1969 FORD MUSTANG brake

02-02-01
Brake System

02-02-01

Part 2-2 Brake
System

COMPONENT INDEX

ANTI SKID CONTROL SYSTEM

Description

ANTI SKID CONTROL ACTUATOR

Removal and Installation

ANTI SKID CONTROL MODULE

Removal and Installation

ANTI SKID CONTROL SENSOR

Removal and Installation

BRAKE BACKING PLATE (DRUM)

Removal and Installation

BRAKE BOOSTER

Cleaning and Inspection
-
See Part 2-1

Description

Removal and Installation

BRAKE DRUM

Cleaning and Inspection
-
See Part 2-1

Refinishing

Removal and Installation (Front)

Removal and Installation (Rear)

BRAKE PEDAL

Removal and Installation

BRAKE SHOES (DRUM)

Adjustments

Relining

Removal and Installation

DISC BRAKE

Description

DISC BRAKE CALIPER

Cleaning and Inspection

Disassembly and Overhaul

Removal and Installation

DISC BRAKE ROTOR AND HUB

Cleaning and Inspection
—
See Part 2-1

Refinishing

Removal and Installation

DISC BRAKE ROTOR SPLASH SHIELD

Removal and Installation

DISC BRAKE SERVICE PRECAUTIONS

—
See Part 2-1
MODEL APPLICATION
All
Models

02-16

02-06

02-24

02-39

02-09

02-09

02-07

02-39

02-09

02-03

02-39

02-19

02-19
Ford
N/A

N/A

N/A

N/A

02-09

02-25

02-41

02-41

02-16
Mercury
N/A

N/A

N/A

N/A

02-09

02-25

02-41

02-41

02-16
Meteor
N/A

N/A

N/A

N/A

02-09

02-25

02-41

02-41

02-16
Cougar
N/A

N/A

N/A

N/A

02-09

02-25

02-41

02-41

02-16
Fairlane
N/A

N/A

N/A

N/A

02-09

02-25

02-41

02-41

02-16
Falcon
N/A

N/A

N/A

N/A

02-09

02-25

02-41

02-41

02-16
Montego
N/A

N/A

N/A

N/A

02-09

02-25

02-41

02-41

02-16
Mustang
N/A

N/A

N/A

N/A

02-09

02-25

02-41

02-41

02-16
Lincoln-
Continental
N/A

N/A

N/A

N/A

N/A

02-27

02-42

02-41

02-17
Thunderbird
02-07

02-36

02-38

02-38

N/A

02-26

04-41

02-41

02-16
Continental-
Mark
III
02-07

02-36

02-38

02-38

N/A

02-26

02-41

02-41

02-16

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

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

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

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

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

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

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

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