Chevrolet 70 1969 Series, Shop Manual

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BRAKES 5B-65
S P R IN G
R E T A IN E R , | . S E A L
O - R IN G
P IS T O N
S E A L
H O U S IN G
L O C K G R O O V E
P IS T O N
S N A P R IN G
H EX NUT
S Q U A R E N U T
B A C K -U P |
R IN G S L B E A R IN G W A S H E R j
RUBBER S E A L
fvWWI
— B A C K -U P R IN G (Positioned
in p iston g ro o v e )
i
P O W E R
C A P j
S P R IN G
\
i *
A
X ~. i h
N A IL
(Positioned over
c a p lip a n d in
h o u s in g lock groove)
E -R IN G
R ELEASE
BO LT
IN N E R |
W A S H E R
J
O U T ER
W A S H E R
O - R IN G
T-5878
Figure 44— Super “Fail-Safe” Components
19. Remove flat washer from release bolt.
20. Remove release bolt from cap.
21. Remove O-ring from release bolt.
22. Remove second flat washer from release
bolt.
IM P O R T A N T : D O N O T remove breather as­
sembly from cap unless inspection indicates dam­
age. It is necessary to cut the nail to remove the
assembly.
A S S E M B L Y
Before assembly, clean and inspect all parts.
Lubricate with recommended grease. D O N O T lu­
bricate cap in the area of the breather assembly.
D O N O T use solvent on back-up or O-rings. Use
hot soapy water and wipe clean.
It is necessary to use a sealer on the foot set­
screw and cover the head of it with plastic tape
until the sealer sets.
I M P O R T A N T : Replace sealing compound over
cap lock ring to seal unit from outside contamin­
ation.
If breather assembly has been removed from
cap, perform first four steps of following proce­
dure. Otherwise, start assembly procedure with
Step 5. Refer to figure 46.
1. Insert nail through opening in seal.
2. Insert assembly through opening in cap.
3. Insert spring over nail.
4. Force retainer over flared end of nail.
5. Install outer flat washer and O-ring on re­
lease bolt.
Figure 45— Power Spring Compressing Fixture Figure 46— Breather Assembly
CHEVROLET SERIES 70 -80 H EAVY DUTY TRUCK SH O P M A N U A L