Buick LeSabre 1965 Service Manual page 568

9 - 4 6 POWER BRAKES
BRAKES
COVER
DIAPHRAGM
CHECK VALVE
RETURN SPRING
PISTON
SECONDARY
CUP
MASTER CYLINDER
PRIMARY CUP
LOCK RING
bears against the outer rim of
the front and rear housings to aid
in assembly. Apply power brake
lubricant liberally to seal in rear
Figure 9-44—Disassembly of Master Cylinder
housing and carefully guide
sleeve end of diaphragm and valve
assembly through seal in rear
housing.
order to p r e v e n t damage to
threads.
Figure 9-45—Installation of Rear
Bearing Seal
5. Install m a s t e r cylinder on
front housing and firmly clamp
assembly by master cylinder in
a vise.
6. Install power piston return
spring and then install rear hous-
ing assembly by using pry bars
to rotate rear cover clockwise
until scribe lines align.
NOTE: When using pry bars,
make certain that nuts are in-
stalled on rear housing studs in
7. Remove master cylinder from
housing.
8. Apply power brake lubricant
sparingly to hydraulic push rod
keeping lubricant away from ad-
justing screw end of rod. Apply
lubricant liberally to piston end
of push rod and to entire surface
of reaction disc and plate disc
on end of push rod. Guide re-
action disc and push rod into
center bore of diaphragm plate.
Assemble plate and seal over end
of push rod (plate side first).
Press seal into front housing until
bottomed in recess of housing.