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Clutch
DESCRIPTION
Either
a
diaphragm type
or
coil spring type clutch
st
fitted In
the
case
of the
diaphragm
type clutch the clutch
cover
and the
pressure
plate
are
combined
by
nine
spring setting bolts The
diaphragm
has
nine
release
fingers
which
apply
pressure
to
the
pressure
plate
to
hold the latter
In
constant contact
With the
clutch driven
plate
and
thereby
With the
flywheel
The Call sprlng
ty
pe clutch
consists
of the clutch
cover
and the
pressure
plate
combined
by
nine
pressure springs Three release
levers retained
by
eye bolts and
nuts
serve
to
release the clutch
mechanism
CLUTCH
Removal
Remove
the
gearbox
as
deSCribed
In
section
GEARBOX
When
a
diaphragm
clutch
IS
fitted
Insert
speCial
tool
ST49090000 clutch
aligning
tool
or a
spare clutch shaft
Into
the
splines
of the driven
plate
In
order
to
support the clutch
Remove the
SIX
clutch
cover
bolts
by loosening
gradually
In a
diagonal
manner
and 11ft off the clutch
cover
I
n
the
case
of the COIl spring type
Insert
SUitable hooks under
the
release levers
to
restrain
the clutch spring
tension
and
remove
the
clutch
cover
bolts
as
descrobed
above
for the
diaphragm
type clutch
CLUTCH
Dismantling
Diaphragm
clutch
The
only dismantling
recommended
IS
the
replacement
of the clutch
cover
If the clutch
IS
damaged
to
a
further
extent
replace
the
complete assembly
Cod spring clutch
A clutch
assembly
tool Similar
as
Illustrated
In
Fig
F 3 should be used
to
dismantle the clutch The parts
Illustrated
are
1
Base
plate
2
Centre SpigOt
3
Distance
pieces
4
Height
gauge 5
Operating
lever
6
Securong
bolts
The
speCial
Datsun Tool has the number ST47990000
Included
With thiS tool
IS a
chart
giVing the parts
to
be used for
every
particular
type of clutch
In order
to
dismantle the clutch
place
the distance spacers
on
the base
plate
and arrange the clutch
cover so on
the base
plate
that the
cover
holes COinCide With the threaded holes
In
the base
plate
Bolt down the
cover
to
the
plate
Mark clutch
cover
the pressure
plate
lugs
and the release levers
Remove the restraining hooks
previously
pushed
under the ends
of the clutch release levers and
unscrew
the three
nuts
from the
eyebolts Slowly
release the pressure
on
the clutch COil springs
by
unscrewing the
cover
bolts
gradually
In a
diagonal
pattern
Lift off the clutch
cover
spring caps springs spring
seats
and
the pressure
plate
CLUTCH INSPECTION
Clean all
parts
With the exception of the clutch release
bearing
and the clutch driven
plate
and
che
k the indiVidual parts
as
follows
Chttch dnven
plate
Check the clutch driven
plate
for
run
out
between the
centres
of
a
lathe and
replace
or
straighten
the
plate
If the indicated
value exceeds 05
mm
002
In
Fig
F 8
at
a
distance of 95
mm
3 74
In
from the
centre
of the
plate
If the
rivet
heads
are
less then 03
mm
0012
In
below the clutch
faCings
or
there
IS
abnormal
wear or
rivets
m
sslng
replace
the driven
plate
or
the
clutch
factogs
Check the
splines
In
the clutch driven
plate
hub for rotational
backlash
by plaCing
the
plate
on
the
gearbox
clutch shaft and
rocking
It to
and fro
If
It
IS
felt that the clearance exceeds 0 4
mm
0016
to
replace
the
complete plate
It
IS
also
pOSSible
to
replace
the hub
only
but
thiS
IS a
Job
for the
more
skilled
person
and
should
only
be carned
out
If
the
necessary
eqUIpment
IS
available
If the clutch
factogs
are
SOiled With 011
or
grease clean off With
a
SUitable solvent and dress up With
a wore
brush If
pOSSible
If
the
OIling
up
IS exceSSive
the clutch
factogs
or
the
complete
plate
must
be renewed
Pressure
plate
Check
the
pressure
plate
for
damage
such
as
dents and
scratches and
lall
smooth If
necessary
Remove the
mtolmum
of metal necessary
to restore
the surface
UStog
a
surface
plate
check that the pressure
plate
IS
not
distorted
To do th
s
place
the pressure
plate
on
to
the surface
plate
press
down the
plate
and
Insert
feeler gauges
to
determine the gallS between the
pressure
plate
and
the
surface
plate
If thiS exceeds 0 1
mm
0004
In
I
repaor
or
replace
pressure
plate
The pressure
plate
can
be skimmed off but the
maximum
amount
of metal that
can
be removed
IS
1 0
mm
0004
In
Clutch spring
D
aphragm
clutch
With
the
diaphragm
sprong assembled
to
the pressure
plate
Inspect the
assembly height
and the sprong load
To do thiS
place
distance pieces of 78
mm
0307
to
height
on
to
the
base
plate
and bolt down the clutch
cover
Measure the
height
B
In
Fig
F 9
at
a
diameter of 44
mm
1 732
In
The release
fingers
should be between 43
45
mm
1 693
1 772
In
from
the base
plate
If thiS
IS
not
the
case
replace
the sprong
With
a
plate placed
on
the clutch
press down the clutch
Fig
F 10
by
78
mm
0307
to
or
until the clutch droven
plate
hub
IS
flush With the
edge
of the clutch
cover
mounting
face when the
applied
load should be 350
kg
770 Ibs
If less
replace
the
diaphragm
spring
Do
not
press the clutch spring
down
by
more
than 9
mm
035
In
as
the spring
might
break
Clutch spnngs
Cot spong clutch
If the load
on
the assembled clutch
IS
reduced
by
more
then
15
or
the free
length
of the Call springs has altered
by
more
than 1 5
mm
006
In
or
the deflection between
A
and
B
In
Fig
F 11
IS more
than 5
mm
per 100
mm
02
In
per 394
In
It
becomes necessary
to
replace
the clutch springs
as a
set
Release
beanng
Replace
the release
bearing
If the
wear IS
exceSSive
causing
too
much
play
or
there
IS
roughness
or a
step formed
or
If the
37
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