caliper piston


'RayMan
07-14-2005, 05:35 PM
Hey ya'll
I'm changing the pads on a friends '01 miata and the rear passenger caliper piston will not colapse completely. Any suggestions?

MazdaMech
07-23-2005, 07:32 AM
Miata rear brake systems require that you release the piston assembly from it's detent compression (due to worn pads) by taking a proper sized hex head/allen key (metric), inserting it into the bak of the caliper assembly, and turning it COUNTER-CLOCKWISE to it's fully open position. At this point, compress the caliper piston with a c-clamp to its original position (flush with the housing assembly. When this is accomplished, and you have installed the new pads, use the Hex key/allen wrench to screw the piston assembly CLOCKWISE until it makes contact and stops (against the new pads/piston wont move further). At this point, use the Hex key to move out the screw 1 to 1.5 turns COUNTER-CLOCKWISE! Now the rear brakes are properly adjusted. Bleed the system, and adjust the emergency brake :)

rottiear
09-16-2005, 06:51 PM
Thanks for the info below. My dad is working on my 93 mx-5 and was wondering about the set screw. Now how do you adjust the emergency brake? The car came with no manual, etc. I am trying to locate a shop manual so we can work on it.
Thanks


Miata rear brake systems require that you release the piston assembly from it's detent compression (due to worn pads) by taking a proper sized hex head/allen key (metric), inserting it into the bak of the caliper assembly, and turning it COUNTER-CLOCKWISE to it's fully open position. At this point, compress the caliper piston with a c-clamp to its original position (flush with the housing assembly. When this is accomplished, and you have installed the new pads, use the Hex key/allen wrench to screw the piston assembly CLOCKWISE until it makes contact and stops (against the new pads/piston wont move further). At this point, use the Hex key to move out the screw 1 to 1.5 turns COUNTER-CLOCKWISE! Now the rear brakes are properly adjusted. Bleed the system, and adjust the emergency brake :)

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