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2-22
and secure the rivets,
working
alter-
nately towards each end.
Replace-
ment linings are ground and no
further grinding is required.
4. Check the clearance between
the shoe and lining. The lining
must
seat tightly against the shoe
with
not
more than
0. 008
inch
clearance
between
any two rivets.
DISC BRAKE CALIPER GIRLING
OVERHAUL AND BRAKE
SHOE REPLACEMENT
DISASSEMBL
\'
1. Remove
the
caliper
from the
vehicle as
detailed
on Pages 2-18.
2.
Remove
the inner brake shoe
hold down clips from the anchor
plate,
remove the
locating
pin insu-
lators
from the anchor
plate
and re-
move the inboard
brake
shoe and
lining assembly
(Fig.
11).
3. Place a small screw-driver
under the outer brake shoe
retaining
clip tang and lift away from
the pin
groove
and slide the
clip from the
brake
shoe retaining pin.
Repeat
the
operation
to remove the
other
shoe
retaining
clip
Remove
the
brake shoe.
4. Apply
air
pressure
to the fluid
port in the caliper
with
a tubber
tipped
nozzle to remove the
piston.
Place
a cloth over the piston
before
applying air
pressure
to
prevent
dam-
age to the piston. If
the piston
is
seized and cannot be forced from the
caliper,
tap lightly
around the piston
while applying
air pressure. Care
should be
taken
because the
piston can develop considerable
force due
to
pressure build up.
5.
Remove
the dust boot from
the caliper
assembly.
6. Remove
the rubber piston seal
from the cylinder and discard it.
CU:ANJN(;
ANll
INSPF.CTION
Clean all metal parts with de-
natured alcohol or a suitable solvent.
Use clean,
dry, compressed
air to
clean out and
dry
the grooves and
passage
ways.
Be sure that the
caliper
bore and component parts are com-
pletely free
of
any foreign
material.
Check the cylinder bore and piston
for
damage
or
excessive
wear. Re-
place the piston if it is
pitted,
scored,
or the chrome
plating is
worn off.
ASSEMBLY
1.
Apply
a film of clean
brake
fluid to
the new caliper piston
seal
and install it in the
cylinder bore. Be
sure the seal does not become twisted
and that it is seated fully in the
groove.
GROUP
2-BRAKES
PISTON RETRACTING TOOL GIRLING
D
Weld Nut on tame
side of Brake Shoe
as
Tangs
Drill 33/64 dia.
in Brake Shoe
Used Outer
Brake Shoe
i
-13 Nut
Weld' securely
.
to
Brake Shoe
i
-13
Nut
Weld securely
to Threaded ·Rod
D
IF necessary a similar tool may
be
made for P.B.R. Caliper from discarded
brake shoe.
2.
Install a new dust boot by
setting
the
flange squarely
in
the
outer groove of the caliper bore.
3. Coat the
piston with clean
Motorcraft Brake
Fluid and insert
into the
cylinder
bore.
A piston
retracting tool
can be
fabricated
from
a discarded outer
brake
shoe and
a threaded
rod. See
diagram
for details.
4. Install
the
piston retracting
tool in the
caliper with the
brake shoe
lances
positioned
in the slots in the
caliper
outer legs and retract the
piston.
NOTE:
When
using
the piston re-
tracting
tool,
turn the threaded
rod
one half
turn at
a
time and pause to
permit
the piston to
move
in the seal.
Reduce
the time interval as the
piston
nears the bottom of the
cylinder
bore
to ensure
bottoming of the piston.
If
the
piston
is
not fully bottomed, the
spacing
between
the linings is in-
sufficient
to
permit
the
brake
shoe
and
caliper assembly
to be
mounted
over the rotor.
5.
Position
the new outer brake
shoe and lining assembly on the
caliper
and install the outer brake
shoe
retaining clips.
Hold the retain-
ing pins in
position
with an Allen
wrench or
bolt while
installing the
retaining
clips.
6. Position
the
caliper assembly
over the rotor with the outer brake
shoe
against
the
rotor braking surface
during
installation in the
anchor plate
to
prevent pinching
the piston
boot
between
the inner brake shoe and
the
piston.
Verify
that the correct
caliper
is
assembled
in the correct anchor plate
as marked during
disassembly.
7. Position
the
new stabilizer
(supplied in the brake
kit). Apply
de-
natured alcohol or
methylated
spirits
on the
locating
pins and attach the
stabilizer
to the caliper.
Be sure the
locating
pins
are free of oil,
grease or dirt. Tighten
the caliper
locating
pins finger
tight.
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