1973 DATSUN B110 check oil

7

Remove
the

brake
disc

installation
bolt
and
remove

the
brake
disc
from
the

spindle

8
Disassemble

the
wheel

cylinders

Inspection

l
Drums

If

they
show

score
excessive
out
of

round

and
so
forth

reconditioning
by
machining
is

required

Brake
drum
inner

diameter

203
2

mm
8
00

in

Drum

inside
out
of
roundness

Below
0

02
mm
0
0008
in

Max

allowable
drum

inner
diameter

204
5

mm
8
051
in

2

Linings
If
brake
shoe

linings
are

incomp1etedly

seated

soiled
or

greasy
or
deteriorated
due

to
excessive

heating
repair
or

replace
them

If
the

thickness
of
the

lining
is
less

than
1
5

mm
0
0591
in

replace
it

Note
a
If
oil
or

grease
is
found
on

linings
clean

thoroughly
with
carbon
tetrachloride
or

gasoline

b
After

installing
and

bonding
lining
grind
the

lining
face

to
a
diameter

equal
to
the
brake
drum

3

Check
the

adjusting
cams

for
their
smooth

operation

4
Return

springs
If

they
are

considerably
weak

replace
them

Return

spring
dimension

Wire
diameter

x
free

length
turns

3
2

x
118

mm
20
5

0
1260
x
4

65
in

20
5

Load
x

length

55

kg
I21
lb
x
127
1

mm
5

00
in

13
4
0
528

ilL
rnv

0
t
6

hl
03

118

4
65

FREE

LENGTH

UNIT
mm

in

Fig
BR
J
7
Return

spring
BRAKE

5

Check
the
brake
disc

for
distortion

6
Check

the
bore
of
the

wheel

cylinder
for
wear

sign

of
rust
and

damage

If
clearance
between

the

cylinder
and
the

piston

exceeds
0
15

mm
0
0059

in

replace
them

Fig
BR
J
8

Sectional
view

of
front
wheel

cylinder

7
When
the

wheel

cylinder
is

overhauled
it
is

recom

mended
that

cups
be

replaced
even
if

apparently
they
are

in

satisfactory
conditions

Cups
must
be

replaced
if

deformed
due
to

damage
crack
corrosion

smelling

andf
or

aging

Reassembly
and
reinstallation

The
rear

brake
is

reassembled
and
reinstalled
in
reverse

sequence
of

disassembly
and
removal
However
note
the

following
matters

When

assembling
the
wheel

cylinder
be

sure
to

apply

rubber

grease
to
the

piston

cup
and

other
rubber

parts

slightly

2
When

installing
the
wheel

cylinder
to
the
brake

disc

apply
brake

grease
to
the

cylinder
disc
and

adjusting

plate
sliding
surfaces
and
to
the
wheel

cylinder
lever

fulcrum

portion

sufficiently
so
that
the
wheel

cylinder

slides

smoothly

BR
9

BRAKE

CYLINDER
SIDE

PISTON
SIDE

COMPR
ESSION

DECOMPRESSION

Movement

exceeding
the

elastic

displacement
is

released
with

slipping
on

the
seal
surface
Returns
in
elastic

displacement
of

the

seal

Fig
BR
21
Piston

seal
automatic

adjusting
operation

Brake

pad

Replacement

1
Jack

up
front
unit
of

the
vehicle
and
remove
lhe

front

wheeL

2
Remove

clip
from
the

retaining
pin
and

supporting

the
brake

pad
remove
the

retaining
pin
and
coil

spring

I

I
Brake

pad

2

Retaining
pin

I
31
Clip

Fig
BR
22

Removing
retaining
pin

3
Unhook

the

hanger
spring
and
withdraw
the
brake

pad
and
shim
with
a

pair
of

pliers

BR
ll
Fig
HR
2

Withdrawing
brake

pad
and
shim

Note
When
the
brake

pad
is
removed
do
not

depress
the

brake

pedal
or
otherwise
the

piston
will
come
out

Inspection

Clearance
between
the

brake

pad
and
rotor
is

adjusted

automatically
Check
the
brake

pad
for
wear

after
the

first
10
000
km
6
000

miles

driving
and

every
5
000

km
3
000

miles
thereafter

1

Clean
the
brake

pad
with
carbon
tetrachloride
or

gasoline

2
When
oil
and
or

grease
is

heavily
sticked
on
the

pad

or
when
deteriorated
or
deformed
due
to

overheating

replace
the

pad
with

a
new
one

3
When
thickness
of
the

friction
material

pad
is
less

than
1
6
mm
0
0630
in

replace

Replace
when
total

pad
thickness
is

less
than
6
1
mm

0
2402
in

Note
Replace

pads
as
a
set

Replacement
at

only
one

position

may
cause
uneven
brake
effect
It
is

recommended
that
rotation
of

pads
be
made

periodically

4
Check
the
rotor
Refer
to
Rotor

inspection

Reinstallation

1
Clean
the

calipers
and

piston
pad
installing
parts

Note
Do
not
use
mineral
oil
Be
careful
not
to

apply
oil

on
the
rotor

2

Depress
the

piston
into
the

cylinder
so
that
new

pad

can
be
installed

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

Pedal

yields
under

slight

pressure

Excessive

pedal

travel

All

brakes

drag

One
brake

drags

Unbalanced
brakes
BRAKE

Use
of
a
brake
fluid
with

a

boiling
point

which
is
too
low

Reservoir

filler

cap
ven
t
hole

clogged
This

promotes
a
vacuum
in
master

cylinder
that

sucks
in
air

through
rear
seal

Deteriorated
check
valve

External

leaks

Master

cylinder
leaks

through
primary
cap

System
has

not
been
bled

Improperly
adjusted
clearance

Fluid
level
in

master

cylinder
is
too
low

Thermal

expansion
of
drums
due
to

over

heating

Insufficient
shoe
tlrdrum

clearance

Weak
shoe

return

springs

Brake
shoe

return
no
free

travel

Seized
master

cylinder
piston

Loose
or

damaged
wheel

bearings

Weak
broken
or

unhooked
brake

shoe

return

springs

Insufficient
clearance
between
brake
shoe

and
drum

Grease
or
oil
on

linings

Seized

piston
in
wheel

cylinder

Tires

improperly
inflated

Loose
wheel

bearing

BR
25
Change
with
the

specified
brake

fluid
and

bleed

system

Clean
reservoir
filler

cap
and
bleed
the

system

Fit
a

new
check

valve
and
bleed
the

system

Check
master

cylinder
piping
and

wheel

cylinder
for
leaks
and
make

necessary
re

pairs

Overhaul
master

cylinder

Bleed

the

system

Adjust
shoe

to
drum

clearance

Full

up
with

specified
brake

fluid

Bleed
the

system
if

required

Allow
drums

to
cool
off
Check
brake

shoe

linings
and
drums

Replace
damaged

parts

Adjust
clearance

Replace
the

springs

Adjust
pedal
height

Service
the

master

cylinder
replace
the

piston
and
bleed

the

system

Adjust
or

replace
wheel

bearings

Replace
spring

Adjust
brakes

Clean
brake
mechanism

replace
lining
and

correct
cause
of

grease
or

oil

getting
on

lining

Service
the
wheel

cylinder
and

bleed
the

system

Inflate
tires

to
correct

pressure

Adjust
wheel

bearing

CHASSIS

Front

suspension
faulty

Thoroughly
check
and

adjust
all

front
sus

pension
components

Excessive

pedal

pressure
required

poor
brakes
Grease
mud
or
water
on

linings
Remove
drums

Clean
and

dry
linings
or

replace

Full
area
of

linings
not

contacting
drums

Replace
shoes

Scored
brake

drums
Reface

drums
and
install
new

linings

Brake

chatter

squeak
or

squeal
Dust

on
drums
or
oil

soiled

linings
Remove

and
clean
drums

thoroughly

Eliminate
oil

leak

Weak
shoe
return

springs
Check

springs
and

replace
as

required

Drum
out

of
round
Turn
drums

on
lathe

Worn

linings
Replace
linings

SERVICE
JOURNAL

OR
BULLETIN

REFERENCE

DATE
JOURNAL

or

BULLETIN
No
PAGE
No

SUBJECT

BR

26

STEERING

DESCRIPTION

The

steering
system
consists

of

recirculating
ball

type

gear
box

and

parallelogram
linkage

These

systems
give
good

response
light
handling
and

utmost
durability
Moreover
the

steering
linkage
is

equipped
with
a
torsion

rubber

system
idler
arm
which

absorbs
shock
from
the

wheel

Check
the
lubricant
of

gear
box

every
10
000

km
6
000
miles
and

replenish
recommended
oil
as

required

The

steering
linkage
should
be

greased
up
with
wheel

bearing
grease
every
50
000
km
30
000
miles

All

necessary
service

procedures
for
the

steering
lock

system
are
described
in
the

BODY
ELECTRICAL

SECTION
of
this
manual
and
therefore
no
instruction
is

given
here

STEERING

CONTENTS

REMOVAL

DISASSEMBL
Y

Ball
nut

assembly
ST
2

ST
3

ST

4
INSPECTION
AND
REPAIR

ASSEMBL
Y
AND
ADJUSTMENT

INSTALLATION
ST
4

ST
5

ST
7

1

Steering
gear
housing

2
Shaft

steering
sector

3
Screw

adjusting
roller
shaft
4
Cover

sector
shaft

5
Shim
worm

bearing

6

Comp
jacket
column
7

Assembly
column

steering

8

Assembly
bearing
steering
worm

9

Assembly
nut
ball

Fig
ST
1

Steering
gear
components

ST
1

CHASSIS

Note
Be
careful
not
to
allow
the
ball

nut
running
down

to
either
end
of

the
worm

The
ends
of
the
ball

guides
will

be

damaged
if

the
nut
is
allowed
to

rotate
until

stopped
at
the
end
of

the
worm

5
Pull
out
the
column

assembly
from
the
column

jacket

6
Remove
the

sector
shaft
oil
seal

7
Take
out
the

rear

bearing
outer
race
from
the

column

jacket
using
a

puller

8

Take
out
the

bearing
inner

races
from
the
front
and

rear

worm

bearings

9
Remove
the

column
shaft

bearing

Ball
nut

assembly

If
the
ball
nut

assembly
or

column
is

defective

recommend
the
column

assembly
to
be

replaced
because

assembly
and

adjustment
of
the
column

assembly
are

very

difficult

However

for

your
reference

disassembly
assembly

and

adjustment
are
described
as
follows

Disassembly

L
Remove
the

damp
of
the
ball

guide
lube
and

withdraw
the
ball

guide
tube
out
of
ball
nut

2
Turn
the

nut

upside
down
and

rotate
the

column

back
and
forth
until
all

38
balls
are

dropped
out
of

ball

nut
With
the
balls
removed
the
nul
can
be

pulled

endwise
off
the
column

Note
Be
careful
not
to
lose
the
balls
and
make
sure
that

total
number
of
balls
is
60
balls
7
32
in
dia

l

Inspection

Check
ball

guide
tubes
for

damage
at
the
ends

where

they
pick
up
the

balls
from
the
helical

path
Replace

guide
tubes
if

damaged
Assembly
and

adjustment

1
Assembie
the
ball

nut
on
the

worm
with

the
ball

guide
hole

up

2

Drop
19
balls
into

each
of

two
hoies
on
the

same

side

of
ball

nul

Turn

the
column

gradually
away
from
the

hole

being

filled

Continue
until
all
38
balls
are
installed

Note
I
n
cases
where
the
balls
are

stopped
by
the
end
of

the
column
hold

down
these
balls

already
dropped

into
the
ball

nut
with
the
blunt

end
of

a
clean
rod

or

punch
and
turn

the
column
in
the
reverse

direction
a
few
turns

The

filling
of
the
circuit
can
then
be
continued

It

may
be
o

ry
to
work
the
column
back
and

forth

holding
the
balls
down
first
in

one
hole
then

the
other
to
close

up
the

space
between
the
balls

and
fill
the
circuit

completely
and

solidly

3

Place

remammg
22
balls

in
halves
of
ball

guide

tubes
11
each
of

two
halves

4

Close
this

half
of

guide
tube
with
the
other

half

Hold
the

two
halves

together
and

plug
each

open
end

with
vaseline
so
that
balls
will

not

drop
out
while

installing

5

Push
the

guide
tubes
into
the

guide
holes
of
the

ball

nut

6

Assemble
the

ball

guide
tube

clamp
to
the

ball
nut

INSPECTION
AND
REPAIR

I
Measure
axial

clearance
between
the
steel
balls
and

ball

nut
and
if
the

clearance
is

more
than
0
08
mm

0
0031

in

replace
the

parts
as
a

complete
unit

2

Inspect

gear
teeth
of
sector
shaft
and
ball

nut
for

wear

or

damage
If
there
is

any
sign
of

damage
replace

3

Inspect
bearings
for
wear
or

chip
Replace
bearings
as

required

4

Inspect
the
serration
of
sector

shaft
and

colunm
for

wear

ST
4

I

CHASSIS

4

Adjust
the

preload
of
the
worm

bearing
by
selecting

the
thickness

of
he

worm

bearing
shim
five
kinds
0
05

to
0
20

mm
0
0020
to
0

0079
in
so
that
the
initial

torque
of
the

steering
wheel
is
2
0

to
5
0

kg
cm
27
8

to

694
in
oz
without
sector
shaft

J

Fig
ST
10

Measuring
initial

tunring
torque

Note

Apply
oil
on
the
worm

bearings
The

turning

torque
wheel
in
motion
should
be
100
to
250

gr

13
5
to
8

8
oz
at
20
em
7
874
in
radius
of
the

steering
wheel
As
to
the
standard
number
of
worm

bearing
shims
refer
to
the

following
table

Worm

bearing
shim

Thickness
mm
in

0
05
0
0020

0
07
0
0028

0
08
0
0031

0
10
0
0039

0
20
0
0079

5

Sector
shaft
lash

adjuster
end
clearance
Assemble

lash

adjuster
with

shim
in

the
slot
of
the

sector
shaft
end

Measure

clearance
0
05
mm
0

0020
in

To
obtain
this
clearance

five
various

thickness
shims

are
available
Adjusting
screw
shim

Thickness
mm

in

1
515
to
1
535
0
0596

to
0
0604

1
545

to
1
565
0

0608
to
0
0616

1
575
to
1
595
0
0620
to
0

0628

1

605
to
1

625
0
0632
to
0

0640

1
63510
1
655

0
0644
to
0
0652

Fig
ST
J
J

Checking
lash

adjuster
end
clearance

6
Assemble
the
sector

shaft
into

the

gear
housing

I
Rotate

worm

column

by
hand
unlil

ball
nut
is
in
the

center
of
its
travel
so
that
the

center
tooth

of

sector
shaft

enters
into

the
center

tooth

space
of

ball

nut

2

With

new

gasket
in

place
push
the

sector
shaft

cover
with
sector

shaft
in

place

After

making
sure
that

there
is
some

lash
between
the

rack
and

sector
teeth

tighten
side
cover

bolts

Tightening
torque
is
I
7
to
2

8

kg
m

I2
3
to
20
2

ft

lb

Note

Apply
oil
on
the
sector

shaft

3

Lock
the

adjust
screw
with

the

adjusting
screw
nut

temporarily

4
Move

the
sector
shaft

several
times
from
the

side
of

the

gear
arm
and
make

sure
it

turns

smoothly

5
Connect
the

gear
arm
to

the
sector
shaft
When

fitting
the

gear
arm

the

aligning
marks
on
the

gear
arm

and
sector

shaft
should
be

matched

correctly

ST

6