DATSUN 510 1968 Service Manual Online
Page 81 of 252
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
Page 82 of 252
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
Page 83 of 252
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
Page 84 of 252
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
Page 85 of 252
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
Page 86 of 252
fUEL
SYSTEM
@
@
To
Cl
8nkcaS8
J
t
of
I
4
l
t
rr
E
81
Page 87 of 252
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
Page 88 of 252
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
Page 89 of 252
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
Page 90 of 252
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