SECTION C29
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RE-ASSEMBLING CRANKSHAFT TO CRANKCASES
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Since it is simpler to slide the drive side
crankcase with the outer main bearing race over the
complete assembly of the other crankcase with
crankshaft than vice versa, we recommend the
following routine:
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1
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Push the timing side crankcase over the
crankshaf which must be supported upright on the
bench See Fig C34. At this time check that the
connecting rods clear the crankcase mouth of the
crankshaft end of the bearing. If the bearing is
too tight to push home over the crank, place a
scrap main bearing inner race and a large washer
over the crankshaft, outboard of the timing side
crankcase then, using the oil pump driving worm on
the crankshaft, pull it home through the bearing.
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2
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Position the camshaft thrust washer over the
timing side camshaft bush and locate this, flat
side towards the crankcase and bush, locating with
a blob of grease. On engines after 200000 there are
2 thrust washers at the right hand side, the tabs
of which must face towards the right crankcase.
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It is important that the tabs are properly
located in the hole and that they are not dislodged
at a later stage when the camshaft sprocket is
fitted.
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3
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Smear the timing side crankcase joint facing
with a non-setting sealing compound. A little may
be applied to the timing side case facing where
there is no spigot.
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4
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Into the drive side camshaft bush fit the rotary
disc followed by the spring on engines before
200000 and camshaft, oiling the bearing surface
slightly.
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5
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Engage the camshaft with the driving dogs on the
disc on engines before 200000.
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6
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Offer the drive side crankcase to the timing
side atter oiling the camshaft bearing area and the
drive side roller main bearing. The operation of
mating the crankcases is shown in Fig. C35. It will
be noted that the camshaft is held in position
against the breather disc and spring with one
finger during this operation before 200000. Ensure
that washer tabs are seated throughout this
operation until cases are mated. It is most
important that the drive side connecting rod does
not come into contact with the crankcase mouth and
at the final stage of mating the crankcases, it may
well be necessary to turn the tachometer drive to
locate into the camshatt worm drive.
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7
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Now tap the crankcases together with a hide
hammer until the joint faces meet all-round.
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