Ford Thunderbird 1964 - Push Rod Gauge Dimensions; Hydraulic System Bleeding; Manual Bleeding; Pressure Bleeding

24
GROUP
2
BRAKES
#16
GAUGE
SHEET
STEEL
H1208-A
FIG.
2-Push
Rod
Gauge
Dimensions
correct
relationship
between
the
booster
control
valve
plunger and the
master cylinder
piston.
Failure to
maintain
this
relationship
will pre
vent the master
cylinder piston from
completely
releasing
hydraulic pres
sure and
can
cause the
brakes
to
drag.
To
check the adjustment
of
the
screw,
fabricate a
gauge
of
the
di
mensions
shown
in
Fig. 2. Then
ADJUSTMENT
SCREW
place
the gauge
against the master
cylinder
mounting
surface
of
the
booster
body
as
shown
in
Fig. 3. The
push rod screw
should be
adjusted
so
that the
end
of the screw
just
touches the
inner
edge of
the slot
in
the
gauge.
This is an
approximate
adjust
ment
only.
To
verify
the
adjustment,
look
through the
make-up
(rear)
port when
installing
the
master
cylin
der
to the
booster. The
master
cylin
der
piston
should not
move
more
than
0.015 inch
as it
contacts
the
push
rod.
No
movement (exact
con
tact)
is ideal.
HYDRAULIC SYSTEM
BLEEDING
When
any
part of the hydraulic
system
has been
disconnected for
repair or
replacement,
air
may
get
into the
lines
and cause
spongy
pedal
action. Bleed the
hydraulic
system
after
it
has
been
properly
connected
to
be
sure
that all air
is
expelled from
the
brake
cylinders
and lines.
The
hydraulic system can
be
bled
manually
or with pressure
bleeding
equipment.
MANUAL
BLEEDING
Bleed the
longest
lines
first.
Keep
the master
cylinder reservoir
filled
with
new
heavy-duty
brake
fluid dur
ing
the
bleeding
operation.
Never
use brake fluid which
has
been
drained
from
the
hydraulic
system.
1. Position
a
bent
3/s-inch
box
wrench
on the bleeder
fitting
on
the
right rear
brake wheel cylinder
(Fig.
4). Attach a rubber
drain tube to
the bleeder
fitting. The
end
of the
tube should fit
snugly
around
the
bleeder fitting.
2.
Submerge the free end of
the
tube
in
a
container
partially
filled
with
clean
brake
fluid,
and loosen
the bleeder
fitting
approximately
Va
turn.
3. Push
the
brake
pedal down
slowly
thru
its full
travel.
Close
the
bleeder
fitting,
then
return the
pedal to
the fully-released
position.
APPROXIMATELY
45
Push
Rod
Gauge
FIG.
3-Push
Rod
Adjustment
H1209-A
HI
300-
A
FIG.
4-Wrench for
Bleeding
Brake
Repeat
this
operation
until
air
bub
bles
cease to
appear at
the
submerged
end of
the tube.
4.
When the
fluid is
completely
free of
air
bubbles,
close the
bleeder
fitting
and
remove
the drain
tube.
5. Repeat this
procedure
at
each
brake wheel
cylinder
in
order:
left
rear,
right
front,
and left
front.
Refill
the master
cylinder
reservoir
after
each
brake cylinder is
bled
and
when
the
bleeding
operation
is
completed.
The
fluid
level
should be
within
%
inch of
the
top
of the
reservoir.
PRESSURE
BLEEDING
Bleed
the
longest
lines
first.
Never
use
brake fluid
which has
been
drained from the hydraulic
system.
The bleeder tank
should
contain
enough
new
heavy-duty
brake fluid
to
complete
the
bleeding
operation,
and
it
should be charged
with
10-30
pounds of
air pressure.
1.
Clean all dirt from
the
master
cylinder reservoir cap.
2.
Remove the master
cylinder
reservoir
cap,
install an
adapter
cap
to the
reservoir,
and attach the
bleeder tank
hose
to
the
fitting
on
the
adapter cap.
Adapter
cap
2162 can be
used,
or
an
adapter
cap
can be
fabricated
by
cutting
a
hole
in
the center of a
reservoir
cap
and
soldering
a
fitting
at the hole.
3. Position a
3/s-inch box
wrench
on the
bleeder
fitting
on the
right rear
brake wheel
cylinder (Fig.
4). At
tach
a
rubber drain tube
to
the
bleeder fitting. The
end
of
the tube
should fit
snugly
around the
bleeder
fitting.
4. Open the
valve on the
bleeder
tank to
admit pressurized
brake fluid
to the master
cylinder
reservoir.
5.
Submerge the free end
of
the
tube in
a
container
partially
filled
with clean
brake
fluid,
and
loosen
the bleeder
fitting.
6. When
air
bubbles
cease
to
ap
pear
in
the
fluid
at the
submerged
end of the
drain
tube,
close
the
bleeder
fitting
and
remove
the tube.
7.
Repeat
this
procedure
at
each
brake wheel
cylinder
in
order:
left
rear,
right
front,
and
left
front.
8. When
the
bleeding
operation
is
completed,
close the
bleeder
tank
valve
and
remove the
tank
hose
from
the
adapter
fitting.
9.
Remove
the
adapter
cap,
refill
the
master
cylinder
reservoir
to
within '/i
inch from
the
top
of
the
reservoir,
and
install
the
reservoir
cap.