Guest snag point Posted August 30, 2007 Share Posted August 30, 2007 I just put Toyota 4x4 front disk on my 72 z. They are remans and fully loaded. Have the bigger master also. Worked great to start with, now today they wil not fully release and overheat like hell. Took me a hour to drive home 5 miles. Stopped to let them cool. The pedal is all the way to the top, no give. I wonder if my brake proportion valve is not working. Any help? Snag point Quote Link to comment Share on other sites More sharing options...
WizardBlack Posted August 30, 2007 Share Posted August 30, 2007 The rod sticking out of your brake booster needs to be adjusted back a little bit to let the MC retract all the way when you are off the brakes. What I have seen explained on here is that it doesn't pull back far enough to allow the fluid to release back into the reservoirs (when necessary) and therefore the fluid starts to heat up and expand and has nowhere to do, so they start to clamp your brakes down harder and harder until you get locked completely. You need to have a little bit of play or slack to ensure it resets fully when you get off the pedal. (I take no credit for this description; gentlemen in another thread threw out this explanation. If you want to check it for sure, search under "reaction disk") Hope that helps ya, Mark Quote Link to comment Share on other sites More sharing options...
Guest snag point Posted August 30, 2007 Share Posted August 30, 2007 Thanks, That seems logical. I did shorten it this evening after things cooled down. but when i pressed on the brakes they ran back up to the top again. Quote Link to comment Share on other sites More sharing options...
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