1973 DATSUN B110 air condition

ENGINE

ELECTRICAL
SYSTEM

Note
Use
care
in

handling
diode

assembly
to

prevent
an

undue
stress
on

it

INSPECTION
AND
REPAIR

Remove
the

alternator

from
the
vehicle
and

apply
the

tester
between
the

lead
wire
F
white
with

black

tracer

and

the
lead
wire
E

black
color
When
the

resistance
is

approximately
511
the
condition
of

brush
and
field

coil
is

satisfactory
When
no

conduction
exists

in
the
brush

field

coil
or
when
resistance

differs

remarkably
between

those

parts
disassemble
and

inspect

E

o

Fig
BE
37

Inspection
of
alternator

Rotor

inspection

I

Conduction

test
of
field
coil

Apply
the
tester
between

the

slip
rings
of
rotor
as

shown
in

Figure
EE
38
If

there
is
no

conduction
the

disconnection
of
field
coil

may
exist

When
the
resistance

is

approximately
4
4
n

at
normal

ambient

temperature

the
condition
is

satisfactory

Fig
EE
3B

Conduction
test

of
field
coil
2

Ground
test
of
field
coil

Check
the

conduction
between

slip
ring
and
rotor

core

If
the
conduction
exists

replace
rotor

assembly
because

field
coil

or

slip

ring
must
be

grounded

EE042

Fig
EE
39

GTound
test

of
field
coil

Inspection
of

stator

1

Conduction

test

The

stator
is

normal
when

there
is

conduction
between

the
individual

stator
coil

terminals

When
there
is
no

conduction
between
the

individual
terminals

the
cable
is

broken

Replace
stator
as
an

assembly

EE043

Fig
EE
40

Testing
stator

for
cmlduction

2
Ground

test

If
each

lead
wire

of
stator
coil

including
neutral
wire

is

not
conductive
with
stator
core
the

condition
is

satisfactory
If

there
is

conduction

the
stator
coil
is

grounded
Replace

EE
19

ENGINE

MEASUREMENT
OF

REGULATING

VOLTAGE

The

regulator
voltage
is
measured
with
the
alternator

When

measuring
voltage
with

regulator
mounted
on

vehicle
it
is

necessary
to
rotate

engine
at

high

speed

Connect
DC

voltmeter
15

30V
DC
ammeter

l5
30A
battery
and
resistor
0
25
U
with
cables

as

shown
in

Figure
EE
52

1

Check
to
be

sure
that

all
electrical
loads
such

as

lamps
air

conditioner
radio

etc
are
disconnected

2
Before

starting
engine
be

sure
to
make

short
circuit

with

a
cable
between

fuse
side
terminal
of
resistor

O
25U

and

negative
sIde
terminal
of
ammeter

Failure
to

follow
this

caution
causes

needle
of
ammeter
to

swing

violently
and

rever

ely
resulting
in
a

damaged
anuneter

3

Refer

to
the

following
chart
to
determine
if

regulator

and
relative

parts
are
in

good
condition
REGULATOR

Unh
GENERATOR

q

P

1

CONNECTOR

r
l
ij
WIRE

HARNESS
J

Short
circuit
here

between

fuse
side
terminal

and

H

terminal
of

ammeter
before

starting
the

operation

I

I
I
IG

FUSE

BOX

B

f

EE055

Fig
EE
52

Measuring

regulator
voltage
with

regulator

on
vehicle

I
Start

engine

I
2
Rotate

engine
at
2

500

rpm
for
several

minutes

I

1
minutes

ammeter

I
After

racing
for

reading
below
5A
several

Fully

charged
battery
available

I

Replace
with

fully
charged

battery

2
Check

to
see
if

current
falls
below
5A

Current
falls

below
5A
I
After

racing
for
several

reading
over
5A
minutes
ammetet

I

Fully
charged
battery
not
available

1

Connect
a
0
25
n

resistor
in
series

I
Current
does
not

fall
below
5A

I

Recharge

battery
and
see

if
current
falls
below

5A

I

I
Reduce

engine
speed
to

idling
and

then
raise
it

to
2
500

rpm
while

observing
needle

of
voltmeter

I

I

I

Needle
of
voltmeter
held

within
limits
shown
in

the
below

table

Regulator

functioning

properly

EE

24
Needle
of

voltmeter
out
of
limits
shown
in

the

following
chart

Regulator
out
of

order
Have
it

repaired
at

authorized

shop

ENGINE
ElECTRICAL
SYSTEM

SPECIFICATIONS

Make
and

type

Primary
voltage
v

Spark

gap
mm
in

Primary
resistance

at
200C
680

F
n

Secondary
resistance

at
200C
680F
Kn

External
resistor

at
200C
680
F
n

Applied
resistor
HANSHIN
HITACHI

H5
15
2
C6R
601

12
12

more
than
7

more
than
7

0
28
0
28

1
17
to
I
43
l
l
7

to
I
43

11
2
to
16
8
11
2

to
16
8

l
3tol7
l
3tol7

RC
15
5560R
151O

SPARK
PLUG

CONTENTS

DESCRIPTION

INSPECTION

CLEANING
AND

REGAP
EE
37

EE
37

EE
38

DESCRIPTION

The

spark
plugs
are
of
the
resister

type
having
14
mm

0
551
in
threads
and
0
8
to
0
9
mm
0
031
to
0
Q35
in

gap

Note
All

spark
plugs
installed
on
an

engine
must

be
of

the

same
brand
and
number
of
heat

range

INSPECTION

1
Remove

spark
plug
wire

by
pulling
on
boot
not
on

wire
itself

2
Remove

spark
plugs

3

Check
electrodes
and
inner
and
outer

porcelains
of

plugs
noting
the

type
of

deposits
and
the

degree
of

electrode
erosion

Refer
to

Figure
EE
74

Normal
Brown

to

grayish
tan

deposits
and

slight
elec

trode
wear
indicate
correct

spark

plug
heat

range
SPECIFICATIONS
AND

SERVICE
DATA

TROUBLE

DIAGNOSES
AND

CORRECTIONS
EE
38

EE
39

Carbon
fouled

Dry
fluffy
carbon

deposits
on
the

insula

tor
and

electrode
were

mostly
caused

by
slow

speed

driving
in

city
weak

ignition
too
rich
fuel
mixture

dirty
air

cleaner
etc

H
is

advisable
to

replace
with

plugs
having
hotter
heat

range

Oil
fouled
Wet

black

deposits
show

excessive
oil

en

trance
into
combustion

chamber

through
worn

rings

and

pistons
or
excessive

clearance
between

valve

guides

and

stems
If
the
same

condition
remains

after

repair

use
a

hotter

plug

Overheating
White
or

light
gray
insulator
with
black

or

gray
brown

spots
and

bluish
burnt
electrodes
indicate

engine

overheating
Moreover
the

appearance
results

from
incorrect

ignition
timing
loose

spark
plugs
low

fuel

pump
pressure
wrong
selection

of
fuel
a

hotter

plug
etc

H
is
advisable
to

replace
with

plugs
having
colder

heat

range

EE
37

ENGINE
ELECTRICAL
SYSTEM

TROUBLE
DIAGNOSES

AND

CORRECTIONS

When

engine
does
not

start

If
there
is
no
trouble
in
fuel

system

ignition
system

should
be
checked
This
can
be

easily
done

by
detaching
a

high
tension
cable
from

spark
plug
starting
engine
and
observing
condition
of

spark
that
occurs
between

high

tension

cable
and

spark
plug
terminal
After

checking
this

repair
as

necessary

Length
of

Trouble
location
Cause
Remedies

spark
gap

No

sparks
at
all
Distributor

Defective
insulation
of
condenser

Replace

Breakage
of
lead
wire
on
low
tension
side

Repair

Defective
insulation
of

cap
and

rotor
head

Replace

Point
does

not

open
or
close

Repair

Ignition
coil
Wire

breakage
or
short
circuit

of
coil

Replace
with
new

one

High
tension
cable
Wire

coming
off

Repair

Defective
insulation

Replace

I

to
2
mm

0
0394
Distributor
Point

gap
too
wide

Correct

to
0
0787
in

or

Oil

sticking
on

point
Clean

irregular

Point
burnt

too
much

Replace

Less
than
6

mm
Spark
plugs
Electrode

gap
too
wide
Correct
or

replace

0
2362
in

Too

much
carbon
Clean
or

replace

Broken
neck
of
insulator

Replace

Expiry
of

plug
life

Replace

2

When

engine
rotates
but
does

not
run

smoothly

In

this
case
there

are

many
causes
resulting
from
the

ignition
system
and

other

engine
conditions

not
related
to
ignition
Therefore
first

complete

inspection
of

ignition

system
should
be
carried
out

EE
39

CLUTCH

2

Measuring
and

adjusting
height
of

diaphragm
spring

I
Line

up
distance

piece
special
tool

ST20059001

on

clutch

assembly
base

plate
special
tool
ST20101O
0

ST20059001

I

ST20101000

Fig
CL
5

Base

plate
and
distance

piece

2

Place
the
clutch

assembly
on
the
distance

piece
and

set
the

clutch

assembly
on

the
base

plate
stationarily

Under
this
condition
the

distance

piece
is

placed
beneath

the

pressure
plate

3
Measure
the

diaphragm
spring
height
from
the

upper

surface
of
the
base

plate
with
vernier

caliper
depth
gauge

Height
of

diaphragm
spring
end
29
0

to
31
mm

1
142
to
1
220

in
at
diameter
62
mm
2
441
in

29
0
to
31

It
142
to
1

2201

6212
44
t

r
1

G
L
ir

I
LJIlW

I

y
y
x
l
i
0

BASE
PLATE

Unit

mm
in

Fig
CL
6

Measuring
height
of
dio

phTagm
spTing
4

Adjust
height
of

the

diaphragm
spring
by
the
use
of

diaphragm
spring
adjusting
wrench

special
tool

ST20
1
05000

if

required

Fig
CL
7

Adjusting
dio

phTagm
spring
height

Disc

assembly

If

the

facing
is

soiled
with

grease
or
oil
clean
off

with

gasoline
tetracWoride
and
dress
the

facing
with
a

wire
brush

Replace
the

facing
if

required

2

Check
the
disc
for
deflection
and

repair
or

replace
if

the

deflection
at
the
outer
circumference
of
the

facing

exceeds
the
following
value

Upper
limit
of
the
deflection

0
5

mm
0

0197
in

at

85
mm
3
3460
in

radius

Unit
mm
in

Fig
CL
8

Checking
disc

fOT
deflection

CL
3

CHASSIS

fulcrum

type

The
mechanical

type
clutch
control

system
consists

of

pendent
clutch

pedal
clutch

control
cable
and
with

drawallever
The

withdrawal
lever
is
of
an

outer
fulcrum

type
which

provides
a

great
lever
ratio
and
thus
force

required
in

depressing
clutch

pedal
is
reduced

CLUTCH

PEDAL

Hydraulic
clutch

Removal

Remove
the
return

spring

2

Loosen
the
lock
nut
of
the
master

cylinder
push
rod

and

disconnect
the

push
rod
end

3

Remove
the
lock

nut
and
washer

of
the

pedal
shaft

and

remove
the

pedal
lever

Inspection

Thoroughly
clean
all
disassembled

parts
indicated

below
and

carefully
check
them

for
wear

damage
and

other
abnormal
conditions

Repair
or

replace
them

with

new
ones
if

required

f

fS

C5

J

dJ

YII

10

1

@
c
i
@

j

1

4

K

Clutch

pedal
free
trrlel

30
mm
1
181

nl

00

@

P

IO
Pedal
head
rubber

2

Return

spring

3

Pedal
lever
bush

4
Fulcrum

pedal
pin
etc

Reinstallation

Reinstall
the

clutch

pedal
in
reverse

sequence
of

removal

Adjustment

I

Adjust
pedal
pad
height
to
143
5
mm
5
65
in

without

stopper
The

adjustment
is

made

by
selecting
and

applying
shim
s

having
adequate
thickness

Be

sure
to
use
shims

having
same
thickness
for

both

upper
and
lower

2

Next

adjust
the

pedal
stopper
properly
so
that
the

pedal
pad
height
is

141
5
mm
5
57
in
and
secure
the

position
with
lock

nut

Note
Make
sure
that
chassis

grease
has
been

applied
to

the

leG
marked

portions
two

places
Grease
if

required

Adjusting
shim

Part
number

Thickness
mm
in

30611
27260

30612
27260

30613
27260
1

6
0
0630

0

8
0
0315

0
5
0
0197

I

2

3
Adjusting
shim

Pedal
lever

Pedal

stopper

Unit
mm

inl

Fig
CL
J5

Pedal

height
adjustment

CL
6

CLUTCH

CLUTCH

PEDAL
AND
CLUTCH

CONTROL
CABLE

Mechanical
clutch

Removal

Loosen

the
control
cable

adjusting
nut
and
discon

nect
the

control
cable
from

the
withdrawal
lever

III
Adjusting
nut
2

I
Lock
nut

Fig
CL
16
Clutch

cunITol
cable

11
I
Withdrawal
lever

I
2

I
Clutch
control
cable

Fig
CL
17

Disconnecting
clutch
control
cable

2

Unhook
the

clutch

pedal
return

spring

3
Remove

the
clutch
brake

Pedal
installation
bolts
and

remove
the

clutch

pedal
and

control
cable
1

I
Return

spring

31
au
tch

pedal

2
Fulcrum

pedal
pin

Fig
CL
I8

Removing

pedal
installation
bolt

Inspection

Thoroughly
clean
all

disassembled

parts
indicated

below
and

carefully
check

them
for

wear

damage
and

other
abnormal
conditions

Repair
or
replace
as

required

Control
cable

2

Pedal
head
rubber

3

Pedal
lever
bush

4
Fulcrum

pedal
pin

5

Others

Reinstallation

Reinstall

the
clutch

pedal
and
clutch
control

cable
in

reverse

sequence
of
removal

Alljustment

Adjust
the

pedal
stopper
so

that

pedal
height
is
in

range
from
136
5
to
146
5

mm
5
4

to
5

8
in
and
secure

the

position
with

lock
nut

completely

2

Next

adjust
the
control
cable

adjust
nut
so

that

clutch

pedal

play
is
in

range
from
II

to
15

mm
0
433

to

0
591
in
at

the
center
of
the

clutch

pedal
pad
and
make

sure
that

play
at
P

point
of

the
withdrawal

lever
is
in

range
from
3

0
to
4
0

mm

0
1181
to
0
1575
in

Secure

the

alignment
with

lock
nut

completely

CL
7

TRANSMISSION

15

Remove
the

needle

bearing
synchronizer
hub
thrust

washer

steel
ball
3rd
4th

synchronizer
mechanism

baulk

ring
3rd

gear
and
main

shaft
needle

bearing
toward

the
front
side
in

that
order

S
b

L

74FE

r

1
Needle

bearing

2
Thrust
washer

3
Steel
ball

4

Coupling
sleeve
5

BauIk

ring

6
3rd

gear

7
Needle

bearing

Fig
TM
21

Layout
of
main

shaft

16
Remove

the
main

bearing
from
the
main
shaft

by

the
use

of
a

bearing

puller
special
tool
ST2273
000
and

a

press

1

ST22730000

r
1

t

Jii

Fig
TM
22

Removing
main

drive

l7earing

17
Remove
the
thrust

washer
I
st

gear
needle

bearing

baulk

ring
1st
2nd

synchronizer
mechanism
baulk

ring
main
shaft
2nd

gear
needle

bearing
etc

from
the

main
shaft
1

2

3

4
5

Coupling
sleeve

6
Baulk

ring

7
2nd

gear

8
Needle

bearing
Thrust
washer

1st

gear

Needle

bearing

Baulk

ring

Fig
TM
23

Layout
of
main

shaft

18
Re

move
the

bearing
from
the
counter

gear

19
Remove
the

snap
ring
from
the
main

ge
f
and

remove
the
main
shaft

bearing

INSPECTI9N

Thoroughly
clean
all
disassembled

parts
with
solvent

and
check

them
for
wear

damage
and
other

defective

conditions

Transmission
case
and

rear
extension

Clean
them
with
solvent
thoroughly
and
check
for

crack

which

may
cause
oil

leaking
and
other
defective

conditions

I

When
burr

pitting
and
or
other

damage
exists
on

the

joint
repair
or

replace

2

Remove
adhesive
from
the

installing
surface
com

pletely

3

Repair
or

replace
the
dowel

pin
knock

pin
if

damaged
bent
or

warped

4

When
rear
extension

bushing
interior
is
worn

unevenly
replace

TM
7

Ii

01
r