7) Main assembly
of engine
gauge.
Dimension
axial clearance of crankshaft
Always
pay
special attention
to absolute cleanness.
Any
foreign
matter and smallest metallic
particle
in the oil circuit wouldberuinous
to thejournal
bearings and couldcauseengine
failureorconsiderable
reduction of service life.
INOTE:
All
O-rings, oil seals
and
gaskets
have to be
renewed
at re-assembly.
7.1,)
Crankcase
After
dimensions
are taken and
recorded,
split crankcase again.
Fit
the
right
crankcase half
(cast
mark
're')
on
trestle.
Place
greased
thrust
ring halves
serving as axial crankshaft
spacers
with coated side showing
towards outside,
into
crankcase.
Lubricate
bearing
halves
and
place
crankshaft ass'y fitted with timing
gear
into
position.
Turn crankshaft so
that timing
mark
on
timing
gear
aligns with crankcase
joint
face.
Check
axial clearance of crankshaft,
using
feeler
new
mm
(in)
wear limit mm
(in)
0,08
+
O,32
(0,m3 +
0,013) 0J0
(,@0)
Oil
ovemrnning
gear
50
T.
and
bearing bush and
fit
on
magneto
end of crankshaft. Apply
MOLYKOTE
GN
paste
to cams and lubricate bearings of camshaft.
Place
camshaft fitted
with
timing
gear, pump
gear
and
helical
gear
for rev-counter
(optional)
in
position.
Ensure
proper
coordination
of
marks on timing
gears,
thus marks are
parallel
now
to
joint
face.
Placepre-grease.loil
seal30x47
x7
ll,S,rollerbearingandretainingring
47x7,75 forprop
shaft in
position.
On
engines
with vacuum
pump,
fit
pre-assembled
drive
into
crankcase. Place
7
O-rings
9x2
in right
crankcase
half.
Now insert
journal
bearing
halves
into
the
leftcrankcase half
(castmark
'li')
and
oil slightly.
Fit
both dowel
pins
8x24, or starting from
engine
no3,792.567,
onedowel
pin
O
8x20
and
five
dowel bushes
O
for
crank-
case
alignment.
Apply LOCTITE
57
4
to
sealing face
of
left
crankcase
half and
join
with right
crankcase
half.
IATTENTION: Keep
a 3
mm
(1/
8") wide strip
0 along bear-
ings free
of sealing
com-
pounds
by
reasons
of
pre-
venting
passing
into
gap
of
bearing
halves
when
tight-
ening crankcase
screws.
Lubricant is
supplied via
bores
@!
53.t"t'"n'
Rm:'912:UL
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