1969 DATSUN B110 air condition

Icnition
Sptem

Ovcrhc
Jtmg

Norm
Jl
i
r

rJ
I

ttr
I
i

V

Carbon
fould

Fig
85

Spark
plug
Life

plug
heat

range

Carbon
fouled

Dry
fluffy
carbon

depo
lts
on

the

Insulator
and
electrode

were

mostly

caused

by
slow

speed
dnvlng
In

cIty
weak

Ig

nltlOn
too
nch
fuel

mixture

dirty
aIr
cleaner

etc

It
IS
advIsable
to

replace
WIth

plugs
havmg

hotter

heat

range

011

fouled
Wet
black

depoSits
show

excesSive

oIl
entrance

Into
combusllon

chamber

through

worn

rmgs
and

pIstons
or
excessIve
clearance

between
valve

gUIdes
and

stems
If
the

same

condition

remams
after

repair
use
a
hotter

plug

Overheatmg
WhIte

or

hght
gray
msulator

WIth

black
or

gray
brown

spots
and

blUIsh

burnt
electrodes
indIcate

engme
overheatIng

Moreover
th
e

appearance
results
from
in

correct

IgnitIon

tIming
loose

spark
plugs
low

guel
pump
pressure
wrong
selectIOn

of
fuel
a

hotter

plug
etc

It
IS
adVisable
to

replace
WIth

plugs

havmg

colder

heat

range

After

cleaning
dress

electrodes
With

a
small

fine
file
to
flatten

the
surfaces
of
both

center

and
Side

electrodes
In

parallel
Set

spark
plug

gap
to

specification
FIg
86

Settmg
spark

plug
gap

Install

spark
plugs
and

torque
each

plug
to
11

to
15
ft
Ib

Connect

spark
plug
wires

Cleaning
and

Regap

Clean

spark
plugs
In

a
sand

blast

type

cleaner
A
VOId

excessIve

blasting
Clean
and

remove
carbon

or
OXide

depoSits
but
do
not

wear

away
porcelain
If

depos1ts
are
too

stub

born
discard

plugs

After

cleaning
spark
plugs
renew

firing
sur

face
of
electrodes
With
file

mentioned
above

Then

gap
spark
plugs
to
0
030
to
0
035
In

uSing
a
round

wire
feeler

gauge
All

spark

plugs
new
or
used
should

have
the

gap

checked
and
reset

by
bending

ground

electrode

II

Fuel

Sptem

Testing

A
fuel

pump
IS

operatIng
properly
when

1tS

pressure
IS
Within

specifications
and
ItS

capacIty
IS

equal
to

the

engine
s

reqUIrements

at
all

speeds

Pressure
and

capacity
must

be
determined

by

two
tests
With
the

pump
mounted
on
the

engIne
Be

sure
that

there
IS

gasohne
m

the

tank

when

conductIng
these

tests

Fig
89
Pull

rod
removal
StatIc

Pressure
Test

The
static

pressure
test
IS
conducted

as

follows

Disconnect
the
carburetor

fuel
line
at
the

car

buretor

Install
the

necessary

adapter
and
tee

fitting

to
the
fuel
Ime
and
attach

a
SUitable

pressure

gauge

Start

and
run

engme
at

varymg
speeds

The

readIng
on
the

gauge
IS

the
static

fuel

pressure
and

thIS

should
remam
wlthm

the

follOWing
Itmlts

2
61b

sq
m

Pressure

below
the
lower
hmlt

IndlCates
ex

treme

wear
on

one

part
of
a
small
amount

of

wear
on
each

working

part

They
also
md1cate
a

ruptured
dIaphragm

worn

warped
dirty
or

gummmg
valves
and

seats

or
weak

dIaphragm
return

spring

Pressure
above

the

upper
hmlt

Indicates
an

excessIVely
strong
dIaphragm
that

IS
too

tight

ThIS

condItIOn

reqUIres
removal
of
the

fuel

pump

assembly
for

replacement
or

repair

I

V
lvc
llllh

2

PdlklOg

3
Retamer

4

Stre

5

p

6

Ga
ket

7
Screw

8
Washer

prln

9
Rocker
Jrm

10
Rocker

pm

II

Ro
ker
fm

pTln

12

Spdcer

13

Diaphragm
assembly

14

15
Retiuner

16

Diaphragm
sprtng

17
Washer

5PIlllg

18
Nul

19
Washer

plalO

20
Ga
ket

21

Spacer

22

Complete
body
lower

23
Connector
anlet

24
Connector
outlet

Fig
90
Structure

of
fuel

pump

51

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

Brakes

Thoroughly
Wipe
the
bleeder

screw
and
from

any
mud

or
dust

present
so
that
the
outlet

hole

IS
free
from

foreign
matter

Attach
a

VInyl
hose
to
the
wheel

cyhnder

bleeder

screw

Dip
the
end
of
the

VInyl
hose
In

a

Jar
contaInIng
some
brake
flUId

Depress
the
brake

pedal
two
to
three
times

and

keep
the

pedal
fully
depressed

With
the
brake

pedal
fully
depressed
loosen

the
bleeder
screw
exhaust

air
and

rettghten

the
bleeder
screw

qUIckly

Return
the
brake

pedal
slowly

Repeat
the

operatIons
above

Air
WIll
no

longer
come
out
from
the
bleeder

screw
but

brake
flUId

comes
out
When
atr

stIll
eXists
In

brake
flUId
It

appears
whIte
due
to

aIr
bub

ble
Conduct
aIr

bleedIng
on
other
wheel

cyhnders

In
the

same
manner

Note
a
Check
the
reservoir
for
fluid
level

during
bleeding
operation

b
FlUid
withdrawn
in
the

operation
should
not
be
used

refilling
bleeding

again
for

c
When
the
master

cylinder
is
dIsassem

bled

or

replaced
conduct
air

bleeding
on

the
wheel

cylinder
which
is
located
most

near
the
master

cyhnder

d

Ordinarily
air

bleeding
is

performed
in

the

following
sequence

Rear
left
Rear

right
Front
left
Front

right

e
Do
not
return

the
brake

pedal
before

retightening
the
bleeder
screw

TROUBLE
SHOOTING

Condition
Probable
cause

Corretttve
dellon

Spongy
pedal
Au
In
brake
lines
Bleed

Ihoroughly

Swollen
hose
due
to
detenoratlOn
or
use
of

Replace
ho
e
md
bleed
the

system

poor
qualIty
brake
flUid

Use
of
a

brake
flu
d
wIth

a

bOilIng
pomt

Change
wIth
the

spectlied
brake

flUId
dnd

which
15
too

low
bleed

system

ReservOir

filler

cap
vent
hole

clogged
Tins
Clean

reserVOIr
filler

cap
and
bleed
the

promotes
a
Vdcuum
In
master

cylinder
that

system

suckS
In
air

through
rear
seal

Pedal

Yields
under
Detenorated
check
valve
Fit
a
new

check
valve
and
bleed
the

system

shght
pressure

ExterIlalleaks
Check
master

cyhnder
plpmg
and
wheel

cylInder
for
leaks

and
make

necessary
re

pairs

Master

cyhnder
leaks

through

pnmary
cap
Overhaul
master

cyhnder

80

Clutch

DESCRIPTION

The
clutch
IS
a

sIngle
dry
dIsc

diaphragm

prIng

type
clutch
The

major
components
are

clutch

cover

pressure
plate
diaphragm

sprIng
and

wire

rIngs
The
clutch
diSC
IS

provided
WIth
rIveted

plates
on
both
surfaces

and
cot

bprIngs
arranged
In

a
hnk
The
COIl

prIngs
absOl
b
shock
whIle

engagIng
the

clutch

softemng
and

smoothIng
clutch

engagement

Release

bearIng
sleeve
and
WIthdrawal
lever

dre
used
to
control
clutch

engagement
and

disengagement

Each

part
of
the
clutch

assembly
IS
secured

With
rivets
Therefore
when
a
trouble

IS
un

correctable

replace
the
clutch

assembly
With

a

new

assembly

30

1181

r
I

I

I
I

I

8

1

il
f
0

g
it

l

00

r
O
11

I

N

NN

0
to
lt

lt

ll
l
If
N

O

N

I

I
I

I

FIg
154
Construction
of
clutch

100
CLUTCH
PEDAL

Removal

Remove
the
return

sprmg

Loosen
the
lock
nut
of
the
master

cyhnder

push
rod
and
disconnect
the

push
rod
end

Remove
the
lock
nut
and
washer
of
the

pedal

shaft
and
remove
the

pedal
lever

Inspection

Thoroughly
clean
all

disassembled
parts
m

dlcated
below
and

carefully
check
them
for

wear

damage
and
other
abnormal
conditions

RepaIr
or

replace
them
With
new
ones
If

reqUIred

Pedal
head
rubber

Return

sprIng

9353

3682
00004

lIGHTENING
TORQUE
1

5
to
2
2

kg
m

108
to

159ft
lbl

UOIt
mm

Inl

Clutch

Pedal
lever
bush

Fulcrum

pedal
pIn
etc

Remstallation

Reinstall
the
clutch

pedal
In

reverse

sequence

of
removal

Adjustment

Adjust
pedal
pad
heIght
to

565
In
Without

stopper
The

adjustment
IS
made

by
selectmg

and

applYIng
shlm
s

haVing
adequate

thIckness

Be
Ule
to

use
shIms

haVIng
same
thIckness

for
both

upper
and
lower

Next

adjust
the

pedal
stopper
properly
so
that

the

pedal
pad
height
IS
557
In
and

secure
the

pOSitIOn
WIth
lock
nut

Note
Make

sure
that
chaSSIS

grease
has

been

applied
to
the
CG
marked

portions

two

places
Grease
if

reqUired

CLUTCH
MASTER
CYLINDER

Removal

DIsconnect
the

push
rod
from
the
cleVIS

DIsconnect
the
clutch
lIne
from

the
master

cylinder
and
draIn
flUid

Remove
the

ecunng
bolts
and
remove
the

master

cyhnder
assembly
from
the
vehIcle

DIsassembly

Remove
the
filler

cap
and
draIn
flUId

Pull
back
the
dust
cover

and
remove
the

snap

rIng
The

stopper
push
rod

pIston
assembly

pnmary
cup
and
return

sptlng
assembly
can

be
removed

Inspection

Thoroughly
clean
all

parts
With
brake
flUId

before

InspectIOn

Check
the

cyhnder
and

piston
for
uneven

wear

or

damage
Replace
If

required

When
clearance
between
the

cylinder
and

pIston
IS
more
than
O
0059
In

replace
the

cyhnder

102
Replace
the

pIston
cup
pnmanly
whenever

the
master

cyhnder
IS
dIsassembled
It
must

also
be

replaced
when

wear
or
deformatIOn

due
to

fatIgue
or

damage
IS
found

Check
the
dust

cover
OIl
reservOIr
filler

cap

and
clutch
lIne
for

damage
or
deformatIOn
If

abnormal
condItIOn
IS
found

replace
With
new

one

Reassembly

Reassemble
the
master

cylInder
assembly
In

reverse
sequence
of

dIsassembly
notIng
the

follOWIng
matters

The

pIston
cup
should
be
soaked
In
brake
flUId

before

reassembly
Install
the

pIston
cup

carefully
so
that
It
IS

correctly
faced

Apply
brake
flUId

suffiCIently
to
the

cyhnder

and

pIston
and
assemble
them

Reinstallation

ReInstall
the
master

cyhnder
assembly
In

reverse

sequence
of
removal
and

adjust
as

follows

Adjust
the

pedal
heIght
by
changmg
the

push

rod

length

Bleed
air
out
of
the

hydrauhc
system

BLEEDING
CLUTCH
SYSTEM

Remove
the
bleed
screw
dust

cap
from
the

operatIng
cyhnder

Open
the
bleed
screw

approximately

three

quarters
of
a
turn
Attach

a
tube

Immer

SIng
the

open
end
mto

a
clean
contaIner
which

contaInS
a
small
amount
of
brake
flUId

Fill
the
master

cyhnder
reservOIr
With
the

recommended
flUId

Depress
the
clutch

pedal
qUIckly
while

keepIng
It
down

retighten
the
bleed

screw

and
allow
It
to
return

slowly
Repeat
thiS

pumpIng
actIOn
unttl
the
flUId

entenng
the

contaIner

IS
free
from
air
bubbles

Screw

up
the
bleed
screw
on
a
down
stroke
of

the

pedal
remove
the

bleec
t1
1
nd

rel1lace

the
dust

cap

llead
anW
M
ethOd
of

Inspection

Probable
cause
Check
the
fuse
block
and
wlute

cable
for
contact

CondItiOn
Blown
off
fuse
or
faulty
contact
Check
the
fuse
for
fusIng
and

faulty
contact

An
lamps
do

not
hght
Faulty
hghtlng
sWItch
termInal

connector
Check
the
connector
for
contact

Conduct
continUIty
test

Defective
hghtlng
sWItch
Check
the
fuse
for
fusIng
and

faulty
contact

1h
1M
BI
m
off
CO

does
not
hght

for
both
high

and
loW
beams
Check
the
connector
for
contact

lmproper
dImmer
sWitch
contact

DefectIve
dImmer
sWitch
Conduct
contlnu
ty
test
Correctwe
ac
tlon

RepaIr
as
requtred

When
fused
detect

and
repaH
the
cause

and
replace
the
fuse

RepaIr
as
requHed

If
the
lighting
SWitch

IS
defectWe
replace

When
fused
detect

and
repair
the
cause

and
replace
the
fuse

RepaIr
as
requned
I
f

If
the
dImmer
sWitch

S
defectWe
replace

a
f
1

I
I
Thermometer
and
fuel
meter

condition
Probable
cause

Both
thermometer
Blov
U
off
fuse
or
Improper
con

and
fuel
meter
do
nectlOn

not
operate

r
II
1
Both
thermometer

and
fuel
meter

mdlcate
Inaccu

rately
Defec
IVe
voltage
regulator
Dam

aged
fused
or
open
contact

DefectIVe
voltage
regulator
Bro

ken
heat
Wire
seized
contact
and

or
Improper
grounding

lmproper
cable
contact
MethOd
of

lnspectlon

Check
the
fuse
for
fUSing
and

Improper
contact

Meter
operates
excessIVelY

Meter
operates
shghtly

o

a
t

Correctl
le

actlon

Replace
after
cor

rectiUg
the
cause
If

fused
Correct
con

tact
The
voltage
regulator

IS
combmed
With
the

thermometer
to
a

smgle
unit
When
the

voltage
regulator
IS

defectlve
replace
It

together
With
the

thermometer
Replace
together

With
thermometer

Check
the
cable
be

twee
l
fuse
and
meter

for
unproper
contact

and
repair
If
requlted