wiper fluid DATSUN 610 1969 Workshop Manual

Page 104 of 171


brake
shoe
is
in
contact
with
the
drum
The

adjuster
must
be

turned
from

the
rear
of

the

backplate
and
the
drum
turned

by

hand

When
the
shoe
contacts
the
drum
turn
the

adjuster
in

the

opposite
direction
until
the

shoe
is

just
clear
and
the
drum

can

be
rotated

freely
by
hand

Depress
the
brake

pedal
and
make
sure
that
the
brakes

operate
correctly
The

adjusters
must

be
released

slightly
if

the

brake
shoe
binds

FRONT
DISC
BRAKE
Friction

pads
Fig
L
14

The
disc
brakes
are
self

adjusting
but
the
friction

pads

should
be
checked
for
wear

every
5
000
km
3
000
miles
and

replaced
if
the
thickness
of

the
friction

lining
on

any

pad
is
less

than
1
0mm
0
004
in
In
effect
this
means
that
renewal
is

necessary
when
the
total
thickness
of

pad
and

lining
is
less
than

8
4mm
0
24
in

To

replace
the
friction

pads
proceed
as

follows

Siphon

out
some
of
the
fluid
in
the
master

cylinder
reservoir
Jack

up

the
front
of
the
vehicle
and
remove

the
road
wheel

Remove
the
anti
rattle

clip
from
the

calliper
plate
Fig
L
lS

Unhook
the

hanger
spring
and
withdraw
the
brake

pads

and
shims

Fig
L
17

It
should
be
noted
that
the
friction

pads
must
be

replaced

as
a
set
and
renewed
at
both
sides
of
the
vehicle
otherwise
the

braking
action
will
be
uneven

Oean
the

calliper
and

pad
at

their
installation

positions

Press
the

pistons
into
the

calliper
bores
so
that
the
new
friction

Pads
can
be
installed
The

pistons
can

be
installed

by
applying

light

pressure
as
shown
in

Fig
L

16
but
care
must

be
taken
to

avoid

pushing
them
too
far
or
the

groove
of
the

piston
will

damage
the
seal

If
the

pistons
are

pushed
down

excessively
it
will
be

necessary
to
dismantle
the

calliper
as

described
under
the

appropriate
heading

Assemble
the

anti

squeal
shims
to
the
friction

pads
with

the
arrow
mark
on
the
shims

pointing
in
the
direction
of

forward
disc
rotation

Refit
the

pads
and

retaining
pins
and
assemble
the
coil

spring
to

the

retaining
pin
furthest
away
from

the
air
bleed
screw

After

installing
the
new

pads
and
shims

depress
the
brake

pedal
several
times
to

reposition
the
pistons
in
the

calliper

O1eck
the
fluid
level

in
the
master

cylinder
reservoir
and
refill

to
the
correct
level

FRONT
DISC

BRAKE
Removal
and

Dismantling

1
Jack

up
the
front
of

the
vehicle
remove
the
road
wheel

and
take
out

the
friction

pads

2
Disconnect
the
brake
hose
from
the
brake

tube
and

plug

the

opened
end
to

prevent
the
loss
of
fluid
3
Remove
the
bolts

securing
the
brake

calliper
to

the

knuckle

flange
and
remove
the

calliper
assembly
Fig
L
IS

4
Remove
the
hub
nut

and
withdraw
the
hub
and
disc

To
dismantle
the
calliper
remove
the
anti
rattle

clip
and

withdraw
the
brake

pads
Remove
the
tension

springs
and

pull

the
cylinder
out
of
the

calliper
Blow
out

the
piston
with
com

pressed
air

applied
at

the
brake
hose
connection

Oean
the

components
in
brake
fluid
and
examine
them

for

signs
of
wear
or

damage

The

cylinder
walls
can

be
carefully
polished
with
fine

emery
cloth
if

they
are
rusted
or
contaminated
If
the

parts

are

excessively
corroded

they
should
be
renewed

Replace
the

pistons
if

they
are

unevenly
worn

damaged

or
rusted
The
sliding
surface
of
the

piston
is

plated
and
no

attempt
should
be
made
to

use

emery
cloth
or
similar
abrasives

for

cleaning
purposes

Check
the
thickness
of
the
friction
pads
as

previously

described
and
replace
them
if

necessary
Renew
the

piston
seals

and
the
dust
covers

O1eck
the
brake
disc
for

scoring
and
out
of
round
The

standard
disc
thickness
is
10
Omm
0
0394
in
and
must
not

be

reground
below
8
4mm
0
3307
in

Check
the
disc
run
out
with
a
dial

gauge
as
shown
in

Fig

L
19
Position
the
gauge
near
the
outer
diameter
and
check
that

the
run
out
does
not

exceed
0
06mm
0
0024
in

FRONT
BRAKE
DISC
Assembly
and
Installation

Rinse
the

cylinder
bore
with
brake
fluid
and
fit
the

piston

seal
into
the

cylinder

groove
Fig
L
20
Fit
the
wiper
seal
and

lightly
grease
the
bore
of
the

cylinder
Clean
the
brake
disc

and
fit
it
to
the
hub
Install
the
hub
to
the
knuckle

spindle

Carefully
insert
the

piston
into
the

cylinder
until
the
face

of
the

piston
is
almost
flush
with

the

wiper
seal
retainer
The

relieved

part
of
the

piston
should
face
the

piston
pin

Fit
the
cylinder
to
the

calliper
plate
and
secure
in

position

with
the
two
torsion

springs
Assemble
the
hold
down
pin

the

spring
washer
and
the
nut
to

the

support
bracket
Secure

the
nut

with
a
cotter

pin

Assemble
the

calliper
to

the
mounting
bracket

using
the

pivot
pin
washer

spring
washer
and
nut

Tighten
the
nut
and

secure
with
a
cotter

pin
Hook
the
hold
down
bracket
to
the

top
of
the

mounting
bracket
and
turn
the

calliper
plate
to

make

sure

that
it
can
slide

smoothly
Fit
the

calliper
assembly
to
the

knuckle

flange

Fit
a
shim
to
the
inner

pad
and
insert
the

pad
Draw
the

calliper
towards
the
chassis
and
insert
the
lower
cuts
on

the

pad

into
the

mounting
bracket
and

push
the

pad
in
until
it
contacts

the

piston
Move
the

calliper
away
from
the
chassis
and
insert

the

upper
cuts
Centre
the
indentation
of

the
outer

pad
in
the

calliper
plate
Fit
the
anti
rattle

clip
Fig
L
14

103

Page 168 of 171


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