clock DATSUN B110 1973 Service Owner's Manual

ENGINE

Adjusting
throttle

opener
setting
engine
speed

1
Connect
servo

diaphragm
vacuum
hose

directly
to

intake
manifold

connector
without

laying
through

vacuum
control
valve

2
With

negative
pressure
vacuum
in

intake
manifold

servo
diaphragm

operates
and

thus
the

primary

throttle
valve

is

opened
When

servo

diaphragm
nor

mally
operates

engine
speed
rises

reaching
1
650

to

1

850

rpm
When

engine
speed
is

not
within
this

range

turn

adjusting
screw
as

necessary
See

Figure
ET
20

l
When

engine
speed
is
lower

than
the

prescribed

range
turn

adjusting
screw

clockwise

2
When

engine
speed
is

higher
than
the

prescribed

range
turn

adjusting
screw

counterclockwise

Upon
completion
of
the

adjustment
set

adjusting

screw
lock
nut

secwely
making
sure
that

engine
speed

is
in

the

prescribed

range

@
II
I
AdJustmg
screw

2
Lock

nut

Fig
ET
20
Servo

diaphragm
adjusting
screw

Servo

diaphragm

Servo

diaphragm
stroke

Link

EC015
3

Disconnect
servo

diaphragm
vacuum

hose
from

intake

manifold
and
connect

it
to

vacuum
control

valve

Connect

vacuum
hose
of

control

valve
to
intake

manifold
normal

piping

Racing

Place
shift

lever
in

neutral
for

MfT
or
N

or
p

for

AlT
Raise

engine
speed

up
to

approximately
3

000

rpm
under
no
load
and

close
throttle

valve

by

releasing

it

from
hand

Examine

engine
speed
to
see

whether
it
falls
to

idling

speed

I
When

engine
revolution
rails
to

idling
speed

See

Figure
ET
24

The

primary
throttle

valve
is

opened
by
the
link

connected

to
it

When
the

engine
speed
is
increased

to

approximately
3

000

rpm
and

lowered

natually

from
this

speed

changes
in

servo

diaphragm
link

stroke
manifold

vacuum
and

en
ine

speed
are
as

shown
in

Figure
ET
21

o

u

u

0

2
Se
o

diaphragm
link
stroke

I
u

2

Full

0

o

Intake
manifold
vacuum

u

c

E

c

O
3000

c

e

Engine
speed

2000
g

i

c

1000

T
j

Time

second

Fig
ET
21

Changes
in
servo

diaphragm
link
stroke
intake

manifold
vacuum
and

engine
speed

ET
14

ENGINE

How
to
read

Figure
ET
22

Determining
operating

pressure
and

adjustment
of
vacuum
control
valve

1
When

atmospheric
pressure
is
known

operating

pressure
is
found

by
following
the

arrow
line
A

When
altitude
is
known

operating
pressure
is
found

by
following
the
arroW
line
B

2
Turn

the

adjusting
screw
of
the

vacuum
control

valve
See

Figure
ET
23
and

adjsut
the
vacuum

control
valve
so
that

negative
pressure
in
the
intake

manifold
is

suspended
for

a
few
seconds
at
the
value

of

operating
pressure
found

as
described
in
I
above

while
the

engine
speed
decreases
from
3

000
to

1

000

rpm

I
Vacuum

adjusting
screw

2
Vacuum
control
valve

3

Lock
screw
4
Throttle

opener

solenoid

5
Control
valve

assembly

Fig
ET
23
Vacuum
control
valve

II
When

engine
revolution
does

not
fall
to

tdling
speed

Intake
manifold

I
Throttle

opene
operating

I
vacuum
curve
when

racing

Operating

pressure

Idling

Engine
evolution

3
000
rpm
Notes
a
When

turning
the
vacuum

adjusting
scre
N
do

not

depress
the
screw

with
a
screwdriver

b
When

measuring
operating
pressure
be
sure
to

tighten
the
lock
screw
of
the
vacuum

control
valve

first

c
When

the
servo
diaphragm
does
not
draw
the

link
or

operating

pressure
is

high
vacuum
turn
the

vacuum

adjusting
screw
clockwise
When
the
servo

diaphragm
draws
the
link
at

idling
speed
or

operating
pressure
is
low
vacuum
turn
the
vacu

um

adjusting
screw
counterclockwise

Set
lock
screw

stationarily

repeat
the
above

described

adjustment
and
make

sure
that
tho

operating
pressure
is
correct
and
that
the

engine

speed
settles
down
at
the
rated

idling

speed

When

engine
revolution
does
not
CaU
to

idling

speed
See

Figure
ET
24

When
the

engine
revolution
does
not

fall
to

the

idling
speed
it
is

necessary
to
reduce

the

idling

negative
pressure
of
the
intake
manifold
lower

than

the

operating
pressure
of
the
throttle

opener
See

Figure
ET
24
case
of

Il
Il

I
When

engine
revolution
falls
to

idling
speed

Intake
manifold

I
Throttle

opene
operating

I
vacuun
curve

when

racing

No
load

No
load

Operating

pressure
I

I

I

I

I

I

I

I

I

Idling
Engine
revolution
3
000

rpm

Fig
EY
24

Characteristic
curves

of
throttle

opener

In

this
case
B
it
is

necessary
to

labour
the

engine

on
road
I
by
chassis

dynamometer
2

or
by

raising
rear
axle

by
stand
3

The
car
should
then
be
accelerated
from
64
to
80
kro
h
40
to

SO
MPH

in

top
gear
for
M
T
or

0

position
for
A

T
After

the
above

procedure
has
been

completed
the

ET
16

FUEL
SYSTEM

c

Oke
valve

1

Or

Rubber
band

Fig
EF
2B

Adjusting
choke
unloadeT

Hi
metal

setting

Measurement
of
bi
metal
heater

resistance
Install
the

bi
metal
cover
in

place
on

the
carburetor
Make

sure
that

the
resistance

across
the

terminal
and
the
carburetor

body

is
in

the

range
from
8
6

to
9
0

ohms
Measure

the

resistance
without

electric
current

through
the

heater
and

at
about

210e
700F

Note
Use
an
accurate

measuring
instrument
such
as
a

wheatstone

bridge

2
Bi
metal

cover

setting

Position
the
hi

metal
cover
until
the
index

mark
is

aligned
at
the
middle

point
of
the
scale

Note
When
somewhat
over
choked
set
bi
metal

cover

after

turning
it
clockwise

slightly
Fig
EF
29

Setting
hi
metal
cover

EF
17

ENGINE
ElECTRICAL
SYSTEM

Ambient

temperature
Rated

regulating
voltage

roC
OF
V

10
14

14
6
to
15
6

0
32

14
45
to
15

45

10
50
14
3

to
15
3

20
68
14
15

to
15
15

30

86
14

0
to
15
0

40
104

13

85
to
14
85

Note
8

Do
not
measure

voltage

immediately
after
driv

ing
Do
this
while

regulator
is
cold

b
To

measure
voltage
raise

engine
speed

gradual

ly
from

idling
to
rated

speed

c

Voltage
may
be

approximately
O
3V

higher

than
the
rated
for
two
to

three
minutes

after

engine
is
started
or
more

specifically
when

regulator
becomes
self
heated
Measurements

should

then
be
made
within
one
minute
after

starting
engine
or
when

regulator
is
cold

d

The

regulator
is
of
a

temperature
compensating

type
Before

measuring
voltage
be
sure
to

meas

ure

surrounding
temperature
and
correct
measure

ments

according
to

the
table
in
the
left
hand
side

ADJUSTMENT

Voltage
regulator

As

the
result
of
above
measurement
when
the

regu

lating
voltage
is
deviated
from
the
rated
value

adjust
the

regulator
in
accordance
with
the

following
instructions

I

Inspect
contact
surface
and
if

rough
lightly
polish

the
surface
with
fine

emery
paper
500
or

600

2
Measure
each

gap
and

adjust
if

necessary
Adjust
the

core

gap
and

point
gap
in
that
order
No

adjustment
is

required
for
the

yoke
gap

J

Adjusting
core

gap

Loosen
the
screw
4
mm
0
1575

in
diameter
which

is
used
to
secure
the
contact
set
on

the

yoke
and
move

the
contact

upward
or
downward

properly
See

Figure

EE
53
t

2

I

I
EE056

4
mm
dia

0
1575
in

dia

screw

Cross
head

screwdriver
Contact
set

Thickness

gauge

Fig
EE
53

Adjusting
COTe

gap

4

Adjusting
point
gap

Loosen

the
screw
3

mm
0

1181
in
diameter
used

to

secure
the

upper
contact
and

move
the

upper
contact

upward
or
downward

adequately
See

Figure
EE
54

EE057

1
Thickness

gauge

2

3
mm
dia
0

1181
in

dia
screw
3
Cross
head
screwdriver

4

Upper
con

tact

Fig
EE
54

Adjusting
point
gap

5

Adjusting
voltage

Adjust
regulating
voltage
with
the

adjusting
screw

When

increasing
voltage
loosen
the

lock
nut
used
to

secure
the

adjusting
screw
and
turn
the

adjusting
screw

clockwise
When

decreasing
turn
this
screw
counterclock

wise
See

Figure
EE
55

EE

25

ENGINE
ElECTRICAL
SYSTEM

SPECIFICATIONS
AND

SERVICE
DATA

Specifications

Make
and

type
0412
80
0412

89

for
Manual
for
Automatic

Transmission
Transmission

Firing
order
1
3
4
2
I
3
4
2

Rotating
direction
Counterclockwise

Counterclockwise

Dwell

angle
49
550
49
550

Condenser

capacity
J
lF
0
20
to

0
24
0

20
to
0
24

Service
data

Point

gap
mm
in
0
45
to
0
55

0
0177
to
0

0217

0

50
to
0
65
1
1
to
1
4
Point

pressure
kg
lb

Condenser

capacity
p
F

Micro
Farad
0

20
to
0
24

Condenser
isolate
resistance

M
1

Mega
Ohms
5

Cap
carbon

point
mm
in

rom
in

Housing
inner

diameter
mm
in
12
0
472

0
010

D
0004

12
45

0
020
0
4902

D
0008

12
45
018

0
4902
0007
Shaft
diameter

lower

part

Clearance
between
shaft
and

housing
mm
in

Amendment
limit
of
clearance
mm
in
0
010
to

0
Q38
0

0004
to
0

0015

0
08
0
0031

8
0
005

0
3150
0
0002

D

O
14

D
0006

8
O
15

0
3150
0006

0
005
to
0
029

0
0002
to
0
00
II
Shaft
diameter

upper
part
mm
in

earn
inner

diameter
rom
in

Clearance
between
shaft
and
cam

mm
in

EE
35