Regal V6-173 2.8L (1988)
Fig. 6 Delco-Moraine single diaphragm booster
5. Slowly release pressure on booster assembly, then remove rear housing assembly, power piston and diaphragm assembly and diaphragm spring.
WARNING:Care must be taken when separating booster housing not to allow sudden release of spring tension, as damage or personal injury
may result.
6. Remove power piston bearing from rear housing.
7. Remove master cylinder piston rod and reaction retainer from power piston.
8. Pry out filter using suitable pointed tool.
9. Grasp power piston at outer edges of diaphragm and support plate, then separate power piston by rapping pedal pushrod against work surface.
10. Clean components as outlined in General Service and replace as needed.
NOTE:Power piston and pushrod assembly should not be disassembled. If replacement is required, these components are serviced as an assembly.
Assembly
1. Lubricate inner lip of diaphragm and fit diaphragm into support plate.
2. Place power piston on work surface with pedal pushrod facing up, then mount diaphragm and support plate assembly over piston.
3. Install new diaphragm retainer, then seat retainer and diaphragm assembly using driver J-28458 or equivalent and suitable hammer.
