Vacuum Brake Booster

Brake Servo:

LEGEND
A. Port
B. Port
C. Valve
D. Port
E. Seal
1. Chamber
2. Chamber
3. Chamber
4. Chamber
5. Mounting Stud
6. Pushrod
7. Plunger
8. Rubber Pad
9. Plastic Diaphragm Hub
10. Plastic Diaphragm Hub
11. Seal
12. Spring