Nissan 47210-22P00 MASTERVACUUM Assembly-Brake

Detach the master cylinder, subsequently, take off vacuum line of the servo unit. Next, you should pull off the lower trim piece of the dash panel and upon you being under the dash, you will have to relieve the pressure on the servo pushrod by withdrawing the clevis pin. Take off the nuts on the servo unit mounting studs, go back to the engine bay or compartment and pull out the unit from the car. Replace vacuum servo unit and mounting nuts of the unit to the bulkhead from inside the car. The next step would be fitting the brake pushrod to the servo unit with the help of a clevis pin then linking the vacuum hose with the servo unit. Last, replace the master cylinder, measure the brake pedal height and free play and set to optimal standard if need be, and the dash panel lower trim.

When the engine is started while holding the pedal fully depressed, a slight downward movement of the pedal should be felt.