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Ignition System
DESCRIPTION
The 1300
c c
and the 1600
c c
engines With
Single
carburettors
are
fitted With the Ignition distributor
model
D41058 whilst
the 1600
c c
engine With
twin
carburettors has model D40054
The outside appearance of both distributor models
IS
alike
IGNITION DISTRIBUTOR
Removal
Disconnect the
high
tension
cables from the
spark plugs
and the
Ignition coli and detach the primary
wire
from the distributor
Remove
the
vacuum
pipe
from
the distributor
connection
slacken the distributor
clamp
bolt and withdraw the distributor
IGNITION DISTRIBUTOR
Dlsmanthng
Remove the distributor
cap
and
pull
off the
rotor
Loosen the
two
vacuum
Unit
securing
screws
and 11ft off the
Unit
Unscrew
the fixed
contact
POint
set
screw
and 11ft off the pOint Take off
the spring
clip
from the piVOt post of the moveable
contact
breaker pOint and
remove
the
contact
arm
From the Side of the
distributor
body
remove
the
two
spring
clips
and
remove
the
contact
breaker base
plate
see
Fig
D 2
Take
care
not to
loose
the steel balls between the breaker spring and the breaker
plate
and those between the breaker
plates
SUitably
support
the distributor shaft from
underneath and
drive
out
the drive gear retaining pin
uSing
a
SUitable
punch
Fig
D 3
Remove the gear and the sI1Ims after
marking
the
relation of the shaft and the gear and Withdraw the distributor
shaft from
the other Side
Fig
D 4
From the InSide of the
distributor
cam
remove
the
set
screw
and
pull
off the
cam
Carefully
unhook the
flyweight
springs Without
stretching
or
deforming
them
IGNITION DISTRIBUTOR
Assembly
Thoroughly
clean all parts and
examine
the distributor cap for
cracks carbon
tracking
and burnt
or
corroded terminals Check
the carbon brush for
excessive
wear
and If necessary
remove
defective
parts
Check the
contact
breaker gaps for pitting
replaCing
them If
badly
marked
Light damage
can
be smoothed
With
an
011
stone
Check the shaft for
wear
and proper f
It
In
the
body
Check the
condensor for short
or
open
circuits
and
replace
If necessary
Check
the
vacuum
Unit
for
operation
and the
flyweight
mechamsm for freedom of movement
The
assembly
is
a
reversal of the removal
procedure
Refer
to
Fig
D 5 when
assembling
thJ
flyweight
mechamsm
When the
distributor
isassembled
connect
a
spring scale
on
the end of the
contact
arm
and
slowly pull
the spring scale lIWay from the
fixed contact POint
Read off the indication
at
the moment
when the
arm
is
lust
lifting
from the fixed
POint
See F Ig D
61
The correct value
IS
0 50
0 65
kg 1
10
1 43 Ib
Adjust
the
con1llct breaker gap
as
described below
CONTACT
BREAKER
GAP
Adjultment
With
the distributor
fitted
in
reverse
order
to
the removal
procedure
turn
over
the engine until the fibre
pad
of the
contact
breaker
ann IS
at
the
highest
POint of the distributor
earn
Slacken the
clamping
screw at
the fixed contact
pOint
and
turn
the
adjuster
screw
With
a
screwdriver until
a
contact gap of
045
055
mm
0012
0022
In
IS
obtained
Retighten
the
clamping
screw
and uSing
a
feeler gauge
rlH
heck the
contact
breaker gap
to ensure
that the fixed
contact
breaker
plate
has
not
moved while the
clamping
screw was
tightened
The
contact
breaker POints
can
be cleaned
by
uSing
a
contact
file
or an
011
stone
The raised
areas on
the contact should be
filed off but do
not
attempt
to
remove
the
crater
In
the other
contact
After
cleaning
the contacts
they
should be
placed
opposite each other meeting
over a
Wide
area
If the contacts
only
meet
partially
It
IS
pOSSible
that
overheating
burning
and
sparking
could
develop
A
View
of the
contact
breaker
assembly
IS
shown
In
Fig
D 7
The
adjustment
of the pOints
IS
shown
In
Fig
D8
IGNITION TIMING
Adjultment
Remove the distributor
vacuum
line and start the engine With
the engine running
at
Idle
speed proceed
as
follows
USing
a
stroboscopIC
tlml
ng
light
connected
In
accordance With
the instructIOns of the manufacturer check that the timing
case
pOinter
IS In
line With the timing mark
on
the crankshaft which
Will be made
statIOnary
by
the effect of the timing
IIgt
Each
of the
marks
on
the crankshaft
pulley
represents
50
of the
crank
angle
The
tlml
ng
setting
IS as
follows
1300
c c
engine
1600
c c
w
SC
1600
c c
w
T C
1008
T DC
1600
rpm
100
8 T D C
1600
rpm
1408TDC
650rpm
wlSC
Single
carburettor
w
T C
TWin carburettor
CHECKING THE CENTRIFUGAL ADVANCE
Disconnect the
vaaJum
pipe from the distributor
hOUSing
paint
a
white line
on
the crankshaft
pulley
and
start
the engine
Direct the
flash of
the
stroboscopiC timing
light
on
the
crankshaft
pulley
and observe the movement of the white line
whilst
the
engine
speed
IS
slowly
Increased
The
distance
between the
IgnitIOn timing pOinter
on
the timing gear
cover
and
the white
line should
Increase
noticeably
Incheatlng
a
satisfactory
operation of the
centrifugal
advance mechanism If
the paint marks appears
to move
back and forth
In an
Irregular
manner
It may be that the
flyweights
are
sticking
If necessary
lubricate the distributor
to
free
off the
weights
CHECKING THE VACUUM
ADVANCE
MECHANISM
Increase the engine
speed
to about 1200
1500 rpm
until the
throttle disc valve
uncovers
the
vacuum
drllhng
With the 8Q8IIIll
running
dISCOnnect the
vacuum
pipe
from
the distributor
housing
and
re
connect
in
turn
Observe the white
paint
hne
on
23
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