fuel tank removal DATSUN B110 1973 Service Repair Manual

ENGINE
CONTROL
FUEL
EXHAUST
SYSTEM

R
H
drive
L
H
drive

KICK
DOWN
SWITCH

STRIKER
Pedal
free

play
mrn
in
2
0
0787
2

0
0787

Pedal
stroke

mm
in
48
1
890
50
1

969

Pedal

depressing
force

when
fully
open
3
8
8
4
3
3
7
3

kg
lb

Fig
FE
6

FUEL
AND
EXHAUST
PIPING

CONTENTS

EXHAUST
PIPE
AND
MUF
LER

Description

Precautions
for
removal
and

installation
FE
3

FE
4
FUEL
TANK
AND
PIPINGS

Description

Replacement

I

nspection
and

repair
FE
4

FE
4

FE
5

FE
S

FE
4

EXHAUST
PIPE
AND

MUFFLER

i

@

@

@

Fig
FE
Exhaust

system

FE

3

CHASSIS

Description

F
Of
aU
models
sedan
wagon
and

coupe
the
exhaust

system
uses
a

single
front
tube

without

using
the

pre
muffler
The
main
muffler
is
installed
beneath
the
rear

seat
floor
in
the
left
side

The

component
parts
are

separated
mainly
into
the

front
tube
and
muffler
with
rear
tube
and

they
are

coupled
with
a

dip
at
the
muffler
inlet
The
rnuffler
main

unit
is

suspended
from
the

body
with

hanger
bracket
and

rubber

ring
and
the

rear
tube
is

suspended
from
the

floor

with

strap

FUEL
TANK

AND
PIPING

Description
Precautions
for
removal

and
installation

When
there
is
no
clearance
between
the

front
tube

and
floor
or
propeller
shaft
turn
the
tube

along
center

line
of

tube
in
the
manifold
connecting
unil
and
obtain
a

proper
clearance

2
Muffler
front
tube
inserting
depth
is

approximately

60
mm
2
362
in

3
When

suspending
the
muffler
rnain
unit
with
rubber

ring
line

up
the

hanger
of
the

muffler
main
unit

straight

against
the
bracket
in

the
body
side

OJ

f

r

ii

7
0

i
i
c

5t

r

t5j
n

jJ

I

L

Fig
FE
8
Fuel

system

FE
4

BODY
ELECTRICAL

SPEEDOMETER

The

speedometer
is

equipped
with
a
total
odometer

which

records
travelled
distance

Replacement

1

When

removing
the

speedometer
remove
the
cluster

lid

first

Separate
the
combination
meter

housing
from
the

cluster
lid
after

removing
four
screws
and
remove
the

trip

recorder

reset
knob
if

any

2
Unscrew

two
screws
and
remove

the

speedometer

from
the
combination
meter

housing

3

Reinstall
a
new

speedometer
in

reverse

sequence
of

removal

Fig
BE
36

Removing
combination
meter

o

Fig
BE
37

Removing
sp
edometer
FUEL
GAUGE
AND

TEMPE

RATURE
GAUGE

Description

The
fuel

gauge
consists

of
a
tank
unit

located
in
the

fuel
tank

and
fuel
meter
The
tank
unit

detects
fuel
level

with
its

float
converts
fuel
level
variation
to

a
resistance

of
slide
resistor

installed
on
the
float
base

and
thus

controls
current

flowing
to
the
fuel
meter

The

temperature

gauge
consists
of

a
thermorneter
and

thermal
transmitter
located
in

the

engine
block
The

thermal
transmitter
is

equipped
with
a
thermistor
element

which
converts

cooling
water

temperature
variation
to
a

resistance
and
thus
the
thermal
transmitter
controls

current

flowing
to
the
thermometer

The
fuel
rneter
and
thermometer
are

provided
with

bimetal
a
and

heater
coil
When
the

ignition
switch
is

set
to
ON

current
flows
to
the
heat

coil
and
the
heat

coil
is

heated
With

this
heat
the
bimetal
arm
is

bent
and

thus
the

pointer
connected
to

the
bimetal

ann
is

operated

The
characteristics
ot
both

meters
are
same

A

tolerance

may
occur
on
the

thermometer
or

fuel

gauge
due
to

source

voltage
fluctuation
The

voltage

regulator
is
used
to

supply
a
constant

voltage
so
that
the

therrnorneter
and
fuel

gauge

operate
correctly
The

voltage
regulator
is
built
in
the
thermometer

The

operating
part
of
the

regulator
consists

of
a

bimetal
arm
and
a
heater
coil
When
the

ignition
switch
is

turned
on
the
birnetal
arm
is
heated
and
bent

by
the
coil

opening
the

contact

Consequently
current
to
the

coil
is

interrupted
As
the
bimetal

cools
the

contact
closes
The

repetition
of
this

operation

produces
a

pulsating
voltage

of
8V
which
is

applied
to

the

ternperature
and
fuel

gauges

If

both
thermometer
and

fuel
meters

become
defective

at
the

same
time

this

may
be
attributable
to
trouble
in

the

voltage
regulator

BE
19

BODY

REGULATOR

FUSE
M

TEMPE

RATURE

GAUGE
IGNITION

SWITCH

Lf

I

iT
Ji
1M

THERMAL
TRANSMITTER
I

J

0

I
GAUGE
TANK
UNIT

FUEL
TANK

Fig
BE
38
Circuit

diagram
for
fuel
gauge
temperature
gauge
and

voltage

regulator

Replacement

Remove
the

cluster
lid
first

2
Unscrew
two

screws
and
remove
the

thermometer
or

fuel
meter

from
the

combination
meter

housing

3
Reinstall
a
new
meter
in

reverse

sequence
of
removal

Fig
BE
39

Removing
thermometer

OIL
PRESSURE
AND

IGNITION
WARNING
LAMPS

The

engine
lubricating

system
incorporates
an
oil
pressure

warning
lamp
which

glows
whenever

engine
oil

pressure
falls
below
0
4

kg
ern
to
0
6

kg
em
5
7
to
8
5

lb

sq
in

When
the

engine
is

stationary
the

light
glows
with
the

ignition
switch
turned
on
When
the

engine
is

running
and

the
oil

pressure
reaches
the

circuit
is
broken
and
the

light

goes
out

J

u

fj
Warning
lig

2
Fuse

bSM
Q

f

t

J

without

pressu
re
with

pressure

Fig
BE
40
Circuit

of
oil

pressure
warning
system

Ignition
warning
lamp
glows
when
the

ignition
switch

is
set
to
ON
and
the

engine
is
not

operated
or
when
the

generator
fails
to

charge
with
the

engine
operated

BE
20

FUEl
SYSTEM

FUEL
STRAINER

DESCRIPTION

The

fuel
strainer
is
of
a

cartridge
type
It

uses

paper

element
as
strainer
element
which
can
be

checked
for

condition

from
outside
This
strainer
cannot
be
cleaned

Replace
the
strainer
at
the

specified
service
interval
or
if
it

becomes

clogged
or

restricted
REMOVAL

Disconnect
inlet
and
outlet

fuel
lines
from
fuel

strainer
and

remove
fuel
strainer

Note
Before

disconnecting
fuel
lines
use
a
container
to

receive
the

remaining
fuel
in
lines

r

@
I

I

Il
QY
I

I
I
elementl
3
Cover
@

EF005

Fig
EF
10
Sectional
view

of
caTtridge
type
fuel
stTaineT

FUEL
PUMP

CONTENTS

DESCRIPTION

FUEL
PUMP

TESTING

Static

pressure
test

Capacity
test
EF
5

EF
6

EF
6

EF
6

DESCRIPTION

The
fuel

pump
transfers

gasoline
from
the
tank
to
the

carburetor
in
sufficient

quantity
to
meet

engine
require

ments
at

any

speed
or
load

The
fuel

pump
is
of
the

diaphragm
type
REMOVAL
AND
DISASSEMBLY

INSPECTION

ASSEMBLY
EF
7

EF
B

EF
B

The
fuel

pump
consists
of
a

body
rocker

arm
and
link

assembly
fuel

diaphragm
fuel

diaphragm

spring
seal

inlet
and
outlet
valves

The
fuel

diaphragm
consists
of

specially
treated
rubber

which
is

not
affected

by
gasoline
held

together
with
two

metal
discs

and
a

pull
rod

EF
5

ENGINE

FUEL
PUMP

TESTING

A
fuel

pump
is

operating
properly
when
its

pressure
is

within

specifications
and
its

capacity
is

equal
to
the

engine
5

requirements
at
all

speeds
Pressure
and

cap
lcity
must
be

determined

by
two
tests

with

the

pump
mounted
on
the

engine
Be

sure
that

there

is

gasoline
in
the

tank
when

conducting
these

tests

Fig
EF
11
Schematic
view

of
fuel
pump

Static

pressure
test

The

static

pressure
test
is

conducted
as
follows

Disconnect
the
carburetor
fuel
line
at

the
carburetor

2
Install
the

necessary
adapter
and
tee

fitting
to
the

fuel
line

and
attach
a

suitable

pressure
gauge

Start
and
run

engine
at

varying
speeds

4

The

reading
on
the

gauge
is
the

static
fuel

pressure

and
this
should
remain
within
the

following
limits

0
18

kgJcm2
2

61b

sq
in

Pressure
below
the
lower
limit

indicates
extreme
wear

on
one

part
or
a
small
amount
of
wear

on
each

working

part

They
also
indicate
a

ruptured
diaphragm
worn

warped
dirty
or

gumming
valves

and
seats
or
weak
diaphragm
return

spring
Pressure
above
the

upper
limit

indicates
an

excessively
strong

diaphragm
that
is

too

tight

This
condition

requires
removal

of
the
fuel

pump
as

sembly
for

replacement
or

repair

Capacity
test

The

capacity
test

is
used

only
when
the
static

pressure

is
within

specifications
The

capacity
test
is
conducted
as

follows

1
Disconnect
the

fuel

pipe
at

the
carburetor

2

Place
a
suitable
container
at

the
end

of
the

pipe

3

Start
the

engine
and
run
at
1

000

rpm

4

The

pump
should
deliver
450
cc
I
V
S

p
of
fuel
in

one
minute

or
less

EF
6

FUEL
SYSTEM

If
no

gasoline
or

only
a
little
flows
from

open
end

of

pipe
the
fuel

pipe
is

clogged
or
the

pump
is
malfunction

ing
Before

removing
the

pump
remove
the

gas
tank

cap

disconnect
both
inlet
and
outlet

pipes
and
blow

through

them
with
an
air
hose

to
make
sure
that

they
are
clear

This
will
eliminate

possible
clogged
gas
strainer
in
the

fuel
tank
Reconnect
the

pipes
to
the

pump
and

retest

flow

REMOVAL
AND
DISASSEMBLY

Remove

the
fuel

pump
assembly
by
unscrewing
two

mounting
nuts
and
disassemble
in
the

following
order

1

Separate
the

upper
body
and
the

lower

body
by

unscrewing
the

body
set
screws

2
Take

off
the

cap
and
the

cap
gasket
by
removing
the

cap
screw

3
Unscrew

the
elbow
and
the

connector

4
Take

off
the
valve
retainer

by
unscrewing
two

valve

retainer

screws
Two

valves
are

easily
removed

@

@

GS
5
To
remove
the

diaphragm
diaphragm
spring
lower

body
seal
washer

and
lower

body
seal
from
the

lower

body
press
down

the

diaphragm
counter
to

the
force
of

the

diaphragm

spring
and
while

doing
this
cant
the

diaphragm
so
that
the

rectangular

part
in
the

lower
end
of

the

pull
rod
is

unhooked
from
the
rocker

arm
link

Fig
EF
jJ
StructuTe

of
fuel
pump

EF
7
j

i

I
of

4

Fig
EF
12
Pull
Tad
Temoval

r1
r

f
i

t

1

2

3

4

5

6

7

B

9

10

tt

t2

t3

t4

15

t6

t7

tB

t9

20

2t

22

23

24
Valve
assem

bly

Packing

Retainer

Screw

Cap

Gasket

Screw

Washer

spring

Rocker
arm

Rocker

pin

Rocker
arm

spring

Spacer

Diaphragm
assembly

Retainer

Diaphragm
spring

Washer

spring

Nut

Washer

plain

Gasket

Spacer

Complete
body
lower

Connector
inlet

Connector
outlet