Clutch Description; Clutch Removal/Dismantling/Inspection/Adjustment - Datsun 510 series Workshop Manual

Clutch
DESCRIPTION
CLUTCH Removal and
Dismantling
CLUTCH
Inspection
and
Adjustment
CLUTCH Installation
CLUTCH PEDAL Removal and Installation
DESCRIPTION
Either
a
diaphragm spring or coil spring type
clutch is
fitted to
the vehicle The component parts of the diaphragm
spring
clutch
are
shown in
Fig
E l and the
component parts
of the coil spring
clutch
are
shown in
Fig
E 2
The clutch is of the
single dry plate type consisting
of
the drive plate clutch
coveT
and pressure
plate
and release
bearing
The driven
plate comprises
a
flexible disc and
splined
hub
which slides
on
the clutch shaft Friction
linings
are
rivetted to
both sides of the disc
The clutch
cover
and pressure
plate
are
combined by
nine
spring setting
bolts The
diaphragm
is dished to maintain
a
constant
pressure
on
the pressure
plate
which in
turn
holds
the driven plate in
contact
with the flywheel
The release
bearing
is
a
sealed type ball bearing mounted
on a
bearing sleeve Both
bearing
and sleeve
are
operated by the withdrawalleveT when
the clutch
pedal
is
operated
The clutch pedal
actuates
a
master cylinder
which transmits
fluid under pressure
to
a
slave cylinder The
movement
of the
slave
cylinder piston operates
the clutch withdrawal lever via
a
push
rod See
Fig
E 14
CLUTCH
Removal and Dismantling
The gearbox must
be removed from the vehicle before
the clutch
can
be withdrawn The procedures for removing the
gearbox can
be found in the section GEARBOX
If
a
diaphragm
clutch is fitted insert
a
spare clutch shaft
or a
special alignment tool ST20600000 into the
splines
of
the driven
plate
So that the dutch is supported Slacken the
six bolts
securing
the clutch
cover
to
the
flywheel by
a
single
turn at
a
time and in
a
diagonal
pattern until the
spring
pressure
is relieved Remove the bolts completely and lift
away
the
clutch
assembly
When removing the coil spring type clutch it
will be
necessary to
insert suitable hooks under the release levers
to
restrain the tension of the clutch spring before removing the
clutch
cover
lx llts
Ensure that the friction linings of the driven plate do not
become comtaminated with oil
or grease when
removing the
plate
from the
splined
shaft
Diaphragm clutch
The clutch
cover
and pressure plate assembly
should
not
be dismantled and must
be replaced if
wear or
damage has
occurred Make
sure
that the friction face of the pressure
plate
CLUTCH PEDAL
Adjusting
CLUTCH MASTER CYLINDER
CLUTCH SLAVE CYLINDER
CLUTCH WITHDRAWAL LEVER Adjusting
CLUTCH SYSTEM
Bleeding
is
perfectly flat and smooth
Coil spring clutch
A
special
tool No ST200S0000 is available
to ensure
that
the
clutch
can
be dismantled and
accurately
reassembled The
tool shown in
Fig
E 3 consists of
a
Base
plate
I Centre
spigot 2 Distance pieces 3 Height
gauge
4
Operating
lever
5 Securing bolts 6
A
chart is included
to
indicate the various
parts
to
be used
for each type of clutch
To dismantle the clutch
place the distance pieces on the
base
plate
as
shown and
arrange
the clutch
cover on
the base
plate
so
that the
cover
holes coincide with the threaded holes
in
the base plate
Insert
the securing bolts
provided
in the kit
and
tighten
them
gradually and evenly in
a
diagonal pattern
until the
cover
is
firmly
attached to
the base plate Mark the
clutch
cover
the pressure
plate lugs
and the release levers with
a
centre
punch
so
that they
can
be reassembled in their
original
positions
Remove the
restraining
hooks from the release levers and
unscrew
the three
nuts
from the eye bolts
Slowly release the
pressure
on
the clutch coil
springs by unscrewing
the bolts
securing the
cover
to
the base plate
and lift off the
cover
springs
and pressure plate
CLUTCH
Inspection
and
Adjustment
Use
a
solvent
to
clean the dismantled parts
with the
exception
of the disc
linings
and the release bearing
Check the clutch
cover
diaphragm spring
and pressure
plate assembly
for
wear or
damage and
renew
the complete
assembly
if necessary The pressure
plate
on
the coil spring
clutch can
be lapped if
necessary as
described below Ensure
that the disc rivets are
not
loosened and inspect the linings
for
contamination Grease
or
oil should be removed and the linings
dressed
using
a
wire brush
Check the disc for
run
ut
using a
dial gauge
as
shown in
Fig
E 4 Position the dial gauge at
a
point
approximately
9Smm
3 74 in
from the
centre
of the disc and check that the
run
out
does
not
exceed the
permissible
limit of 0 5
mm
0 02in
A
slight deflection
can
be corrected by hand pressure
with
the disc mounted
on
the gearbox shaft
The disc
must
be renewed
or
relined if the
height of the
linings
above the rivets is less than 0 3mm 0 012 in
Replace
the
bearing sleeve if it shows signs of
wear
at
the
point
of
contact
with the withdrawal lever Replace the release bearing
if grease is
leaking
from it
or
if it is
noisy
when turned
43