ELECTRICAL EQUIPMENT
assembly are freed. Take care not to
lose the ratchet and coil type springs
located under the micrometer nut.
The complete shaft assembly, with
automatic timing control and
cam
foot
can
now be removed from the dis-
tributor body (see
(ii)
below).
(i)
Contact Breaker
To dismantle the assembly fur-
ther, remove the nut, insulating
piece and connections from the
pillar on which the contact breaker
spring is anchored. Slide out the
terminal moulding. Lift off the
contact breaker lever and the in-
sulating washers beneath it. Re-
move the
screw(s) securing the
fixed contact plate, together with
the spring and plain steel washers
and take off the plate. Withdraw
the single screw securing the
capacitor and, on earlier models,
the contact breaker earthing lead.
Dismantle the contact breaker
base assembly by turning the
base plate clockwise and pulling
to release
it
from the moving
contact breaker plate. On earlier
models remove the circlip and
star washer located under the base
plate.
(5)
Shaft
and
Action Plate
To dismantle the assembly hr-
ther, take out the screw inside the
cam
and remove the
cam
and
cam
foot. The weights, springs and
toggles (when fitted) of the auto-
matic
timing
control can now be
lifted off the action plate. Note
that a distance collar is fitted on
the shaft underneath the action
plate.
(f
)
Bearing Replacement
The single long bearing bush used
in
this distributor
can
be pressed out of
the shank by means of a shouldered
mandrel.
If the bearing has been removed the
distributor must be assembled with
a new bush fitted. The bush should be
prepared for fitting by allowing it to
stand completely immersed in medium
viscosity (S.A.E.304) engine oil for
at least
24
hours. In cases of extreme
urgency, this period of soaking may be
shortened by heating the oil to
100°C.
for two hours, then allowing to cool
before removing the bush.
Press the bearing into the shank, using
a shouldered, polished mandrel of the
same diameter as the shaft.
Under no circumstances should the
bush be overbored by reamering or
any other means, since this
will impair
the porosity and thereby the effective
lubricating quality of the bush.
(g)
Re-assembly
The following instructions assume that
complete
dismantling has been under-
taken.
(i) Place the distance collar over the
shaft, smear the shaft with Rago-
sine Molybdenised non-creep oil
or clean engine oil, and
fit
it into
its bearing.
(ii) Refit the vacuum
unit
into its
housing and replace the springs,
milled adjusting nut and securing
circlip.
(iii)
Re-assemble the centrifugal timing
control. See that the springs are
not stretched or damaged. Place
the
cam
and
cam
foot assembly
over the shaft, engaging the pro-
jections on the cam foot with the
toggles, and fit the securing screw.
(iv) Before re-assembling the contact
breaker base assembly, lightly
smear the base plate with Rago-
sine Molybdenised non-creep oil
or Mobilgrease No.
2.
On earlier
distributors, the felt pad under
the rotating contact breaker plate
should be moistened with a few
drops of
thin
machine oil.
Fit the rotating plate to the con-
tact breaker base plate and secure
with the star washer and circlip.
Refit the contact breaker base into
the distributor body. Engage the
link
from the vacuum unit with
the bearing bush in the rotating
plate and secure with the split
pin. Insert the two base plates
securing screws, one of which also
secures one end of the earthing lead.
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