1973 DATSUN B110 Service Repair Manual

BRAKE

Fig
BR
27

Removing
strut

assembly
and
knuckle
arm

installation
bolt

4
Remove
the

caliper
assembly
installation

bolt
and

separate
it

from
the

strut

assembly

Fig
BR
28

Removing
caliper
assembly
instaUation
bolt

Disassembly

I
Remove

mud
and
other
contaminations
from

the

caliper
assembly
before

disassembly

2
Drain

brake
fluid
from
the
wheel

cylinder

3

Loosen
the
air
bleeder
and

depress
tha

pistons
A

and
B
into
the

cylinder
Refer
to
Pad

replacement

4
Secure
the

yoke
in
a
vise
and

tap
the

yoke
head

with
a
hammer
The

cylinder
body
can
then

be

removed
from
the

yoke
When

removing
the

cylinder

body
be
careful
not

to
allow

the

piston
A

coming
out

from
the

cylinder

BR
13
i
c
J

l
l

7

I

0

I

I

i

I

f
1

1

J
t
1

Fig
BR
29

Tapping
yoke
head

5
Remove
the

bias

ring
from
the

piston
A

6

Remove
the

retaining
rings
and

boots

from
the

pistons
A
and
B

J

l

lj

7

fI

II
l

j
B

11
I
Retaining
ring

121
Boot

Fig
BR
30

Cylinder
body
and

piston

7

Depress
and

remove
the

piston
from
the

cylinder

8
Remove
the

pislon
seal

from
the

cylinder

Note
Remove
the

piston
seal

carefully
with

fingers
so

that
the

cylinder
wall
is
not

damaged

9
Remove
the

yoke
spring
and

yoke
bias

spring
from

the

yoke

Inspection
and

repair

Thoroughly
clean
all
disassembled

parIs
and
check

them

for
the

following
items

CHASSIS

Note
When

cleaning
rubber

parts
use
alcohol

or
brake

fluid
If
rubber

parts
are
cleaned
with
mineral
oil

they
will
be
deteriorated

1

Calipers

If
the

cylinder
wall

is

damaged
or
worn

replace
If
the

cylinder
wall
is
rusted
or

foreign
matters
are
accumu

lated
on

the

cylinder
wall

carefully
polish
with
fine

emery

paper
so
that

the

cylinder
wall
is
not

damaged

If
rusted
or

roughened
excessively

replace

2

Pad

See

paragraph

covering
replacement
of

pad

3
Piston

Replace
if

unevenly
worn

damaged
and
or

rusted

Note
The

piston

sliding
surface
is

plated
Thus

do
not

use

emery
paper
although
rusted
or

foreign

matters
are
Slicked
on
the

sliding
surface

4

Seals

Primarily
replace
both

piston
and
dust

seals
whenever

overhauling

Note
The

piston
seal
affects

not

only

leaking
but
also

piston
return
For

this
reason

replace
the

piston

seal

even
if

the

damage
is
minor

S
Rotor

Check
the
rotor
and
if
it

shows
score

excessively
out

of
round

and
so
forth

reconditioning
by

machining
is

required
If

any
abnormal
conditions
such
as

crack

distortion

and
excessive

deflection

replace
the

rotor

Standard
rotor
thickness

9
5
mm
0
3740
in

Limit
of

reconditionillg
rotor
in
thkkn

8
4

mm
0
3307
in

Deflection
of
the
rotor

Below
0
03

mm
0
0012

in
I

I

I

I

ri

U

h

J
r

Fig
BR
1

Measuring
deflection
of
disc

Reassembly

Apply
the
rubber

grease
to

cylinder
bore
and
install

the

piston
seal

2

Insert

the
bias

ring
to

piston
A

so
that
the

roundish

portion
of

bias

ring
comes
to
the

bottom
of

piston

1

ilY
f@

I
I

C

I
1

n
tL

c

ffi

1
1
fJ

u

IZ

@

I
I
Yoke

Chamfer

13
PistonA

I
4
Roundish

portion

Fig
BR
32

Installing
bias

ring
into

piston
A

Note
Be
careful
not

to
confuse
the

piston
A
with
B

BR
14

BRAKE

i
f

F

PISTON
A
PISTON
S

Fig
BR
33

Piston
A
and
B

3

Apply
rubber

grease
lightly
to
the

sliding
portion
of

piston
and
insert
the

piston
into
the

cylinder

Note
When

inserting
the

piston
be
careful
not

to
insert

too
far

4
1
nstaU
the
boot
and

retaining
ring

Fig
BR
34

Installing
boot

5

Install
so
that
the

yoke

groove
of
bias

ring
of

piston

A
coincides
with
the

yoke
groove
of

cylinder

6

Install
so
that
the

projected
portion
of

yoke
spring

faces

to
disc
as

shown
in

Figures
BR
35

and
36

BR
15
YOKE
SPRING

Fig
BR
35
Installation

of

yoke
spring
1

Fig
BR
36
Installation

of
yoke
spring
2

7
Install
the

bias

spring
to

yoke
so
that
the

bias

spring

comes
to
the
air
bleeder

side
of

cylinder

8

Apply
the
brake

grease
to
the

yoke
sliding
portion
of

cylinder

9
With
the

yoke
spring
inserted

to

cylinder
groove

lightly
correct

position
of
the
bias

spring
so
that
the

groove
of
bias

spring
conincides
with

yoke

CHASSIS

Fig
BR
37

Correcting
bias

spring
position

10

Assemble

the

cylinder
body
and

yoke
by

tapping

the

yoke
lightly

11

Apply
the
brake

grease
fully
to

the

yoke
sliding

groove
of

cylinder

12
Install

the
air

bleeder

Reinstallation

Reinstall
the

caliper

assembly
in

reverse

sequence
of

removal

After
the

pad
is

installed

completely
bleed
the

REAR

BRAKE

r

e
hydraulic
line
and

measure
the
rotation

torque
of
disc

Fig
BR
38

Measuring
starting
torque

Starting
torque

9

0

kg
cm
7

80
in

lb

At
the

hub
bolt

1
57

kg
3
45
lb

Tightening
torque

Caliper
assembly
installation
bolt

4
6
to
6

kg
m
33
3

to
44

1
ft

lb

Brake
tube

flare
nut
connected
to

wheel

cylinder

1
5
to
1
8

kg
m
10

8
to
3
0
ft

lb

JJ

i

o

C

EID
I

o

fj

t

Fig
BR
39
Rear
brake

construction

BR
16

BRAKE

Removal
and

disassembly

1
Jack

up
the
rear
side
of
the
vehicle

support
with
a

stand
and
remove
the

wheeL

2
Loosen

the
hand
brake
wire
remove

the
clevis

pin

from
the
rear
wheel

cylinder
lever
and

disconnect
the

hand
brake
wire
Remove
the
return

spring
pull
spring

I
I
k
re

I
I
l

nlinder
lever

I

Fig
BR
40

Removing
hand
brake
wire

3
Remove
the
brake
drum
Remove
the
shoe

retainer

and
return

spring
and

remove
the
brake
shoe

assembly

I
I

I
I
Brake
shoes

Shoe
retainer
Return

spring

Adjuster

Fig
BR
41

Rear
drum

brake

4
Disconnect
the
brake
tube

from
the
wheel

cylinder

5

Remove
the
dust
cover

adjusting
shims

and

plates

The
wheel

cylinder
can
then

be
removed

easily

6
Remove

the

adjuster
assembly
7
Remove
the

flange
bolt
from
the
rear

axle

housing

remove
the
rear
axle

shaft
The
brake
disc
can
then
be

removed

together
with
the
rear

axie
shaft
Refer
to

Section
RA

Fig
BR
42

Removing
brake
disc

Inspection

For
the
rear
brake

inspection
the
instructions

for
front

drum
brake

apply

Return

spring
dimensions

Wire
dia
x
free

length

active

turns
Load
x

length

Cylinder

side
2
0
x
119
2
mm
28

0
0787
x
4

69
in

28
10

6

kg
x
132
7

mm

33

4lb
x
5
22
in

Adjuster

side
2
0
x
69
5

mm
20

0
0787
x
2
736
in

20
8
6

kg
x
76
7

mm

I9
6lb
d

020
in

CYLINDER
SIDE

t
2
0
472

r
lif

r
1
5
58
2

283F

119
2

4
69

FREE

LENGTH

ADJUSTER
SIDE

1210
472

11
0
433

J54J

69
5
2

736

FREE
LENGTH
UNIT
mm
in

Fig
BR
43

BR
17

CHASSIS

Reassembly
and
reinstallation

Reassemble
and

reinstall
the
rear
brake
in

reverse

sequence
of

disassembly
and
removal

nuting
the

follow

ing
matters
When

reassembling
refer
to
the
notes
for

front
drum
brake

1

Measure
the

wheel

cylinder
sliding
resistance
with
the

brake
tube
disconnected
as
shown
in

Figure
BRM
and

make
sure
that
the

sliding
resistance
is
in

range
from
2
to

7

kg
4
409

to
15
432Ib

Note
When

sliding
is

improper
the
brake
shoe
does
not

return

smoothly

2

Tighten
the
brake
disc
installation
bolt

flange
bolt

1
5

to
2
0

kg
m
10
8

to
14
5
ft
lb

3

Tighten
the

adjuster
assembly
installation
bolt
1
6
to

2
2

kg
m
11
6

to
15
9
ft

lb

HAND
BRAKE

4

j
1
I
1

I
Spring
balancer

I
2

I
Wheel

cylinder

Fig
BR
44

Measuring
sliding
resistance

1
Hand
brak
e
lever

2
Cable

3

Clip

4
Lock

plate
5
Tu
m
buckle
Hand
brake

adjuster

6

Cable

7
Cable
8

Hanger
strap

9
Return

spring

10
Cable
shank

11
Hand
brake
lever
cover

Fig
BR
45
Hand
brake
construction

BR
1B

Removal

Loosen
the
turn
buckle

adjusting
nut
and

separate

the
front
cable

from
the
rear

cable

1

Rear
cable

2
Turn
buckle

3
Lock

nut
4
Front
cable

5

Propeller
shaft

Fig
BR
46

Removing
turn
buckle

2

Remove

the
lock

plate
located

immediately
in
front

of
the

turn
buckle
remove
the

clip
in

the

passenger

compartment
side
and

disconnect
the

front
cable

3
Remove

the
hand
brake

lever
cover

Remove
the

lever

assembly
with
the

front
cable
connected

toward
the

passenger
compartment
side

1

I
Front
cable

2
Cover

I
3
Hand
brake
lever

Fig
BR
47

Removing
hand
brake
lever

4

Remove
the

hanger
strap
installation
bolt
withdraw

the

lock

plate
from
the
axle

housing
brncket
unit
and

disconnect
the
rear
cable
BRAKE

I
1

I
Hanger
strap
installation
bolt

r
2

I
Lock

plate

Fig
BR
48

Disconnecting
Tear
cable

from

rear
axle

housing

5
Loosen
the

hanger
slrap
unit
nut
and

separate
the

parts
into
nut

hanger

strap
washer
and
bracket

Discon

nect
the
wheel

cylinder
lever

side
brake
cable

r
v

I
j

1
r

1fil

lt

J

l

1
1

I

c
2

1
Dust

cover

2

Hanger

strap
washer

3
Bracket
4

Hanger
strap

5

Hanger
strap
instal

lation
bolt

Fig
BR
49

Hanger
strap
mounted
on
rear
axle

housing

Note

Do
not

remove
the
dust

cover
from

the
cable
but

leave
it
installed
on
the
cable

Inspection

Check
the

cable
for

damage
and
other

defective

conditions
and

replace
if

required

2

Replace
if

sliding

part
is
worn

excessively

3
Make
sure
that
the
hand

brake
lever
can
be

operated

smoothly
and
that
the
ratchet

pawl
and
teeth
are
not

wom

unusually
or

damaged

BR
19

CHASSIS

4

With
the

hand
brake
lever

pulled
depress
the

push
button
and
make
sure
that
the

pawl
disengages
the

teeth
when
the

push
button
is

depressed
5

to
6
mm

0

1969
to
0

2362
in

completely

5

Make
sure
that
the
cable
dust
cover
is
not

damaged

or

warped

Reinstallation

Reinstall
the
hand
brake
in

reverse

sequence
of

removal

noting
the

following
matters

Be

careful
not
to

damage
or
twist

the
dust

cover

2

Tighten
the

hanger
strap
and
the

cable

connecting

nut
to

0
8
to
1
0

kg
m

5
8
to
7
2
ft
1b

3
When

adjusting
rear
brake
shoe

clearance
be
sure
to

loosen

the
inner
cable

sufficiently

4

Grease
the

sliding

parts
with
multi

purpose
grease

MIL
G
2108
or

G
10924

AD
JUSTMENT

Brake
shoe
clearance

Front
drum
brake

Jack

up
the
vehicle
and

remove
the
wheeL

2
With
the

brake
drum
installed

tighten
the

cam

adjusting
stud
clockwise

up
to
such
an
extent
that
the

brake
shoe
comes
into

contact
with
the
brake
drum

by

applying
your
hand

and
tool
from
reverse
side
of

the

brake
disc

Fig
BR
50

Adjusting
front
brake
shoe

clearance
Turn
the
cam

adjusting
5
ud

counterclockwise

up
to

such
an
extent
that
the
brake
shoe
is

separated
slightly

from
the
brake
drum

4
Turn
the
brake
drum

and
if

the
brake

shoe

interferes
the
brake
drum

readjust
the
clearance
In

addition

depress
the

brake

pedal
and
make
sure
that

the

brake

operates
effectively
and

correctly

Front

disc
brake

Ordinarily
adjustment
is
not

required
because
clear

ance
between

pad
and
rotor
is

adjusted
automatically

by
elasticity
of
the

piston
seal

Rear

brake

Jack

up
the
vehicle
and
remove
the
wheeL

2

Appiying
your
hand
and
tool
from
reverse
side
of

the

brake
disc

tighten
the

brake

adjuster
wedge

clockwise

up
to

such
an
extent
that
the
brake
shoe

comes
into

contact
with
the

brake
drum

Fig
BR
51

Adjusting
rear
brake
shoe
clearance

3
Return
the

adjuster
wedge
properly
so
that
the

brake
shoe
is

separated
from
the
brake
drum

slightly

4
Turn
the

brake
drum
and
if

the
brake
shoe

interferes
the

brake
drum

readjust
In
addition
de

press
the
brake

pedal
and
make
sure
that
the
brake

operates
effectively
and

correctly

BR
20