Master Cylinder Push Rod
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2004 Mazda B4000, 2004 Mazda B3000, 2004 Mazda B2300, 2003 Mazda B4000, and 2003 Mazda B3000. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Do not apply the brake pedal with the master cylinder removed from the booster.
NOTE:
Push rod has an adjustment screw to maintain correct distance between booster push rod and master cylinder piston. If push rod is adjusted too long, it prevents master cylinder piston from completely releasing hydraulic pressure, causing brakes to drag. If push rod is adjusted too short, it causes excessive pedal travel and an undesirable clunk in booster area.
Remove master cylinder to gain access to push rod. With engine running and vacuum line connected to booster, measure distance "A". See Fig 1 . Adjust push rod screw by turning it until distance "A" is .98-.99" (24.89-25.27 mm).