1973 DATSUN B110 brake

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

BRAKE

Brake

pedal
height

I

Fl
I

Jl

BRAKE
MASTER

CYllN

ADJU
SHI

1

I
195mm
001971011

THICKNESSIO
8
mm

00315
Inl

116mm
00630In
TOP
LAMP
SWrTCH

r

b

O

ZOlTlI
I

A
12
n

Y
1
O

09

ttr
i
l

Fig
BR
52
Brake

pedal
adjustment

1
Loosen
the

stopper
up
to
such

extent
that
the
brake

pedal
stopper
is

separated
from
the

pedal
arm

2
Measure

height
of
the
brake

pedal
head
from
the

dash

panel
and

adjust
the

adjusting
shim
between
the

brake
master

cylinder
and
dash

panel
so
that

height
is

143
5
mm
5
65
in

Adjusting
shim
thickness

for
selection

0
5
mm
0

0197
in

0
8
mm
0
0315
in

1
6
mm
0
0630
in

Note
When

adjusting
be
sure
to

use

adjusting
shims

having
same
thickness
for

upper
and
lower
brake

master

cylinder
installation
bolts

3

Upon
completion
of

adjusting
shim

adjustment

tighten
the

stopper
down
to
such
an

extent
that

height
of

the

pedal
head
is
141
5

t2
mm
5
57

to
0787
in

and

tighten
the
lock

nut

securely

4
Free
travel
of
the
brake

pedal
is
5
to
15
mm

0
197

to
0
591
in
and
the
stroke
is
120
mm

4
72

in
Hand
brake

Turn
the
turn
buckle

properly
and

adjust
hand
brake

lever

operating
stroke

correctly
so
that

operating
stroke
is

78
5
mm
3

091
in
6
notches

at

operating
force

of
11

to
15

kg
24
3
to
33
1
1b

Upon
completion
of

adjustment
be

sure
to

tighten
the

lock
nut

I

I
Rear
cable

2
Turn
buckle

3
Lock
nut
1451
Front
cable

Propeller
shaft

Fig
BR
53

Adjusting
turn

buckle

BR
21

CHASSIS

2

Upon

completion
of

the

adjustment
release
the
hand

brake

lever
and
make
sure
that
the
rear

wheels
are

not

braked

Normal
stroke

78
5

mm
3

091
in
6
notches

Limited
stroke

136
0

mm
5
35
in
10
notches

The
term
Stroke
means

height
from
the

standard

position
220

mm
8
7
in

above
the
hand

brake
lever

fulcrum

Note

Readjust
hand
brake
stroke
when
it
reaches
the

limited
stroke
136
mm
5
35
inl
10
notches

Bleeding
hydraulic

system

Bleeding
the

hydraulic
brake

system
deserves

much

attention
as
it
is

an
essential

factor
for

regular
service

brake

operation

As
a
matter
of

fact

during
the

brake
service
air
is

likely
to

creep
into
the
circuit
with

the
result
that

the

fluid
action
is

altered
and
the
brake

pedal
becomes

spongy

at
the
travel
end

Bleeding
should
be
carried
out
at
first
with

the
masler

cylinder
then
from
the

longest
line
from
the

master

cylinder
and
then
finish

up
with
the
shortest

Note

Always
clear

away
any
dirt
around
master

cylinder

reservoir

cover
before

removing
cover
for

any

reason
Never

depress

pedal
while

brake
drums
are

removed
unless
bleeder

valve
is

open

Top
up
the
reservoir

master

cylinder
with
fluid

of
the

recommended

type

2

Thoroughly
wipe
the
bleeder

screw
and
from

any

mud
or

dust

present
so
that
the

outlet
hole
is

free
from

foreign
matter

3

Attach
a

vinyl
hose

to
the
wheel

cylinder
bleeder

screw

Dip
the
end
of
the

vinyl
hose
in
a

jar
con

taining

some
brake
fluid

BR

22
I
I

I
Air
bleeder

I
2

I
Vinyl
hose

Fig
BR
54

Connecting
vinyl
hose
to
air
bleeder
rear

4

Depress
the

brake

pedal
two
to

three
times
and

keep

the

pedal
fully

depressed

5

With
the
brake

pedal
fully
depressed
loosen
the

bleeder

screw
exhaust
air

and

retighten
the

bleeder
screw

quickly

6
Return
the
brake

pedal
slowly

7

Repeat
the

operations
4

through
6

above
Air

will

no

longer
come
out

from
the
bleeder

screw
but

brake

fluid
comes
out
When
air

still
exists
in
brake
fluid
it

appears
white
due

to
air

bubble

8

Conduct
air

bleeding
on
other
wheel

cylinders
in

the

same
manner

Note

a
Check
the
reservoir
for
fluid
level

during
bleed

ing
operation

b
Fluid

withdrawn
in
the

bleeding
operation

should

not
be
used

again
for

refilling

c
When
the

master

cylinder
is
disassembled

or

replaced
conduct
air

bleeding
on
the
wheel

cyl

inder
which

is
located
most
near
the
master

cylinder

d

Ordinarily
air

bleeding
is

performed
in
the

following
sequence

Rear

left
Rear

right
Front
left

Front

right

e
Do

not
retum
the
brake

pedal
before

re

tightening
the
bleeder

screw

BRAKE

SERVICE
DATA
AND
SPECIFICATIONS

Brake

pedal

Pedal
free

height

Full

stroke
of

pedal
head

Master

cylinder
mm
in

mm
in
141
5
t2
5
57
to
0787

120
4
72

17
5
11

16

Inner

diameter
of
master

cylinder
mm
in

Allowable
maximum
clearance
between

cylinder
and

piston
mm
in

Wheel

cylinder

Inner
diameter
of
wheel
cylinder

Front
drum

disc

Rear

front
disc

Allowable
maximum

clearance
between

cylinder
and

piston

Brake
drum
and
rotor
disc

Drum

brake
inner
diameter

Rotor

disc
outer
diameter

Rotor
thickness

Drum
inside
out
of
roundness

Max

allowable
drum

inner

diameter

Run
out
of
the

rotor

Max

allowable
rotor

thickness

Lining
dimensions

Front
drum
brake

Lining
width

x
thickness
x

length

Total

braking
area
0
13
0

0051

mm
in

mm
in

mm
in

mm
in
20
6

13
16

48
1
1

894

20

6
13

16

1746
11
16

mm
in
0
18
0

0071

mm
in

mm
in

mm
in

mm
in
203
2
8
00

212
5
837

9
5

03740

Below
0
Q2
0

0008

mm
in

mm
in
204
5

8
051

Below
0
03
0

0012

mm
in
8
4
03307

mm
in

cm2

sq
in
35
x
4
8
x
195
1
378
x
0
1890
x
7
68

273
423

BR

2J