Chevrolet 1988 Light Duty Truck Repair Manual page 324

5-10 BRAKES
1. B o o t
2. S ile n c e r
3. V a c u u m c h e c k Valve
4. G r o m m e t
5. F ro n t H o u s in g Seal
6. P o w e r P isto n B ea rin g
7. Rear H o u s in g
8. F ro n t H o u s in g
9. R eturn S p ring
10. P is ton Rod (Gaged)
11. R e a ctio n R e tain er
12. F ilte r
13. D ia p h ra g m R e ta in e r
14. D ia g hrag m
15. D ia p h ra g m S u p p o rt
16. P ower P iston and
Pu sh ro d A s s e m b ly
19. P u shrod
25. R e a ctio n B o d y
R eta iner
-►+ Install or C on n ect (F ig u re 20)
Tools Required:
J 23456 Power Brake Booster Disassembly
and Reassembly Tool
J 28458 Power Piston Seal Protector
J 22647 Pushrod Height Gage
Diaphragm (14) into the diaphragm support (15).
• Lubricate the inside d iam e te r of the d ia ­
phragm lip with a thin layer of silicone grease.
2 Diaphragm and diaphragm support onto the power
.
piston and pushrod assembly.
New diaphragm retainer (13) (figure 22).
• Seat the retainer using J 28458.
Filter (12), reaction retainer (11) and piston rod (10).
Reaction body retainer (25).
Figure 21 — Unlocking and Locking Booster
Figure 20 — Single Diaphragm Vacuum Booster Components
6 6
. Power piston bearing ( ) into the rear housing.
• Lubricate the inside and outside of the bearing
with silicone grease.
7. Power piston group into the rear housing (7).
8
. Return spring (9).
9. Front housing to the rear housing.
• Align the marks made during disassembly.
• Use J 23456 to apply force in a clockwise di­
rection to lock the front and rear housings.
• Stake the housing at two tabs 180 degrees
apart (figure 23).
— Do not stake a tab that has previously
been staked.
• Assem bly can be aided by connecting a vac­
uum source to the booster.
10. Grom m et (4) and vacuum check valve (3).
Figure 2 2 — Installing the Diaphragm Retainer
F-05821