FORD MUSTANG 1969 Volume One Chassis
Manufacturer: FORD, Model Year: 1969, Model line: MUSTANG, Model: FORD MUSTANG 1969Pages: 413, PDF Size: 75.81 MB
Page 21 of 413
02-02-02
Brake
System
02-02-02
COMPONENT INDEX
DISC BRAKE SHOE AND LINING
Cleaning and Inspection
-
See
Part 2-1
Removal and Installation
DRUM BRAKE
Description
DUAL BRAKE SYSTEM
Description
HYDRAULIC LINES
Removal
and
Installation (Hose)
Removal
and
Installation (Tube)
MASTER CYLINDER
Cleaning
and
Inspection
Disassembly
and
Overhaul
Removal
and
Installation - Non-Power
Removal
and
Installation - Power
PARKING BRAKE
Description
PARKING BRAKE ACTUATOR
TO
CONTROL CABLE
Removal
and
Installation
PARKING BRAKE ACTUATOR
TO
EQUALIZER CABLE
Removal
and
Installation
PARKING BRAKE CONTROL
Removal
and
Installation
PARKING BRAKE EQUALIZER
TO
CONTROL CABLE
Removal
and
Installation
PARKING BRAKE EQUALIZER
TO
REAR WHEEL CABLE
Removal
and
Installation
PRESSURE DIFFERENTIAL VALVE
Removal
and
Installation
PRESSURE METERING VALVE
Removal
and
Installation
PROPORTIONING VALVE
Removal
and
Installation
WHEELCYLINDER
Cleaning
and
Inspection
Disassembly
and
Overhaul
Removal
and
Installation
MODEL APPLICATION
All
Models
02-05
02-03
02-08
02-08
02-40
02-39
02-21
02-06
02-22
02-08
02-07
02-10
Ford
02-18
02-19
02-34
02-35
02-27
N/A
02-35
N/A
02-23
Mercury
02-18
02-19
02-34
02-35
02-27
N/A
02-35
N/A
02-23
Meteor
02-18
02-19
02-34
02-35
02-27
N/A
02-35
N/A
02-23
Cougar
02-18
02-20
N/A
N/A
02-30
02-34
02-36
N/A
02-23
Fairlane
02-18
02-20
N/A
N/A
02-27
02-34
02-36
N/A
02-23
Falcon
02-18
02-20
N/A
N/A
02-27
02-34
02-36
N/A
02-23
Montego
02-18
02-20
N/A
N/A
02-27
02-34
02-36
N/A
02-23
Mustang
02-18
02-20
N/A
N/A
02-30
02-34
02-36
N/A
02-23
Lincoln-
Continental
02-18
N/A
N/A
N/A
02-30
02-35
02-36
02-24
02-24
Thunderbird
02-18
N/A
02-34
02-35
02-30
N/A
02-35
N/A
02-24
Continental-
Mark III
02-18
N/A
02-34
02-35
02-30
N/A
02-35
N/A
02-24
A page number indicates that the item
is for
the vehicle listed
at
the head
of
the column.
N/A indicates that the item is
not
applicable
to
the vehicle listed.
procarmanuals.com
Page 22 of 413
02-02-03
Brake System
02-02-03
DESCRIPTION
Disc brakes are available as option-
al equipment for the front wheels on
Ford, Mercury, Meteor, Fairlane,
Montego, Falcon, Mustang and Cou-
gar models and are standard on Thun-
derbird, Continental Mark III, and
Lincoln Continental models. The
dual-master cylinder equipped hydrau-
lic brake system employs single an-
chor, internal expanding and
self-
adjusting drum brake assemblies on
the rear wheels of vehicles with disc
brakes, and on the front and rear
wheels of all others.
A vacuum booster is used with the
power disc brake system.
DUAL MASTER CYLINDER
BRAKE SYSTEM
The dual-master cylinder brake sys-
tem has been incorporated in all mod-
els to provide increased safety. The
system consists of a dual-master cylin-
der (Fig. 1), pressure differential valve
assembly and a switch (Fig. 2). The
switch on the differential valve acti-
vates a dual-brake warning light, lo-
cated on the instrument panel.
DISC BRAKE
The disc brake consists of a venti-
lated rotor and caliper assembly. The
caliper used on all models except Lin-
coln Continental is a single piston
floating caliper (Fig. 3). The caliper
used on Lincoln Continental models is
a four piston fixed caliper (Fig. 4).
A proportioning valve in the rear
hydraulic circuit provides balanced
braking action between front and rear
brakes.
On all models except Lincoln a
pressure impulse valve located at the
primary inlet of the pressure differen-
tial valve prevents brake fluid surge
back to the master cylinder reservoir.
On Lincoln Continental models a
metering valve, in the hydraulic line
between the differential valve and the
front wheel disc brakes, prevents the
front brakes from applying until ap-
proximately 125 psi is obtained in the
system (Fig. 21). This delaying action
is required to prevent the front brakes
from performing all the braking ac-
tion on low speed stops and thereby
increasing the rate of lining wear.
FLOATING CALIPER—
ALL MODELS EXCEPT
LINCOLN CONTINENTAL
The caliper asseml.y is made up of
a floating caliper housing assembly
and an anchor plate. The anchor plate
is bolted to .the wheel spindle arm by
two bolts. The floating caliper is at-
tached to the anchor plate by steel
stabilizers on Ford, Mercury, Meteor,
Thunderbird and Continental Mark
III models and by one stabilizer on
Fairlane, Montego, Falcon, Mustang
and Cougar models. The floating cali-
per slides on two locating pins which
also attach to the stabilizers. The
floating caliper contains the single cyl-
inder and piston assembly. The cylin-
der bore contains a piston with a
molded rubber dust boot to seal the
cylinder bore from contamination
(Fig. 5). A square section rubber pis-
ton seal is positioned in a groove in
the cylinder bore and is used to pro-
vide sealing between the cylinder and
piston (Fig. 7).
The outer brake shoe and lining as-
sembly is longer than the inner assem-
bly, and the shoe and lining
DISC BRAKES
RETURN SPRING
(SECONDARY)
RETAINER
PRIMARY SYSTEM BRAKE
FLUID RESERVOIR
BOOT
PUSH ROD
TUBE SEAT |
(SECONDARY)
BRAKE OUTLET
PORT
RESIDUAL \ ^
CHECK \
VALVE \
SECONDARY PISTON
ASSEMBLY
(PRIMARY)
BRAKE OUTLET
PORT
PRIMARY PISTON
ASSEMBLY
H 1545-A
FIG.
I
—
Dual
Master Cylinder—Typicalprocarmanuals.com
Page 23 of 413
BRAKE WARNING LAMP SWITCH
PISTON
BRAKE WARNING LAMP SWITCH
BRAKE WARNING LAMP SWITCH
PLUNGER IN THE ON POSITION
CONNECTOR
BRAKE WARNING LAMP SWITCH
PLUNGER IN OFF POSITION
VALVE PISTON HAS MOVED
TO LOW PRESSURE AREA.
WARNING LAMP SWITCH
PLUNGER IS DEPRESSED,
LIGHTING THE BRAKE
WARNING LAMP
LOW PRESSURE SIDE
U
VALVE PISTON IS
CENTRALIZED. PRIMARY
AND SECONDARY SYSTEM
PRESSURES ARE EQUALIZED
BRAKE WARNING LAMP
SWITCH PLUNGER IN
OFF POSITION
HIGH PRESSURE SIDE
DRUM BRAKES
TJ
CONNEiCTOR
BRAKE FLUID
BRAKE WARNING LAMP I
SWITCH PLUNGER IN
ON POSITION
REAR BRAKE INLET
CONNECTOR
FRONT BRAKE
INLET
FRONT BRAKE
OUTLET
VALVE PISTON IS CENTRALIZED.
PRIMARY AND SECONDARY SYSTEM
PRESSURES ARE EQUALIZED
OUTLET TO
PROPORTIONING VALVE
DISC BRAKES
\
REAR BRAKE
PROPORTIONING
VALVE IS BYPASSED
VALVE PISTON HAS MOVED TO LOW
PRESSURE AREA. WARNING LAMP SWITCH PLUNGER IS
DEPRESSED, LIGHTING THE BRAKE WARNING LAMP H1634-A
FIG. 2—Pressure Differential Valve and Brake Warning Light Switch
CALIPER ASSEMBLY
BLEEDER
SCREW
EXTERNAL
TRANSFERTU3E
H1567-B
HUB
AND
ROTOR
ASSEMBLY
H 1647-A
FIG. 3—Disc Brake Assembly-
Floating Caliper—All Models
Except Lincoln Continental
FIG. 4—Disc Brake Assembly—
Fixed Caliper—Lincoln
Continental
blies are not interchangable (Fig. 23).
The outboard shoe and lining is fixed
to the floating caliper and is retained
by two pins and spring clips. The shoe
and lining assembly consists of fric-
tion material bonded to a metal plate
called the shoe. It is replaced as a
unit.
FIXED CALIPER
LINCOLN CONTINENTAL
The caliper assembly is bolted di-
rectly to the wheel spindle arm by two
bolts.
The caliper assembly consists of
two caliper housings bolted together
with each half containing two cylinder
bores of 1.938 inch diameter. Each
cylinder bore contains a piston with
an attached molded rubber dust boot
to seal the cylinder bore from contam-
ination (Fig. 6). Square-section rubberprocarmanuals.com
Page 24 of 413
02-02-05
Brake System
02-02-05
piston seals are positioned in grooves
in the cylinder bores and are used to
provide hydraulic sealing between the
cylinders and pistons (Fig. 7).
The cylinders are connected hydrau-
lically by means of internal passages
in the caliper housings and an external
transfer tube between the two halves
of the caliper assembly. One bleeder
screw and fluid inlet fitting is provided
on each caliper assembly.
The shoe and lining assemblies are
located in between parallel machined
abutments within the caliper, and are
supported radially by tabs on the
o'uter ends of the shoe assemblies (Fig.
46).
The shoes slide axially in the cali-
per abutments by means of the tabs
which ride on machined ledges (bridg-
es) when hydraulic pressure is applied
to the piston (Fig. 6). A shoe and lin-
ing assembly consists of friction mate-
rial riveted to a metal plate called the
shoe.
It is replaced as a unit. Clips are
attached to the top of the caliper to
retain the shoe and lining assemblies.
The caliper assembly is mounted on
the front wheel spindle to the rear of
the wheel vertical centerline.
ROTOR
The cast iron disc is of the ventilat-
ed rotor-type incorporating forty fins
and is attached to, and rotates with
the wheel hub. A splash shield bolted
to the spindle is used primarily to pre-
vent road contaminants from contact-
ing the inboard rotor and lining sur-
faces.
The wheel provides protection
for the outboard surface of the rotor.
DRUM BRAKE
The drum brake system employs
single anchor, internal expanding ancj
self adjusting brake assemblies.
The self-adjusting brake mechanism
consists of a cable, cable guide, ad-
justing lever, adjusting screw assem-
bly, and adjuster spring (Fig. 8). The
cable is hooked over the anchor pin at
the top and is connected to the lever
at the bottom. The cable is routed
along the webb of the secondary brake
shoe by means of the cable guide. The
adjuster spring is hooked to the pri-
mary brake shoe and to the lever. The
automatic adjuster operates only when
the brakes are applied while the vehi-
cle is moving rearward and only when
the secondary shoe is free to move
toward the drum beyond a predeter-
mined point.
CALIPER
HOUSING
PISTON
SHOE
LINING
PISTON SEAL
FIG. 5—Floating Caliper Assembly—Sectional View
CALIPER
TO
ROTOR
CLEARANCE
CALIPER
HOUSING
PISTON
SHOE
LINING
PISTON SEAL
H 1568-B
TRANSFER
TUBE
PISTON DUST BOOT
RETAINING
GROVE
CALIPER
DUST
BOOT
RETAINER
H 1648-A
FIG.
6—Fixed
Caliper Assembly—Sectional View
PISTON
PISTON SEAL
RELAXED
CALIPER
HOUSING
BRAKES APPLIED
FIG. 7—Function of Piston Seal
BRAKES RELEASED
H1569-Bprocarmanuals.com
Page 25 of 413
02-02-06
Brake
System
02-02-06
SHOE GUIDE (ANCHOR
PIN)
PLATE
SHOE GUIDE (ANCHOR
PIN)
PLATE
WASHER
PRIMARY SHOE
-TC
-ANCHOR
SPRING
PARKING
BRAKE LEVER
RETAINING
CLIP
SECONDARY
SHOE
PRIMARY
SHOE
CABLE HOOK
PARKING
BRAKE CABLE
AND HOUSING
PIVOT
NUT
AUTOMATIC
ADJUSTER
SPRING
H
1649-
A
FIG. 8—Self-Adjusting Brake Assemblies—Typical
BRAKE BOOSTER SYSTEM
This diaphragm-type brake booster
is
a
self-contained vacuum-hydraulic
braking unit mounted
on the
engine
side
of the
dash panel.
The brake booster
is of the
vacuum
suspended-type which utilizes engine
intake manifold vacuum
and
atmos-
pheric pressure
for its
power.
Adjustment
of the
push
rod and re-
placement
of the
check valve
and
grommet
are the
only services permit-
ted
on the
brake booster.
The
booster
unit
is to be
exchanged when
it is in-
spected, checked
and
found
to be de-
fective.
PARKING BRAKE
An independent foot-operated park-
ing brake control actuates
the
rear
wheel brake shoes through
a
cable
linkage.
On all
models except Ford,
Mercury, Meteor, Thunderbird
and
Continental Mark
III, the
operating
cable
is
routed from
the
parking brake
control assembly
to the
equalizer.
On
Ford, Mercury, Meteor, Thunderbird,
and Continental Mark
III, the
operat-
ing cable
is
routed from
the
parking
brake control assembly
to the
actuator
assembly.
An
intermediate cable
con-
nects
the
actuator
to the
equalizer.
The rear brake cables connect
the
equalizer assembly
to the
parking
brake lever
at
each rear secondary
shoe
(Fig. 8).
Two types
of
brake pedal control
are used.
The
automatic (vacuum)
re-
lease type
(Fig. 9) is
used
on the Mer-
cury, Ford
LTD,
Meteor LeMoyne,
Thunderbird, Continental Mark
III
and Lincoln Continental models.
All
other models
use the
manual release-
type
(Fig. 10).
On
the
automatic-type,
the
vacuum
PISTON
ROD
VACUUM POWER UNIT
RELEASE LEVER
PEDAL
H 1635-A
FIG. 9—Parking Brake Control Assembly
With Automatic Release—Typicalprocarmanuals.com
Page 26 of 413
02-02-07
Brake System
02-02-07
ANTI-SKID CONTROL SYSTEM
RELEASE PAWL CAM PIN
RELEASE PAWL CAM LEVER
RELEASE CABLE
H
1636-
A
FIG. 10—Parking Brake Control Assembly
With Manual Release—Typical
power unit with mounting bracket is
riveted to the control assembly. The
vacuum actuated piston within the
unit is connected by a rod to the
upper end of the release lever (Fig. 9).
The lower end of the release lever ex-
tends out for alternate manual release
in the event of vacuum power failure
or for optional manual release at any
time.
Hoses connect the power unit and
the engine manifold to a vacuum re-
lease valve in the transmission neutral
safety switch.
The anti-skid control system con-
sists of three major components (Fig.
39).
Mechanically driven electromag-
netic sensors at each rear wheel; an
electronic control module mounted
under the glove box; a vacuum pow-
ered actuator attached to a bracket on
the inside of the right front frame rail
under the toe board.
The sensors consist of steel rings
having teeth on their outer diameters,
pressed on each axle shaft just out-
board of the wheel bearing. The teeth
rotate past corresponding teeth on the
inside diameter of stationary steel
rings mounted in the bearing retain-
ers.
Also mounted in the retainers, are
ring-shaped permanent magnets and
coils of wire. Two wires from each
sensor connect the sensors to the con-
trol module.
The control module consists of solid
state electronic components sealed in
a container. It is connected to the sen-
sors and to a solenoid on the actuator.
The actuator is similar to a vacuum
brake booster and consists of three
parts.
A chamber divided by a vacuum
suspended diaphragm; a hydraulic cyl-
inder connected to the diaphragm; and
a solenoid connected electrically to the
control module.
IN-VEHICLE ADJUSTMENTS AND REPAIRS
After any brake service work, ob-
tain a firm brake pedal before moving
the vehicle. Riding the brake pedal
(common on left foot application)
should be avoided when driving the
vehicle.
BRAKE SHOE ADJUSTMENTS—
DRUM BRAKES
The hydraulic drum brakes are
self-adjusting and require a manual
adjustment only after the brake shoes
have been relined, replaced, or when
the length of the adjusting screw has
been changed while performing some
other service operation. The manual
adjustment is performed with the
drums removed, using the tool and the
procedure detailed below.
When adjusting the rear brake
shoes,
check the parking brake cables
for proper adjustment. Make sure that
the equalizer operates freely.
To adjust the brake shoes:
1.
Use Rotunda Tool HRE 8650,
(Fig. 11) to determine the inside diam-
eter of the drum braking surface.
2.
Reverse the tool as shown in Fig.
11 and adjust the brake shoe diameter
to fit the gauge. Hold the automatic
adjusting lever out of engagement
while rotating the adjusting screw, to
prevent burring the screw slots. Make
sure the adjusting screw rotates freely.
If necessary, lubricate the adjusting
screw threads with a thin, uniform
coating of MIC-100-A.
3.
Rotate Tool HRE 8650 around
the brake shoes to be sure of the set-
ting.
4.
Apply a small quantity of high
temperature grease to the points
where the shoes contact the backing
plate, being careful not to get the lu-
bricant on the linings.
5. Install the drums. Install Tinner-
man nuts and tighten securely.
6. Install the wheels on the drums
and tighten the nuts to specification.
7.
Complete the adjustment by
applying the brakes several times with
a minimum of 50 lbs pressure on the
pedal while backing the vehicle. After
each stop the vehicle must be moved
forward.
8. After the brake shoes have been
properly adjusted, check the operation
of the brakes by making several stops
while operating in a forward direction.
WHEEL CYLINDER REPAIR-
DRUM BRAKE
Wheel cylinders should not be di-
sassembled unless they are leaking or
unless new cups and boots are to be
installed. It is not necessary to remove
the brake cylinder from the backing
plate to disassemble, inspect, or hone
and overhaul the cylinder. Removal is
necessary only when the cylinder is
damaged or scored beyond repair.procarmanuals.com
Page 27 of 413
02-02-08
Brake System
02-02-08
Tool-HRE-8650
JUST SET TO DRUM
DIAMETER HERE . . .
FIND CORRECT BRAKE
SHOE DIAMETER HERE
H1416-A
FIG.
7
7—Adjusting Brake Shoes Using Tool HRE-8650
BOOT
BOOT
PISTON
. BLEEDER .
CYLINDER
SCREW RETURN SPRING PIST0N
H1385-B
FIG. 72—Brake Wheel Cylinder—Typical
DISASSEMBLY
1.
Remove the links and the rubber
boots from the ends of the brake cyl-
inder. Remove the pistons, cups, and
return spring from the cylinder bore
(Fig. 12).
2.
Remove the bleeder screw from
the cylinder.
INSPECTION
1.
Wash all parts in clean brake
fluid. Dry with compressed air.
2.
Replace scored pistons. Always
replace the rubber cups and dust
boots.
3.
Inspect the cylinder bore for
score marks or rust. If either condi-
tion is present the cylinder bore must
be honed. However, the cylinder
should not be honed more than 0.003
inch beyond its original diameter.
4.
Check the bleeder hole to be sure
that it is open.
ASSEMBLY
1.
Apply a light coating of heavy-
duty brake fluip! to all internal parts.
2.
Thread the bleeder screw into the
cylinder and tighten securely.
3.
Insert the return spring, cups,
and pistons into their respective posi-
tions in the cylinder bore (Fig. 12).
Place a boot over each end of the cyl-
inder. Bleed the brake system.
HYDRAULIC LINE REPAIR
Steel tubing is used throughout the
brake system with the exception of the
flexible hoses at the front wheels and
at the fear axle housing brake tube
connection (Figs. 17 thru 21).
Always bleed the applicable pri-
mary or secondary brake system after
primary or secondary brake system
hose or line replacement. Centralize
the pressure differential valve after
bleeding the system.
BRAKE TUBE
REPLACEMENT
If a section of the brake tubing be-
comes damaged, the entire section
should be replaced with tubing of the
same type, size, shape and length.
Copper tubing should not be used in a
hydraulic system. When bending
brake tubing to fit underbody or rear
axle contours, be careful not to kink
or crack the tube.
All brake tubing should be double
flared properly to provide good leak-
proof connections. Clean the brake
tubing by flushing with clean brake
fluid before installation.
When connecting a tube to a hose,
tube connector, or brake cylinder,
tighten the tube fitting nut to specified
torque with Milbar tool 1112-144 or
equivalent.
BRAKE HOSE
REPLACEMENT
A flexible brake hose should be re-
placed if it shows signs of softening,
cracking, or other damage.
When installing a new front brake
hose,
position the hose to avoid con-
tact with other chassis parts. Place a
new copper gasket over the hose fit-
ting and thread the hose assembly into
the front wheel cylinder. Engage the
opposite end of the hose to the brack-
et on the frame. Install the horsesho-
e-type retaining clip, and connect the
tube to the hose with the tube fitting
nut (Figs. 17 thru 21).
A rear brake hose should be in-
stalled so that it does not touch the
muffler outlet pipe or shock absorber.
Thread the hose into the rear brake
tube connector. Engage the front end
of the hose to the bracket on the
frame. Install the horseshoe-type re-
taining clip, and connect the tube to
the hose with the tube fitting nut.procarmanuals.com
Page 28 of 413
02-02-09
Brake System
02-02-09
REMOVAL AND INSTALLATION
FRONT BRAKE DRUM
REMOVAL
1.
Raise the vehicle until the wheel
and tire clear the floor. Remove the
wheel cover or hub cap, and remove
the wheel and tire from the drum.
2.
Remove the grease cap from the
hub.
Remove the cotter pin, nut lock,
adjusting nut, and flat washer from
the spindle. Remove the outer bearing
cone and roller assembly.
3.
Pull the drum off the wheel
spindle.
4.
If the drum will not come off,
pry the rubber cover from the brake
backing plate. Insert a narrow screw-
driver through the slot and disengage
the adjusting lever from the adjusting
screw. While holding the adjusting
lever away from the screw, back off
the adjusting screw with the brake ad-
justing tool (Fig. 13). Be very careful
not to burr, chip, or damage the
notches in the adjusting screw; other-
wise the self-adjusting mechanism will
not function properly.
INSTALLATION
1.
If the drum is being replaced, re-
move the protective coating from the
new drum with carburetor degreaser.
Then, use sandpaper to insure that no
residue remains. Wipe the drum with
a cloth soaked with denatured alcohol.
Install new bearings and grease seal.
Pack the wheel bearings, install the
inner bearing cone and roller assembly
RUBBER PLUG
REMOVED
'MOVE HANDLE UPWARD
TO RETRACT BRAKE SHOES
in the inner cup, and install the new
grease seal see Part 3-5, Section 4.
If the original drum is being in-
stalled, make sure that the grease in
the hub is clean and adequate.
2.
Adjust the brakes and install the
drum assembly as outlined under
Brake Shoe Adjustments in this sec-
tion.
3.
Install the outer wheel bearing,
washer and adjusting nut.
4.
Adjust the wheel bearing as out-
lined in Part 3-7, Section 2, then in-
stall the grease cap. Install the wheel
and hub cap.
REAR BRAKE DRUM
REMOVAL
1.
Raise the vehicle so that the tire
is clear of the floor.
2.
Remove the hub cap and wheel.
Remove the three Tinnerman nuts and
remove the brake drum. If the drum
will not come off, pry the rubber
cover from the backing plate. Insert a
narrow screwdriver through the hole
in the backing plate, and disengage
the adjusting lever from the adjusting
screw. While holding the adjusting
lever away from the adjusting screw,
back off the adjusting screw with the
brake adjusting tool (Fig. 13). Be very
careful not to burr, chip, or damage
the notches in the adjusting screw;
otherwise, the self-adjusting mecha-
nism will not function properly.
INSTALLATION
1.
Remove the protective coating
from a new drum with carburetor de-
greaser; then sand lightly and wipe
with a cloth soaked with denatured al-
cohol.
HI 590-A
H1390-A
FIG. 73—Backing Off Brake
Adjustment
FIG. 14—Retracting Spring
Removal
2.
Adjust the brakes as outlined
under Brake Shoe Adjustments in this
section. Place the drum over the brake
assembly and into position.
3.
Install the three Tinnerman nuts
and tighten securely. Install the wheel
on the axle shaft flange studs against
the drum, and tighten the attaching
nuts to specifications.
BRAKE SHOES AND
ADJUSTING SCREW-
DRUM BRAKES
REMOVAL
1.
With the wheel and drum re-
moved install a clamp over the ends of
the brake cylinder as shown in Fig.
14.
2.
Remove the secondary shoe to
anchor spring with the tool shown in
Fig. 14. With the same tool remove
the primary shoe to anchor spring and
unhook the cable eye from the anchor
pin.
3.
On Ford, Mercury, Meteor,
Thunderbird, Continental Mark III
and Lincoln Continental models, re-
move the shoe guide (anchor pin)
plate (Fig. 8).
4.
Remove the shoe hold-down
springs, shoes, adjusting screw, pivot
nut, socket and automatic adjustment
parts.
5.
On rear brakes, remove the
parking brake link and spring. Dis-
connect the parking brake cable from
the parking brake lever.
*>.
After removing the rear brake
secondary shoe, disassemble the park-
ing brake lever from the shoe by re-
moving the retaining clip and spring
washer (Fig. 8).
INSTALLATION
1.
Before installing the rear brake
shoes,
assemble the parking brake
lever to the secondary shoe and secure
with the spring washer and retaining
clip.
2.
Apply a light coating of high-
temperature grease at the points
where the brake shoes contact the
backing plate.
3.
Position the brake shoes on the
backing plate and secure the assembly
with the hold down springs. On the
rear brake, install the parking brake
link and spring, back off the parkingprocarmanuals.com
Page 29 of 413
02-02-10
Brake System
02-02-10
brake adjustment then connect the
parking brake cable to the parking
brake lever (Fig. 8).
4.
Install the shoe guide (anchor
pin) plate on the anchor pin when so
equipped.
5.
Place the cable eye over the an-
chor pin with the crimped side toward
the backing plate.
6. Install the primary shoe to an-
chor spring (Fig. 15).
H1391-A
FIG. 75—Retracting Spring
Installation
7.
Install the cable guide on the
secondary shoe web with the flanged
hole fitted into the hole in the second-
ary shoe web. Thread the cable
around the cable guide groove (Fig.
8).
It
is
imperative that
the
cable
be
positioned
in
this groove
and not be-
tween
the
guide
and the
shoe
web.
8.
Install the secondary shoe to an-
chor spring with the tool shown in
Fig. 15.
Be certain that
the
cable
eye is not
cocked
or
binding
on the
anchor
pin
when installed.
All
parts should
be
flat
on
the
anchor
pin.
Remove
the
brake
cylinder clamp.
9. Apply high-temperature grease
(MIC-100-A) to the threads and the
socket end of the adjusting screw.
Turn the adjusting screw into the ad-
justing pivot nut to the limit of the
threads and then back off 1/2 turn.
Interchanging
the
brake shoe
ad-
justing screw assemblies from
one
side
of
the
vehicle
to the
other would cause
the brake shoes
to
retract rather than
expand each time
the
automatic
ad-
justing mechanism operated.
To pre-
vent installation on the wrong side of
the vehicle, the socket end of the ad-
justing screw is stamped with an R or
L (Fig. 16). The adjusting pivot nuts
can be distinguished by the number of
grooves machined around the body of
the nut. Two grooves on the nut indi-
cate a right thread; one groove indi-
cates a left thread.
10.
Place the adjusting socket on
the screw and install this assembly be-
tween the shoe ends with the adjusting
screw toothed wheel nearest the sec-
ondary shoe.
11.
Hook the cable hook into the
hole in the adjusting lever. The adjust-
ing levers are stamped with an R or L
to indicate their installation on right
or left brake assembly (Fig. 16).
12.
Position the hooked end of the
ADJUSTING LEVER
IDENTIFICATION LINES
H1143-C
FIG. 16—Adjusting Screw
and
Lever Identification
adjuster spring completely into the
large hole in the primary shoe web.
The last coil of the spring should be at
the edge of the hole. Connect the loop
end of the spring to the adjuster lever
hole.
13.
Pull the adjuster lever, cable
and automatic adjuster spring down
and toward the rear to engage the
pivot hook in the large hole in the sec-
ondary shoe web (Fig. 8).
14.
After installation, check the ac-
tion of the adjuster by pulling the sec-
tion of the cable between the cable
guide and the anchor pin toward the
secondary shoe web far enough to lift
the lever past a tooth on the adjusting
screw wheel. The lever should snap
into position behind the next tooth,
and release of the cable should cause
the adjuster spring to return the lever
to its original position. This return ac-
tion of the lever will turn the adjusting
screw.one tooth.
If pulling the cable does not pro-
duce the action described, or if the
lever action is sluggish instead of posi-
tive and sharp, check the position of
the lever on the adjusting screw
toothed wheel. With the brake in a
vertical position (anchor at the top),
the lever should contact the adjusting
wheel 3/16 inch (plus or minus 1/32
inch) above the centerline of the
screw. If the contact point is below
this centerline, the lever will not lock
on the teeth in the adjusting screw
wheel, and the screw will not be turned
as the lever is actuated by the cable.
To determine the cause of this con-
dition:
a. Check the cable end fittings. The
cable should completely fill or extend
slightly beyond the crimped section of
the fittings. If it does not meet this
specification, possible damage is indi-
cated and the cable assembly should
be replaced.
b.
Check the cable length. On
Ford, Mercury, Meteor, Thunderbird,
Continental Mark III, and Lincoln
Continental models, the cable should
measure 11 1/8 inches (plus or minus
1/64 inch) from the end of the cable
anchor to the end of the cable hook.
On Fairlane, Montego, Falcon,
Mustang, and Cougar models the
cable should measure 8 13/32 inches
on 9 inch brakes or 9 3/4 inches on
10 inch brakes from the end of the
cable anchor to the end of the cable
hook.
c. Check the cable guide for dam-
age.
The cable groove should be paral-
lel to the shoe web, and the body of
the guide should lie flat against the
web.
Replace the guide if it shows
damage.
d. Check the pivot hook on the
lever. The hook surfaces should be
square with the body of the lever for
proper pivoting. Replace the lever if
the hook shows damage.
e. See that the adjusting; screw
socket is properly seated in the notch
in the shoe web.
WHEEL CYLINDER
DRUM BRAKE
REMOVAL '
1.
Remove the wheel and the drum.
2.
Remove the brake shoe assem-
blies,
following procedures outlined in
this section.
3.
Disconnect the brake line from
the brake cylinder Figs. 17 thru 21.
On
a
vehicle with
a
vacuum brake
booster,
be
sure
the
engine
is
stopped
and there
is no
vacuum
in the
booster
system before disconnecting
the hy-
draulic lines.
To disconnect the hose at a front
cylinder, loosen the tube fitting that
connects the opposite end of the hose
to the brake tube at a bracket on the
frame. Remove the horseshoe-type re-
taining clip from the hose and brack-
et, disengage the hose from the brack-
et, then unscrew the entire hose as-
sembly from the front wheel cylinder.
At a rear cylinder, unscrew the tubeprocarmanuals.com
Page 30 of 413
TUBE 2B253 TUBE 2263
SWITCH 2B264
TUBE 2265
VIEWZ
DRUM BRAKE
VIEWY
DISC BRAKE
VIEW IN CIRCLE M
VIEW Y
TYPICAL 2 PLACES
DRUM BRAKE
VIEW IN CIRCLE K
H 1639-A
FIG. 17—Service Brake System—Ford, Mercury and Meteorprocarmanuals.com