HELLO
WHEN MY MASTER BRAKE CYLINDER FAILED LAST YEAR IDECIDED TOGIVE THE SYSTEM A FLUID RENEWAL.I DID NOT BELIEVE THAT THE CORRECT FLUID HAD TO BE CASTROL LMA AND WENT ON AND POURED THE MORE EXPENSIVE ATE FLUID. NOW I HAVE TO RENEW THE MATER CYLINDER AGAIN.IS WHAT I THOUGHT TO BE BULL TRUE?DID NOT USING THE CASTROLLMA RUIN IT?KNOWLEDGE IS POWER.THANKS

 

Well LMA stands for "Low Moisture Absorption", the brand is not relavent.
As long as you use a low moisture absorption brake fluid you will be fine. You probaly just got a bad master cyclinder.

 

Question is did you use the Dot 4 grade?

 

What year is your Disco?
I have been running Vavoline's synthetic fluid in my truck for over 5 years with great results.

 

IT IS A 98 DISCO AND YES IT IS DOT 4 ATE BRAKE FLUID.PROBLEM IS PEDAL GOES TO THE FLOOR BUT THERE IS NOT ANY MISSING FLUID.SO NO LEAK IS SUSPECTED .I GUESS ITS THE MASTER CYLINDER.I DO SEE BRAKE FLUID IS CLOUDY LIKE WHEN RUBBER IS DISSOLVED.