1973 DATSUN B110 charging

ENGINE

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Ignition
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iArm
ture

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VC2
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I

I

PI

I

ll
Rl

L

I
I

lRJ
t

R
I

Field

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I

I

I
I

Ps
I

1
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n
I

coil

M
4

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f
I

L
1
J

Alternator

Voltage
regulator

Fig
EE
2B

ChaTging
ciTcuit
II

ALTERNATOR

CONTENTS

DESCRIPTION

REMOVAL

DISASSEMBL
Y

INSPECTION
AND
REPAIR

Rotor

inspection

Inspection
of

stator

I

nspection
of
diode
EE
16

EE
17

EE
17

EE
19

EE

19

EE
19

EE
20

DESCRIPTION

In
the
alternator

a

magnetic
field
is

produced
by
the

rotor

which
consists

of
alternator
shaft
field
coil

pole

pieces
and

slip
rings
The

slip
rings
pressed
in
the

shaft

conduct
only
a
small
field
current

Output
current
is

generated
in
the
armature

coils
located
in
the
stator

The

stator
has
three

windings
and

generates
three

phase

alternating
currenl

Silicon
diudes
act
like
a

one

way
valve

for

electricity
so
that

charging
currcnt

passes
easily
but

reverse

current
is

shut
out
In

this
alternator
six
diodes
0

E
0

c

co

0

E
c

o

0

c

Cl
Battery

T

e

I

nspection
of
brush

Spring
pressure
test

REASSEMBL
Y

ALTERNATOR
TEST

SPECIFICATIONS
AND
SERVICE
DATA

Specifications

Service
data
EE
20

EE
21

EE
21

EE
21

EE
22

EE
22

EE
22

are
used

three

negatives
and
three

positives
Positive

plate
has
three

positive
diodes
and

negative
plate
has
three

negative
diodes
and

are
installed
in

positive
and

negative

plates
as
an

assembly

Pack

type
silicone
diodes
are
used
in
this

alternator

These
diodes

are

direct
soldered
at
their

tips
and

con

structed
with

positive
and

negative

conjunction
They
are

mounted
on

the
two

plates
which
combine
the

function

of
heat

dissipating
plate
and

positive
negative
terminals

and
are

light
in

weight
and

easy
to

service

EE

16

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

Low

output

Excessive

output
Regulator

Wiring

Alternator

Regula
tor

Wiring

Alternator

Regulatur
ENGINE

Faulty
voltage
regulator
point
con

tact

Broken
cable

or
disconnection
of

charging
cireui
t

Sticking
brushes

Low
brush

spring
tension

Dirty
slip

rings

Partially
shorted

ground
or

open

stator
coil

Partially
shorted

or

grounded
rotor

coil

Defective
diode

Loose
or
worn

fan
belt

Improper
voltage
regulator
adjust

ment

Faulty
voltage
regulator
point
con

tact
Defective

operation

Faulty
charging
circuit
lead

wire

connection

Loose

battery
terminal

Short
circuited
or
broken
neutral

wire

Improper
voltage
regulator
adjust

ment

Defective

operation

Improper
charge
relav

adjustment

detective

operation
and
or

faulty

point
contact

EE
28
Repair
or

replace
the

regulatur

Repair
or

replace

Correct
or

replace
brushes
if
neces

sary

Correct
or

replace
brush

Clean

Replace
the

stator

Replace
the
rotor

Replace
the
diode

assembly

Retighten
or

replace
the

belt

Check
the

voltage
regulator
op

eration
and

repair
or

replace
as

required

Repair
or

replace
the

regulator

Repair
or

replace

Retighten

Replace
the
wire

Check
the

voltage
regulator
op

eration
and

repair
or

replace
as

required

Check
the

charge
relay
operation

and

repair
or

replace
as

required