Chevrolet 1979 Light Duty Truck, Руководство по ремонту

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BRAKES 5-13
10
38
Figure 2 6 — Booster Inner Com ponents
• C heck that the beads on the secondary dia­
phragm (
20
) are seated evenly around the
com plete circum ference.
16. New d ia p h ra g m re ta in e r (15) and s e a t u sin g
J 28458.
17. S ilencer (14), reaction retainer (13) and piston rod
( 12 ).
• Lubricate the inside and outside diam eters of pri­
mary piston bearing ( 8 ) with silicone grease.
18. Prim ary piston bearing ( 8 ) into the rear housing (9).
19. Power piston group (38) into the rear housing (9).
20. Return spring (11).
• Align the scribe marks on housings (9 and 10).
• Lock the front and rear housings using J 23456 (fig­
ure
2 1
).
• Stake the housing after locking. Stake two
tabs 180 degrees apart (figure 23).
• Do not stake a tab that has been previously
staked.
• Assem bly can be aided by connecting a vac­
uum source to the booster.
• Lubricate the inside and outside diam eters of the
grom m et (4) and front housing seal (7) with a thin
layer of silicone grease.
21. G rom m et (4) and vacuum check valve (3).
22. Front housing seal (7).
23. S ilencer (2) and boot ( 1 ).
• Gage the piston rod (figure 24).
12. P is to n R od
(G aged)
13. R e a c tio n
R e ta in e r
14. P o w e r H ead
S ile n c e r
15. D ia p h ra g m
R e ta in e r
16. P rim a ry D ia p h ra g m
17. P rim a ry S u p p o rt P la te
18. S e c o n d a ry P is to n B e a rin g
19. H o u s in g D iv id e r
20. S e c o n d a ry D ia p h ra g m
21. S e c o n d a ry S u p p o rt P la te
41. P o w e r P is to n A s s e m b ly
F-05893
Figure 2 7 — Pow er Piston Group
Use J 22647. If not w ithin limits, obtain a ser­
vice adjustable piston rod.