engine DATSUN B110 1973 Service Repair Manual

ENGINE

G

2

3
N

terminal

Brush
holder

Brush
holder
cover
@

f

fI

0

EE034

Fig
EE
31
Removal

of
brush

3
Loosen
and
remove
three

through
bolts

Separate
the

diode
end

housing
from
the
drive
end

housing
assembly

by
tapping
the
front
bracket

lightly
with
a
wooden
mallet

1

L

c

EE035

Fig
EE

32
Separating

front
cover
with
Totor

from
rear
cover

4

Remove
three
screws
from
the

bearing
retainer

and

separate
the

rotor
from
the
front
cover

L1

1

t

DO

L
EE036

Fig
EE
33
Removal

of
TOtOT
5
Pull
out
the
rear

bearing
from
the
rotor

assembly

with
a

press
or

bearing

puller

I

I

l

I

EE037

Fig
EE
34

Pulling
out

of
TeaT

bearing
I

j

EE038

Fig
EE
35

Pulling
out

of
Tear

bearing
II

6
Remove
the

diode
cover
fIxing
screw
and
remove
the

diode
cover
Disconnect
three
stator
coil
lead
wires

from

the
diode
terminal
with
a

soldering
iron

7

Remove
the
A
terminal
nut
and
diode
installation

nut
and
remove
the
diode

assembly

Diode

assembly

I

o

@

Diode
cover

rJ
0
00

@

Y

o@

o

EE039

Fig
EE
36

Removing
diode

assembly

EE
18

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

Stator

core

EE044

Fig
EE
41

Testing
stator

for
ground

Inspection
of
diode

Perform
a
conduction
test
on
diodes
in

both
directions

using
an

ohmmeter
A

total
of
six
diodes
are

used
three

are
mounted
on
the

positive
EB

plate
and
other
three
are

on
the

negative
3
plate
The
conduction

test
should
be

performed
on
each

diode
between

the
terminal
and

plate

The
diode
installed
on
the

G
l
plate
is
a

positive
diode

which
allows
current

flowing
from
the
terminal
to

G
l

plate
only
In
other
words
current
does

not
flow
from
the

G
l
plate
to
the
terminal

EE046

Fig
EE
42

Inspecting
positive
diode

The

diode
installed
on
the

8
plate
is
a

negative
diode

which
allows
current

flowing
from
the

8
plate
to
the

terminal

only
In

other
words
current
does
not
flow
from

the

terminal

t08
plate

EE
20
8
Plate

EE047

Fig
EE
43

Inspecting
negative
diode

If
current

flows
in
both

positive
and

negative
diree

tions
the

diode
is
short
circuited
If

current
does

not
flow

in

any
direction
the
diode
is

open
These
diodes
are

unserviceable
If
there
is
a

defective
diode

replace
all

diodes
six

diodes
as
an

assembly
See
the

Figure
EE44

I
Test

probe
of
a
circuit
tester

I
8
E8

I
terminal

E8
plate

I
@
plate
terminal

I
terminal

8
plate

18
plate
te
rminal

18
plate
@

plate

18
plate

8
plate
Conduction

x

x

x

Fig
EE
44

lnspection
of
diodes

Inspection
of
brush

Check
the
movement

of
brush
and
if
the
movement
is

unsmooth
check
brush

holder
and
deJn
it
If
th
bmsh
is

worn
and
the

length
is

7
mm
0

2756
in
or
less

replace

the
brush
with
a
new

one
Check
the

brush

pig
tail
and
if

it
is
about
to
break

replace

ENGINE
ElECTRICAL
SYSTEM

EE127

Fig
EE
45

Brush
wear
limit

Spring
pressure
test

With
the
brush

projected
approximately
2
mm
0

0787

in
from
the
brush
holder
measure
brush

spring

pressure

using
a

spring
balance
Normally
the
rated

pressure
of
a

new
brush

spring
is

255
to
345

grams
9
0
to
12
2

oz

Moreover
when
the
brush
is

worn

pressure
decreases

approximately
20

grams
per
I

mm
0

0394
in

wear

2

rnm
0
0787
in

r

II

EEQ49

Fig
EE
46

Measuring
spring
pressure

REASSEMBLY

Reassemble
the
alternator
in

reverse

sequence
of

disassembly
noting
the

following
matters

I

When
soldering
each
stator
coil
lead
wire
to

the
diode

assembly
terminal

carry
out
the

operatic
as
fast
as

possible

2

When
install
the
diode
A
terminal
install
the

insulating
bushing
and
insulating
tube

correctly

EE
21
EE050

I

Insulating
bush

2
Rear
cover

3
Diode

assembly
4

Insulating
bush

5

A
terminal
bolt

6

Diode
cover

Fig
EE
47
Sectional
view

of
diode
and
A
terminal

3

Tighten
the

pulley
nut
with

tightening

torque
of

350

to
400

kg
cm
301
to
344

in
Ib
When
the

pulley
is

tightened
make
sure
that

deflection
of
V

groove
is
less

than
0
3

mm
0
0118
in

EE051

Fig
EE
4B

TiJ

htening
pulley
nut

ALTERNATOR

TEST

Before

conducting
an
alternator
test
make
sure
that

the

battery
is

fully
charged

To
conduct
a
test
it
is

necessary
to
use
a

3D
volt

voltmeter
and
suitable
test

probes

Set

up
a
test
circuit
as
shown
in

Figure
EE
49
and
test

the
alternator
in
the
manner
indicated
in
the

flow
chart

below

Disconn
ct
connectors
at
alternator

2
Connect
one
test

probe
from
voltmeter

positive

ENGINE

terminal
to
IN
terminal
or
BAT
terminal
Connect
the

other
test

probe
to

ground
Make
sure
that
voltmeter

registers
battery
voltage

4
Start
the

engine
3
Turn
on

the
headlights
and
switch
to
main
beam

I

o

B

ttefY
E

A

J
0

il

I
5
Increase

engine
speed
gradually
until
it
is

approxi

mately
1

100
rpm
and
take
the
voltmeter

reading

6
If
the
measured
value
is
over
12
5

volts
the

alternator
is
in

good
condition
o

I

eE052
Voltmeter

Fig
EE
49

Testing
altematoT

Notes
8
Do
not
run

engine
at
the

speed
of

more
than

1
100

rpm
while
test
is

being
conducted
on

alternator

b
Do
not

race

engine
7
If
the

measured
value
is
below
12

5
volts
the

alternator
is
in

trouble
Remove
and
check
it

for

condition

SPECIFICATIONS
AND
SERVICE
DATA

Specifications

Make
and

type

Nominal

output

Pole

Revolution

No

load
minimum

revolution

Output
current

Wei
t

Applied
regulator

Service
data

Stator
coil

Resistance

per
phase

Rotor
coil

Resistance

Brush

Brush

length

Wear
limit

Spring
pressure

Slip
ring

Outer
diameter
V
A
HITACHI
LTl35
13B

12
35

rpm
Negative
ground

1
000
to
13

500

rpm

A
V

rpm

kg
1b
less
than
1

000

more
than
28

14
2

500

3
4
7
5

TLl
Z
57

n
0
17

at
200C
680F

n
4
4
at
200e
680
F

mm

in

mm
in

kg
lb
14
5
0

571

7
0
2756

0
25
to
0
35
0

55
to
0
77

mm
in
31
1
220

EE
22

Charge
relay

SPECIFICATIONS
AND
SERVICE

DATA

TROUBLE
DIAGNOSES

AND

CORRECTIONS
ENGINE
ElECTRICAL
SYSTEM

Reduction

limit

Repair
limit

Repair
accuracy
mm

in

mm
in

mm
in

REGULATOR

CONTENTS

DESCRIPTiON

MEASUREMENT
OF
REGULATING

VOLTAGE

ADJUSTMENT

Voltage

regu
lator
EE
23

EE
24

EE
25

EE
25

DESCRIPTION
I
0

0394

0
3
0
0118

0
05
0
0197

EE
26

EE
26

EE
27

1

I
T
r

@
V
The

regulator
basically
consists

of
a

voltage
regulator

and
a

charge
relay
The

voltage
regulator
has
two
sets
of

contact

points
a

lower
set
and

upper
set
to

control

altemator

voltage
An

armature

plate
placed
between
the

two
sets
of
contacts

moves

upward
or

downward
or

vibrates

The
lower
contacts
when

closed

complete
the

field
circuit
direct

to

ground
and
the

upper
contacts

when
closed

complete
the
field
circuit

to

ground
through

a
resistance

field
coil
and

produces
alternator

output

The

charge
relay
is

similar
in
construction

to
the

voltage

regulator

When

the

upper
contacts
are

closed

ignition
warning

lamp
goes
on
I
Point

gap

2

Lower
contact

3
Armature

4
Core

gap

5
Yoke

gap

6

Connecting
spring

7
Yoke

8

Adjusting
screw

9
Locle
nut
10

Adjust
spring

11
Coil

12

3mmCO
1181
n
dia

screw

13
4
mm
0
1575

in
dia

screw

14
Contact
set

15

Upper
contact

Regulator
model

Applied
alternator
a
Construction

of

voltage
regulator

TLlZ
57

LTl35
13B

I
Point

gap
10
Lock
ut

2

Charge
elay
antact
Ii
Adjust

spring

3

Connecting

sprinl
12
Coil

4
Armature
i3
3
mm

0
1181
dia

5
Core

gap
screw

6
Yoke

gap
14
4mm
O
1575
n

dia

7
Yoke
crew

8

Adju
ting
screw
15
Contact
set

9
Voltap
e

ree
ulaloT
contact

b

Cons
rue

ion
of

charg
relay

Fig
EE
5J
Structural
view
Fig
EE
50
View

of

removing
cover

As

for
the
construction
the

voltage
regulator
is

very

similar
to

the

charge
relay
as
shown

in

Figure
EE
51

EE
23

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

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

at
4
to
5
V

Use

i
f
DC
voltmeter
and
set

up
a
circuit

as
shown
in

Figure
EE

56

EEQ58
L
W

R

IG

Will

r

AI
W

lli

r

N
Y

vge

I

JJ
Rtl
ublOr

I
I
Spanner

Cross
head

screwdriver

I

I
Adjusting
screw

Lock
nut

Vollm
lcl

Fig
EE
55

Adjusting
Tegulating
voltage

Charging
relay

Normal

relay

operating
voltage
is
8
to

10V
as
measured

at
alternator
A
terminal

Relay
itself
however

operates
EE059

Fig
EE
56

Testing

chaTging
Telay

Connect

positive
terminal
of

voltmeter
to

regulator
lead
connector
N

terminal
with

negative
terminal

grounded

2

Start

engine
and

keep
it

idle

3
Take
voltmeter

reading

o

Volt
Below
5
2
Volt
I

Over
5
2
Volt

I
Check
for

continuity
between

N

terminals
of

regulator

and

alternator

2
Alternator
circuit

defective
if

continuity
exists
pilot
lamp
remains

lit

I

Check
fan
belt
tension

2

If
correct

remove

regulator

and

adjust
as

necessary
Pilot
lamp
remains
lit

Pilot

lamp
relay
coil
or

contact

points
out
of
order

Replace
regulator

Over
5

2
Volt

Pilot

lamp
does
not

light

Pilot

lamp
relay
assembly
is
in

good
condi

tion

SPECIFICATIONS
AND

SERVICE
DATA

Voltage
regulator

Model
HITACHI
TLl
Z
57

Regulating
voltage
with

fully
charged

battery
and

regulator
faced

downward
V
14
3
to
15
3
at
200C
680F

EE
26

ENGINE
ELECTRICAL
SYSTEM

Rotor

coil

inserting
resistance
n

n
10
5
at
20DC
68DF

10
Voltage
coil
resistance

Core

gap

Point

gap
rnm

in

mm
in
31

40

0
6

to
1
0

0
0236
to
0

0394

0
3
to
0
4
0

0118
to
0

0157
Voltage
coil

series
resistance

Smoothing
resistance
n

Charge
relay

Release

voltage

Voltage
coil
resistance
V
4
2

to
5

2
at
N
terminal

n
37
8
at
20DC
68DF

mm
in
0
8

to
1
0
0

0315
to

0
0394

mm
in
0
4
to
0

6
0
0157
to
0
0236
Core

gap

Point

gap

Standard

temperature
gradient
D
015

VIDC

TROUBLE
DIAGNOSES
AND
CORRECTIONS

Troubles
Trouble

location
Causes
Remedies

Not

output
Alternator

Sticking
brushes
Correct
or

replace
brush
and
brush

spring

Dirty
brushes
and

slip
rings
Clean

Loose
connections
or
broken
leads

Retighten
or
solder
connection

Replace
leads
if

necessary

Open
stator
coil

Repair
or
replace
the

stator
coil

Open
rotor
coil

Replace
the
rotor

Defective
diodes

Replace
the
diodes

assembly

Shorted
rotor

Replace
the
rotor

Shorted
stator

Repair
or

replace
the

stator

Grounded
A
terminal

Replace
the
insulator

Broken
fan
belt
Replace
the
belt

EE
27