Clutch Springs: Diaphragm Clutch/Coil Spring Clutch; Clutch Assembly (Coil Spring Type); Coil Spring Clutch Adjusting; Clutch Installation/Clutch Pedal Removal And Installation - Datsun 510 series Workshop Manual

The coil
spring
clutch pressure
plate can
be
lapped
with
a
surface
grinder
to
remove
dents or
scratches
only
the minimum
amount
of metal should be removed
to restore
the surface
Check the
plate
for distortion
by placing
it
on a
surface
plate with
the friction face towards the surface
plate
Press
the
pressure
plate
down and insert
a
feeler gauge of 1 0mm
0 0039
in
between the
pressure
plate
and surface
plate If it
is
possible to
insert the feeler gauge then the pressure plate
must
be
repaired
or
replaced
The
plate
can
be skimmed but the
maximum
amount
of metal that
can
be removed is 1 0mm
0 0039in
CLUTCH SPRING Diaphragm
clutch
With the diaphragm spring assembled to
the pressure
plate
inspect
the spring height and load in the following
manner
Place distance pieces
of 7 8
mm
0 307 in
on
the base plate
as
shown
in
Fig E 3 and bolt down the clutch cover using
the
special
bolts
provided
with the kit
Meas Jre
the height B in
Fig
E 5 at
a
diameter of 44mm 1 732 in The release
fingers
should
not
exceed
a
height
of 43 45
mm
1 693 1 772 in
from the
base
plate Replace the spring
if the
height is in
excess
of
the
figures quoted
Press the dutch down
as
shown in
Fig
E 6 to
a depth
of
7 8mm 0 3 07 in
or
until the clutch driven
plate
upper surface
lines
up
with the
clutch
cover mounting
face If the load
applied
is less
than
350 kg 770 lbs it will be
necessary to
renew
the
diaphragm spring
Do
not
press the clutch disc down
by
more
than 9mm
0 3 5 in
or
the
diaphragm spring
may
be broken
CLUTCH SPRINGS Coil spring clutch
The
clutch
springs must
be
replaced
as a
set
if
any
of the
springs
are
found
to
be defective
Specifications
for the
springs
are
given in Technical Data
at
the end of this section Generally
a
spring
may
be considered
faulty if when assembled the load is
reduced
by
more
than 15
or
if the free
length
has altered
by
more
than 15mm 0 0590 in
or
if the deflection B
to
A
in Fig E 7 exceeds 5mm
per
100mm
0 2
in
per 3 94 in
Release Bearing
The release
bearing
should be renewed if
excessively worn
or
if roughness
can
be felt
when the bearing
is turned
by
hand
The bearing should also be renewed if the
grease has
leaked
away or
if the clearance between the clutch
cover
and inner
diameter of the sleeve is
more
than
0 5
mm
0 0197 in
The bearing can
be removed
using a
conventional puller
as
shown in Fig E 8 Two types of release bearings are available
and
care
must
be taken when
fitting
onto the
bearing sleeve
The release
bearing
should be
pressed
into
place
on
the
diaphragm
spring type of clutch with
a
force of 400 kg 880 lbs applied
at
the
outer
race as
shown in
Fig E
9
On the coil spring clutch
the
same
force must be
applied
at
the inner
race as
shown in
Fig
E IO It should be
possible to turn
the
bearing freely
and
smoothly when it is pressed into place
CLUTCH
Assembly
Coil
spring type
Press the
pin into the eyebolt and through the lug on the
pressure
plate
Place the three distance
pieces on
the surface
of the base
plate
of the
special
tool ST20050000 and
position
the pressure
plate
pressure
springs
and retainers
on
the
plate
Set the retracting springs
on
the cover and insert the
release levers
through
the
spring
Place the clutch
cover over
the pressure
plate
and
springs making
sure
that the
retracting
springs do
not
become
dislodged
or
distorted
Compress the
pressure
springs by screwing the
special
set
bolts into the holes in the
cover
Tighten the bolts gradually
in
a
diagonal pattern
to
avoid
distorting
the
cover
Place the
release levers
on
the eye bolts and
screw OR
the
securing
nuts
Place retaining hooks under the release levers and
remove
the
clutch
assembly from the base plate slackening the
set
bolts in
a
diagonal pattern
COIL SPRING CLUTCH
Adjusting
Screw the
centre
pillar into the base plate and place
the
high finger
over
the
pillar
The
height of the release levers
must
be
adjusted by turning
the
eye
bolt
nuts
until the
tops
of the
release levers
are
just touching
the
tip
of the
gauge
See
Fig
E
11 Remove the
centre pillar
when the release levers
are
correctly adjusted and
screw
in the actuating lever
Fig E 12
Turn the
actuating
mechanism several times
to
bed down the
parts
and then recheck the
height
of the release levers Check
for
run out as near
to
the edge
as
possible
and
readjust
if the
deviation is more than 0 5 mrn
0 020 in
CLUTCH InsWlation
Ensure that the friction faces are
free from oil and grease
and
place the driven plate
on
the flywheel The longer chamfered
splined
end of the
assembly
should face the
gearbox
Use
a
spare drive shaft
to
align
the driven
plate
The shaft must be
inserted through the
splined
hub of the driven
plate
and into
the pilot bearing of the flywheel
Place the clutch
cover
into position on the
flywheel
and
tighten
the dutch bolts gradually in
a
diagonal pattern
to
a
torque reading
of 1 5 2 2
kgm
11
16Ib ft
Remove the
dummy
shaft and the
restraining
hooks from the release levers
Refit the
release
bearing and the bell housing
CLUTCH PEDAL
Removal and Installation
Remove the clevis pin from the end of the
master
cylinder pushrod
and disconnect the
pushrod Remove the
return spring
Remove the
pushrod
after
slackening
the
pushrod
adjuster Coil spring clutch only Remove the
pedal
lever
securing
bolt slacken the handbrake bracket bolts and lift
out
the
pedal
Clean all
parts thoroughly
and check them for
wear or
damage paying particular attention
to
the rubber parts
return
spring
and
pedal
lever bush
Installation of the clutch pedal is
a
reversal of the
removal procedures
45