Brake Booster Push Rod - Except Probe

NOTE: Some boosters use factory adjusted or nonadjustable push rods. Do not attempt to adjust this type of push rod.

Make push rod gauge according to specified dimensions. See Figure , Figure and Figure . Remove master cylinder from power unit (without removing hydraulic lines) and set aside. The master cylinder must be supported to prevent damage to hydraulic lines.
Start engine and place gauge over push rod. Adjust push rod nut to provide light tension of about 5 lbs. (2.3 kg) against gauge. Reinstall master cylinder.
With engine idling and master cylinder reservoir cover removed, observe fluid surface when brake pedal is applied rapidly. Movement of fluid surface in forward reservoir indicates properly adjusted push rod. If fluid surface movement did not occur, push rod is adjusted too long and procedure must be repeated to prevent brake drag.