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8
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Before tightening the crankcase securing nuts,
ensure that there is end float on the camshaft,
indicating its freedom.
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9
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Fit the crankcase front and rear screws, studs,
nuts and washers.
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10
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Fit the short front crankcase mating bolt from
drive side to timing side then fit the front bottom
stud unless the crankcase is to be mounted in the
vice in which case this front bottom stud should be
omitted until a later stage.
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11
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Fit the two slot headed set screws from the
timing side.
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12
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Tighten the mating nuts and screws evenly in
rotation and wipe away surplus jointing compound
remaining on the outside of the crankcase joint
facing.
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SECTION C30
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ASSEMBLING RIGHT (TIMING SIDE) OF ENGINE
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Having assembled the crankcases as detailed in
Section C29, mount the crankcases in a plain jaw
vice to facilitate handling. Re-assembly of the cam
chain, sprockets and oil pump may now be undertaken
as follows:
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1
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Fit the oil sealing disc over the timing side
crankshaft, lip outwards.
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2
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Fit the cut-away backing washer.
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3
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Fit the woodruff key into the crankshaft then
place on the crankshaft pinion, chamfered teeth and
timing mark outwards. It may be necessary to tap
the pinion fully home using a suitable tube as a
drift.
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4
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Turn the crankshaft to top dead centre so that
the timing pinion marking is uppermost.
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5
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Take the intermediate gear sprocket, the
camshaft sprocket and cam chain, assembling as
shown in Fig. C36. For correct timing the timing
marks must be 10 rollers apart on the chain as
shown in the illustration.
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6
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Locate the camshaft sprocket and intermediate
gear and sprocket in position, mating up the marked
space between the teeth on the intermediate gear
with the marked tooth on the timing pinlon. On all
engines it will be found that there is a paint
marking to illustrate more clearly the timing
position on the intermediate timing gear.
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7
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Assemble the chain tensioner as shown in Fig.
C37, noting that the clamping plates differ, the
inner one being thinner than the outer and the
inner being fitted long end down whilst the outer
clamping plate is fitted long end up.
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8
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Fit the chain tensioner, fan disc washers and
nuts moving the tensioner blade up to give a
maximum 1/8 in. (3.17 mm) up and down movement at
the tightest point of the chain and nip up the
tensioner securing nut. Before finally locking up
these nuts, rotate the crankshaft a little at a
time, checking at each stage the chain tension lest
there should be a tight spot on some point of the
chain. When chain tension is correct, finally lock
up the tensioner securing nuts.
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