1977 DATSUN PICK-UP engine

Underhood
air

I

@
Dr

Underhood
air

I
Engine
Fuel

f
f
l

l

ID
s

6

Cif

Ittl
ID
Air
inlet

pipe

Air
con
trol
valve

Hot
air

pipe

Diaphragm

Vacuum
hose

Diaphragm
spring

Air
bleed
valve

closed

Temperature
sensor

assembly
Holair

EF114

Fig
EF
2
Hota
r

delivery
mode

During
cold

engine
operation

7

To
manifold
Small

vacuum

1
Air
inlet

pipe

2
Air
con
trol

valw

3
Hot
air

pipe

4

Diaphnp

S
V
leuum
hoses

6

Diaphragm
prinl

7
Air

bleed
valve

closed

II

Temperature
senSOr

assembly

EF20S

Fig
EF
3
Cold
air

delivery
mode

During
cold

engine
operation

f
1

J
liP

omanifold
2

@
Air
inlet

pipe

Air

control
valve

Hot
air

pipe

Diaphragm

Vacuum
hoses

Diaphragm
spring

Air
bleed
valve

fully
open

8

Temperature
sensor

assembly

EF715

Fig
EF
4
Cold
air

delivery
mode

During
hot

engine
operation

ID

@
f

fjr

R
lfl
ow

2

underh
r
5

rv

Itti
ID

Hot
air
Air
inlet

pipe

Air
control
valve

Hot
air

pipe

Diaphragm

Vacuum
hose

Diaphragm
spring

Air
bleed
valve

partially
opened

8

Temperature
sensor

assembly

EF716

Fig
EF
5

Regulating
air

delivery
mode

EF
4
A
T
C
AIR
CLEANER

COLD
AIR
OPERATION

I

When
under
hood
air

temperature

is
low

The
sensor
air
bleed

valve
remains

in

the
closed

position
and
vacuum

passage
is

established
between
the
in

take
manifold
and

the
vacuum
motor

and
the
intake
manifold

vacuum
is

applied
to
the

vacuum
motor
dia

phragm
When
the

vacuum
is

small
or

when
the

engine
is

operating
under

eavy

1004
the
air

control
valve

opens

widely

irrespective
of
the

temperature

around
the

sensor
to
introduce
the

under
hood
air

cold
air

for
increased

power
of
the

engine

2

When
under

hood
air

temperature

is

high

The

sensor
air

bleed
valve

opens

fully
to
shut
off

the
vacuum

passage

between

the
intake
manifold
and
the

vacuum
motor
Due
to
the
force
of
the

vacuum
motor

diaphragm
spring
the

air

control
valve

closes
the
hot
air

pipe

of
the
air

cleaner
and

introduces
the

under

hood
air

cold
air

A
T
C
AIR
CLEANER

COLD

AND
HOT

AIR
OPERATION

When
the
sensor
air

bleed
valve
is

partially
opened
opening
of

the
air

control
valve
varies

with
the
vacuum

of
the

intake
manifold
With
the
air

control
valve
half
open

the
cold
air

and
hot
air
are
sucked

together
and

mixed
for

controlling
of
the
air

tem

perature
of
the
air

to
be
introduced
to

the
air

cleaner

TEMPERATURE
SENSOR

The

temperature
sensor
is

attached

to
the

inside
of
the
air

cleaner
The

bimetal
built
in

the
sensor
detects
the

under

hood
air

temperature
and

opens

or

closes
the
vacuum

passage
in
the

sensor

The
construction
of
the

tempera

ture
sensor
is
shown
in

the

following

CD
V
00
@

I

I

@
j
I

I

1
Protector
cover

Screw

Adjusting
frame

Air

temperature
bi

metal

Rivet

Valve
seat
frame

Lower
frame

Air
bleed
valve

Gasket

Fig
EF

6

Temperature
senior
EF206

VACUUM
MOTOR
AND

AIR
CONTROL
VALVE

The
vacuum

pressure
which
varies

with

opening
of
the
carburetor
throt

tle
acts

upon
the
vacuum
motor

dia

phragm
The
valve

shaft
attached
to

the

diaphragm
is
then
moved

up
or

down
in

response
to
the
vacuum
on

the

diaphragm
This
movement
of

the

valve
shaft

actuates
the
air
control

valve
to

control
the

temperature
of
the

air
to

be
introduced
into

the
air

cleaner

pr
to

I

1
Valve

spring

00
2

Diaphragm

@
3
Retainer

E
F

207
4
Valve
shaft

Fig
EF
7
Vacuum
motor

REMOVAL
AND

INSTALLATION

TEMPERATURE
SENSOR

Removal

Using

pliers
flatten

clip
con
Engine
Fuel

neeting
vacuum
hose
to
sensor
vacuum

tube

I

Pipe

2
Calch

3
Fixed
with

adhesive

4
Hose

5

Tab

6

Clip

7
Gasket

EC019

Fig
EF
B
Removal

of
semor

2

Disconnect
hose
from

sensor

3

Take
off

clip
from
sensor
vacuum

tube
and
dismount
sensor

body
from

air
cleaner

Note
The

gasket
between

sensor
and

air
cleaner
is
bonded
to
the
air

cleaner
side
and
should
not
be

removed

Inatallatlon

Mount
sensor
on
the

specified

position

For

mounting
position
of
sensor

see
the

following

EF717

Fig
EF
9

lalling
se
or
2
Insert

clip
into
vacuum
tube

of

sensor
After

installing
each
vacuum

hose
secure
hose
with
the

clip

Note
Be
sure
to
install
vacuum
hose

correctly
Correct

position
is
R

H

side
to
Nissan
mark
at
the

top

face
of

sensor
for
intake
manifold

L
H
side
for
vacuum
motor

VACUUM
MOTOR

1

Remove
screws

securing
vacuum

motor
to
air
cleaner

2
Disconnect
valve
shaft
attached

to

vacuum
motor

diapluagm
from
air

control
valve

and
remove
cacuum

motor

assembly
from
air

cleaner

3
To
install
reverse
the
removal

procedure

FRESH
AIR
DUCT

I
Disconnect
fresh
air
duct
at
air

cleaner

2

Fresh
air

duct
is

provided
with

projections
on
its
air
inlet
side
end

Hold
fresh
air
duct
with
a
hand
and

carefully

pull
out
from
radiator
core

support
while

turning
it
in
either

direction

3
To

install
reverse
the
removal

procedure
Be
sure
to

insert

projec

lions
of
fresh
air
duct

securely
into

mounting
hole
in

radiator
core

sup

port

EF518

EF
5
Fresh
air
duct

Air
cleaner

Duct

mounting
hole

Radiator

Radiator
core

support

Fig
EF

I0
Removal

of
fresh
air
duct

r

AIR
CLEANER

1
Loosen

bolts

securing
air
cleaner

to
air
cleaner
bracket

2
Loosen
air

cleaner
lock
bolt
and

remove
air

cleaner
from
carburetor

Disconnect
the

following
hoses
when

dismounting
air

cleaner

Under
hood
air
inlet

hose

Hot
air
inlet

hose

Vacuum

hose
Sensor
to
intake

manifold

Vacuum
hose
Sensor
to
vacuum

motor

Vacuum
hose

Idle

compensator
to

intake
manifold

Hose
Air

pump
to
air
cleaner

Hose
AB
valve

to
air
cleaner

Hose
Carburetor
to
air

cleaner

Blow

by
hose
Air

cleaner
to

rocker

cover

Hose
Air

control
vaive
to
air

cleaner
California

models

only

3
To

install

reverse
the
removal

procedure

INSPECTION

1
AIR
CLEANER

ELEMENT

Viscous

paper
type
air
cleaner

ele

ment
does
not

require
any
cleaning

operation
until
it

is

replaced
periodi

cally
Brushing
or

blasting

operation

will
cause

clogging
and

result
in
enrich

ment

of
carburetor
mixture

and

should
never
be

conducted
For

reo

placement
interval
of
air

cleaner
ele

ment
refer
to
Maintenance
Sched

ule

2
HOT

AIR

CONTROL
SYSTEM

In

warm
weather
it
is

difficult
to

find

out
malfunction
of
hot
air
control

system
In

cold
wea
thee

however

malfunction
of
air
control
valve

due
to

disconnection
or

deterioration
of

vacu

um

hose
between
intake
manifold
and

vacuum
motor
and

insufficient
dura

bility
of
air
control
valve

will
cause

insufficient
automatic
control

opera

tion

for
intake
air
and

result
in

engine

disorder

including

I

Stall

or
hesitation
of

engine

oper

ation

2

Increase
in

fuel

consumption

3

uck
of

power
Engine
Fuel

These

phenomena
reveal
malfunc

tion
of
hot
air
control

system
If
these

phenomena
should
occur
check
hot

air
control

system
as

described
in
the

following
before

carrying
out

inspec

tion

of
carburetor

2
1
Vacuum

hose

Intake
manifold
to
3

way
connec

tor
3

way
connector
to

temperature

sensor
3

way
connector
to

idle
com

pensator
temperature
sensor
to
vacu

um

motor

I

Check
that

vacuum
hoses
are

se

curely
connected
in

correct

postion

2

Check
each
hose
for

cracks
or

distortion

hose

clip
for

condition

Note

Vacuum
hose

position
R
H

side
of
Nissan

mark
on
the

top
of

sensor
is
for

intake
manifold
L
U

side
of

the
mark

is
for

vacuum

motor

2
2
Vacuum

motor

I

With

engine
stopped
disconnect

fresh
air

duct

Place
a
mirror

at
the
end
of
air

cleaner
inlet

pipe
as
shown
and

check

to

see
if
air

con
trol
valve

is
in

correct

position

EF213

Fig
EF
11

Inspecting
valve

position

Air

control
valve
is
in

correct

posi

tion
if
its
under
hood
air

inlet
is

open

and
hot
air
inlet
is

closed
Check
air

control
valve

linkage
for

condition

2

Disconnect

vacuum
motor
inlet

vacuum
hose
and
connect

another

hose
to
the
inlet
to

apply
vacuum
to

vacuum
motor
Vacuum
can
be

ap

plied
by
breathing
in
the

hose
end

as

shown

Place
a
mirror

at
the

end
of
air

cleaner
inlet

pipe
and

check
to

see
if

air

control
valve

is
in
correct

position

EF
6
EF217

Fig
EF
12

Inspecting
valve

position

Correct

position
of
air

control
valve

is

the
reverse
of

paragraph
J
above
Air

control
valve
is
in
correct

position
if

under
hood
air
inlet
is

closed
and
hot

air

inlet
is

open

3
With

hot
air

inlet
in

open
posi

tion

as
described
in

paragraph
2

above

pinch
vacuum
hose
with

fingers

and
cut
off
air

from
vacuum
hose
In

this
condition
check
that
air

control

valve

maintains
the

condition
de

scribed
in

step
2

for
more
than
30

seconds
and
that
hot
air

inlet
is

open

If

diaphragm
spring
actuates
the
air

control
valve

by
its

spring
force
to

open
under
hood
air
inlet

within
30

seconds

replace
vacuum
motor
as
an

assembly
since
this

may
be

resulted

from

air
leak
at
vacuum
motor
dia

phragm

2
3
Temperature
ensor

Check

temperature
sensor
for
func

tion

by

proceeding
as
follows
Be

sure

to

keep
engine
cold
before

starting

test

I

With

engine
off

check
air

control

valve
for
condition
In

this
case
under

hood
air

inlet
is

open
Use
a
mirror

for

inspection
as
2
2
1

above

2

Start

engine
and

keep
idling

Immediately
after

engine
starting

check
air
control
valve
for

correct

position
as
described
above
In

this

case
correct

position
of

air
control

valve

is
the
reverse
of
2
2
I

under

hood
air

inlet
is

closed
and
hot

air

inlet
is

open

3
Check
that
air
control
valve

grad

ually
opens
to
under
hood
air

inlet

side
as

engine
warms

up
When
en

vironmental

temperature
around
tern

perature
sensor
is

low

spend
more

time

for

engine
warming
up
operation

to

facilitate
smooth

operation
of
air

control
valve

If
the
above
test
reveals

any
prob

lem

in
the

operation
of
air

control

valve

carry
out
the

following
test

4
Remove
air

cleaner
cover
Set

temperature
sensing
element
of
ther

mistor
or

thermometer
to
a

position

where

temperature
around
sensor
can

be

measured
In

this
case
fIx

wiring
of

thermistor
or

thermometer
on
the

bottom

surface
of
air

cleaner
with

adhesive

tape
in

such
a
manner
that

the

set

position
of

temperature
sensing

DESCRIPTION

OPERATION

DESCRIPTION

The
idle

compensator
is

basically
a

thermostatic
valve

which
functions
to

introduce
the
air

directly
from
the
air

cleaner
to
the

intake
manifold
to

compensate
for
abnormal
enrichment

of
mixture
in

high
idle

temperature

The
bi
metal

attached
to
the
idle

compensator
detects

the

temperature

of
intake
air
and

opens
or
closes
the

valve
Two

idle

compensators
having

different

temperature
characteristics

are

installed
one

opens
at
an
intake
air

temperature
of

60
to
700C
140
to

l580F

and
the
other
at
70

to
900C

158
to
1940F

OPERATION

The
construction
of
the
idle

com

pensator
is

shown
in
the

following
Engine
Fuel

element
will
not
be
affected

by
air

flow

Then
install
air
cleaner
cover

Fig
EF
13

Checking
temperature

sensor

IDLE
COMPENSATOR

CONTENTS
5

Carry
out
test
as
described
in

steps
I
2
and
3
above
When
air

control
valve

begins
to

open
to
under

hood
air
inlet
side
several
minutes

after

engine
starting
read
the

indica

tion

of
thermistor
or

thermometer
If

reading
falls
within
the

working
tern

perature

range
of

temperature
sensor

the
sensor
is

normal
If

reading
ex

ceeds
the

range

replace
the

sensor

with
new
one

Note
Before

replacing
temperature

sensor
check

idle

compensator
as

described
in

Idle

compensator

EF
7

EF
7
REMOVAL
AND
INSTALLATION

INSPECTION
EF

B

EF

8

q

EF222
1

Orifice

2
Bi
metal

3
Rubber
valve

Fig
EF

14
Structure

of
idle

compensator

Bi

metal
Intake
air

temperature

No

1
Below
600C
1400F

60
to
70
C

140
to
l580F

Above
700C

158
OF

Below
700C

1580F

70
to
900C

158
to
1940F

Above
900C
1940F
No
2

EF
7
The
idle

compensator

operates
in

response
to
the

under
hood
air

temper

ature

as
shown
below

Idle

compensator
operation

Fully
closed

Close
to

open

Fully

open

Fully
closed

Close
to

open

Fully

open

Engine
Fuel

REMOVAL
AND
INSTALLATION

Remove
air
cleaner

cover

2
Remove
hose

connecting
idle

compensator
and
3

way
connector

3
Loosen
screws

securing
idle
com

pensator
to
air

cleaner
then
remove

idle

compensator

Notes

a
When

removing
idle

compensator

remove

gasket
and

plate

b
When

removing
screw

securing
idle

compensator
to
air

cleaner
be
care

ful
not
to

miss
the
saew

4
To
install
reverse
the
removal

procedure

INSPECTION

I
Check

tha
t
valve
IS
m
closed

position
when
bi

metal

temperature
is

lower

than

operating

temperature
To

check
breathe
air
into

tube
or
suck

DESCRIPTION

The
fuel
fJlter
is

a

cartridge

type
It

uses
a

paper
element
which
can
be

checked
for
condition
from
the
out

side
EF718

Fig
EF
15
Location

of
idle

compenl
otor

air
If
excessive
air

leakage
is
found

at

the
valve

replace
idle

compensator
as

an

assembly
Note
that
two
idle
com

pensators
are
mounted
to
air
cleaner

and
that
it
is

necessary
to

plug
the

valve
of
one
of
these
idle

compensa

tors
so
as
to

prevent
air
leak
while

checking
the
other
one

@

CD

I

tl

1
Orifice

2
Rubber
valve

EF225

Fig
EF

16
Checking
idle

compelll
lor

FUEL
FILTER

1

Body

2

Paper
element

3
Cover
1

EFOO5

Fig
EF

18
Sectional
view

of
cartridge

type
fuel
filter

EF

8
Note

When

checking
idle

compensa

tor
on
vehicle
disconnect
hose

leading
to
idle

compensator
and

connect
other
hose
then

carry
out

check
as
descn
bed
above

2

When
bi
metal

temperature
is

above
the

specified
operating

tempera

ture

visually
check
to
see
if
the
valve

is
in

open
position
If

valve
is
not

open
replace
idle

compensator
as
an

assembly

Watcr

temperature
Observe

valve

11t
No

1
Bknctal

60
to
70De

140
to
1580F

NO
2
Bi
metal

70
to

900C

158to
1940F

EF226

Fig
EF
17

Checking
idle

compensator

3
Others

I
Check

hoses
for

correct
installa

tion

distortion
or
cracks

2

Check
rubber
valve
seat
of
idle

compensator
for

sticking
or

any
other

faulty
conditions

REMOVAL

Disconnect
inlet
and
outlet
fuel

lines
from
fuel

fJlter
and
remove
fuel

fJlter

Note

Before

disconnecting
fuel
lines

use
a
container
to

receive
the
fuel

remaining
in
lines

DESCRIPTION

FUEL

PUMP
TESTING

STATIC
PRESSURE
TEST

CAPACITY
TEST

DESCRIPTION

The
fuel

pump
transfers
fuel
from

the
tank
to
the
carburetor
in
sufficient

quantity
to
meet
the

engine
require

ments
at

any
speed
or

load

The
fuel

pump
is
a

pulsating
type

designed
for

easy
maintenance
It

con

sists
of
a

body
a

rocker
arm

assembly

a

fuel

diaphragm
a
fuel

diaphragm

spring
seal
inlet
and
outlet

valves

Figure
EF
19

shows
a
cross
sectional

view
of
the

pump

The
fuel

diaphragm
consists

of

specially
treated
rubber
which
is

not

affected

by

gasoline
and
held
in

place

by
two

metal
discs
and

a

pull
rod

FUEL

PUMP

TESTING

A
fuel

pump
is

operating

properly

when
its

pressure
is

within

specifica

tions

and
its

capacity
is

equal
to
the

engine
s

requirements
at
all

speeds

Pressure
and

capacity
must
be
deter

mined

by
two
tests
while
the

pump
is

still

mounted
on
the

engine
Be
sure

there
is
fuel
in

the
tank
when

carrying

out
the
tests
Engine
Fuel

MECHANICAL
FUEL
PUMP

CONTENTS

EF
9

EF
9

EF
9

EF
10
REMOVAL
AND
DISASSEMBLY

INSPECTION

ASSEMBL
Y
EF

10

EF
10

EF

11

1

1

Outlet
valve

2

Diaphragm

3

Diaphragm
spring

4
Inlet
valve

S
Rocker
ann
EF006

Fig
EF
19
Schematic
view

of
fuel
pump

STATIC
PRESSURE
TEST

The
static

pressure
test
should
be

made
as
follows

I
Disconnect
fuel
line
between
car

buretor
and
fuel

pump

2
Connect
a
rubber
hose
to
each

open
end
of
a
T
connector
and
con

nect
this
connector
hose

assembly
be

tween
carburetor
and
fuel

pump
Note
Locate
this
T
connector
as

close
to

carburetor
as

possible

3
Connect
a

suitable

pressure
gauge

to

the

opening
of
T
connector
and

fasten
hose
between
carburetor
and

T
connector
with

a

clip
securely

EF
9

4

Run
the

engine
at

varying
speeds

5

The

pressure
gauge
indicates

static
fuel

pressure
in
the
line

The

gauge
reading
should
be

within
the

following
range

0
21
to
0

27

kg
em2

3
0

to
3

8

psi

Note
If

the
fuel
in
carburetor
float

chamber
has
run
out

and

engine
has

stopped
clip
and

pour
fuel

into

carburetor
Fasten

clip
secure

ly
and

repe
1
static

pressure
test

Pressure
below
the
lower
limit
indi

cates
extreme
wear
on
one

part
or

a

small
amount
of
wear
on
each

working

part
It

also
indicates

ruptured
dia

phragm
worn

warped
dirty
or

gum

ming
valves
and
seats
or
a
weak

diaphragm
return

spring
Pressure

above
the

upper
limit
indicates
an

excessively
strong
tension
of
dia

phragm
return

spring
or
a

diaphragm

that
is
too

tight
Both
of
these
condi

tions

require
the
removal
of

pump

assembly
for

replacement
or

repair

CAPACITY
TEST

The

capacity
test
is

made

only

when
static

pressure
is
within
the

specifications
To

make
this
test

pro

ceed

as
follows

1

Disconnect

pressure
gauge
from

T
connector
and
in
its
vacant

place

install
a

suitable
container

as
a
fuel

sump

2
Run

engine
at
1

000

rpm

3
The

pump
should

deliver
1
000

cc

2
11

US

pt
of
fuel
in

one
minute
or

less

If
little

or
no
fuel
flows
from
the

open
end
of

pipe
it
is
an

indication

that
fuel
line
is

clogged
or

pump
is

malfunctioning

REMOVAL
AND

DISASSEMBLY

Remove
fuel

pump
assembly
by

unscrewing
two

mounting
nuts
and

disassemble
in

the

following
order

1

Separate

upper
body
and
lower

body
by

unscrewing
body
set
screws
Engine
Fuel

2

Take
off

cap
and

cap
gasket
by

removing
cap
screws

3
Unscrew
elbow

and
connector

4
Take
off
valve

retainer

by
un

screwing
two
retainer

screws
and
re

move
two
valves

5
To
remove

diaphragm

press

down
its

center

against
spring
force

With

diaphragm
pressed
down

tilt
it

until
the
end
of

pull
rod
touches
the

inne

wall
of

body
Then
release

diaphragm
to
unhook

push
rod
Be

careful

during
this

operation
not
to

damage
diaphragm
or
oil
se
L

i
J

EFOO7

Fig
EF

20
Remouing
pull
rod

6
Drive
rocker
arm

pin
out
with
a

press
or
hammer

8

o

6

7

8

@

INSPECTION

I

Check

upper
body
and
lower

body
for
cracks

EF
10
I
fuel

pump
cap

2

Cap
gasket

3
Valve

packing

4

fuel

pump
val
e

assembly

S
Valve
retainer

6

Diaphragm
assembly

7

Diaphragm
spring

8
PuRro

9

Lower
body
seal

washer

10
Lower
body
seal

11
Inkl
connector

12
Outlet
connector

13
Rocker
arm

spring

14
Rocker
arm

I
S
Rocker

artyl
side

pin

16
Fuel
pump
packing

17

Spacer
fuel

pump

fo
cylinder
block

EF510

Fig
EF
21
Slruc
ure
of
fuel

pump

2
Check

valve
assembly
for
wear
on

valve
and
valve

spring
Blow
valve

assembly
with
brea
th
to
examine
its

function

3
Check

diaphragm
for

small
holes

carcks
or
wear

4

Check

rocker
arm
for
wear
at
the

mating
portion
with

camshaft

5

Check
rocker
arm

pin
for
wear
A

worn

pin
may
cause
oil

leakage

6
Check
all

other

components
for

any
abnormalities
and

replace
if
neces

sary

DESCRIPTION

INSPECTION

REMOVAL
AND

INSTALLATION

DESCRIPTION

The
electric
fuel

pump
is

adopted

on
air

conditioner

equipped
models
Engine
Fuel

ASSEMBLY

Reverse

the
order
of

disassembly

Closely
observe
the

following
instruc

tions

L

Use
new

gaskets

2

Lubricate
rocker
ann
rocker
arm

link
and

rocker
arm

pin
before
installa

tion
3

To
test
the

function

proceed
as

follows

Position
fuel

pump
assembly
about

I

meter
3
3
ft

above
fuel
level
of

fuel

strainer
and
connect
a

pipe
from

strainer
to
fuel

pump

Operate
rocker

arm
by
hand
If

fuel

is

drawn

up
soon
after
rocker
arm
is

released

fuel

pump
is

functioning

properly

ELECTRIC
FUEL
PUMP

CONTENTS

EF
11

EF
11

EF
12
DISASSEMBL
Y

ASSEMBL
Y

TROUBLE

DIAGNOSES
AND

CORRECTIONS
EF
12

EF
12

The
silicon
transistor

type
fuel

pump

consists
of

a
transistor
diodes
a

sole

I
Tr

lOsistor

6
Ou
tIet
valve

2

Plunger

7
Return

spring

3

Diaphragm

8
Filter

4

Diode

9

Magnet

5

Magnet
coil

10
Inlet
valve

INSPECTION

I
Disconnect
fuel
hose
at

pump

outlet

2

Connect

a
suitable
hose

approxi

mately
6

mm
0

24
in
inner

dia

meter
to

pump
outlet
ev
J

J

Note
If
diameter
is
too
small
the

following

proper
delivery

capacity

cannot
be
obtained
even
if

pump

functions

properly

EF
11
EF
13

noid
a

pump
mechanism
and
filter

parts

I
T
nsistor

2

Re
ist
f
I

3
Dinde

4

Signal
coil

5
Main
coil

6
Resistor
3

7
Zener
dlOdl

8

Resistor
2

EF719

Fig
EF
22
Construction

of
electric

fuel

pump

3

With
hose
outlet
in
a

higher
posi

tion

than

pump

operate
pump
and

check

delivery
capacity
for
more
than

15

seconds

4

The

capacity
should
be
I
400

cc