Vacuum Boosterframe-Mounted - Diaphragm Type Installation - Ford 1964 F-100 Shop Manual

2-34 G R O U P 2-BRAKES
6. Install the push rod seals, wash-
er and snap rings in the push rod
bushing. Both push rod seals should
be installed with the open end of the
seal facing the slave cylinder body.
Install the lockwasher over the end of
the bushing. Install the bushing seal.
7. M o u n t the slave cylinder body
in a vise. Position the front body
over the end of the slave cylinder,
inserting the transfer bushing with
proper hole in the front body.
8. Thread the push rod bushing
in place. Be sure the front body seats
squarely on the slave cylinder body,
and tighten the bushing securely.
9. Coat the piston bores in the
slace cylinder body with heavy-duty
brake fluid. Dip the hydraulic cylin-
der 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 bush-
ing. Carefully position the piston cup
with the recessed end toward the large
spring, spring retainer and spring on
top of the piston.
O n a frame-mounted booster, in-
stall the spring seat in the spring coils.
11. Position a n e w 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
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 lockwashers.
Tighten the bolts securely.
14. Position a n e w 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. Posi-
tion the spring retainer in the spring
as shown in the insert in Fig. 32. In-
sert 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 i t with the push rod
nut. Tighten the nut securely. After
the nut is tightened coat the threads
of the push rod with shellac to pre-
vent 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 dia-
phragm bead is properly positioned
between the 2 halves of the body.
18. Install the by-pass tube.
INSTALLATION
1. Position the brake booster on
the mounting bracket, and install
the mounting bolts, using new lock-
washers.
2. Connect the hydraulic lines to
the booster. Tighten connections se-
curely.
3. O n a frame-mounted booster,
attach the air intake hose to the con-
trol valve air inlet fitting, and tighten
the clamp securely. If necessary, clean
the air inlet element.
4. Bleed the brake system as out-
lined under "Hydraulic System Bleed-
ing," (Part 2-1).
5. Connect the vacuum hose to the
vacuum check valve (or tube) on the
booster. Tighten the clamps securely.
6. Perform the checks and tests as
outlined on Part 2-1.