air filter DATSUN B110 1973 Service User Guide

ENGINE

Step
system

The
construction
of
this

system
corresponds
to

the

idling
and
slow
system
of
the

primary
system

This

system
aims
at
the

power

filling
up
of
the

gap

when
fuel

supply
is

transferred
from
the

primary

system
to
the

secondary

system
The

step
port
is

located

near
the

auxiliary
valve
in
its

fully
closed

state

Anti

uesetmg

solenoid

Ignition
switch

OFF
ON

I

L
i1

7

I
Anti

dieseling
solenoid

valve

When
the

ignition
key
is
turn

to
OFF

current
will

not
flow

through
the

solenoid
and
the
slow

system
fuel

passage
is

closed
to
shut
down

the

engine
without

dieseling

If
anti

dieseling
solenoid
is
found

defective

replace
the

solenoid
as
an

assembled
llnit

Fuse

Ignition
switch

T
Baitery

717

Fig
EF
20
Schematic

drawing
of
anti

dieseling
solenoid

Removal
and

installation
of
anti
dieseling
solenoid

Removal

Solenoid
is

cemented
at

factory
Use

special
tool

STl9
I

50000
to

remove
a

solenoid

When

this
tool
is

not
effective
use
a

pair
of

pliers
to

loosen

body
out
of

position

Installation

I

Before

installing
a
solenoid
it
is
essential

to
clean
all

threaded

parts
of

carburetor
and
solenoid

Supply

screws
in
holes

and
turn
them
in

two
or
three

pitches

2

First
without

disturbing
the

above

setting
coat

all

exposed
threads
with
adhensive
the
Stud
Lock
of

LOCTlTE
or

equivalent

Then

torque
screws
to
35
to
55

kg
cm
30
to
48

in
lb

using
a

special
tool
STl9150000

After

installing
anti

dieseling
solenoid
leave

the

carburetor

move
than
12
hours
without

operation

3
Mter

replacement
is

over
start

engine
and
check
to

be

sure
that
fuel
is
not

leaking
and
that
anti

dieseling
solenoid
is
in

good
condition
Notes
a
Do
not
allow
adhesive

getting
on
valve

Failure
to
follow
this
caution
would
result
in

improper
valve

performance
or

clogged
fuel

passage

b

In

installing
valve
use
caution
not
to
hold

body
directly
Instead

use
special
tool

tight

ening
nuts

as

required

Float

system

Fuel
fed
from
the

fuel

pump
flows

through
the
filter

and
needle
valve
into
the
float
chamber
A
constant
fuel

level
is
maintained

by
the
float
and

needle
valve

As
ventilation
within
the
float

chamber
is
of
an

air
vent

method

Electric
automatic
choke

An
electric
heater

warms
a

bimetal
interconnected
to

the
choke
valve
and
controls
the

position
of
choke
valve

and
throttle
valve
in
accordance
with
the

elapse
of
time

or

the
warm

up
condition
of

engine

The
construction
and
function
of
each

part
of
this

automatic

choke
are

as
follows
See

Figure
EF
21

EF
12

ENGINE

Y
Q

0

Fig
EF
34

Disassembling
accelerator

pump
and

hi
metal
cover

1

EC013

Fig
EF
35

Removing
throttle
chamber

9

The
throttle
chamber
can
be
detached
from
the
float

chamber

by
removing
three
set
screws

Do
not
remove
anti

dieseling
solenoid
unless
it
is

necessary
to

change
If

necessary
refer
to
the
item
of

Anti

dieseling
solenoid

page
EF

12

10
It
is

preferable
to
leave

throttle
valve

intact
unless

otherwise

required
If

throttle
valve

must
be
disassembled

to
remedy
a
defect

secondary
throttle
valve

must
be

installed
with

gap
to
be
free

Otherwise

stable

idling
and
slow

speed
performance

will
not
be

obtained
I

o

rJ

01

o

o

Fig
EF
36

Removing
throttle
valve

II
In

disassembling
and

reassembling

interlocking

links
take

care
so
that
each

linkage
has
a
smooth
action

and
that

it
is
not
fitted
in

any
forced

position

Cleaning
and

inspection

Dirt

gum
water
or
carbon
contamination
in
or
on
the

exterior

moving
parts
of
carburetor
are
often

responsible

for

unsatisfactory
performance

For
this
reason
efficient
carburetion

depends
upon

careful

cleaning
and

inspection
while

servicing

1
Blow

aU

passages
and

castings
with

compressed
air

and

blow
off
all

parts
until

dry

Note
Do
not

pass
drills
or
wires

through
calibrated

jets

or

pssages
as

this

may
enlarge
orifice
and

seriously

affect
carburetor
calibration

2
Check
all

parts
for
wear

Replace
worn

part
Especial

ly
the

following
matters
should
be
noted

I
Check
float
needle
and
seat
for
wear

Replace
the

assembly
if
worn

2

Check
the
throttle
and

choke
bores
in

throttle

body

and

cover

casting
for
wear
or

out
of
round

3

Inspect
idle

adjusting
needles
fur
burrs
or

ridges

Replace
as

required

3

Inspect
gaskets
to
ensure
that

they
do
not

appear

hard
or

brittle
and
that
the

edges
are
not
turned
or

distorted
If

any
such
condition
is

detected

they
must
be

replaced

4

Check
fIlter
screen
for

clogging
Clean
and
if
it
is

distorted
or
remains

plugged
replace

EF
20