1973 DATSUN B110 battery

ENGINE

Arma
ture
shaft

Outer
diameter

Pinion
side
mm
in
12

950
to
12
968

0

5082
to
0

5105

11

450
to
II

468

0
4507
to
0
4515

0

1
0

0039

0
08
0
0031
Rear
end
mm
in

Wear
limit

Bend

limit
mm
in

mm
in

Gap
1
between
the

pinion
front

edge

and
the

pinion
stopper
mm
in
0
3
to
1
5

0
0118
to

0
0591

Magnetic
switch

Coil
resistance

Series
cuil
Q

Shunt
coil
n

Plunger
L
dimension
mm
in
0
3
at
20De

68UF

0
9
at
ooe
680F

317t032
3

l
248
to
1
272

TROUBLE

DIAGNOSES
AND

CORRECTIONS
12
950
to
12
968

0
5082
to
0
5105

11

450
to
II

468

0
4507
to
0
4515

l

0
1

0
0039

0
08

0
0031

0
3
to
1
5

0

0118
to
0

0591

0
3

at
20De

680Fl

0
9
at
200e
680F

317
to
32
3

l
248
to
I
272

Troubles
Trouble
location
Causes
Remedies

Starting
motor
will
not

operate

No

magnetic
switch
Battery
Defective

battery
Replace
battery

operating
sound

Over
discharging
Measure

specific
gravity

of

e
Ie

ctrolyte
and

ch
lrge
or

replace
the

battery

Ignition
switch
Defective
contact
Correct

or

replace
ig

nition
switch

Wiring
Faulty
starting
motor

grounding
Correct

Faulty
battery
grounding
Correct

Broken
or
disconnected
cable
Correct

or
replace

EE

12

Magnetic
switch

operating
sound
is

heard

The

starting
motor

rotates

Pinion

gear
does

not

intermesh
with

ring

gear
ENGINE
ELECTRICAL
SYSTEM

Starter

Magnetic
switch

Battery

Wiring

Starting
motor

Magnetic
switch

Ring
gear

Starting
motor
Broken
armature
or
field
coil
cable

Broken
brush

pig
tail

Defective
mica

Broken
or
shorted
series
coil

Faulty
plunger
sliding

Over

discharging

Faulty
terminal

contact
or
loose

connection

Faulty
B
or
M
terminal
connections

Shorted
armature
or
field
coil

Worn

brush
or

improper
spring

pressure

Contaminated
commutator
or
de

fective
mica

Faulty
brush
connection

Seized
metal

Armature
contacted
with

pole
core

Insufficient
plunger
L

dimension

Faulty
contact

Broken
or

shorted
shunt
coil
wire

Worn
teeth

Weakened

pinion
sleeve

spring

Worn

pinion
teeth

EE

13
Replace

Replace

Correct
or

replace

Replace

Repair
or

replace

Measure

specific

gravity

of

electrolyte
arid

charge
if

necessary

Clean
and

retighten

Retighten

Repair
or

replace

Repair
or

replace

Clean
or

repair

Repair

Replace

Repair
or

replace

Adjust

Replace

Replace

Replace

Replace

Replace

Pinion
intermeshes

with

ring
gear

Starting
motor

rotates

and

pinion
intermeshes

with

ring
gear
but
ro

tation
is

too
slow

When

starting
switch
is

set
to
OFF
the
start

ing
motor
does
not

stop
Starting
motor

Battery

Wiring

Ignition
switch

Starting
motor

Ignition
switch

Magnetic
switch

Starting
motor
ENGINE

Faulty
pinion
sliding

Dropped
off
lever

pin

Excessive

plunger
L
dimension

Defective

over

running
clutch

Over

discharging

Improper
or
loose
terminal
contact

Improperly
tightened
connection

Rough
contact
surface

Shorted
armature
coil
or
field
coil

Worn
brush
or
insufficient

spring

pressure

Contaminated
commutator
or
im

proper
brush
contact

Defective
mica

Lack
of
metal
lubrication

Armature

contacted
with

pole
core

Faulty
returning

Seized
contact

Shorted
coil

Faulty

plunger
sliding

Pinion
does
not

disengage
from
the

ring
gear
smoothly

Pinion

spline
does
not

disengage

smoothly

Seized

pinion
metal

EE
14
Repair

Repair

Adjust

Replace

Charge
battery

Repair
and

retighten

Retighten

Repair
or

replace

Repair
or

replace

Repair
or

replace

Repair

Repair

Repair
or

replace

Repair
or

replace

Replace

Replace

Replace

Replace

Repair
or

replace

Repair
or

replace

Replace

ENGINE
ElECTRICAL

SYSTEM

CHARGING
CIRCUIT

IGNITION

1

i
n

ITCH

r
B

i
i

vel

oU

ARMATURE

lip
J

l
t

lJ

FIEL

Df

e
I
I
3
2

I

u
P

5
0

IL
U
p

P
f

H
i

I

I

L

J

L
J

ALTERNATOR

VOL
TAGE

REGULATOR
The

charging
circuit

consists
of
the

battery
alternator

regulator
and

necessary
wiring
to
connect

these

parts
The

purpose
of
this

system
is
to
convert

mechanical

energy

from
the

engine
into

electrical

energy
which

is
used
to

operate
all

electrically
operated
units
and
to

keep
the

battery
fully
charged

When
the

ignition
switch
is

set
to
on

current
flows

from
the

battery
to

ground
through
the

ignition
switch

voltage

regulator
IG
terminal

primary
side
contact

point

PI

movable

contact

point
P2

voltage
regulator
F

terminal
alternator
F
terminal

field
coil
and
alternator

E

terminal
as
shown
in

Figure
EE
27

by
full

line
arrow

marks
Then

the
rotor
in
the
alternator
is
exited
On
the

other

hand
current
flows
from
the

battery
to

ground

through
the

ignition
switch

warning
lamp
voltage
regu

lator
L
terminal

lamp
side

contact

point
P4

movable
contact

point
PS
and

voltage

regulator
E

terminal
as
shown

by
dotted
line

arrow
marks
Then
the

warning
lamp
ligh
ts

When
the

alternator

begins
to

operate
three

phase

alternating
current
is

induced
in
the

armature
This

alternating
current
is

rectified

by
the

positive
and

negative

silicon

diodes
The

rectified
direct
current

output
reaches

the
alternator
A
and

E
terminals

On

the
other
hand
the
neutral

point
voltage
reaches

N
and
E

terminals

nearly
a

half
of
the

output

voltage
and

current
flows

from

voltage
regulator
N

terminal
to
E

terminal
or

ground
through
the
coil
VCI
as
shown
in

Figure
EE

28

by
the
dolled

line

arrow

marks
Then
the

coil
vc
I
is

excited
and
the

movable

contact

point
P5

comes
into
contact

with

voltage

winding
side
contact

point
P6
This
action

causes
to

turn
off
the

warning
lamp
and

complete
the

voltage

winding
circuit
as

shown

by
the
ullline
arrow
marks

When
the

alternator

speed
is
increased
or

the

voltage

starts
to
rise

excessively
the
movable
contact

point
P2

is

separated
from

the

primary
side
contact
P

1

by
the

magnetic
force
of

coil
V2

Therefore

register
RI
is

applied
into
the
field
circuit

and

output
voltage
is

decreased
As
the

outpu
t

voltage
is

decreased
the

movable

contact

point
P2

and

primary
side

contact
PI
comes

into

contact
once

again
and

the
alternator

voltage

increases

Thus
the

rapid
vibration

of
the

movable

contact

point
P2
maintains
an

alternator

output

voltage
to
constant

When
the

alternator

speed
is

further
increased
or
the

voltage
starts
to
rise

excessively
the

movable
contact

point

P2

comes
into
contact
with

secondary
side

contact

point
finally
Then
the

field
current
is
shut
off
and

alternator

output
voltage
is
decreased

immediately
This

action

causes
to

separate
movable
contact
P2
from

secondary
contact
P3

Thus
the

rapid
vibration
of
the

movable
contact

point
P2
or

breaking
and

completing

the
field
circuit
maintains
an
alternator

output
voltage
to

constant

j

T
SA

TIERY

I

l

e

7

Fig
EE
27

ChaTging
ciTcuit
1

EE
15

ENGINE

r

Ignition
switJ

c
o

iArm
ture

j

i
i
VC2
P

tP2
d

I
I

I

PI

I

ll
Rl

L

I
I

lRJ
t

R
I

Field

e
I

I

I
I

Ps
I

1
I
I

n
I

coil

M
4

i

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
ElECTRICAL
SYSTEM

CD
@

@
@

y

@
1

Pulley
assembly

2

Front
cover

3

Front

bearing

4

Rotor

5
Rear

bearing

6
Stator

7
Rear
cover

8
Brush

assembly

9
Diode
set

pl
te

assembly

10
Diode

cover

Jl

Through
bolt

EE031

Fig
EE
29

Exploded
view

of
altematoT

REMOVAL

3

Loosen
the

adjusting
bolt

@
o

lL
1
Disconnect
the

negative
battery
terminal

2
Disconnect

two
lead
wires

and
connector
from
the

alternator

4
Remove
the
alternator

drive
belt
@

J

5
Remove
the
alternator
installation
bolt

@@@

6
Dismount
the

alternator
from
the
vehicle

EE033

Fig
EE
JO
Removal

of
pulley

DISASSEMBLY

l
Remove
the

pulley
nut

pulley
rim
fan
and
the

spacer
the

brush
holder
cover
Remove

the
brush
holder
forward

and
remove
the
brushes

together
with
the
brush

holder

2
Remove
the
brush
holder

fixing
screws
and
remove
Note
Do
not
disconnect
N
term
inal
from
stator
coil
lead

wire

EE
17

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