1973 DATSUN B110 steering

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

STEERING

6

Adjust
the
backlash
at

the
neutral

point
by
screwing

the

adjusting
screw
so
that
the
movement
of
the

gear
arm

top
end

radius
7
mm
5

00
in
is
within
0
1
mm

0
0039

in
and
lock

temporarily
by
the
nut

Fig
ST
12

Checking
backlash

Fig
ST

13

Adjusting
backlash
7
Fill

gear
oil
about
0
24
liter

I
2
US

pt
3
8

Imp
pt
into

assembly
through
f1ller
hole
and

install
a

mIer

plug

INSTALLATION

Installation
can

be

accomplished
in

the
reverse
order

of

removal

Pay
attention

to
the

following
points

I
Make

sure
that
the

steering
wheel

moves

smoothly

2

Check
the

alignment
of
the

steering
wheeL

3

Free
travel
of

steering
wheel

should
be
20

to
25
mm

0
787
to
0

984
in

COLLAPSIBLE
STEERING

CONTENTS

DESCRIPTION

STEERING
COLUMN

JACKET

TUBE

STEERING
POST
CLAMP
ST
8

ST
9

ST
10

ST
11
COLUMN
BEARING

DISASSEMBL
Y

INSPECTION

REASSEMBL
Y
ST
12

ST
12

ST
12

ST
13

ST
7

CHASSIS

I
l
I

I

2

fa

r

o

Fig
ST
14

Collapsible
steering

DESCRIPTION

This
column
is

designed
to
be

compressed
under
an

impact
When

an
automobile
is

being
driven
the
forward

movements
of
the

automobile
and
the
driver
constitute
a

form
of

energy
or

force
When
the
automobile
is
involved

in
a

head
on
collision
the

primary
force
forward
move

ment
of
the
car
is

suddenly
halted
while

the

secondary

force
the

driver
continues
in

the
forward
direction
A

severe
collision

generally
involves
these
two
forces

primary
and

secondary
The

secondary
impact
occurs

when
the
driver
thrusts
forward
onto
the

steering
wheel

and
column

The

collapsible
column
is

designed
to
absorb

primary

and

secondary
forces
to
the

extent
that

the

severity
of
the

secondary
impact
is

reduced

thereby
reducing
the
tenden
cy
to
move
rearward
into
the
driver
s

compartment
A

split
second
later
when
the
driver
is
thrown
forward
the

secondary

impact
this

energy
is
also

partially
absorbed

by
contraction
characteristics
of
the
column

When
the

collapsible
column
is

installed
in
a

car
it
is

no
more

susceptible
to

damage
than
an

ordinary
column

however
when
the
column
is
removed

special
care
is

required
in

handling
the

assembly
When
the

column
is

removed
from
the

car
such
actions
as
a

sharp
blow

on
the

end
of
the

steering
shaft

or
shift
levers

leaning
on
the

column

assembly
or

dropping
of

the

assembly
could
bend

the

steering
column

jacket
especially
the
bellows

part

which
absorbs
the

energy

ST
8

STEERING

CD

f
w

1
rI

r

EoJiI
c

@
j
@
3
2
j

Jl

1
Lower
column
shaft

2

Upper
column

shaft

3
Lower
column

tube

4
Jacket
tube
5

Plastic

pin

6
Column
collar

7

Column
bush
8

Washer

9

Snap
ring

10

Steering
post
clamp

Fig
ST
15

Collapsible
steering

STEERING
COLUMN

G

ZJ
3

4mi
t
i
r
M
m

i
i
Vtrt
J
trict

I
LoweI
column
shaft

2
Plastic

pin

13

I
Upper
column

shaft

14
I
Lower
column
tube

Fig
ST
16

Steering
column

ST
9

CHASSIS

The

construction
of
the

steering
column
is

as
such
that

the
lower
shaft

is
fitted
into
the

upper
tube
when
a

compressing
force
is

applied
to
the
lower

shaft

r

I

1
V

f

7
Steering
torque
is
transmitted

by
the
lower
shaft

and

upper
tube
The
lower
shaft

adopts
a

special
shape
a

circle
with
two

straight
cut

edges
and
the

upper
tube

interior
is

tightly
fitted

against
the

lower
shaft
exterior

toward
the

entire
area
In
addition
four

plastic
pins

completely
eliminate

gap
between
the
lower

shaft
exterior

and

upper
tube
interior

I

I
Jacket
lube

2
Shaft

stopper

I
3

I
Column
coUar

4

Column
shaft

When
a

compressing
force
is

applied
the
above

described

plastic
pins
are
cut
and
the
lower

shaft
is

fitted

into

the

upper
tube

When
the
lower

shaft
is

once
fitted

into

the

upper
tube
the

shaft
end

spreads
and
the
lower

shaft
cannot
be
withdrawn
unless
an

extremely
high
load

is

applied
Fig
ST
1
7

Shaft
stopper

Moreover

for
rearward
column
shaft

projection
the

collar
for

steering
lock
installed
on
the
shaft

runs

against

stoppers
in
three

places
on
the

jacket
tube
which
allows

the
column
shaft

fitting
and
thus
reaIWard

projection
is

prevented

Note
In
no
event
should
an

impact
or

large
power
be

applied
to
the
shaft

with
a
hammer
or
other
matter

during
disassembly
or

reassembly
The

column
shaft
lower
end
and

upper
end

are

supported

respectively
by
two

worm

hearings
and
a

colwnn

bushing

JACKET
TUBE

w
1

U
II
I

II

I

r

liJl
I
I
D

I
1

1
Mesh
tube

I
2
Jacket

tube

Fig
ST
18

Jacket
tube

ST
10

STEERING

The

jacket
tube
is
of
a
mesh

and
a

part
of

which
is

punched
in
rhombus

forming
an

energy

absorbing
part
of

the

collapsible
steering

Upper
and
lower

guide
tubes
two

guide
tubes

joined

with

polyacetal
resin

are
inserted
into

the
mesh
tube
so

STEERING
POST
CLAMP
that
an

energy
generated

by
collision
can
be
absorbed
as

smoothly
as

possible
with
a
low
load
The

guide
tubes

function
as
a

guide
for

mesh
tube
while
the

mesh
tube

is

collapsed
and

improve

bending
rigidity
of
the

entire

jacket
tube

1

1
Plastic

pin

I
2

I
Clamp

1
3

I
Sliding
block

Fig
ST

19

Steering
post
clamp

The

steering
post
clamp
is
secured

on
the

jacket
tube

with
bolt

08110
81210
and

in
addition
two
aluminum

sliding
blocks
are
set

stationarity
on
the
main

body
with

plastic

pins

Note
For
the
bolt
used
to
install
the

steering

post
clamp

on

the

jacket
tube
do
not
use
bolt

having
a

length

exceeding
the
rated

length
or
otherwise
the
bolt

interferes

the
column
shaft

causing
a
trouble

Tightening
torques
are
as

follows

Steering
post
clamp
Jacket
tube

0
8
to
1
0

kg
m
5
8
to
7
2
ft
lb

Steering
post
clamp

Steering

post
bracket

1
5
to
1
8

kg
m
10
8
to
13
0
ft
Ib

Fig
ST
20

Steering
post

clamp
bolts

ST
11

CHASSIS

The

sliding
block
is
secured
on
the

steering

post

bracket
with

bolts

upper
half
of
the

steering
column
is

supported
on
the

bracket
and
thus
the

steering
post

clamp
is
installed

on
the

body

When
a

large

impact
is

applied
from
the

driver
side
the

plastic

pins
are
cut
off
and

leaving
the

sliding
block
in
the

steering
post
bracket
side
the

clamp
proper
is

disengaged

downward

together
with
the

jacket
tube

For

any
force

applied
from
front
direction
of
the

vehicle
the

steering
post
clamp
sliding
block

does
not

move
rearward
This
construction
is
called
One

way
slide

system
and
with
this
construction

projection
of
the

column
shaft
toward

the
driver
is

prevented
completely

COLUMN
BEARING

b

ciJ
STEERING

WHEEL
SIDE

1
Jacket
tube

2
Washer

3

Snap
ring
4
Column
bush

5
ColurtlO
shaft

Fig
ST
21

Column

bearing
Construction
of
the
column
shaft

upper
bearing
is

as

such
that
both
radial
and
thrust
forces

are
absorbed

DISASSEMBLY

First
remove
the

snap
ring
from
the

upper
surface
of

the

column

bushing
Thereafter

general
instructions
for

ordinary
steering
apply

Inspect
and

adjust
the
sector

shaft
worm
ball

nut
unit

adjust
screw
unit

worm

bearing
and
other
relative

parts

in
accordance
with
the
instructions
for

ordinary
type

steering

INSPECTION

Inspect
the

parts
such
as
column

shaft

jacket
tube
etc

which

are
used

to
absorb

energy
in

accordance
with
the

following
instructions

Check
the
column

shaft

plastic
pin
for
breakdown

2
Check
the

steering
lock
collar

for

warping
and
screw

for
breakdown

3
Measure
tolal

length
of
the

jacket
tube

Replace
if

contracted
However
when

tube

collapse
is
within
3
mm

0

1181
in

adjustmenl
by
means
of

bushing
is
also

possible

4

Check
the

steering
post
clamp
sliding
block
for

tightness

5

Check
the
column
shaft
for

bending
When
the

A
and

B

portions
are

supported
the

bending
should
be
less
than

1
0
mm
0
0394
in

at
the
C

portion

I

l

j
B
H
I

I
lO

J
L
5

0
1969

C
J6

A

UNIT
mm
in

Fig
ST
22
Measurement

of
defective
column

shafr

ST
12

STEERING

REASSEMBLY

Adjust
alignment
and
install
the

worm
shaft
and

jacket
tube
on
the

housing

2

Apply
bearing
grease
to
the
interior

sufficiently
and

screw
the

column

bushing
above
the

rated

position

3

Apply
washer
and

apply
the

snap

ring
to

the

groove

correctly
and

securely

4
Return
the

column

bushing
allowing
the

top
surface

of
the

bushing
coming
into

contact
wi
th
the
lower

surface

of
the
washer

adjust
the

clearance
to
less
than
1
0
mm

0
0394
in
and

adjust
the

bushing
position
correctly
so

that
column
shaft

turning
torque
is
the

rated
value

Note
If

the
clearance
is

too
small
the

steering
becomes

heavy

5
Line

up
the

jacket
tube

upper
end
to
the

groove
on

the
outer

circumference
of
the
column

bushing
and

securely
caulk

two

symmetrical
positions
on
the
circum

ference
When
caulked

securely
make
sure
that
inner

diameter
of
the

jacket
tube
is
27
5
mm

dia
1

083
in

dia

and
that

length
of

caulking
is
4
mm
0
1575
in
j
410
1575

27
5
dia
1

0831

V

UNIT
mm
in

Fig
ST
23

Note

Be
careful
not
to

crack
the
tube

or
deform
the

bushing
while

caulking
Moreover
when
caulked

make
sure
that
outer
diameter
of
the

jacket
tube
is

less
than
31
8
mm
dia
1
252
in
dia

6

When
column

bushing
position
is

found
to
be

improper
after

caulking
recaulk
or

adjust
with
the

following
shim

s

Thickness

mm
in

0

05
0
0020

0
10
0
0039

7
Install
the

sector
shaft

adjust
screw
and
side

cover

in

the
manner
identical
to

ordinary
steering

STEERING
LINKAGE

CONTENTS

REMOVAL

DISASSEMBl
Y

INSPECTION
AND
REPAIR

ASSEMBl
Y
ST
14

ST
14

ST
15

ST
15
INSTAllATION

ACCIDENT

COLLISION

ADJUSTMENT
ST
16

ST
16

ST
16

ST
13