I've just had the very problem. ie: master cylinder seems to be knackered. What I did was filled a bottle of dot 4. Removed the brake line from the caliper and put it into the bottle and held it above (2in) the master cyclinder. I then pumped the master cyclinder a few time checking the oil level did not go below the min mark. You should see air bubbles coming from the hose. I then quickly attached the pipe to the caliper and used a brake bleeding kit from halfords. Worked for me. How much have people paid for brake calipers. I've been charge £80 for a ST4 rear with pads.....! |