19mm part fom our host. Now my brakes feel rock hard.

Bled them correctly....no spongieness at all. Just rock hard, almost too hard. Seems to require more foot pressure than before to get similar braking power.

Anyone else experience this? It could be that my previous master was so far gone that I really do not know how they are supposed to feel.

One last thing......if I stab at the brakes I can get the fronts to lock up.....but if I progressivly add pressure only my left rear locks up.....whats up?

[signature65]

anyone?

[kodioneill]

if you have over 90,000 miles your rubber lines are plugged. replace front and rear rubber brake lines. they swell up and plug themselves off.

[rick-l]

I have never heard anyone complain their brake pedal was too firm.

Swollen hoses will impeded the release of the brakes not the high pressure application.

[kodioneill]

the front brakes on my sc would lock up with no rear brake action. the plugged hoses most definitely impeded the application. most definitely. the pedal release was fine.

do a search on "brake hoses plugged" loads of threads.

[rick-l]

Originally Posted by kodioneill

the plugged hoses most definitely impeded the application. most definitely. the pedal release was fine.

Seems like it should be the other way around. The 3000 psi fluid will apply the brakes but the decaying release (low) pressure is impeded.

[ossiblue]

My 73.5T has a very hard pedal, maybe even "rock hard" with no sponginess. I, too, can lock up the fronts with a hard stab on the brakes, but I have never locked up the rears though I have never braked as you described. I imagine that a hard, progressive pressure which causes the car to nose-down and remove weight from the back wheels could cause the backs to lock up. No expert here, just my experience with a similar car.

[Steve@Rennsport]

Originally Posted by rick-l

Seems like it should be the other way around. The 3000 psi fluid will apply the brakes but the decaying release (low) pressure is impeded.

Thats correct,....

A lockup problem may indicate a bad brake line, sticking caliper pistons, or a cornerweight issue.