Brake Booster Push Rod

Install adjusting gauge on master cylinder with master cylinder gasket in place. Lower adjusting gauge pin until pin slightly touches master cylinder piston. See Fig 1 (STEP No. 1). Turn adjusting gauge upside-down and install on power brake unit.
Measure clearance between brake booster push rod and adjusting gauge pin head. See Fig 1 (STEP No. 2). Measured clearance should be zero. If clearance is not zero, adjust brake booster push rod length until push rod lightly touches adjusting gauge pin head.

Fig 1: Adjusting Master Cylinder Push Rod Step No. 1

Fig 2: Adjusting Master Cylinder Push Rod Step No. 2