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2-6
GROUP 2
-BRAKES
0.002-0.010
inch.
However,
if
the
car
was
stopped
by
a
brake
application
just
prior
to
checking
the
clearance,
the
brakes may
drag
slightly.
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.
5.
Clamp
a
dial
indicator
to the
caliper
housing
so
that the
stylus con
tacts the
rotor at a point
approximate
ly
1
inch from
the
outer edge.
Rotate
the
rotor and
take
an
indicator
read
ing. If
the
reading
exceeds
0.002 inch
total
indicator
runout,
replace
the
rotor.
Do
not
attempt
to
refinish
a
rotor
that
indicates
runout
in
excess
of specification.
When
the
runout check
is finished
be
sure
to
adjust
the
bearings
as
outlined
in
Group
3,
in
order
to
prevent
bearing
failure.
6. Check
the
rotor
for
scoring.
Minor
scores
can
be
removed with a
fine
emery
cloth.
If
the
rotor
is
exces
sively
scored replace
it.
7.
Visually
check
the
caliper.
If it is
cracked or
if
excess
leakage
is
evident,
it
should
be
replaced.
Slight leakage
or
seized pistons
indicate
removal
and
disassembly.
8. If
upon
disassembly
the
caliper
is found
to
be distorted
or
damaged,
or
if
the
cylinder
bores
are scored or
excessively
worn,
replace
the
as
sembly.
The
two
halves
of
the
caliper
as
sembly
should
never
be
separated.
Damage
or
failure
of one requires re
placement of
both
as a unit.
REAR BRAKES
1. Remove
the
wheel
from
the
drum,
and
remove
the
drum
as out
lined in Part
2-2,
Section 2. Wash
all
the
parts except
the
brake
shoes
in
a
cleaning
fluid
and
dry
with
com
pressed air.
2. Brush
all
dust
from
the
carrier
plate and
interior
of
the
brake
drum.
3. Inspect
the
brake
shoes
for
ex
cessive
lining
wear or shoe
damage. If
the
lining
is
worn
to
within
1/32 inch
of
the
rivet
heads
or
if
the
shoes are
damaged,
they
must
be
replaced.
Rep
lace any
lining
that
has been
oil satu
rated.
Replace
the
lining
in
axle sets.
Prior
to
replacement of
the
lining,
the
drum diameter
should
be
checked
to
determine
if
oversize
linings
must
be
installed.
4. Check
the
condition
of
the
brake
shoes,
retracting
springs,
and
drum
for
signs of
overheating.
If
the
shoes
have
a
slight
blue
coloring,
or
if
the
springs
show
a change
in free
length,
indicating
overheating,
replacement of
the
retracting
and
hold
down
springs
is
necessary.
Overheated
springs
lose
their
pull and could cause
the
new
lin
ing
to
wear
prematurely
if
they
are
not replaced.
5. If
the
car
has 30,000
or
more
miles
of
operation
on
the
brake lin
ings,
or signs of
overheating
are pres
ent
when
relining
brakes,
the
wheel
cylinders
should
be disassembled
and
inspected
for
wear
and
dirt in
the
cylinder.
The
cylinder cups and other
parts
contained
in
the
overhaul
kit
should
be
replaced,
thus
avoiding
future
problems.
6. Inspect
all other
brake
parts and
replace
any
that
are
worn
or
da
maged.
7. Inspect
the
brake drums
and,
if
necessary,
refinish.
Refer
to
Part
2-2,
Section 4
for
refinishing.
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