DEMO - 1965 Ford Truck Shop Manual - ForelPublishing.com

2-46 GROUP 2 - BRAKES
FILTER
RETAINER V
fj
H1336-A
FIG. 18—Removing Diaphragm
shell with a punch or screwdriver
(Fig. 15). Discard the seal.
14. Working from the inside of
the front shell, cut the bead off the
check valve grommet. Remove the
check valve.
FIG. 19—Removing Valve
Retainer
PUSH ROD
FILTER RETAINER
SLOT
H 1337-A
ASSEMBLY
1. Place the rear shell on two wood
blocks as shown in Fig. 20. Press a
new seal, plastic side first, into the
recess on the inside of the shell to a
depth of VA inch.
2. Dip a new check valve grommet
(Fig. 15) in alcohol and install it in
the front shell making sure that the
beveled edge is toward the inside.
Make sure that the grommet is seated.
Dip the shoulder of the check
valve in alcohol and install it in the
grommet. Press check valve into
grommet until the flange contacts
the grommet.
3. Apply silicone grease to the
outer surface of the diaphragm plate
hub and to the bearing and rubber
surfaces of the valve.
4. Insert the valve and rod into
the hub of the diaphragm plate. Push
the rod inward until the retaining
groove is aligned with the slot, and
then slide the retainer into the groove
(Fig. 19).
5. Tuck the filter into place in the
plate hub. Press the filter retainer
onto the hub being careful not to
chip or damage the plastic (Fig. 18).
6. Install the diaphragm on the
diaphragm plate, making sure that
the diaphragm lip is tucked in all
around the recess between the hub
and plate (Fig. 19).
7. Place the rear shell in a vise.
Apply silicone lubricant generously
to the top outer flange of the shell.
Apply silicone grease to the seal in
the rear shell.
8. Carefully guide the valve rod
and diaphragm plate hub through the
seal in the rear shell.
9. Center the large end of the return
spring on the diaphragm plate.
10. Align the index mark on the
front shell with the one on the rear
shell. Place a flat bar on the front
shell and compress the spring until
the tangs on the rear shell contact
the notched sections of the front
shell, and then rotate it clockwise to
lock it in place.
11. Apply lubricant sparingly to
the stem of the hydraulic push rod
keeping it away from the adjusting
screw area. Apply silicoite grease
liberally to the piston area of the
push rod and to the reaction disc.
12. Center the reaction disc on the
push rod piston. Guide the disc and
push rod into the base of the diaphragm
plate, and press the rod inward
until the disc is bottomed (Fig.
21).
1/4 INCH SEAL
FIG. 20-lnstalling Rear Shell
Seal
H1338-B
FRONT SHELL
REACTION DISC
FRONT SEAL
HYDRAULIC PUSH ROD
FIG. 21-Installing Reaction
Disc, Push Rod, and Front Seal
HI 347-A
13. Press a new front seal into
the front shell until it bottoms in the
recess (Fig. 21).
14. Install the plastic dust shield
over the push rod and against the
rear shell (Fig. 15).
15. Position the two mounting
brackets on the rear shell studs, and
install the retaining nuts and lockwashers
(Fig. 15).
BENDIX (HYDROVAC)
BOOSTER DIAPHRAGM-TYPE—
FRAME-MOUNTED
DISASSEMBLY
1. Loosen the check nut (Fig.
22), screw the hydraulic cylinder
from the end plate, and remove the
hydraulic piston cup, hydraulic piston,
and return spring.
2. Mount the end cap in a vise,
loosen the hydraulic cylinder, and
remove the hydraulic cylinder and
seal from the end cap. Remove the
2 snap rings, spring retainer, washer,
spring and check valve (Fig. 22). A
check valve is mounted in the end
cap on the truck equipped with this
booster. Therefore, a check valve is
not used hi the master cylinder.
3. Scribe a line across the 2
halves of the diaphragm chamber
and also across the end plate and
control valve housing.
4. Loosen the hose clamps on
the control tube, and slide the hose
toward the control valve housing.
Loosen the tube nut on the control
valve and turn the tube away from
the diaphragm chamber.
5. Remove the nuts and lockwashers
from the end plate. Separate
the end plate from the power chamber.
Remove the return spring.
6. Remove the snap ring, guide
bearing, tube seal, push rod seal,
and stop washer from the end plate
(Fig. 22).
7. Remove the air inlet tube lock
ring and remove the tube, gasket,