11
Reconnect
the electrical wires.
12
Reconnect the cable to the accelerator
pedal.
Install
a new sheath on the carburetter end of the cable and
install the
adjustment shim between
the
sheath and
the
carburetter before connecting the cable to the
accelerator control lever.
5:10 Hydraulic
clutch operation
From 1968
the clutch
is
operated by the hydraulic
system illustrated in FIG
5:13.
As will
be seen, this
consists of a master cylinder, operated
directly by the
clutch
pedal
and
having
an
integral fluid
reservoir and
a slave cylinder mounted
on the clutch housing and
operating
directly on the end of the clutch
fork
lever.
As the master
cylinder
incorporates
a valve which
maintains a residual
oressure
in the
circuit no means of
adjustment are
provided
and the
free
play
at the
clutch
is
nil.
Master cylinder:
This can be removed without
disturbing the
pedal.
After taking steps to avoid fluid leakage,
disconnect the
fluid supply
pipe
as
shown
and then
remove
the two
securing bolts.
Remove the wire clip
and
lift
off the top cover and
gasket.
ExtÍact the spÍing clip
on
the supply valve.
Remove the circlip and washer, then withdraw the
piston
and the secondary
cup
followed
by the
primary
cup, spring and supply valve.
Reassembly is
a
reversal
of the above
procedure,
being
careful to
see that the wider end of the return spring is
at
the inner end of the cvlinder.
Slave cylinder:
To remove the slave
cylinder,
remove
the rear securing
circlip on the clutch casing
and
pull
the cylinder out
towards
the
front.
The
piston
operating rod remains
attached to the clutch Íork lever.
The components
of the slave cylinder are clearly
shown in
the
illustration
and may
be
lifted
out
for
inspection
after removing the rubber
boot.
When refitting
the slave cylinder see that the bleed
screw
is
on the bottom and then bleed the system.
It
should not be necessaÍy to mention
that strict
cleanliness must
be observed when handling these
parts
as with
all
hydraulic systems.
Bleeding:
Raise
the
front
of the car or run it
over a
pit
and ensure
that
the fluid reservoir is ful..
Attach
a
rubber
tube to the
bleed nipple
and
immerse
its other end in a clean
glass
jar
containing
a
quantity
of clean brake fluid. Unscrew
the bleed
screw,
Have an assistant to
operate fully
the clutch
pedal
a
few
times, noting that
at
first
there will be air bubbles in
the
fluid
expelled into
the
jar.
As soon
as the fluid emerges
free from
any bubbles, tighten
up the bleed screw,
take
off the rubber
tube and replace
the
protecting
cap.
Top
up
the reservoir
to within
f,
inch
of the cover
joint
face. The recommended
fluid is Lockheed
55.
5
:11
Clutch
fault
diagnosis
(a)
Drag
or spin
1
Oil or
gÍease
on
driven
plate
linings
2 Misalignment
between the engine
and the main drive
pinion
3
Driven
plate
hub
binding on main drive
pinion
splines
4 Binding
of
main
drive
pinion
bearing
5 Distorted
clutch
plate
6
Warped
or damaged
pressure
plate
or clutch
cc,yer
7 Broken
driven
plate
linings
8 Dirt
or
Íoreign
matter
in
clutch
(b)
Fierceness
or snatch
1
Check
1
and 2 in
(a)
2
Worn clutch linings
(c)
Slip
1 Check 1
in
(a)
2 Check 2 in
(b)
3
Weak
pressure
springs
(d)
Judder
1 Check 1
and
2 in
(a)
2 Pressure
plate
not
parallel
with
flywheel face
3 Contact area
of driven
plate
linings
not
evenly
d istributed
4 Bent first
motion
shaft
5
Buckled
driven
plate
6
Faulty
engine
or
gearbox
rubber mountings
7 Worn suspension
8
Weak
rear
springs
(e)
Rattle
1
Check 3 in
(c)
2 Broken
springs in driven
plate
3 Worn release mechanism
4 Excessive
backlash
in transmission
5
Wear in transmission
bearings
6 Release
bearing
loose
on Íork
(f)
Tick
or
knock
1 Worn first
motion shaÍt
spigot or bearing
2 Badly worn
splines in driven
plate
hub
3 Release
plate
out
of
line
4
Faulty
drive on
starter motor
5 Loose
flywheel
(g)
Driven
plate
fracture
1 Check
2
in
(a)
2 Drag
and distortion due
to
hanging
gearbox
in
plate
NUD
50
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