SECTION C16
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DISMANTLING THE CRANKCASES
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The majority of the work on the crankcases can
be carried out best with the crankcase mounted in a
plain jaw vice as shown in Fig C19.
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The basic order of dismantling is to remove the
timing cover and dismantle the camshaft chain and
sprockets, then the oil pump. At this stage the
crankcases shoud be removed from the vice to be
parted for removal of the crankshaft. The full
routine is described below:
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1
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If the remaining crankcase bottom bolt is still
fitted, this shoud be removed to allow the
crankcase to be mounted securely in a vice.
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2
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Remove the two contact breaker cover screws and
lift away the C.B. cover.
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3
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Remove the contact breaker cam centre bolt,
serrated washer and plain washer.
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4
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Using service tool 060934 as shown in Fig C20,
screw the tool home through the contact breaker cam
until the cam is lifted off the camsheft taper. It
is unnecessary to remove the contact breaker plate
from the timing cover at this stage unless so
desired.
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5
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Remove the timing cover screws and part the
joint between the timing cover and crankcase by a
careful tap from behind the pressure release valve
body using a hide hammer.
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6
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Lift the timing cover away, withdrawing the
contact breaker lead from the timing case. It may
be necessary to turn one of the snap connector
bullets backwards so that the lead feeds through
the case, one snap connector bullet at a time.
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7
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Remove the two nuts securing the oil pump. The
oil pump may be quite tight on its studs and in
these circumstances it is advantageous to turn the
oil pump drive wheel nut so that the oil pump will
pull itself away along the worm drive. This
operation is shown in Fig. C21.
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