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Fig. 15: Adjusting Master Cylinder Push Rod BRAKE PEDAL HEIGHT & STOPLIGHT SWITCH 1. Released pedal height is measured from carpet surface, on vertical portion of firewall, to pedal pad center. Disconnect stoplight switch electrical connector. Loosen lock nut on stoplight switch. Rotate switch away 2. Adjust pedal free play. See BRAKE PEDAL FREE PLAY under ADJUSTMENTS. Tighten push rod lock nut. Tighten push rod lock nut to 18-25 ft. lbs. (24-34 N.m). 3. Rotate stoplight switch until it contacts pedal, then rotate an additional 1/2 turn. Tighten stoplight switch lock nut to 10-13 ft. lbs. (14-18 N.m). Reconnect stoplight switch electrical connector. 4. Applied pedal height is measured from angled portion of firewall (without carpet) to pedal pad center. Start engine. Depress brake pedal with a pressure of 132 lbs. (60 kg). 5. Measure applied pedal height. See BRAKE PEDAL HEIGHT SPECIFICATIONS table. If distance is not as specified, check for air in system or worn pads. Repair as necessary. BRAKE PEDAL HEIGHT SPECIFICATIONS BRAKE PEDAL FREE PLAY Application In. (mm) Pedal Released 6.8-7.1 (171-181) Pedal Applied (1)
3.7 (95) (1) Minimum height.
1997 Mazda MX-5 Miata ANTI-LOCK BRAKE SYSTEM 1997 BRAKES Mazda - Anti-Lock
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