1969 DATSUN B110 Service Repair Manual

Fuel

SJstem

Check
float
needle
and
seat
for

wear

Replace

the

assembly
If

worn

Check
the
throttle
and
choke
bores
In
throttle

body
and

cover

castIng
for
wear
or
out

of
round

Inspect
Idle

adjustIng
needles
for
burrs

or

ndges
Replace
as

reqUIred

Inspect
gaskets
to

ensure
that

they
do
not

ap

pear
hard

or
bnttle
and
that
the

edges
are
not

turned

or
dIstorted
If

any
such
condItIOn
IS

detected

they
must
be

replaced

Check
filter
secreen
screen
for

cloggIng
Clean

and
If
It
IS
dIstorted
or
remaInS

plugged

replace

Check
cluster
for
loose

or
worn

parts
If

damage
or
Ioosene
s
eXists

replace
cluster

assembly

Check
the

hnkage
for

operatIng
condItion

Inspect
the

operatIOn
of

acceleratIng
pump

Pour

gasohne
Into
the
float
chamber
and

operate
the
throttle
hver
Check
conditIOn
of

gasohne
InjectIOn
from
the

acceleratIng
nozzle

Assembly
and
Installation

Assemble
and
Install
the
carburetor
In

I

everse

sequence
of

dIsassembly
and
removal
Replace
the

gaskets
If

necessary

When

dlsassembhng
and

reassembhng
the
In

terlock
hnk
and
related

components
be

careful
not
to

bend
or
deform
the

components

Reassembly
carefully
and

correctly
so
that
all

Interlock
hnks

operate
smoothly

Jets

The
carburetor

performance
depends
on

Jets

and

aIr
bleed
and
the
vehicle
emISSIOns

largely
depends
on
the
carburetor

performan

ce
That

IS

why
these

components
are

manufactured
WIth
utmost
care

To
clean
them
use

gasohne
and
blow
aIr
on

them

ChangIng
Jet
or
air

bleed
sIze

may

cause
III
vehICle
emIssIon
So

they
should
not

be

changed
theIr
numbers

Trouble

Shootmg

In
the

follOWIng
table
the

symptom
and

causes
of
carburetor
troubles
and
remedIes
for

them

are
hsted
to
faclhtate

qUIck
repaIrs

There

are
vanous
causes
of

engIne
trouble
It

sometImes

happens
that
the

completely
effec

tlve
carburetor
seems

apparently
to
have

some
troubles
when
electnc

systern
IS
defec

tIve
Therefore
whenever
the

engIne
has

troubles
electnc

system
must
be
checked
first

before

adjusting
the
carburetor

TROUBLE
SHOOTING

Troubles
POSSible
causes

Remedlc

Overflow
Dirt

accumulated
on
needle
valve
Clean
needle
valve

Fuel

pump
pressure
100

hIgh
RCpJlf

pump

Needle

valve
seat

Improper

Lap
or

replai
e

ExceSSIve
fuel

Fuel
overflows
See
above

I
l

onsumptlon

Each

mam
aIr
bleed

clogged
Clean

80

ruel

Sptem

Troubles

Power

shortage

Improper
IdlIng

Rough
engIne
Idle

or

eogme
stop

Engme
Idle
too
fast
Possible
causes

Gauge
plate
adjustment
mcorrect

Choke
valve
does
not

open

Outlet
valve
seat

of
accelerator

pump
1m

proper

Lmked

openmg
of

secondary
throttle
valve

too

early

each
mam

Jet
clogged

EaLh
throttle
valve
does
not

fully
open

Fuel

pump
operated
Improperly

uel
stramer

clogged

Vacuum

Jet
clogged

Power
vdlve

operated
Improperly

Slow

Jel
dugged

Fat
h
thronle
valve
does
not
close

Secondary
throttle
valve

operated
Im

properly

Eal
h
throttle
valve
shaft
wear

Packing
between
mamfold
and
carburetor

defective

Fuel
overflows

Incorrect
carburetor

adjustment
Idle

speed

Idle
miXture
choke

settmg

Incorrect
baSIC

1
OIt100

tunmg

Incorrect

automatic
temperature
control
air

cleaner

Defect
or
malfunction

of

Igmtlon
system

spark
plug
lugh
tenSion

cable
breaker

JX
Int

Ignition
COIl
etc

Trouble
In
throttle
lInk
and
cable

Incorred
throttle

opener
adjustment

Trouble
In

PCV
valve

Trouble
In
automatic

choke

Defect
or

malfunctIOn
of

Igmhon
s
stem

spark
plug
hIgh
tenSion
cable
breaker

pomt
Ignition
Call
elc
Remedies

Correct

adjustment

Adjust

Lap
or

replace

Adlust

Clean

Adjust

Repair

Clean

Clean

Adlust

Clean

Adlusl

Overhaul
and
dedn

Replace

ReplaLe
tlghtenlllg

See
the
fust
Item

Adjust
Idle

speed
mixture
dnd

tUllIng

Adjust
19mtlon
timing

Adjust
automatlL

temperature
control
air

cleaner

Adjust
or

replaLe
IgllltIun
system

Chel
k
throttle
hnk
and
Lable

Adjust
throttle

opener

Replace
PCV
vJlve

Adjust
auotmJtIL
l
hoke

Adjust
or

replac
e

IgllltIun
system

J

81

Fuel
I
em

Troubles

Engine
hesitatIOn

Car
knock
when

coastIng

EnglOe
does
not

start

82
POSSIble
causes

Eal
h
mam

Jet
slow

Jet
clogged

By

pdss
hole
die

pdssage
dogged

Emulsion
lube

dogged

Idhng
adlostment
mcorrect

Secondary
throttle
valve

operated
1m

properly

Incorrect
throttle

opener
adjustment

Trouble
m
PCV

valve

Defect
or

malfunction
of

Igmtlon
system

spark
plog
ugh
tenSIon
cable
breaker

pomt
IgmtIon
cod

etc

Fuel
overflows

No
fuel

IdlIng
adjustment
mearrect

Fast
Idle

adjustment
mcareeet

Damaged
antl
dlesehng
solenoId

BI
metal
rod
m

contact
WIth
bl
metal
case
RemedIes

Clean

Cledn

lube

lean

Correct

adjustment

Overhaul
and
clean

AdjUstlhroltle
opener

Replace
PCV
valve

Adjust
or

replace
IgJuhan
system

See
the
first
Item

Check

pump
fuel

pIpe
and
needle
valve

Correct

adjustment

Correct

adjustment

Replace

Adlust

Cooling

Sptem

Fig
106
Coolmg
system

C0026

FIg
107
Water

pump
and
front
cover

FIg
1I1S
Water

pump
removal

DESCRIPTION
radiator
w1th

hIgh
coohng
efficiency
and
of

a

pellet
type
thermostat

The

coohng
system
IS
of

a
closed

pressure
type

With

hIgh
coolmg
capablhty
Coohng
water
WATER
PUMP

flowmg
through
resIstance
free
water

passages
m
the

cyhnder
head
and

cyhnder
The
water

pump
IS
a

centrifugal
type
water

block
IS
mamtamed
at

adequate
temperature

pum
WIth
an

alumlpum
d1e
cast

pump
body

range
at

allo
tlmes

by
means
of

an

ample
T
he

olute
chamber
IS
bUIlt
mto
the
front

capacIty
water

pump
of

a

corrugated
fin

type
cover

assembly
and
a

high
pressure

seahng

84

GooliDI
Sptem

mechamsm

IS

adopted
to

prevent
the
water

leakage
and
nOIse

completely

Note
The
water

pump
must
not
be

disassembled
since
the

bearings
are

shrmkage
fitted
to
their
bores
If

any
part

of
water

pump
is
found
defective

replace

pump
assembly

Removal

Dram

coolmg
water

completely

Take
the
fan
belt
ofT
the

pulley

Remove
fan
and

pulley

Remove
the
water

pump

Installation

InstallatIOn

IS
the
reverse
of
removal

THERMOSTAT

A

pellet
type
thermostat
IS
used
m
the
water

outlet

passage
to
control
the
flow
of
coolant

provldmg
fast

engme
warm

up
and

regulatmg

coolant

temperature
A
wax

pellet
m
the
ther

mo
tat

expands
when
heated
and
contracts

when
cooled
The

pellet
IS
connected

through

a

piston
to
a

valve
and
when
the

pellet
IS

heated

pressure
IS
exerted

agamst
a
rubber

dIaphragm
and
the
valve

opens
As
the

pellet

IS
cooled
the
contractIOn
allows
the

sprmg
to

close
the
valve

Removal

Dram

coohng
water

Remove
radiator
hose

Remove
water
outlet
elbow
Then
take
out

the
thermostat

Inspection

To
test
the
thermostat
for

proper
operatmg

temperature
submerg
he
umt
m

a
contamer

of
water
Heat
the
water
and
observe
the
tem

perature

Measure

temperature
when
the
thermostat

valve

Just
starts

rlsmg

If
thermostat
does
not

operate
at
the
above

specIfied
temperatures
It
must

be

replaced
Installation

When

mstalhng
the
thermostat

apply

adheSIve
Three
Bond
to
both
SIdes
of
the

packmg
for

preventIOn
of
water

leakage
In

stall
the
thermostat
m

reverse

sequence
of

removal

USA
Canadd
Olher

coun
t
nes

Valve

opemng

temperature
177
to

r8710
16710

F
183
193
173

Valve
lIft

O
oF
031
203
031
212
031
194

WI

fL
g
0

I
l

1

L
JI
I
I

I

I

a

J
i

o
wa
r
outlet

EI
Thermostat

Fig
109
Thermostat
removal

FIQ
110
Thermostat

inspection

81

Gooliol
SJstem

RADIATOR

The
radiator

IS
of

a
down
flow

type
w1th

an
ex

panslOn
tank
located

on
the

top
of
tube

sec

tlOn

Pressure

IS

applted
to
the

system
and
the

I
eltef
valve

Incorporated
In
the
radiator
filler

cap
controls
the

pressure
at

approximately
13

Ib

sq
In

Removal

DraIn

cooltng
water

DIsconnect
radiator

upper
hose
lower
hose

and
hose
to

the
reservOir
tank

Detach
the
radiator

assembly
by
removmg
SIX

fiXIng
bolts

Inspection

Check
for
water

leakage
and
cracks

USIng
a

cap
tester
If
such
defects

are
detected

repair

88
Fig
111
Radiator
removal

or

replace
the
radIator

assembly

Installation

InstallatIOn
IS
the
reverse
of
removal

Brakes

Jl

r7
I

J

I

lip
b
Ih
ih

p
lIJ
11

yhndu
blolk

2

Spnn
7
Air

hlu
k
r
12
PI
lon

3
LVI

pm
H
Rl
t

llmll
nn
13

lh
L

prm

hlm

8001
I
YOkl

pnn

5
lIJ
n

ll

prill
111
1
lon
Ii

15
Yoh

Fig
112
Front
diSC
brake

components

Movement
exceeding
the

elastic
dISplacement
IS

released
with

slipping
on

the
seal
surf
a
Returns
elastIC

displacement
of

the

seal
CYLINDER
SIDE

DECOMPRESSION

Fig
113
PIston
seal
automatic

adjusting
operation

FRONT
DISC

BRAKE
I
Brake

pad

2

Retalnl
pin

I
Clip

FIg
114

RemOVing
retaining

pm

Rigidity
of
the

cahper
IS

high
brake

pedal

feehng
IS

adequate
and
the

pad
draggIng
IS

piston

operating
stroke

Increases

shpplng
oc

mlmmlzed
The

padqs
returned

by
elastIcity
curs
on
the

plston
seal
surface
and
thus

of
the

piston
seal
When
the

pad
IS
worn
the
clearance
IS

adjusted

automatIcally

88

r
Brakes

Moreover
In
order
to

prevent
brake

squeahng
a
shIm

IS
Inserted
behind
the

pad

BRAKE
PAD

Replacement

Jack

up
front
UnIt
of
the
vehicle
and
remove

the
front
wheel

Remove

clip
from
the

retaining
pin
and

sup

porting
the
brake

pad
remove
the

retaining

pin
and
COil

spring

Unhook
the

hanger
spring
and
Withdraw
the

brake

pad
and
shim
With
a

pair
of

phers

Note
When
the
brake

pad
IS
removed
do

not

depress
the
brake

pedal
or
otherWise

the

piston
will
come
out

Inspection

Clearance
between
the
brake

pad
and
rotor
IS

adjusted
automatically
Check
the
brake

pad

Fig
115

WIthdraWing
brake

pad
and
shIm
for

wear
after
the
first
6
000
miles

driVing

and

every
3
000
miles
thereafter

Clean
the
brake

pad
With
carbon

tetrachloride

or

gasohne

When
011
and
or

grease
IS

heavIly
stlcked
on

the

pad
or
when
deteriorated
or
deformed
due

to

overheating
replace
the

pad
With
a
new

one

When
thickness
of
the
friction
material

pad

IS
less
than
0
0630
In

replace
Replace
when

total

pad
thIckness
IS
less
than

0
2402
In

Note

Replace
pads
as
a
set

Replacement

at

only
one

position
may
cause
uneven

brake
effect
It

IS
recommended
that

rotation
of

pads
be
made

periodically

Check
the
rotor

Reinstallation

Clean
the

calipers
and

piston
pad
installing

parts

Note
Do
not

use
mineral
oil
Be
careful

not
to

apply
oil

on
the
rotor

Depress
the

pIston
Into
the

cyhnder
so
that

new

pad
can
be
Installed

Note
a
Note
that
brake
fluid

may
over

flow
from
the
reservoir
It
is
recommen

ded
that

operation
be
carried
out

by

loosening
the
breather
to
release
brake

fluid

b
The

piston
can
be

easily
pushed
in

by

hand
But
if

pushed
excessively
the

Fig
116

DepreSSion
piston
A
and
B
Into

cylinder

88