1969 DATSUN B110 air bleeding

Brakes

Adjusting
shIm
thickness
for
selectIOn

o

0197
In

00315
In

o

0630
In

Note
When

adjusting
be
sure
to
use
ad

Jusbng
sh1ms

having
same
th1ckness
for

upper
and
lower

brake
master

cylinder

IOstallahon
bolts

Upon

completIOn
of

adjusting
shIm

adjust

ment

tighten
the

stopper
down
to
such

an
ex

tent
that

heIght
of
the

pedal
head
IS

5
57

pO
0787

In
and

tighten
the
lock
nut

becurely

Free
travel
of

the
brake

pedal
IS
0
197
to

0591
tn
and
the

stroke
IS
4

72
In

Hand

Brake

Turn

the

turn
buckle

properly
and

adjust

hand

brake
lever

operatmg
stroke

correctly
so

that

operatmg
stroke
IS
3

091
m

16
notches
at

operatIng
force

of
243
to
331
Ib

Upon
com

pletIOn
of

adjustment
be
sure

to

tIghten
the

lock
nut

Upon

completIOn
of
the

adjustment
release

the
hand

brake
lever
and
make

sure
that
the

rear
wheels

are
not

braked

Normal
btroke

3091
In
6

notches

Fig
144

AdJusting
turn
buckle
LImIted
stroke

535
tn
10
notches

The
term
Stroke

means

heIght
from
the

standard

posItIon
8
7
In
above

the
hand
brake

lever
fulcrum

Note

Readjust
hand
brake

stroke
when
it

reaches

the
hmited
stroke
5

35
in

10

notches

BLEEDING

HYDRAULIC

SYSTEM

BleedIng
the

hydrauhc
brake

system
deserves

much
attentIOn

as
It

IS
an
e
senttal
factor
for

regular
servICe
brake

operatIon

As
a
matter

of
fact

durmg
the
brake

serVice

air
IS

lIkely
to

creep
Into
the
CirCUIt

WIth
the

result
that
the
flUId
actIon

IS
altered

and
the

brake

pedal
becomes

spongy
at
the

travel
end

Bleedmg
should
be
carned
out
at
first

WIth

the
master

cylmder
then
from
the

longest

lIne
from
the
master

cylmder
and
then
fimsh

up
With
the
shortest

Note

Always
clear

away
any
dirt
around

master

cylinder
reservoir

cover
before

removing
cover
for

any
reason
Never

depress
pedal
while

brake
drums

are

removed
unless
bleeder

valve
IS

open

Top
up
the

reservOIr
master

cyltnder
With

flUId
of
the

recommended

type

Fig
145

Connecting
Vinyl
hose

to
air
bleeder
rear

79

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

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