Power Brake Assist: Service and Repair

Fig. 1 Exploded View Of Single Diaphragm & Vacuum Multiplier Type Booster:

Refer to SYSTEM I.D./POWER BOOSTER APPLICATION CHART for booster models that can be overhauled.
The tandem diaphragm units internal parts are non-serviceable. If there are bad internal components, the whole unit must be replaced as an assembly.
Only single diaphragm and some vacuum multiplier type boosters can be overhauled. To overhaul single diaphragm and vacuum multiplier type models, refer to Fig. 1. All items marked with oil can must be greased upon assembly.