Common Adjustments And Repairs - Ford Thunderbird 1965 Shop Manual

24
GROUP 2
-BRAKES
BOOSTER DIAGNOSIS
GUIDE
BOOSTER
INOPERATIVE-
HARD PEDAL
If
the
preliminary
tests
show
that pair or replace parts as necessary.
the
booster
is inoperative
or
if
a
If the foregoing
procedure
does
hard
pedal condition still exists after not eliminate
the trouble, remove
the
eliminating
the
causes of
"Excessive booster from
the
car.
Separate the
Pedal
Effort"
or
"Hard
Pedal"
listed
front
shell
from
the
rear shell,
and
in Tables 1
and
2
the trouble
may be
check
the
valve
and rod
assembly
caused
by
vacuum
leakage.
Discon-
reaction
disc,
diaphragm
plates and
nect
the
vacuum
line
at
the
booster, diaphragm
assemblies
for damage
remove
the
vacuum
manifold and
that
would cause
leaks.
When
as-
check valve assembly, and
look for
a sembling,
be
sure
that the
diaphragm
sticking or
faulty
check valve.
Check
assemblies are properly
positioned.
all vacuum connections
for leakage
Improper location
could
cause
leak-
or obstruction.
Check
all
hoses for
a
age
between
the
vacuum and
atmos-
leaking
or collapsed condition.
Re-
pheric sides of
the
diaphragms.
BRAKES DRAG OR GRAB
If
the
brakes
still
drag
or
grab plunger
assembly.
Remove
and
dis-
after
eliminating
the
causes
listed in
assemble
the
booster.
Clean, inspect,
Tables 1
and
2, the
condition
is
and replace parts as necessary.
probably
caused
by
a
sticking
valve
SELF APPLICATION OF
BRAKES WHEN
ENGINE STARTS
Remove
and
disassemble
the
seated valve poppet.
Clean,
inspect
booster. Check for
a
leak in
the
and replace parts as necessary.
Be
rear shell.
Check
the
diaphragms
sure
that the
diaphragms
are
properly
for being
out of
locating
radii
in
the
located
when
assembling.
housing. Check for
a
sticking
or
un-
COMMON ADJUSTMENTS AND REPAIRS
PARKING BRAKE LINKAGE
ADJUSTMENT
Check
the
parking brake
cables
when
the
brakes
are
fully
released.
If
the
cables are
loose,
adjust
them
as
follows:
1.
Fully
release
the
parking brake
pedal
by
pushing down
the
manual
release
lever.
2. Raise
the car.
3. Adjust the
equalizer
lever
against
the
cable
spring
on
the
pedal
cable
to
the
dimension
shown
in
Fig. 1.
4.
Loosen
the
adjusting
nut on
the
equalizer rod, and
then turn the
lock
nut
in front
of
the
equalizer several
turns
forward.
5.
Depress
the
parking brake
pedal
1% inches from its
normal released
position.
6. While
turning
the
rear wheels
in
a
rearward
direction, turn
the
ad
justing nut against
the
equalizer
until
a moderate
drag
is felt (Fig.
1).
7. When
the cables are
properly
adjusted, tighten
the
locknut
against
the equalizer.
8. Release
the
parking
brake,
and
check
to
make sure
that
the
brake
shoes return
to the fully
released
position.
9. Depress
the
parking
brake
pedal
two
inches. Under
normal
conditions,
this
will satisfactorily
hold
the
car.
U-CLIP
10. Release
the
parking
brake
again,
and
then
depress
the
pedal
Viinch. The brakes
should not
drag
with
the
pedal
depressed Vz inch.
If
the
rear
brakes do
not
fully
re
lease,
check
the
cables
for kinks
or
binds. Free
the
cables as required.
LEVER-TO-CABLE
ADJUSTING NUT
EQUALIZER
LEVER
CABLES TO
REAR WHEELS
H1307-A
FIG. 1
-Parking
Brake Adjustments