Power Brakes - Tandem Booster Service, Components
86-215
DEC., 1985
Subject: TANDEM DIAPHRAGM POWER BRAKE BOOSTER SERVICE
Model and Year:
1986 ALL MODELS SO EQUIPPED
TO: ALL CHEVROLET DEALERS
The tandem power brake booster assembly used on 1986 models contains several new style components. See illustration.
Please reference illustration when performing tandem diaphragm power brake booster repairs until receipt of the 1986 chassis service manual.
NOTE: NEW STYLE AND OLD STYLE POWER PISTON COMPONENTS ARE INTERCHANGEABLE.
Tandem power brake booster assembly:
1. BOOT
2. SILENCER
3. VACUUM CHECK VALVE
4. GROMMET
5. VACUUM SWITCH (SOME MODELS)
6. GROMMET
7. FRONT HOUSING SEAL
8. PRIMARY PISTON BEARING
9. REAR HOUSING
10. FRONT HOUSING
11. RETURN SPRING
12. PISTON ROD (GAUGED)
13. REACTION RETAINER
14. POWER HEAD SILENCER
15. DIAPHRAGM RETAINER
16. PRIMARY DIAPHRAGM
17. PRIMARY SUPPORT PLATE
18. SECONDARY PISTON BEARING
19. HOUSING DIVIDER
20. SECONDARY DIAPHRAGM
21. SECONDARY SUPPORT PLATE
22. REACTION DISC
23. REACTION PISTON
24. REACTION BODY RETAINER
25. REACTION BODY
26. AIR VALVE SPRING
27. REACTION BUMPER
28. RETAINING RING
29. FILTER
30. RETAINER
31. O-RING
32. AIR VALVE PUSH ROD ASSEMBLY
33. POWER PISTON