light DATSUN B110 1973 Service Manual PDF

FUEL
SYSTEM

Checking
fuel
tank
vacuum
relief

valve

operation

Remove
fuel

filler

cap
and
see
if
it
functions

properly

as
follows

Wipe
clean
valve

housing
and
have
it
in

your
mouth

2

Inhale
air
A

slight
resistance

accompanied
by
valve

indicates
that

valve
is
in

good
mechanical
condition

Note

also
that

by
further

inhaling
air

the
resistance
should
be

disappeared
with

valve
clicks

3
If
valve

seems
to
be

clogged
or
if

no
resistance
is

felt

replace

cap
as
an
assembled
unit

1
1

1I

L

CD

hl

cv
CID

t

I
Valve

2
Valve

housing

I
I
Spring

Valve
seat

Fig
EF
40
Fuel

filleT
cap

EF
27
Checking
of
flow

guide
valve

1
Disconnect

all
hoses

connected
to
the

flow

guide

valve

2

While
lower

pressure
air
is

pressed
into

the
flow

guide

valve
from
the
ends

of
vent

line
of

fuel
tank
side

the
air

should

go
through
the
valve
and

flow
to

crankcase
side
If

the

air
does
not

flow
the
valve
should

be

replaced
But

when
the

air
is
blown

from
crankcase
side
it

should
never

flow
to
the

other

two
vent

lines

3
While
the

air
is

pressed
into

the
flow

guide
valve
from

carburetor
air
cleaner

side
it

flows
to
the

fuel
tank
side

and
or

crankcase
side

4
This

valve

opens
when
the

inner

pressure
becomes
10

romHg
0
4
in

Hg
In
case
of

improper
operations
or

breakage
replace
it

iFrom

r
carburetor

air
cleaner

From
fuel
tank

To

r
crankcase

j

iJ
i

ill

1
1

EC030

Fig
EF
4
J

Flow

guide
valve

ENGINE
ELECTRICAL

SYSTEM

2

Remove
two
bolts
llsed
to

secure
the

starting
motor

on
the

clutch

housing
Pull
the

starter

assembly
forward

and

remove
the

starting
motor

DISASSEMBLY

Remove
the
brush

cover
and
take
out
the

brush

6

Fig
EE
7

Removing
the

brush
cover

2
Loosen
the

nut
used

to
secure

the

connecting
plate

to
the

magnetic
switch
M

terminal
Remove

two
screws

used

to
secure
the

magnetic
switch

Remove
the

cotter

pin
and
withdraw

the
shift

lever

pin
Now

remove
the

magnetic
switch

Fig
EE
8

Removing
the

magnetic
switch

assembly

3
Remove

two

through
bolts

and

rear
cover
assembly

Remove
the

yoke
assembly
by

lightly
tapping
with
a

wooden
mallet
Fig
EE
9

Removing
the
brush
cover
and

yoke

assembly

4

Withdraw
the

armature

assembly
and

shift
lever

Fig
EE
l0

Removing
the
armature

assemlby
and

shift
lever

5

Remove
the

pinion
stopper
from
the
armature
shaft

end
To

remove
the

stopper
first

remove
the

stopper

washer
and

push
the

stopper
to
the

over

running
clutch

side
and
after

removing
the

stopper
clip
remove
the

stopper
together
with
the

over

running
clutch
Withdraw

the
over

running
clutch

assembly
from
the

armature
shaft

Fig
EE
11

Removing
the
over

running
clutch

assembly

EE
5

ENGINE
ElECTRICAL
SYSTEM

l

J
r

@

V

I

Fig
EE
14

Inspection
of
brush

spring
pressure

Armature

assembly

Check
external

appearance
of
the

armature
and
the

commutator

I
Measure
the

armature
shaft
for
bend

using
a

dial

gauge
Replace
the
armature
shaft
if

the
bend

exceeds

0

08
mm
0
0031
in

EE019

Fig
EE
15

Inspection

of
aTmatuTe

shaft
faT
bend

2

Inspect
the

commutator
If
the

surface
of
the

commutator
is

rough
smooth
it

lightly
with

a
No
500

emery
paper
Check
the
commutator
also
for

out
of

round
Ifthe
out
of
round
is
more
than
0
4

mm
0
0157

in
turn
the

commutator
armature
in

a
lathe

so
that
the

out
of
round
is

less
than
0

05

mm
0
0020
in
When

depth
of
mica
from
the
surface

of
commutator

segment
is
reduced
to
less
than
0
2

mm
0

0079
in

under
cut

the

mica
so

that

depth
is
in

range
from
0
5

to
0
8
mm
0
0197

to
0
0315
in

The

wear
limit
of
the

commutator
diameter
is
2
nun

0
0787
in
If

the
commutator
is

worn

excessively
repair

or

replace
it

Fig
EE
16

Inspection
of
commutator

f

L
I
C

9

File

4

J

Round
0
5
to
0
8
rom

Commutator

O

OI97tOO
0315m

S
t

egmen

1l1
Mica

Correct

Incorrect

EE021

Fig
EE
j
7

Undercutting
insulating
mica

3

Inspect
the
soldered
connection
of
armature
lead

and

commutator
If
loose

connection
is
found

resolder

using

rosin

flux

4

Testing
armature
for

ground

Place
one
test

probe
of
a

circuit
tester
on

to
arma

ture

shaft
and
the

other
on
to

each
commutator
bar

If
the

tester
shows

continuity
armature
is

grounded

Replace
the

armature
with
a

new

one

EE
7

ENGINE
ElECTRICAL
SYSTEM

shunt
coil
is

satisfactory
if
the

plunger
is
attracted

continuously

s

SERIES
COIL

S

SHUNT
COIL

Fig
EE
21

Inspecting
series
and
shunt
coils

When

measuring
the
L

dimension

depress
the

plunger

against
a
wall
and
measure
the

length
L

between

the

adjusting
nut
and

magnetic
switch
cover
as

shown
in

Figure
EE

22
and

adjust
if

necessary

II
L

T

Plunger
L
dimension

31
7
to
32
3
mm
1
248

to
1
272
in

I

11
I
Adjusting
nut

121
Plunger

adjuster

Fig
BE
22

Adjusting
L
dimension

REASSEMBLY

Reassemble
the

starting
motor
in

reverse

sequence
of

disassembly

When

assembling
be
sure
to

apply
grease
to
the

armature
shaft

spline
and

apply
oil
to
the
rear

cover
and

gear
case

bearing
metals
and

pinion
slightly
TEST

Performance

test

The

starting
motor
should
be

subjected
to
no
load

and
lock

torque
tests
whenever

it
has
been
overhauled

to
ensure
that
it

operates
correctly
when
installed
on
the

engine
The

starting
motor
should
also
be

subjected
to

these
tests
when
the

cause
of

abnormal

operation
is

to
be

determined
These
tests
are

summarized
as

follows

No

load
test

Connect
the

starting
motor
in
series
with

the

specified

battery
12
volts

and
an

ammeter

capable
of
indi

cating
1

000

amperes

Specified
current
draw

and
revolution
in
these

tests
are

shown

in

specifications
and
service
data

STARTER

MOTOR

s
SWITCH

o
BATTERY

EtJ

VOLTMETER
AMMETER

EE026

Fig
EE
2J
No
load
test

Torque
test

Torque
testing
equipment
should
be
used

to
measure

the

torque
the
motor
will

develop
A

high
current

carrying
variable
resistance

should
be
connected
to
the

circuit
so
that
the

specified
voltage
at
the

starting

motor

may
be
obtained
since

a
small
variation
in
the

voltage
will

produce
a

marked
difference
in
the

torque

development

Specified
power
voltage
and

torque
are
shown
in

Figure
EE
24

EE
9

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

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

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

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

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