1973 DATSUN B110 low oil pressure

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

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

CHASSIS

ENGINE
REMOVAL
AND
INSTALLATION

CONTENTS

PR
ECAUTIONS

REMOVAL
ERA

ERA

PRECAUTIONS

Be
sure
to
use
fender
cover

so
that
the

body
is

not

damaged

2
When

lifting
the

engine
or
when

jacking
up
the

engine
pay
attention
for

safety
and

carry
out

operation

correctly
so
that
the

parts
are
not

damaged

REMOVAL

I

Removing
hood

Open
the
hood

remove
four
installation
bolts
and

remove
the
hood

2
Disconnect

the

battery
cable
from
the
terminal

3

Removing
radiator

Drain
water

from
the

radiator
disconnect
two
radiator

hoses
remove

four
radiator
installation
bolts
and
remove

the
radiator

Fig
ER
8
Removin
radiator

4

Removing
cables
and
hoses

Disconnect
the

following
cables
hoses
and
wires

High
voltage
cable
between

ignition
coil
and

distribu
INSTAllATION
ER
6

tor

Cable
to
the
thermal
transmitter

Cable
to
the
oil

pressure
switch

Cable
to
the

primary
side

of
the
distributor

Cable
to
the

starting
motor

Fuel
hose

Cable
to
the
alternator

Heater
hose
for
model
with
heater

only

Wires

for
accelerator
and
choke
The

operation
will
be

carried
out

more

easily
by
removing
the
air
cleaner

Fig
ER
9

Right
side

of
engine
compartment

Fig
ER
10

Left
side

of
engine
compartment

ERA

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

The
clutch

drags
CHASSIS

Weakened
broken

ur
unhooked
clutch
with

drawallever
return

spring

Distorted
or
worn
drive

shaft

Excessive

play
of
release

bearing
on

slip

sleeve

Insufficient

push
rod

length

Excessive

pedal
free
travel

Warped
clutch
disc

Roughened
linings

Improperly
fitted
loose
or

broken

lining

Incorrect
release

bearing
to
diaphragm

spring

fmger
clearance

Clutch
disc
hub

forcing
on
drive
shaft

Damaged
drive

shaft

splines
prevent
the

clutch
disc

from

sliding

Oil
or

grease
on

linings

Warped
or

damaged
pressure
plate
or

clutch

cover

Air

pockets
in
the

hydraulic
system
not

bled

correctly

Dirt
or

foreign
matter
on

sealing
faces
of

master

cylinder
piston
cup

Air

pockets
in
master

cylinder
due
to
loose

piston

Fluid

leakage
from
cylinder

Low
fluid
level
in
reservoir

CL14
Replace
the

spring
or
hook

it

up
as

required

Replace
the
drive
shaft

and
clutch
disc
if

necessary

Replace
the
worn

parts

Adjust
the

push
rod

length
correctly

Adjust
free
travel
correctly

Set
level
of
clutch
disc
if

possible

Maximum

plate
run
out
0
25

mm
0

0098

in

Repolish
linings
with

a
metal
brush
or

replace
them
if

necessary

Replace
linings
Lining
rivets

should
be

clenched
with

no

protrusion
to
avoid

damaging

pressure
plate
and

flywheel

Adjust
correctly

Locate

cause
of
trouble
and

remove
it
if

possible
Otherwise

replace
the
clutch
disc

Replace
the
drive

shaft
also
the
clutch
disc

if

required

Locate
the
cause
of
oil
or

grease
leakage
and

correct
it
as

required

Clean
or

replace
linings

Replace
defective

parts

Bleed
out

completely

Clean

replace
piston
cup
if

damaged
and

bleed
the

system

Replace
piston
cup
and
bleed
the

system

Replace
piston
cup
if

damaged
bleed
the

system

Top
up
with
brake

fluid
and
bleed
the

system
if

necessary

CLUTCH

Clogged
vent
hole
in
reservoir

cap
promotes

vacuum

in
master

cylinder

allowing
air

to

inf1ltrate

past
the
seal

Abnormal

lining
wear

Insufficient

pedal
free
travel

The
clutch

grabs

The
clutch

slips
Driver

steps
unnecessarily
on

pedal
this

causes
lin

jog
wear

and

damage
to
release

bearing

Weakened

or

snapped
pressure
springs

Incorrectly
installed

linings

Oil
or

grease
on

flywheel
pressure
plate
and

linings

Loose

disc

linings
due

to

poor
rivet

tightness

Clutch
disc

hub
does
not

slide

freely
on

drive
shaft

spline

Warped
or
cracked

pressure
plate

Misalignment

Stiffened

hydraulic
control
mechanism

Wom
out

lining

Insufficient
clutch

pedal
return

travel
due

to
the
control
and

pedal
return

springs
being

weak
or

misadjusted

Weakened
or
broken

diaphragm
spring

Oil
or

grease
on

linings

eLl5
Clean
reservoir

cap
unclog
the
vent

hole
and

bleed

the

system

Adjust
clutch

pedal
free
travel

correctly

Advise
driver

to
discontinue

wrong

practice

and

step
on

clutch

pedal
only
when
ne

cessary

Check

pressure
springs
for
tension
as

speci

fied
and

replace
springs
if

they
are

unserviceable

Replace

linings
with
new
ones

and
install

them

correctly
Check
clutch
disc
for
center

alignment

Remove
cause

of

leakage
clean

flywheel
and

pressure

plate
thoroughly
replace
linings

If

linings
are
not
worn

replace
defective

rivets

Otherwise

replace
linings
and
clench

rivets

securely

Remove

any

foreign
matter
or

dirt

deposits

from
shaft

splines
When
trouble
is

still

present
replace
damaged
parts

Replace
pressure

plate

Locate
the
defective

point
and
if

possible

adjust
alignment
or

replace
distorted

parts

Check

spring
tension

If

necessary
take

down

pedal
and

lubricate

components

Install
new

linings
and

make
sure
tha

t
the

clutch

disc

pressure
plate
and

flywheel
are

not

damaged

Locate

cause
of
failure
and

replace
defective

springs

Overhaul
clutch
and

replace
springs

Remove
cause
of

leakage
and

replace
linings

if

cleaning
is

ineffective