1973 DATSUN B110 brake

CHASSIS

2

Apply
brake

fluid

sufficiently
to
the

cylinder
and

piston
and

assemble
them

Reinstallation

Reinstall
the
master

cylinder
assembly
in
reverse

sequence
of

removal
and

adjust
as
follows

I

Adjust
the

pedal
height
by
changing
the

push
rod

length

2
B

eed
air

out
of
the

hydraulic
system

OPERATING

CYLINDER

Hydraulic
clutch

Removal

Remove

the
return

spring

2

Disconnect
the
clutch
line

from
the

operating
cyl

inder

3

Disconnect
the

push
rod

from
the

withdrawal
lever

4

Release
two
bolts
used

to
mount

the

operating

cylinder
to
the
clutch

housing

Disassembly

1
Remove
the

dust

cover

2
Remove
the

snap
ring
and
all
other

parts
can
be

disassembled

@

Fig
CL
22

Operating

cylinder
disassembled

CL
10
Inspection

Check
all

parts
especially
the

piston

cup
and

replace

if
worn
or

damaged

Reassembly

Reassemble

the

operating
cylinder
in

reverse

sequence

of

disassembly

noting
the

following
matters

Soak
the

piston
cup
in
fluid
before

reassembly

Install
the

piston

cup
carefully
so
that
it
is
faced

correctly

2

Apply
brake

fluid

sufficiently
to
the

cylinder
and

piston
and

assemble
them

Reinstallation

Reinstal
the

operating
cylinder
in

reverse

sequence
of

removal

1

Bleed
air
out
of

the

hydraulic
system

2

Adjust
the

push
rod
so
that
the

withdrawal
lever
end

play
is
0
to
2
0

mm
0

0394

to
0
0787
in

in

accordance

with
the

following
instructions

AD
USTING
WITHDRAWAL
LEVER

Correct

adjustment
of

the
clutch
withdrawal
lever
is

essential

Insufficient
free
travel
between
the
release

bearing
and
the

diaphragm

spring
fingers
causes
the
clutch

to

slip
while
excessive

free
travel
affects
full

disengage

ment
of
the
clutch

The
clearance
between
the
release

bearing
and
the

diaphragm
spring

fingers
can
be

adjusted
at

the
with

drawallever
end

as
follows

Hydraulic
clutch

Loosen

the
lock

nut
tighten
the

adjusting
nut
and

eliminate

clearance
between
the

top
of

the
withdrawal

lever
and
release

bearing

2
Return
the

adjusting
nut
from

that

position
I
4

turns
and

set
the

adjusting
nut
stationarily
with
the
lock

nut

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

The
clutch

drags
CHASSIS

Weakened
broken

ur
unhooked
clutch
with

drawallever
return

spring

Distorted
or
worn
drive

shaft

Excessive

play
of
release

bearing
on

slip

sleeve

Insufficient

push
rod

length

Excessive

pedal
free
travel

Warped
clutch
disc

Roughened
linings

Improperly
fitted
loose
or

broken

lining

Incorrect
release

bearing
to
diaphragm

spring

fmger
clearance

Clutch
disc
hub

forcing
on
drive
shaft

Damaged
drive

shaft

splines
prevent
the

clutch
disc

from

sliding

Oil
or

grease
on

linings

Warped
or

damaged
pressure
plate
or

clutch

cover

Air

pockets
in
the

hydraulic
system
not

bled

correctly

Dirt
or

foreign
matter
on

sealing
faces
of

master

cylinder
piston
cup

Air

pockets
in
master

cylinder
due
to
loose

piston

Fluid

leakage
from
cylinder

Low
fluid
level
in
reservoir

CL14
Replace
the

spring
or
hook

it

up
as

required

Replace
the
drive
shaft

and
clutch
disc
if

necessary

Replace
the
worn

parts

Adjust
the

push
rod

length
correctly

Adjust
free
travel
correctly

Set
level
of
clutch
disc
if

possible

Maximum

plate
run
out
0
25

mm
0

0098

in

Repolish
linings
with

a
metal
brush
or

replace
them
if

necessary

Replace
linings
Lining
rivets

should
be

clenched
with

no

protrusion
to
avoid

damaging

pressure
plate
and

flywheel

Adjust
correctly

Locate

cause
of
trouble
and

remove
it
if

possible
Otherwise

replace
the
clutch
disc

Replace
the
drive

shaft
also
the
clutch
disc

if

required

Locate
the
cause
of
oil
or

grease
leakage
and

correct
it
as

required

Clean
or

replace
linings

Replace
defective

parts

Bleed
out

completely

Clean

replace
piston
cup
if

damaged
and

bleed
the

system

Replace
piston
cup
and
bleed
the

system

Replace
piston
cup
if

damaged
bleed
the

system

Top
up
with
brake

fluid
and
bleed
the

system
if

necessary