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2-4
re-use
brake fluid that has been
drained
from
the hydraulic system.
The
tank should be charged with
approximately 10 to 30 pounds of air
pressure. Never exceed 50 pounds
pressure.
1. Remove the warning light
switch from the master cylinder
prior to bleeding the system. If this
is not done the switch may
be
damaged.
2. Clean all
dirt
from the master
cylinder reservoir cover.
3. Remove the master cylinder
reservoir cover and rubber gasket,
and fill
the master
cylinder reservoir
with
the
specified brake fluid. Install
the pressure bleeder adapter tool to
the master cylinder and attach the
bleeder tank hose to the fitting on
tHe adaptor.
Master cylinder pressure bleeder
adaptor tools can be obtained from
the
various
manufacturers of pres-
sure bleeding equipment. Follow the
instructions of the manufacturer
when
installing
tlte
adaptor.
4. If the rear wheel cylinders, the
secondary brake system, are to be
bled, position a
i
inch ring spanner
(Fig.
1) on the
bleeder
fitting on the
left rear brake wheel cylinder.
Attach a bleeder tube to the
bleeder fitting. The end of the tube
should fit snugly around the bleeder
fitting.
5. Open
the valve
on the bleeder
tank to
admit pressurized brake fluid
to the master
cylinder reservoir.
6.
Submerge
the
free end of the
tube in
a container partially filled
GROUP
2-BRAKES
with clean brake fluid, and loosen the
bleeder fitting.
7. When air bubbles cease to
appear in the fluid at the submerged
end of the bleeder tube, close the
bleeder fitting and remove the tube.
8. Repeat steps 3 to 7 at the right
rear wheel cylinder.
9. If the vehicle is equipped with
disc brakes, repeat steps 4 to 7,
starting at the left front disc caliper
and ending at the right front disc
caliper.
10. If the vehicle contains drum-
type front brakes and the primary
(front) brake system is to be bled,
repeat steps 4 to 7 starting at the left
front wheel cylinder ending at the
right front wheel cylinder.
11. When the bleeding operation
is completed, close the bleeder tank
valve and remove the tank hose from
the adaptor fitting.
12. On disc brake equipped ve-
hicles, be sure that the front brake
pistons are returned to their normal
positions and that the shoe and lining
assemblies are properly seated by
depressing the brake pedal several
times until normal
pedal
travel is
established.
13. Remove the Pressure Bleeder
Adaptor Tool. Fill the master cylin-
der reservoirs to within
i
inch of the
top. Install the master cylinder cover
and gasket.
Be
sure the diaphragm
type gasket
is
properly positioned in
the master cylinder cover.
14. Replace the warning light
switch in the tntiter cylinder.
EJ
CLEANING AND INSPECTION
DISC BRAKES
1. Remove the wheel and tyre
and
the
shoe and lining
assemblies as
outlined on
Page 2-22.
2. On all
models
make thickness
measurements
with
a micrometer
across the
thinnest
section
of the shoe
and
lining. If
the
assembly has worn
to a thickness of
0.230 inch Girling
.190
P.B.R.
(shoe and lining
together)
or 0.030 inch
(lining material only)
at any one
of three measuring
locations
or
if
there is
more than
0.125 taper from end to
end or
if
lining shows
evidence
of
brake fluid
contamination, replace all (4) shoe
and lining
assemblies on both
front
wheels.
3.
Check the
caliper to spindle
attaching bolts torque. Torque them
to specification, if required.
4. To check
rotor
runout, first
eliminate the wheel bearing end play
by tightening the adjusting nut.
After tightening the nut, check to see
that the rotor can
still
be rotated.
S.
·
Clamp a dial indicator
to
the
caliper housing so that the stylus
contacts the rotor at a point approxi-
mately 1 inch from the outer edge.
Rotate the rotor and take an indicator
reading. If the reading exceeds 0. 003
inch total lateral runout on the indi-
cator, replace or· resurface the disc
brake rotor. The following require-
ment must be met when resurfacing
disc brake rotors.
The finished braking surface of the
rotor must be flat and parallel within
0. 007 inch; lateral runout must not
exceed 0. 003 inch total indicator
reading, braking surfaces are to be
80/15 micro inches.
On all models the minimum limit-
*CENTRAUZING THE
PRESSURE DIFFERENTIAL
VALVE. G.T. ONLY.
After a failure
of the
primary
(front brake) orsecondary(rearbrake)
system has been repaired and bled,
the dual-brake warning
light
will
usually continue
to be
illuminated
due
to the pressure differential
valve
remaining
in the
off-center position.
To
centralize
the
pressure differen-
tial valve and turn off the
warning
light
after
a repair operation,
a pres-
sure differential or unbalance
condi-
tion
must be
created in the
opposite
brake system from the one that was
repaired or bled
last.
1.
Turn
the ignition
switch to the
ACC or
ON
position. Loosen
the dif-
ferential
valve
assembly brake
tube
nut at
the outlet
port on
the
opposite
side of
the brake system that was
wheel balanced, repaired and/or bled
last.
Depress the brake pedal slowly
to
build
line
pressure
until the pres-
sure differential valve
is moved to a
centralized position
and the brake
warning light goes out;
then, immed-
iately tighten the outlet
port tube
nut.
2. Check the fluid
level in the mas-
ter cylinder reservoirs
and
flU
them to
within 1/4
inch of the top with the
specified brake
fluid,
if
necessary.
3. Turn
the
ignition
switch to the
OFF
position.
4. Before driving
the
vehicle,
check
the operation of the brakes
and be
sure that a firm
pedal is
obtained.
ing dimension from the inboard
bearing cup to the inboard rotor face
and the minimum
rotor
thickness
I'ALCCJM.I'AIRLANE --~
.0.6 MAX
FIG. 2 -
Disc Brake Rotor
Service Limits
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