lock DATSUN 510 1968 Service Owner's Guide

01
01

G

1
3

2
Co
er
gasket

3
Set
screw

4
Val
e
assembly

5
Val
e
gasket

6
Val
e
retelner

7
Retainer
screw

8
Elbow
connector

9
lower
body
assembly

With
arm

10
Rocker
arm
assembly

11
Rocker
arm
link

12
Complete
rocker
arm
and
link
13
Rocker
arm
pin

14
Rocker
arm
spnng

15
Dlephragm
assembly

16
Diaphragm
spring

17
Sehcrew

18
Fuel
pump
pecking

19
Fuel
pump
spacer

20
Spnng
lock
washer

21
Hex
nut

22
Fuel
pump
stud

23
Fuel
pump
stud
2

17

r
I
I
I
I

I
I

I
I
I

J

9
I

I
15
I
0
5

I

16
1i
20
21
g

tI
i

I
lb
18

22
23
r

70

CHAPTER

SEVEN

CD
1
Float
seat

2
Roat
3

Roat

stopper

4
Needle

valve

Starting
Interlock
Valve

Opening
Adjustment

Figure
10
shows

the
Interlock
valve

openmg

mechanISm
The
choke

valve
at
a
full

closed

pOSItion

automatIcally
opens
the

throttle
valve

at

a
16

degree

angle
for

startlng
ter
reassem

bly
or
to
set
the
interlock

opening

angle
bend

the

choke

connectlng
rod

so
that

a

fully
closed

choke

valve
will
leave

a
clearance

of
0
0512
m

1
3mm
between
the

choke
valve
and
the
throt

tle
chamber
ThIS

IS
shown

as
dImension
A
in

Figure
10

@

7

1
Crank

rod
6
Choke

connecting
lever

2
Choke

crank
le
er
7
Throttle
lever

3

Choke
lever
8
Throttle
chamber

4
Choke
VBI
e
9
Throttle
lever

5
Choke

connecting
rod
Interlock

Opening
of

Primary
and

Secondary
Throttle
Valves

Refer
to

Figure
11
The

primary
throttle

valve

should
be
at
a

degrees
When
the

adjust

plate

I

fixed
to
the

pnmary
throttle

valve
IS

open
to
a

degrees
It
comes
In
contact

WIth
the

connecting

lever
at

pOInt
A

When
the
throttle
valve
is

opened
further
where

the

connectIng
lever
IS
in

contact
With
the

stopper

POInt
B
the
connect

mg
lever
detaches

and
the

secondary
system
is

actllated
The

lInkage
between
the

pnmary
and

secondary
throttles

operates
properly
if
the
dis

tance

6etween

theilirotlle
valve
anainner
will

of
the
throttle
chamber
G
amounts

to
the
fol

lowmg
a

degrees
IS
59

degrees
DImenSIon
G

IS
03583
In
910mm

Figure
12
shows

the

measurement

bemg
checked

@

2

Secondary

I

1

Connecting
le
er

2
Return

plate

3

Adjusting

plate
4
Throttle

chamber

5
Throttle
valve

I

1

I

r

t
i
t
r

1
I

j

I

00

I
r
@

FUEL
SYSTEM
71

Dash
Pot

Adjustment

The

adjustment
of
the
dash

pot
IS
done

by

warmmg
up
the

engme
properly
and

checkIng
If

the
throttle
lever
touches
th
dash

pot
stem
as

the

engine
reaches
1
800
and
2
000

rpm
under

no
load
conditIons

Proper
contact
between
the

throttle
lever
and
the
dash

pot
stem

produces
a

normal
dash

pot
performance
Should
a
normal

mcrease
m

engme
speed
not
occur

adjust
the

dash

pot
as
follows

1
Loosen
the
dash

pot
locknuts

2
Rotate
the
dash

pot
nght
and
then
left

3

Adjust
the
dash

pot
so
that
the
throttle
lever

hIts
the
stem
between
1
800
and
2
000

rpm

4
Fasten
the
lock
nuts

securely

5
The
clearance
between
the
throttle
valve
and

the
throttle
chamber
wall
should
be
0
0709
m

0
8mm

or
10

degrees
In
throttle
valve

angle

MAJOR
CARBURETOR

SERVICE
PROCEDURES

A
carburetor
m

good
operatIng
condition
will

delIver
the

pr
per
gasolme
and
aIr
ratIos
for
all

engme
runnmg
speeds
A

gradual
declme
In

smoothness

response
and

power
Will
occur
as

the
carburetor

slIps
from

adjustment
and
Its
delI

cate

parts
become

dirty
and
worn
Overhaul

should

only
be

attempted
by
an

expenenced

mechanic

Accurate
calIbratIon
of

passages
and
dIS

charge
hole

reqUIre
that

extreme
care
be
taken

In

dISassembly
cleanmg
and

reassembly
Use

only
a

hIgh
grade
carburetor
cleaner
and
com

pressed
arr
to
clean

parts
and

passages
Never

use
wire
or
other

pOInted
Instruments
for
clean

ing
CalIbratIon
of
the
carburetor
will
be
af

fected
The

procedures
below
are

generally
true

for
all
models
As
an
aId

Figures
13
and
14
are

typIcal
examples
of
the
carburetors
used

Carburetor
Removal

1
Remove
the
au
cleaner

by
dIsconnectIng
all

hoses
attached
to
It

remoVmg
the
two
bolts

holdmg
the

aIr
cleaner
to
the

support
and

loos

enmg
the
band
bolt
at
the
base
of
the
aIr
cleaner

2
DIsconnect
fuellme
vacuum
Ime
and
choke

wire
u

eqUIpped
from
the
carburetor
3
Remove
the
throttle
lever

4
Remove
four
nuts
and
washers

holdmg
car

buretor
to
manIfold

5
Lift
carburetor
off
of
manuold

6
Remove
and
dIscard
carburetor
to
manuold

gasket

7
Place
carburetor
on
clean
workbench

Carburetor

Disassembly

1
The
maIn

Jets
slow

Jets
and
needle
valves
on

both
the

pnmary
and

secondary
systenIS
are

accessIble
from
outsIde
the
carburetor
Refer
to

FIgures
13
and
14
for
locatI
n

2
The
choke
chamber
can
be
detached

by
re

mOVIng
the

connectIng
rod

pump
connectIng

rod
return

sprmg
stop
pm
and
the

set
screws

I

that
hold

It
in

place

3
The

pnmary
and

secondary
emulSIon
tubes

can
be
disassembled

by
remOVIng
the
mam
air

bleeds

on
the

respectIve
SIdes

4

To
check
the
accelerator

pump
remove
the

cylInder
cover
Be
careful
not
to
lose
the

return

spnng
and
Inlet
valve
at
the
lower

part
of
the

pIston
durmg
dIsassembly

5
Detach
the
throttle
chamber
from
the
float

chamber

by
remOVIng
the
rod

lInkIng
the
dia

phragm
WIth
the

secondary
throttle
valve
and

the
four
screws
that
hold
It
However
It
IS

preferable
to
leave
the
throttle
valve
mtact
unless

absolutely
reqUired
If

It
IS

necessary
to
dlS

assemble
the
valve
It
should
be
Installed
so
that

the

secondary
throttle
valve
will
be

gap
free

OtherwIse
stable
Idle
and

good
slow

speed

performance
will
suffer

is
To
check
the
float
the
float
chamber
cover

must
be
removed

I

7
The

dIaphragm
IS
dIsassembled

by
removing

the
set
screws

holdmg
the

dIaphragm
chamber

cover
In

reassemblIng
the

diaphragm
be
careful

not
to
turn
the

edge
of
the

dIaphragm
up

8
In

dlsassemblmg
and

reassembling
the
mter

lockIng
lInks
take
care
so
that
each

lInkage
has

a
smooth
actIon
and
that

parts
are
not
forced

mto

pOSItIon

9
For
vehIcles

equipped
With
an
automatIc

choke
remove
the
brmetal

case

by
releasmg
the

set
screws
The
bimetal

1l
extremely
senSItIve

76
CHAPTER
SEVEN

Carburetor

Assembly

Assembly
is
the
reverse
of

dISassembly
Make

certam
all

gaskets
are
mounted
flat

Be
careful

not
to
use
force
In

assembly
Make
certam
that

all
Interlock
lInks

operate
smoothly

FUEL
TANK

Description

FIgures
15
16
17
and
18
are

exploded
views

of
the
fuel
tanks
used
on
the
sedan
and

wagons

Figure
15
IS
for
sedans

through
model

year
1969

Figure
16

applIes
to
sedans
from
1970
With

evaporative
control

system
F

q
nre
17
shows
the

statIon

wagon
through
1969

Figure
18

applIes

to
the

statIon

wagon
WIth

evaporative
control

system
f

m
1970
The
fuel
tank
for
the

pIck
up

is
shown
m

Figure
19

A
fuel
return

system
from
the
carburetor
to

the
fuel
tank

keeps
fuel
from

becommg
over

heated
m
the
carburetor
float
chamber
When

the
normal
level
m
the
float
chamber

IS
exceeded

a

pressure
valve

opens
and
returns
the
excess

fuel

to
the
tank

Removal
Sedans

1
Remove
drain

plug
m
bottom
of
fuel
tank
and

drain
the
fuel
into
a

suitable
safe
contamer

2
Detach
rear
seat
and
seat
back
See

Figure
20

3

Open
trunk
lId
and
remove
the
trunk
finISh

mg
board
4
DIsconnect
wire

leadmg
to
fuel

gauge
umt

5
DIsconnect
and
remove
the
fuel
inlet
tube

See

Figure
21

6
DIsconnect
rubber
tubes
of
fuel
outlet
and

fuel

return
lInes
from
the
tank

7
Remove
four

fixmg
bolts
and
lock
washers

from

edge
of
fuel
tank

8
Remove
fuel
tank
from
vehicle

Removal

Wagon

1
Remove
draIn

plug
from
bottom
of
fuel
tank

and
dram
the
fuel
mto

swtable
safe
contatner

2
Disconnect
WIre

leadIng
to
fuel

gauge
unit

3
Disconnect
and
remove
fuel
mlet
tube

4
DISconnect
rubber
tubes
of
fuel
outlet
and

fuel
return
lInes

5
Refer
to

Figure
22
Remove
four

fixing
bolts

holdmg
tank
in

place

6
Remove
fuel
tank
from
veh1c1e

8
1
Fuel
tank
Bssembly

2
Fue
tank
fixing
bolt

3
Fuel
tank
lock
washBr

4
Plain
washer

5
Filler
neck

6
Screw

7
Fuel
tank
filler
hOS8

8
Filler
cap
Bssembly
9
Packing

11
Floor
plug

12
BrBather
tube

13
Connector

14
T
tube

15
Clip

16
Fuel
tank
gauge
umt
17
Fuel
gaUgB
O
nng

18
Fuel
gauge
lock
plate

19
Hose
clamp

20
Earth
plate
mounting
bracket

21
Shim

22
Rubber
plug

23
Rubber
grommB

7

13
Id
@
t
I
l

I
1

23
29
30
i
@

24
t

I
1
Accelerator
pedal
ann
I

assembly

2
Accelerator
pedal
brecket

3
Packing

4
Snap
ling

5
Washer

17
ll
O
II
C
I
6
foot
rest

7
Screw

8
Bolt

9
Accelerator
pedel
stopper

bolt

10
Nut

11
Bell
crank
assembly

12
Bell
crank
bracket

20
L
13
Machme
screw

14
Screw
mechme

15
Lock
washer

12
From
Oct
ber
1969
I
16
Nylon
bushmg

1314
17
Snap
ling

If
3
0
18
Ball
Jomt
assembly

19
Ball
Jomt
assembly

15
20
Lock
nut

21
Accelerator
rod
boot

22
Balllomt
assembly

23
TorSIon
shaft

24
Accelerator
shaft
spring

25
PlaIR
washer

9
26
Colter
pm

do
27
Return
spllng

28
Accelerator
shalt
support

assembly

29
Bolt

II
30
Bolt

31
SPlIng
washer

32
Choke
control
wire

6
33
Choke
wile
knob

10
8
36
Rubber
grommet

7
I
I
er

CHAPTER
EIGHT

COOLING
SYSTEM

The

coolIng
system
IS
of
the
closed

pressure

type
Coolant
flows

through
passages
In
the

cyl

mder
head
and
block
and
is
cooled

by
the

radIator
water

pump
and
thermostat

Figure
1

mdlcates
normal
flow

The
radIator
is

a

corrugated
fin

type
wh1le

the
thermostat

IS
a

pellet
desIgn
The
water

pump

IS

centnfugal
and
has

an
alummum
dlecast

body

CD
Several

changes
have
been
made
in
the
water

pump
assembly
over
the

years
pnmanly
be

cause
of

changmg
ennSSlon
cootrol

require

ments
The
diSCUSSIOn
and

procedures
that
fol

low
cover
1970
and
1971

models
However

complete
IllustratIve
material

IS

given
for
all

model

years
so
that

dIfferences
can

readIly
be

identIfied
In
the
models
With
aIr

conditionmg

COOLING
SYSTEM
8S

and

In
those
with
exhaust
and

evaporatIve
emIS

sion
control
devIces
a
fan
clutch
IS
combIned

WIth
the
thermostat
to
detect

temperature
m
the

engme
compartlnent
When
the

temperature

nses
the
thermostat
detects
the

change
an
the

fan
clutch

engages
thereby
helpmg
to
cool
the

engme

WATER
PUMP

Figure
2

page
86
IS
an

exploded
drawmg
of

the
water

pump
and
fan

assembly
for
1970
to

1971
The

top
half
of
the
IllustratIon

applIes
to

those
models
WIth
exhaust
and

evaporatIve

emiSSIOn
control

systems
The
bottom
half
covers

models
WIth
a
crankcase

emiSSIon
control
deVIce

only

Figure
3

page
87

IS
an

exploded
drawmg
of

the
water

pump
and
fan

assembly
for
1968

models
Without
exhaust

or

evaporatIve
controls

Figure
4

page
88
shows
the
1968
model
With

emISSIon
control
deVIce
As

can
be
seen
from
the

illustratIons
most
dIfferences
eXISt
withIn
the

fan
clutch

assembly

Water

Pump
Removal

1
Remove

upper
and

lower
radIator
hoses
from

the
thermostat

housmg
and

cylmder
block
re

spectIvely
Dram
coolant
from
rad1ator
and

cylInder
block

2
Loosen
the
alternator

mountlng
bolt
and
the

adjustIng
bolt
on
the
alternator

mountIng

bracket

3
Move
the
alternator
toward
the

cylinder

block
untIl
slack
IS
eVIdent
10

the
fan
belt
Re

move
fa
belt
fro
alternator
water

pump
and

crankshaft

pulley

4
It
IS
difficult
to
remove
the
water

pump
from

the
front

housmg
With
the
radiator
and

top

shroud
10

place
so
remove
them

5
Remove
the
bolts

holdmg
the
fan

assembly

to
the
water

pump
and
remove
the
fan

assembly

6
Remove
the
bolts

holdmg
the
water

pump
to

the
front

housmg
as
shown
In

Figure
S

Water

Pump
Disassembly
Repair
and

Assembly

Disassembly
or

attempted
repaIr
of
the
water

pump
assembly
IS
not
recommended
If
the

pump
assembly
IS
corroded
the

vanes
are
dam
aged
or
the

bearmgs
are

nOISY

replace
the

entIre
umt

1

Inspect
the
water

pump
assembly
and

replace

If

reqUIred

2

If
the
water

pump
assembly
IS
stIll
serVIce

able
clean
It

thoroughly
before
mstallatIon

3
Assemble
the
water

pump
assembly
m
the

front
cover
10
the
reverse
order
for

disassembly

Do
not
reuse
old

gaskets

4

Replace
the
fan

assembly
on
the

water

pump

and
mstall
the
radiator
and

top
shroud

5

Inspect
the

fan
belt

carefully
for

SIgnS
of

wear

or
cracks
DIscard

It
If
10
doubt

6
Install
the
fan
belt
around
the
crankshaft

pulley
water

pump
pulley
and
the
alternator

pulley

7

Adjust
the
alternator
on
Its
bracket

so
there

IS
no
more
than
0
5
10

deflection
of
the
fan

belt
when

pushed
10

by
thumb

pressure

8

TIghten
alternator
bracket

adjustIng
bolt
and

alternator

mountmg
bolt

securely

9
Install
the

upper
and
lower
rad1ator
hoses

and

tIghten
securely

10
Refill
the
radIator
and

coolmg
system
With

approved
coolant

or
water

NOTE
Because

of
the

many
aluml

num

parts
In
the

engine
a

hIgh
qualIty

antI

freeze

compound
should
be
used

In
the

cooling
system

11
Start
the

engme
and
run
untIl

operatIng

temperature
IS
reached
or
untIl

you
re
sure
the

thermostat
has

opened
and
coolant
IS

CIrCulatIng

throughout
the
entIre

coolIng
system
Top
up

radIator
as

reqUIred

10

f
e

2
Weter
pump
gasket

3
Water
pump
tlXlng
bolt

4
Lock
washer

5
Water
pump
tlXlng
bolt

6
Hex
bolt

7
Hex
bolt

8
Lock
washer

9
Fan
pulley

10
Fan
clutch
assembly

11
Cooling
tan

12
Fan
lock
washer

13
Hex
bolt

14
Fan
belt

15
Dealing
assembly

16
Seal
assembly

17
Seatassembly

18
Lock
wire

19
Vane
assembly

20
Hub
pulley

24
Water
pump
seal
kit
Illl

t
l

10
9
8
n
o
o

19
1
Water
pump
assembly
11
lock
washer

2
Water
pump
body
12
Hex
bolt

3
Water
pump
ane
13
Hex
bolt
With
lock
washer

4
Water
pump
seal
14
loc
l
washer

17
6
5
Water
pump
beanng
15
Fan
and
water
pump
pulley

6
Water
pump
bee
ring
lock
16
Cooling
tan

7
Water
pump
hub
17
Fan
and
water
pump
lock

8
Water
pump
seat
washer

9
Water
pump
gasket
18
Hex
bolt

10
Hex
bolt
19
Fen
belt
I
I