Master Cylinder: Installation

ALWAYS check and adjust clearance between power assist servo push rod and master cylinder piston if either unit is replaced or overhauled. See Fig 1. Place Depth Gauge (09737-00010) on master cylinder with sealing gasket installed. Loosen lock knob and let pin of gauge lightly touch piston on master cylinder. Lock pin in place.
Turn depth gauge over and set on power assist servo. Adjustment is correct if push rod just barely touches head of pin on gauge. If not, adjust male portion of push rod with open end wrench while holding female portion of rod with pliers.
This adjustment will give standard operating clearance of .004-.020" (.1-.5 mm) with idle vacuum applied to servo. To install, reverse removal procedures and bleed brake system.

Fig 1: Measuring Clearance Between Master Cylinder& Power Assist Servo Set each end of depth gauge to zero clearance.