1973 DATSUN B110 air bleeding

CHASSIS

Note
a
Before

tightening
the

gland
packing

pull
the

piston
rod

approximately
90
mm
3
543
in

upward
This
will

provide
the
shock
absorber

system
with
the
best
condition
for

bleeding

b
Gland

packing
tightening

torque
is
rated

at
8
0

to
11
0

kg
m
57
8
to
79
5
ft

Ib
However
arm

length
of
this
tool
is
extended

by
100
mm
3
94

in

as
shown
in
the

following
figure
Thus
when

actually
tightening
the

gland
packing
measure

effective

length
L
of
a

torque
wrench
to
be

used
and
set

up
torque
wrench
value
based
on

the

following
formula

C
10
x
l

I

kg
m

C
70
x
l

I
ft

lbJ

100
l
3
94

where
C
Value
read
on

the
torque
wrench

kg
m

ft
lbIJ

Effective

length
of

torque
wrench

mm
in
l

TOROUE

WRENCH

GLAND

PACKING
WRENCH
I

C

4

F

r
I

L
I

100
mm
3
94
in

6

Conduct
air

bleeding
on
the

shock
absorber

system

1
Stand
the
strut

assembly
vertically
with
the

spindle

side
down
and

pull
the

piston
rod
within
its
stroke
Turn

over
the
strut

assembly
with
the

spindle
side

up
and

depress
the

piston
rod
in

the
full

stroke

2

Repeat
the
above
described

operations
several
times

3
Make
sure
that
there
is
no

feeling
variation
on

pressure
while

depressing
or

pulling
the

piston
rod
Thus

air

bleeding
completes

J

FA
16
Fig
FA
42

ConductingaiT
bleeding
on
the
shock

absorber

system

7

Secure
the

strut
attachment
of

strut

assembly
in
a

vise
Strut
attachment

special
tool

Sn5650000

8
In
order

to
ease

operation
raise
the

piston
rod
to
the

up
most
and

secure
it
in
that

position
by
inserting
bound

bum

per

t

D

I
T

I

c
I
Piston
rod

2
Bound

bumper

3

Strut
outer
case

Fig
FA
43

Raising
piston
rod

9
Place
the

front

spring
on
the
lower

spring
seat

compress
the

spring
with
a

coil

spring
compressor
special

tool
Sn5650000
install
the
dust
cover

upper
spring

seat

oil
seal
strut

mounting
bearing
and
strut

mounting

insulator
in
that
order

CHASSIS

Ii

t

L

1

J

rJ
I

e

i
L
rubber

parts
und
alcohol

long
than
30
seconds

After
the

parts
are
cleaned

dry
them
with
com

pressed
air

Check
the

cylinder
and

piston
for

damage
and

uneven
wear
on
the

sliding
surface
and
for

other
defective

conditions

Replace
as

required

2

Replace
if
the

cylinder
and

piston
clearance
is

more

than
0
15

mm
0

006
in

3
In

principle
replace
the

piston
cup
packing
and

valves

with
new
ones
whenever

the
master

cylinder
is

disassembled
Be

sure
to

replace
if

damaged
worn

weakened

or

expanded

4
Check

the
return

springs
for
wear

damage
and
other

defective
conditions
and

replace
as

required

5

Replace
others
if

deformed

damaged
or
defective

Reassembly

Assemble
the
master

cylinder
in

reverse

sequence
of

SINGLE
MASTER
CYLINDER

s
m

e
disassembly
noting
the

following
matters

Apply
brake

fluid
to
the

component
parts
such
as

cylinder
bore

piston
etc
and

carry
out

the

operations

carefully
so
that

the

component
parts
are
not

damaged
or

no
dust
and
other

foreign
matters
enter
the

cylinder
and

brake
fluid
reselVoir

Moreover
for
rubber

parts
such
as

piston
cup
etc

apply
rubber

grease
slightly

Tightening
torque

Valve

cap

2
5

to
3
5

kg
m

I8
to
25
3

ft
Ib

Bleeder
screw

0
5

kg
m
3
6
ft
lb

Stopper
bolt

0
5
to
0
3

kg
m
l
I
to
2

2ft
lb

Reinstallation

Reinstall
the

master

cylinder
in

reverse

sequence
of

removal
After
air

bleeding
make

sure
that

no
brake
fluid

leaks
from
the
circuit
For
the

pedal
height
adjustment

refer
to
lhe

paragraph
pedal
adjustment

r
11L

y

Fig
BR
5
Cross

sectional
view

of
single
master

cylinder

BR
4

Tightening
torque

3

way
connector
1
5

to
1
8

kg
m

10
8
to
13
0
ft
lh

1
5
to
1
8

kg
m

10

8
to
13

0
ft

lh

1
5
to
1
8

kg
m

10

8
to
13

0
ft

lb

0

7
to
0
9

kg
m

5
1
to
6
5

ft
1b
Master

cylinder

Brake
hose

Air
bleeder

5

Fill
the

master

cylinder
brake

fluid
reservoir
with

brake
fluid
and

perform
air

bleeding
complele1y

Note
a
Do
not
use

brake
fluid
other
than

specified

b
The

specified
brake
fluid
is
used
for

both

single

and
tandem

type
master

cylinders

6

Upon

completion
of
air

bleeding
make

sure
that
the

brake

operates
correctly
and
check
the
brake
tube
and

hose
connectors
for
fluid

leaking
Fully
depress
the

brake

pedal
continue
to

depress
the
brake

pedal
for
several

seconds
and
make
sure
that
no
brake

fluid
leaks
from

any

part
of
the
brake
line

Replace
defective

part
if

required

Brake
line

pressure
differential

warning

light
switch

A

warning
light
is

located
on
the
instrument

panel
to

warn
the
driver
when

a

pressure
difference
of
13

to
17

kg
cm2
185
to

2421bJsq
in
exists
between
the

front
and

rear
b
rake

systems

A

hydraulically
actuated

warning
light
switch

is
located

in

the

engine
compartment
Both
front
and
rear
brake

systems
are
connected
to
this
switch
assembly

When

a

pressure
difference
of
13

to
17

kgJcm2
185
to

242

lbJsq
in
occurs
between
the
front
and
rear

brake

systems
the
valves

will
shuttle
toward
the
side
with
the

low

pressure
The
valve
contacts
with
the
switch
terminal
BRAKE

the

ground
circuit

for
the

warning
light
is

completed
and

thus
the

warning
light
lights

In
this

case
correct
the

hydraulic
brake

problem
and

bleed
the
brakes

Check
the

warning
light
switch

assembly
for
a

proper

operation
Check
the
switch

assembly
for
fluid

leakage

Note
Do

not

attempt
to

repair
switch
for

any
reason

replace
switch

assembly
completely

1
To
front
brake

L
H

2

From
master

cylinder
F

3
From
master

cylinder
R
4
To
rear
brake
L
B
R
M

5
To
front
brake
R
H

Fig
BR
12

Warning
light
switch

r

I

@

I
I
3

I
Valve

assembly

4

Piston
load

spring
Wire
terminal

Brake
tube

Fig
BR
13
Sectional

view

of

warning
light
switch

BR
7

CHASSIS

Fig
BR
19

Greasing
points
on
brake
disc

3

Tighten
the
brake
disc
installation
bolt

to
2
7
to
3
7

kg
m

19
5
to
26
7
ft
lb
4

Adjust
brake
shoe
clearance
and

perform
air

bleeding
on

the

hydraulic
system

FRONT
DISC
BRAKE

Floating
type
disc

brake
Model
ANNET

12
14A
is

used
for
some
territories
as
a

standard

Rigidity
of
the

caliper
is

high
brake

pedal
feeling
is

adequate
and
the

pad
dragging
is
minimized
The

pad
is

returned

by
elasticity
of
the

piston
seal
When
the

pad
is

worn
the

piston
operating
stroke

increases

slipping

occurs
on
the

piston
seal
surface
and
thus
clearance
is

adjusted
automatically

Moreover
in
order
to

prevent
brake

squealing
a
shim
is

inserted
behind
the

pad

2

I

Clip
6
Brake

pad
II

Cylinder
block

2

Spring
7
Air
bleeder
12
Piston
A

3
Clevis

pin
8

Retaining
ring
13
Bias

spring

4

Shim
9
Boot
14
Yoke

spring

5

Hanger

spring
10
Piston
B
15
Yoke

Fig
BR
20
Front
disc
brake

components

BR
lO

CHASSIS

2

Upon

completion
of

the

adjustment
release
the
hand

brake

lever
and
make
sure
that
the
rear

wheels
are

not

braked

Normal
stroke

78
5

mm
3

091
in
6
notches

Limited
stroke

136
0

mm
5
35
in
10
notches

The
term
Stroke
means

height
from
the

standard

position
220

mm
8
7
in

above
the
hand

brake
lever

fulcrum

Note

Readjust
hand
brake
stroke
when
it
reaches
the

limited
stroke
136
mm
5
35
inl
10
notches

Bleeding
hydraulic

system

Bleeding
the

hydraulic
brake

system
deserves

much

attention
as
it
is

an
essential

factor
for

regular
service

brake

operation

As
a
matter
of

fact

during
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

Bleeding
should
be
carried
out
at
first
with

the
masler

cylinder
then
from
the

longest
line
from
the

master

cylinder
and
then
finish

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

cylinder
with
fluid

of
the

recommended

type

2

Thoroughly
wipe
the
bleeder

screw
and
from

any

mud
or

dust

present
so
that
the

outlet
hole
is

free
from

foreign
matter

3

Attach
a

vinyl
hose

to
the
wheel

cylinder
bleeder

screw

Dip
the
end
of
the

vinyl
hose
in
a

jar
con

taining

some
brake
fluid

BR

22
I
I

I
Air
bleeder

I
2

I
Vinyl
hose

Fig
BR
54

Connecting
vinyl
hose
to
air
bleeder
rear

4

Depress
the

brake

pedal
two
to

three
times
and

keep

the

pedal
fully

depressed

5

With
the
brake

pedal
fully
depressed
loosen
the

bleeder

screw
exhaust
air

and

retighten
the

bleeder
screw

quickly

6
Return
the
brake

pedal
slowly

7

Repeat
the

operations
4

through
6

above
Air

will

no

longer
come
out

from
the
bleeder

screw
but

brake

fluid
comes
out
When
air

still
exists
in
brake
fluid
it

appears
white
due

to
air

bubble

8

Conduct
air

bleeding
on
other
wheel

cylinders
in

the

same
manner

Note

a
Check
the
reservoir
for
fluid
level

during
bleed

ing
operation

b
Fluid

withdrawn
in
the

bleeding
operation

should

not
be
used

again
for

refilling

c
When
the

master

cylinder
is
disassembled

or

replaced
conduct
air

bleeding
on
the
wheel

cyl

inder
which

is
located
most
near
the
master

cylinder

d

Ordinarily
air

bleeding
is

performed
in
the

following
sequence

Rear

left
Rear

right
Front
left

Front

right

e
Do

not
retum
the
brake

pedal
before

re

tightening
the
bleeder

screw

CLUTCH

When
the

adjusting
nut
is
returned

I
1
4
turns
the

withdrawal
lever
end
is
returned

to
1
0

to
2
0

mm
0
0394

to
0
0787
in

and
clearance
between
the

release

bearing

and

diaphragm
spring
fingers
becomes
0
7
to
I
4
mm

0

0276
to
0
0551
in

9

@

t

O
to

2
0

0
0394
to
0
0787

Unit
mm
in

I
i

I
I
I
Release

bearing

Diaphragm
spring
Lock
nu
t

Adjusting
nut

Withdrawal
lever

Fig
CL
23

Adjusting
withdrawal
lever

play

Mechanical
clutch

Adjust
the

clutch

control
cable

adjust
nut
so

that

play

at
the
withdrawal
lever

end
is
3
0

to
4
0
mm
0
1181

to

0

1575
in

and

securely
tighten
the

lock
nut
Clearance

between
the

release

bearing
and

diaphragm
spring

fingers

will
become
0
9

to
1
2

mm
0
0354
to
0

0472
in
3
0

to
4
0

0
1181
to
0

1575

@

0
9
to

1
2

I
0
0354

to
0

0472

1

j

E

1

Unit
mm
in

I
I
I
I
Diaphragm
spring

Clutch
control
cable
Withdrawal
lever

Release

bearing

Fig
CL
24

Adjusting
withdrawal
lever

play

BLEEDING
CLUTCH
SYSTEM

Hydraulic
clutch

1
Remove
the
bleed

screw
dust

cap
from
the

operating

cylinder

2

Open
the
bleed
screw

approximately
three

quarters

of
a
turn
Attach
a
tube

immersing
the

open
end
into
a

clean
container
which
contains
a
small

amount
of
brake

fluid

3
Fill

the
master

cylinder
reservoir
with
the
recom

mended
fluid

4

Depress
the

clutch

pedal
quickly
while

keeping
it

down

retighten
the
bleed

screw
and
allow
it
to

return

slowly
Repeat
this

pumping
action

until
the
fluid

entering
the
container
is

free
from
air

bubbles

5
Screw

up
the
bleed
screw

on
a
down

stroke
of
the

pedal
remove
the

bleed
tube

and

replace
the
dust

cap

CL
11