Ford Thunderbird 1964 - GROUP 2 BRAKES; PART 2-1 GENERAL BRAKE SERVICE

PART
2-1
GENERAL
BRAKE
SERVICE
PART
2-2
BRAKE
SYSTEM
PAGE
. 2-1
PART
2-3
SPECIFICATIONS
PAGE
.2-21
2-6
PART
2-1
GENERAL
BRAKE SERVICE
Section
Page
1
Diagnosis and
Testing
2-1
2
Common
Adjustments and
Repairs 2-3
Section
3
Cleaning
and Inspection
Page
. .2-5
DIAGNOSIS AND
TESTING
PRELIMINARY
TESTING
1. Check
the fluid level in
the
master
cylinder,
and add
FoMoCo
heavy-duty
brake fluid if required.
2.
Push the brake pedal down
as
far
as
it will go
while the
engine
is
running
or vacuum
is
in system and
car
is
standing
still. If the
pedal
travels
more
than
halfway
between
the
released position and the
floor,
check the
brake
adjustment and the
automatic adjusters.
To
check adjuster
operation,
check
the shoes
and
the adjuster
com
ponents
for
binding
or improper in
stallation
and
follow
the
procedure
described under "Brake Shoe Ad
justments"
in Part
2-2,
Section
2.
Make
several reverse brake
stops
to
ensure
uniform
adjustment at
all
wheels.
3.
With
the
transmission in
neu
tral,
stop
the engine and
apply
the
parking
brake.
Depress
the
service
brake pedal
several
times
to
exhaust
all
vacuum
in
the system.
Then,
de
press
the
pedal and
hold
it
in the
applied
position.
Start
the
engine. If
the vacuum
system
is
operating,
the
pedal
will
tend to fall
away
under
foot pressure
and
less pressure
will
be
required
to hold
the
pedal
in the
applied
position. If
no
action
is
felt,
the vacuum
booster system
is
not
functioning. Follow
the
procedures
in
the
"Booster
Diagnosis
Guide."
4.
With the engine
shut
off,
ex
haust all
vacuum in
the system.
De
press the brake
pedal
and hold
it in
the
applied position.
If the
pedal
gradually
falls
away
under
this pres
sure,
the
hydraulic
system
is leaking.
Check all
tubing,
hoses,
wheel
cylin
ders,
and
connections for
leaks.
If the brake
pedal
movement feels
spongy,
bleed
the
hydraulic system
to
remove
air from
the
lines and
cylinder.
See
"Hydraulic
System
Bleeding,"
Section
2.
Also,
check
for
leaks
or
insufficient
fluid.
5. Should
one
of
the
brakes
be
locked
and the
car
must
be
moved,
open the
brake
cylinder
bleeder
screw
long
enough
to
let out
a few
drops of brake
fluid.
This
bleeding
operation
will
release
the
brakes,
but
it will
not
correct
the cause
of
the
trouble.
ROAD
TEST
The car
should
be
road
tested
only
if
the
brakes
will
safely
stop
the
car.
Apply
the
brakes at
a
speed
of
25-30
mph
to
check
for
the
exist
ence
of the
trouble
symptoms
listed
in
Table
1,
with
the
exception
of
brake
chatter
and
those
symptoms
resolved
in
the
preliminary
tests.
For
each of
the
symptoms
encountered,
check
and
eliminate
the
causes
which
are
also
listed
in
Table
1.
To
check
for
brake
chatter
or
surge,
apply
the
brakes
lightly
at
approximately
50
mph.
For
booster
removal
and
installa
tion
procedures,
refer
to
-Part
2-2,
Section 3.
For
disassembly
and
as
sembly
procedures,
refer
to
Part
2-2,
Section
4.
For
cleaning
and
inspec
tion
refer
to
Part
2-1, Section
3.