DATSUN 510 1968 Service Manual Online

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
19
21
20
I
13

11

12
I
14

L
1

A
21

I

26

TO
CRANK
CASE
@

1
Fuel
tank
assembly

2
Drain
plug

3
Drain
packing

4
Fuel
tank
filler
neck

5
Screw

6
Fuel
tank
filler
hose

7
Hose
clamp

8
Hose
clamp

9
Filler
cap
assembly

10
Filler
cap
packing

11
Fuel
tank
gauge
umt

12
0
ring

13
Fuel
geuge
loc
l
plate

14
H
bolt

15
Plain
washer

16
Spnng
wesher

17
Fuel
gauge
earth
plale

18
Rubber
plug

19
Tank
reseNOlr
essembly

20
H
bolt
With
washer

21
Plein
washer

22
Breather
tube

23
Breather
tube

24
Breether
tube

25
Nylon
clip

26
Rubber
grommet

27
Shim
QD
g

j

1
fual
un
l
esselllbl
J

2
1
leln
91Ug

3
peckIng

4
fueltenIl
IIIIBI

S
flllerMse

6
Bl8et
e1
tube
1
fIller
cep
essemblY

S
Geuge
essemblY

9
fuel
geuge
o
rIng

10
fuel
geUie
IOc
l
pIe

11
pec
l
n

12
filler
tube
protector
essemblY
@

o
8
9

4
3

1r
2

p
l
I
l

QO

@

15

I
1
Fuellank
assembly

17
8
2
Fuel
tank
drain
plug

3
Packing

4
Weld
nul

5
Plain
washer

6
Spllng
washer

7
Hex
bolt

33
8
Upper
filler
tube
assembly

9
Filler
hose
assembly

10
Hex
nut

11
Plain
washer

U
12
Spllng
washer

25
13
Machine
screw

rt
41
40
14
Hose
clamp

2i
15
Filler
cap
assembly

27
J
16
Filler
cap
packing

L
1
17
Filler
neck
packing

21

35
20
Fuel
gauge
O
lIng

20
21
Fuel
tank
gauge
Unit

23
Tank
reservoll
assembly

24
Spllng
washer

25
Screw

26
Breather
tube

27
Breather
tube

28
Breather
lube

29
Breather
tube

30
Breather
tube

31
Breather
tube

32
Breather
tube

33
Breather
tube
assembly

34
flexible
hose

35
Flexible
hose

36
flexible
hose

37
Fuel
tank
to
crankcase
tube
a

39
Reservoll
pipe
assembly

TO
CR
CASE
I
Y
40
Hose
clamp

41
Hose
clamp

I
42
Hose
clamp

37
30
1
43
Machine
screw

44
Spllng
washer
rIJ

45
Rubber
grommet

I
fi

j

fUEL
SYSTEM

@

@

To
Cl
8nkcaS8

J
t
of

I

4

l

t

rr

E
81

82

CHAPTER
SEVEN

Removal

Pick

up

The
fuel
tank

IS
mstalled

along
With
the

vapor

liqUid
separator
A

cover
m
front
of
the
left

rear

wheel

protects
the

vapor
lIqUid

separator
from

damage
Figure
23
shows
the

cover
mstalled

and

Figure
24
shows
It
removed

I
Remove
dram

plug
from
bottom
of
fuel

tank

and
dram
the
fuel
mto
sUitable

safe
contamer

2
Disconnect
wire

leadmg
to
fuel

gauge
unIt

3
Disconnect
and

remove
fuel
Inlet
tube

4
Disconnect
rubber

tubes
of
fuel
outlet
and

fuel

return
lInes
5
Disconnect
tube

leadmg
to

vapor
liqUid

separator

6
Remove

fixmg
bolts

holdmg
tank

In

place

7
Remove
fuel

tank
from
vehIcle

Inspection

Inspect
the
fuel
tank
d

connectIng
lInes
for

SIgn
of

damage
or
leaks
If
dIrt

IS
found

In
the

carbl
relor
r
fuel

pump

upon
dlsassemb

y
blo

out
the
fuel

lines

usmg
compressed
air

Repair

Fuel
tank

leaks

may
be

repaired
by
soldering

or

brazmg
the
fuel
tank

WARNING

A

fuel
tank
IS
a

potential
bomb

capable

of

klllmg
anyone

nearby
should

It
ex

plode
Always
observe
the

followmg

safety
precautions
when

repairing
the

fuel
tank

1
Remove
all
fuel
and
have
the

tank
steam

cleaned

InSIde
and
out

2
F1l1
the
tank
WIth
Inert

gas
such
as
carbon

diOXide
or

mtrogen
or
WIth
water

3
Have
a

properly
rated
fire

extIngUisher

handy
and
never
work
near
the
vehicle

After
the

repair
IS
made

pour
the
water
out

or
release
the

gas
then

put
about

a

quart
of

gasolme
In

the
tank
and
slosh
It
around
Pour

the

gasolme
out
blow
the

tank
out
WIth
com

pressed
aIr
then

replace
tank
In

vehIcle

Installation

To
mstall
the

f
iel
tank

reverse
the

p
rocedur

used

dUring
removal
After
InstallatIon
check

carefully
for
leaks

Choke

and
Accelerator

Linkages

Figure
25
IS
an

exploded
VIew
of
the

lInkages

used
on
the

accelerator
and
choke
controls
To

disassemble

replace
and
mstall
the

lInkages

refer

to
the
IllustratIon
and

proceed
as

reqUIred

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