DEMO - 1965 Ford Truck Shop Manual - ForelPublishing.com

2-52 GROUP 2-BRAKES
seats squarely on the slave cylinder
body, and tighten the bushing securely.
9. Coat the piston bores in the
slave cylinder body with heavy-duty
brake fluid. Dip the hydraulic cylinder
piston, seals, spring retainer, and
spring in the brake fluid.
10. Install the hydraulic piston in
the slave cylinder bore with the recessed
end (or the large bore of the
piston) toward the push rod bushing.
Carefully position the piston cup
with the recessed end toward the
large spring, spring retainer, and
spring on top of the piston.
On a frame-mounted booster, install
the spring seat in the spring
coils.
11. Position a new copper gasket
on the end plug and screw the plug
in the slave cylinder. Tighten the
end plug securely.
12. Dip the control valve piston
and diaphragm in the heavy-duty
CONTROL TUBE
CONTROL VALVE BODY
AIR INLET TUBE
AND COVER
SNAP RING
SPRING
SEAL
brake fluid. Position the control
valve spring on the diaphragm with
the small end of the spring over the
piston boss.
13. Position the control valve
body over the spring, align the scribe
marks, install the valve body on the
slave cylinder body and secure with
4 attaching bolts and lock washers.
Tighten the bolts securely.
14. Position a new gasket on the
control valve body, position the
valve body cover over the gasket
and secure the cover with 4 bolts
and lock washers. Tighten the bolts
securely.
15. Position the collar over the
threaded end of the push rod. Position
the spring retainer in the spring
as shown in the insert in Fig. 29. Insert
the push rod and collar in the
coils of the spring and through the
retainer. Position the diaphragm
over the threaded end of the push
rod and secure it with the push rod
RUBBER GASKET-
CONTROL VALVE CYLINDER
STOP WASHER
GASKET •
DIAPHRAGM
nut. Tighten the nut securely. After
the nut is tightened coat the threads
of the push rod with shellac to prevent
leakage. Coat the push rod with
heavy-duty type brake fluid.
16. Place the return spring over
the push rod bushing.
17. Place the rear body on top of
the diaphragm with the scriber mark
on the rear body in alignment with
that on the front body. Compress
the return spring, and install and
tighten the clamp, making certain
the diaphragm bead is properly positioned
between the 2 halves of
the body.
18. Install the by-pass tube.
BENDIX (HYDROVAC)
BOOSTER PISTON TYPE
Since the 6%-inch and 9Vi-inch
diameter piston-type boosters are
similar in design, the disassembly and
assembly procedures are the same
CONTROL VALVE PISTON
SPRING
PISTON CUPS
BLEEDER SCREW
END
PLATE
STOP WASHER
SEAL CUP
SEAL RETAINER
SPACER
RETAINER WASHER
SNAP RING
PUSH ROD
LEATHER SEAL
BOOSTER BODY
SEAL
CONTROL TUBE
HOOK BOLT
BOOSTER
PISTON
FIG. 30-Piston Type 6%-lnch Booster-Disassembled
H1244-A